Exhibit 10.2

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Execution Copy

COLLABORATION AGREEMENT

BY AND BETWEEN

MOMENTA PHARMACEUTICALS, INC.

AND

MYLAN IRELAND LIMITED,

DATED AS

OF JANUARY 8, 2016

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

TABLE OF CONTENTS

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

2

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

COLLABORATION AGREEMENT

This Collaboration Agreement (the “ Agreement ”), executed as of January 8, 2016 (the “ Execution Date ”), is made by and between Momenta Pharmaceuticals, Inc., a Delaware corporation (“ Momenta ”), with a principal place of business at 675 West Kendall Street, Cambridge, Massachusetts 02142, and Mylan Ireland Limited, a limited company organized under the laws of Ireland (“ Mylan ”), with a principal place of business at South Bank House, Barrow Street, 6 th  Floor, Dublin 4, Ireland.  Momenta and Mylan may each be referred to individually as a “ Party ” or, collectively, the “ Parties ”.

RECITALS

The Parties desire to collaborate with respect to the development, manufacture and commercialization of a portfolio of biosimilar versions of certain reference brand biologic products, as described below.

In consideration of the premises set forth above and the mutual covenants contained herein, and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, Momenta and Mylan agree as follows:

ARTICLE 1.
DEFINITIONS

The capitalized terms used in this Agreement (other than the headings of the Sections or Articles) have the following meanings set forth in this Article 1, or, if not listed in this Article 1, the meanings as designated in the text of this Agreement.

1.1                                “Abatacept Innovator” means Bristol-Myers Squibb Company and its Affiliates, or any successor in interest thereto with respect to Orencia®, and Persons acting under authority thereof or in collaboration therewith, whether by contract, pursuant to a joint venture or otherwise.

1.2                                “ Accounting Standards ” means GAAP, consistently applied by the applicable Party.

1.3                                “ Additional Clinical Trial ” means a controlled clinical trial of a Product in human patients to generate safety, efficacy or clinical immunogenicity data to demonstrate that such Product is highly similar to its Reference Product and to demonstrate safety, purity, and potency of such Product, in the proposed therapeutic indication, which information is sufficient to support the filing for Regulatory Approval under Section 351(k) of the PHS Act, or corresponding laws or their implementing regulations in other countries within the Territory.  For clarity, an Additional Clinical Trial may be conducted using a single dose or regimen or multiple doses or regimens, as appropriate, and such Additional Clinical Trial may be conducted at multiple centers.  The Additional Clinical Trial shall be designed to be a pivotal study or, when appropriate outside the United States, a Phase 3 clinical trial, for such Product.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

3

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.4                                “ Additional Development Activity ” has the meaning set forth in Section 2.2(b) .

1.5                                “ Affiliate ” means, with respect to a Person any Person that controls, is controlled by, or is under common control with such Person, for so long as such control exists.  For purposes of the foregoing sentence, “control” means: (a) to possess, directly or indirectly, the power to direct affirmatively the management and policies of such Person, whether through ownership of voting securities or by contract relating to voting rights or corporate governance; (b) in the case of corporate entities, direct or indirect ownership of at least fifty percent (50%) of the stock or shares having the right to vote for the election of directors; or (c) in the case of non-corporate entities, direct or indirect ownership of at least fifty percent (50%) of the equity interest with the power to direct the management and policies of such non-corporate entities, or in each case (a) and (b) such lesser percentage which is the maximum allowed to be owned by a foreign corporation in a particular jurisdiction.

1.6                                “ [***] Innovator ” means [***] and its Affiliates, or any successor in interest thereto with respect to [***] , and Persons acting under authority thereof or in collaboration therewith, whether by contract, pursuant to a joint venture or otherwise.

1.7                                “ Allocable Legal Expense Share ” means with respect to each Product, fifty percent (50%) for Momenta and fifty percent (50%) for Mylan.

1.8                                “ Applicable Law ” means all applicable provisions of any and all federal, national, state, provincial, and local statutes, laws, rules, regulations, administrative codes, ordinances, decrees, orders, decisions, injunctions, awards, judgments, permits and licenses of or from any governmental authorities (including Regulatory Authorities) relating to or governing a Party’s obligations and rights under this Agreement.

1.9                                “ Approval Batch ” means any validation, confirmation or scale-up batch of Product manufactured in support of Regulatory Approval.

1.10                         “ Biosimilar ” means, with respect to a reference brand biologic product, a biologic product that is: (a) highly similar to such reference brand biologic product notwithstanding minor differences in clinically inactive components; and (b) has no clinically meaningful differences from such reference brand biologic product in terms of safety, purity and potency; and (c) would be eligible for review and approval by the FDA under Section 351(k) of the PHS Act or equivalent EU guidelines or Applicable Laws elsewhere in the Territory, regardless of whether approval is sought under Section 351(k) of the PHS Act or the EU equivalent guidelines for commercial purposes.

1.11                         “ Biological Entity ” means each of: (a) the fusion protein abatacept; (b) the [***] ; (c) the [***] ; (d) the [***] ; (e) the [***] ; and (f) the [***] , in each case as further described on Exhibit 1.11 , along with in each case any modifications to the foregoing that do not change the [***] or [***] of the biological entities described on Exhibit 1.11.

1.12                         “ BLA ” means a Biologics License Application filed pursuant to the requirements of the FDA under Section 351(k) of the PHS Act and 12 C.F.R., Section 601.2, to obtain

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

4

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Regulatory Approval for a Product in the United States, or the equivalent application or filing in another country (as applicable).

1.13                         “ BPCI Act ” means the Biologics Price Competition and Innovation Act of 2009 within the Patient Protection and Affordable Care Act, signed into law in March 2010, and as may be subsequently amended.

1.14                         “Business Day” means any day other than a: (a) Saturday or Sunday; (b) day that is a recognized national holiday in the U.S.; or (c) day that commercial banks are authorized to close under the Applicable Laws of, or are in fact closed in, the Commonwealth of Massachusetts or State of New York.

1.15                         “ Calendar Quarter ” means each of the three (3) month periods ending March 31, June 30, September 30 and December 31; provided, however, that: (a) the first Calendar Quarter of the Term shall extend from the Effective Date to the end of the first complete Calendar Quarter thereafter; and (b) the last Calendar Quarter shall extend from the beginning of the Calendar Quarter in which this Agreement expires or terminates until the effective date of such expiration or termination.

1.16                         “Calendar Year” means: (a) for the first Calendar Year of the Term, the period beginning on the Effective Date and ending on December 31, 2016; (b) for each Calendar Year of the Term thereafter, each successive period beginning on January 1 and ending twelve (12) consecutive calendar months later on December 31; and (c) for the last Calendar Year of the Term, the period beginning on January 1 of the Calendar Year in which the Agreement expires or terminates and ending on the effective date of expiration or termination of this Agreement.

1.17                         “Claims” means, collectively, any and all Third Party demands, claims, actions and proceedings (whether criminal or civil, in contract, tort or otherwise).

1.18                         “ Clinical Development ” means any and all Development activities to be conducted in humans related to or in furtherance of Regulatory Approval, including all clinical trials and any such post-approval regulatory commitments, or Post-Approval Clinical Trials.  The Clinical Development activities to be performed as part of the Collaboration shall be as described in the applicable Product Work Plan.

1.19                         “ Collaboration ” means the Development, Manufacturing and Commercialization of, and the conduct of the relevant Legal Activities with respect to, the Products in the relevant countries in the Territory, under this Agreement as described herein and the applicable Product Work Plans.

1.20                         “ Collaboration Intellectual Property ” means all Collaboration Know-How and Collaboration Patent Rights.  Collaboration Intellectual Property shall exclude Momenta Intellectual Property and Mylan Intellectual Property.

1.21                         “ Collaboration Know-How ” means Know-How first conceived, derived or made in the course of the Collaboration jointly by the Parties or their Affiliates or their respective

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

5

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

employees, contractors or consultants.  Collaboration Know-How shall exclude Momenta Know-How and Mylan Know-How.

1.22                         “ Collaboration Patent Rights ” means Patent Rights claiming the Collaboration Know-How.  Collaboration Patent Rights shall exclude Momenta Patent Rights and Mylan Patent Rights.

1.23                         “ Commercialize ” “ Commercialization ” and “ Commercialization Activities ” means all activities of using, marketing, promoting, distributing, importing, offering for sale or selling a Product related to the Launch and commercialization of such Product in the respective countries of the Territory.  Such Commercialization Activities may include activities with respect to a Product that are directed to: (a) scientific publications; (b) physician and patient education; (c) market access, including sampling, pricing and reimbursement; (d) branding; (e) sales and marketing, including detailing, etailing and online marketing; (f) safety monitoring, including all safety reporting and pharmacovigilance activities associated with the Products; (g) post-marketing clinical studies, including the conduct of Post-Approval Clinical Trials and label extension; (h) lifecycle management; (i) medical affairs, including the use of medical science liaisons and speakers programs involving key opinion leaders; (j)  [***] programs and mechanisms, including [***] and [***] websites; (k) the recruiting, hiring, administration, operation and maintenance of the [***] such Product in the Territory, including [***] bulletins and other communications, [***] meetings , specialty [***], consultants, [***] reporting and other monitoring/tracking costs, [***] management, and home office personnel who support the [***] , including any activities of Momenta or Mylan under the Co-Commercialization Agreement; and (l) regulatory affairs associated with the Launch and commercialization of the Products, including periodic reporting, Product recalls and other field actions.  For avoidance of doubt, (a) through (l) above sets forth examples of activities that may constitute “Commercialization Activities” rather than a list of activities required to be performed by a Party or limiting the activities that would constitute Commercialization.  The Commercialization Activities to be performed as part of the Collaboration for any specific Product shall be as described in the applicable Commercialization Plan.

1.24                         “Commercialization Expenses” means, with respect to a Product, the out-of-pocket costs paid by a Party to a Third Party related to Commercialization and [***] actually incurred by a Party, after the Effective Date, in connection with Commercialization of such Product by or on behalf of a Party in accordance with the applicable Product Work Plan, as determined from the books and records of the applicable Party or its Affiliates maintained in accordance with the Accounting Standards.  For clarity, a Product’s Commercialization Expenses excludes the [***] for such Product and includes the out-of-pocket costs paid by, and the [***] actually incurred by, Mylan or Momenta in the conduct of activities under the Co-Commercialization Agreement.  Commercialization Expenses also include costs associated with Product recalls and other field actions and other similar costs associated with the Commercialization of the Products that may not be planned for in the Commercialization Plan.

1.25                         “ Commercialization Plan ” shall be a component of each Product Work Plan as further described at Section 2.1(c)  herein.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

6

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.26                         “ Commercial Scale ” means the scale of a chemical or biological process for the Manufacture of a Product in sufficient quantities to support the projected supply requirements for the marketed Product as of the First Commercial Sale of such Product.  Commercial Scale, as it relates to a Product, shall, as appropriate, be further defined in the applicable Product Work Plan.

1.27                         “ Commercially Reasonable Efforts ” means, with respect to the performing Party, the carrying out of obligations of such Party in a diligent and expeditious manner as is commonly practiced in the pharmaceutical industry, including the allocation of a commercially reasonable level of personnel and financial resources, consistent with (and not materially less than) such level of resources and efforts that an established pharmaceutical company typically devotes to products of similar market potential at a similar stage of development or commercialization in its product lifecycle, taking into account scientific, technical, developmental, regulatory and commercial factors such as the product profile (including safety and efficacy), competitiveness of the marketplace, cost, profitability, regulatory approvals (including pricing approvals), the patent or other intellectual property position of the Product, and the regulatory requirements and conditions involved.

1.28                         “ Competing Product ” means, with respect to any Product: (a) the corresponding Reference Product ; (b) a Biosimilar of such Reference Product (other than such Product); and (c) any biological medicinal product incorporating the Biological Entity in such Product (but excluding, for clarity, products incorporating [***] or [***] that result in additional [***] or [***] ).  For example, a Competing Product to the Product known as M834 would be the Reference Product known as Orencia®, or another Biosimilar to Orencia®, but would exclude a biological medicinal product incorporating a protein that results from a [***] of the fusion protein abatacept where such [***] the [***] or [***] (including [***] and [***] ) of abatacept.

1.29                         “ Complex Generic Product ” means a generic version of a complex pharmaceutical product (other than [***] or [***]) , which may include: (a) a pharmaceutical product with a complex active ingredient (such as [***] complex mixtures and natural source products); (b) a pharmaceutical product with a complex formulation (such as [***] or [***] ); (c) a pharmaceutical product with a complex route of delivery (such as certain [***] ); or (d) complete drug-device combinations (such as pharmaceutical products delivered using a [***] or a [***] ).

1.30                         “ Confidential Information ” means: (a) all proprietary information and materials, patentable or otherwise, of a Party which is disclosed by or on behalf of such Party to the other Party or its representatives pursuant to and in contemplation of this Agreement, including, without limitation, biological or chemical substances, formulations, techniques, methodology, equipment, data, reports, Know-How, sources of supply, patent positioning, business plans and financial information; and (b) any other information designated by the disclosing Party to the other Party in writing as confidential or proprietary, whether or not related to making, using or selling a Product.  Notwithstanding the foregoing, the term ‘Confidential Information’ shall not include information: (w) which is or becomes generally available to the public other than as a result of disclosure thereof by the receiving Party; (x) which is lawfully received by the receiving Party on a non-confidential basis from a Third Party that is not, to the receiving Party’s knowledge, itself under any obligation of confidentiality or nondisclosure to the disclosing Party

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

7

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

or any other Person with respect to such information; (y) which is already known to the receiving Party at the time of disclosure by the disclosing Party; or (z) which can be shown by the receiving Party to have been independently developed by the receiving Party without use of or reference to the disclosing Party’s Confidential Information.

1.31                         “ Control ” means, with respect to any Patent Rights or any item of Know-How, the possession, whether by ownership or license (other than licensed by one Party to the other Party pursuant to this Agreement), by a Party or any of its Affiliates of the ability to grant access, a license or a sublicense as provided in this Agreement under such item or right without: (a) violating the terms of any agreement or other arrangement with, or any legal rights of, any Third Party; (b) violating the terms of any agreement to which such Party or its Affiliate is a party; or (c) requiring the consent of any Third Party.  For clarity, any such Patent Rights or item of Know-How acquired by a Party after the Effective Date, which is necessary to Develop, Manufacture or Commercialize a Product, shall be acquired in accordance with Section 4.2(a)(vii).

1.32                         “ Cost of Goods Sold ” or “ COGS ” means: (a) with respect to Product that is Manufactured by a Party or its Affiliates, the Manufacturing Cost of such Product; and (b) with respect to Product purchased by a Party or its Affiliates from a Third Party, such Party or its Affiliate’s [***] cost of acquisition of such Product (including the cost of the Biological Entity and all other materials, components and supplies included in, or consumed in the manufacture of, the Product), together in the case of (a) and (b) with: (i)  [***] and (ii)  [***] or [***] paid or payable by such Party or its Affiliates to any Third Parties for [***] or [***] for the [***] of Product where such obligation to make such payment [***] to the [***] , and together in the case of (b) with other costs incurred by such Party or its Affiliates and [***] such Product in accordance with Accounting Standards, including costs of shipping, handling, quality assurance and storage.  For clarity, COGS shall include such costs with respect to Approval Batches.  If any Approval Batches are [***] , the Parties will [***] the costs of such Approval Batches as a [***] .

1.33                         “Covers” means: (a) with respect to Know-How, that the making, using, selling or offering for sale of a given molecule, product, or item would require the use of such Know-How; and (b) with respect to Patent Rights, that the making, using, selling, offering for sale, or importation of a given molecule, product, or item would infringe a Valid Claim of such Patent Rights (in the absence of ownership of, or a license under, such Patent Rights).

1.34                         “ [***] Innovator ” means [***] and its Affiliates, or any successor in interest thereto with respect to [***] or [***] , and Persons acting under authority thereof or in collaboration therewith, whether by contract, pursuant to a joint venture or otherwise.

1.35                         “ Develop ”, “ Development ” and “ Development Activities ” means with respect to a Product, all activities either related to or in furtherance of the creation or scientific or technical improvement of such Product, or that are necessary or useful to obtain Regulatory Approval of such Product, whether such activities are conducted prior to the filing of an application for Regulatory Approval of such Product in any country in the Territory or thereafter.  Development Activities may include: (a) design of a biological process or chemical process to Manufacture a

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

8

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Product; (b) creation and selection of a cell line for production of such Product; (c) stability studies and quality analysis and quality control activities for the Product, including the creation and implementation of a process validation strategy; (d) formulation of the Product (including for bulk process intermediate and drug product) and associated stability studies; (e) creation and implementation of the Product Manufacturing process and strategy, including selection of Manufacturing facilities at each scale (including Commercial Scale ) ; (f) pre-clinical and clinical Manufacture and distribution of a Product; (g)  [***] of such Product and the applicable [***] to determine [***] or [***] ; (h) preclinical and, if applicable, clinical (in human) studies, bioequivalence studies, creation of analytical assays, data management, review and engagement of contract research organizations, preclinical and clinical document preparation, and other administrative activities associated with a clinical testing program; (i) creation and design of a [***] for the Product; (j) regulatory affairs for the Product prior to obtaining Regulatory Approval to market the Product, including the preparation and filing of applications for Regulatory Approval, and the development and selection of the Product label; and (k) statistical analysis in connection with the foregoing activities.  For avoidance of doubt, (a) through (k) above set forth examples of activities that would constitute “Development Activities” rather than a list of activities required to be performed by a Party or limiting activities to be performed by a Party.  The Development Activities to be performed as part of the Collaboration for any specific Product shall be as described in the applicable Product Work Plan.

1.36                         “ Development Expenses ” means, with respect to a Product, the costs actually incurred by or on behalf of a Party, including [***] and out-of-pocket costs paid by a Party to Third Parties (collectively) after the Effective Date in connection with the Development of such Product in accordance with the relevant Product Work Plan, as determined from the books and records of the applicable Party or its Affiliates maintained in accordance with the Accounting Standards and each Party’s policies and practices as such may be modified from time to time.  For clarity, Development Expenses shall include all filing fees and expenses associated with Regulatory Submissions for the Products as well as Manufacturing Costs associated with nonclinical or clinical supply of the Products (e.g., costs with respect to validation and scale-up batches of Product that are manufactured in support of Regulatory Approval and that are not saleable).

1.37                         “Divest” or “Divestiture” means, with respect to any Competing Product: (a) the sale, exclusive license or other transfer of all of the right, title and interest in and to such Competing Product in the applicable country(ies) in the Territory, including all technology, intellectual property and other assets relating solely thereto, to an independent Third Party, without the retention or reservation of any rights, license or interest (other than solely an economic interest and, in the event of a termination, customary residual rights) in such Competing Product with respect to the applicable country(ies) in the Territory; or (b) the shutdown of activities related to the Competing Product in the applicable country(ies) in the Territory such that no technology, intellectual property or other asset relating thereto is used by the applicable Party or its Affiliates and delivery of written confirmation from such Party to the other Party that the Divesting Party and its Affiliates covenant not to use any technology, intellectual property and assets solely relating to such Competing Product in the applicable country(ies) in the Territory during the Term.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

9

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.38                         “ Dollars ” or “ $ ” means the legal tender of the United States.

1.39                         “ [***] Innovator ” means [***] and its Affiliates, or any successor in interest thereto with respect to [***] and Persons acting under authority thereof or in collaboration therewith, whether by contract, pursuant to a joint venture or otherwise.

1.40                         “ Effective Date ” means the HSR Clearance Date, as defined in Section 12.12 .

1.41                         “ EMA ” or “ European Medicines Agency ” means the European Union agency for the evaluation of medicinal products, or any successor entity thereto.

1.42                         “ Enforcement Litigation ” shall have the meaning set forth at Section 5.4(b) .

1.43                         “ EU ” means the European Union.

1.44                         “ Fault ” means, with respect to a Party: (a) the breach of this Agreement by such Party, including a breach of a Party’s representations or warranties under Article 11 ; (b) the violation of Applicable Law in the performance of the Collaboration; or (c) the (i) negligence or gross negligence; (ii) willful misconduct; (iii) intentional misrepresentation; (iv) recklessness; or (v) fraud of or by such Party, in each case ((i) - (v)) in the Development or Manufacture for, or Commercialization in, the Territory of a Product or otherwise in the performance of any other rights or obligations under this Agreement.

1.45                         “ FDA ” or “ Food and Drug Administration ” means the U.S. Food and Drug Administration, or any successor entity thereto.

1.46                         “ Field ” means use for all therapeutic indications in humans.

1.47                         “Final Legal Clearance” means with respect to a Product that may infringe the Identified Patent Rights, on a country-by-country basis, the earliest of: (a) receipt by a Party or any of its Affiliates of a final: (i) unappealable judgment; (ii) unappealable administrative decision; or (iii) settlement, in any case that determines that the [***] or [***] of such Product does not infringe the relevant Identified Patent Rights in such country (due to non-infringement, invalidity or unenforceability); (b) receipt by a different Third Party of a final: (i) unappealable judgment; (ii) unappealable administrative decision; or (iii) settlement , in any case that determines that the [***] or [***] of such Product does not infringe the relevant Identified Patent Rights in such country (due to non-infringement, invalidity or unenforceability); or (c) in the event that, pursuant to Section 2.4(f), Mylan Launches such Product prior to obtaining Final Legal Clearance as described in clause (a) or (b) above, Momenta’s provision of written notice to Mylan indicating that [***] for [***] is [***] with respect to such Product;  provided however that such notice pursuant to this clause (c) shall not be effective until the earlier of: (I) at least ( [***] ) [***] after Mylan’s Launch of such Product; or (II) the obtaining of Final Legal Clearance as described in clause (a) or (b) above.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

10

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.48                         “ First Commercial Sale ” means, with respect to any Product, the first sale of such Product by a Party, its Sublicensee or any of their respective Affiliates to a Third Party following receipt of Regulatory Approval of such Product in the country of sale.

1.49                         “ FTE ” means the equivalent of the work of one (1) employee full-time for one (1) year (consisting of a total of [***] ( [***] ) hours per year, or such other number as may be agreed by the JSC) on or directly related to the Collaboration.  Any individual who devotes less than [***] ( [***] ) hours per year (or such other number as may be agreed by the JSC) shall be treated as an FTE on a pro-rata basis upon the actual number of hours worked divided by [***] ( [***] ) (or such other number as may be agreed by the JSC).  Unless modified by the JSC, the [***] ( [***] ) figure shall be used without regard to the Parties’ own internal definition of the number of hours that comprises an FTE.

1.50                         “ FTE Costs ” means the actual fully burdened cost per FTE on an annual basis and are intended to capture [***] and [***] , other [***] costs and [***] associated with the activities of such FTE.

1.51                         “ GAAP ” means U.S. Generally Accepted Accounting Principles.

1.52                         “ GMP ” or “ Good Manufacturing Practice ” means the current good manufacturing practice regulations of the FDA, including as described in the U.S. Code of Federal Regulations, Parts 210, 211, 601, and 606, or any applicable corresponding foreign regulations or their respective successor regulations.

1.53                         “Hold Separate Transaction” means any “hold separate” transaction (whether through the establishment of a trust or otherwise) involving the proposed sale of a Competing Product in the applicable country(ies) in the Territory pursuant to an agreement with any governmental authority responsible for antitrust laws.

1.54                         “ IND ” means: (a) an Investigational New Drug Application as defined in the United States Food, Drug and Cosmetic Act and applicable regulations promulgated thereunder by the FDA, including 21 C.F.R., part 312; or (b) a Clinical Trial Application or equivalent application in the EU, the filing of which is necessary to commence clinical testing of a pharmaceutical product in humans in a particular jurisdiction.

1.55                         “ IND Acceptance ” means, with respect to a Product, the earlier to occur of the date that: (a) written notice of a waiver of, or exemption from, the need to file an IND is received by a Party from the applicable Regulatory Authority and such waiver or exemption becomes effective, in each case either in the U.S. or the EU; or (b) authorization is obtained from the applicable Regulatory Authority in the U.S. or the EU to initiate dosing in humans, based on such Regulatory Authority’s review of analytical data comparing such Product to the Reference Product, which in the U.S. means: (i) thirty (30) days after FDA receives the IND, unless FDA notifies the sponsor that the investigations described in the IND are subject to a clinical hold; or (ii) on written notification by FDA that the clinical investigations in the IND may begin.  For avoidance of doubt, the written notice referred to in subsection (a) above may be in the form of a letter from the relevant Regulatory Authority approving the development plan of the Parties that

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

11

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

does not require human clinical trials as adequate to support Regulatory Approval of the applicable Product or an actual written waiver of an IND.

1.56                         “ Initial Clinical Trial ” means a human clinical trial of a Product (as required by the applicable Regulatory Authority) conducted to generate pharmacokinetic and pharmacodynamic (if relevant pharmacodynamic measures exist) data that is comparative to the applicable Reference Product, for purposes of supporting an application for Regulatory Approval under Section 351(k) of the PHS Act, or equivalent in other countries within the Territory.  The Initial Clinical Trial shall be designed to be a Phase 1 clinical trial for such Product but may also include additional features that could facilitate a waiver or targeting of the Additional Clinical Trial.

1.57                         “ Initial Press Releases ” shall have the meaning set forth at Section 7.2 herein.

1.58                         “ Innovator ” means the Abatacept Innovator, the [***] Innovator, the [***] Innovator, the [***] Innovator, the [***] Innovator, or the [***] Innovator, as applicable.

1.59                         “ [***] Innovator ” means [***] and its Affiliates, or any successor in interest thereto with respect to [***] , and Persons acting under authority thereof or in collaboration therewith, whether by contract, pursuant to a joint venture or otherwise.

1.60                         “ Joint Steering Committee ” or “ JSC ” shall have the meaning set forth in Section 3.1 .

1.61                         “ Know-How ” means information and materials, including, without limitation, ideas, concepts, discoveries, inventions, developments, improvements, know-how, expertise, trade secrets, designs, devices, equipment, process conditions, physical materials (including chemical or biological materials), production processes and designs, specifications, computer programs, formulas, techniques, methods, procedures, assay systems and applications, experimental results, data (including, without limitation, analytical, toxicological, pharmacological, clinical, bioequivalence, and stability data), documentation, and reports, whether patentable or otherwise.  For clarity, Know-How excludes Patent Rights.

1.62                         “ Launch ” means, with respect to any Product, to make (or the making of, as context requires) the First Commercial Sale of such Product.

1.63                         “ Legal Activities ” means legal work and advice relating to the Collaboration including: (a) Patent Activities and other activities under the Collaboration IP Plan; (b) legal work pertaining to Regulatory Approval, including [***] proceedings (including filings, appeals and related litigation); (c) Enforcement Litigation and Other Collaboration Litigation, including [***] and litigation under [***] (or other similar laws, rules or regulations under Applicable Law) as applicable to any Product; (d) creation of a litigation strategy for any Product; (e) management of governmental inquiries and investigations related to any Product; and (f) trademark activities related to any Product.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

12

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.64                         “ Legal Expenses ” means, with respect to a Product, the costs actually incurred by or on behalf of a Party on or after the Effective Date, including [***] and out-of-pocket expenses, in connection with Legal Activities for such Product conducted pursuant to this Agreement.  For avoidance of doubt, Legal Expenses includes the costs of [***] a [***] or other [***] in connection with Enforcement Litigation and Other Collaboration Litigation, and any resulting damages payable to Third Parties in connection with Enforcement Litigation or Other Collaboration Litigation.

1.65                         “Losses” means any and all liabilities, penalties, damages costs, fines, and expenses (including reasonable attorneys’ fees and other litigation expenses).

1.66                         “ Major Country ” means each of the [***] , and [***] .

1.67                         “Manufacture,” “Manufacturing” and “Manufacturing Activities” means, with respect to a Product, all activities involved in the production, storing, handling, packaging, labeling and distribution of Product to be Developed or Commercialized under this Agreement.  Such Manufacturing Activities may include: (a) creation and design of the Product packaging; (b) the creation and implementation of a commercial inventory and Product supply chain distribution strategy; (c) the manufacture of clinical and commercial inventory for the Product; (d) the manufacture of a delivery device for the Product; (e) the manufacture of the packaging for the Product; (f) quality control and quality assurance of the Product; (g) release of the Product; and (h) the distribution, delivery and storage of the Product.  For avoidance of doubt, (a) through (h) above sets forth examples of activities that would constitute “Manufacturing Activities” rather than a list of activities required to be performed by a Party.  The Manufacturing Activities to be performed as part of the Collaboration for any specific Product shall be as described in the applicable Product Work Plan.

1.68                         “ Manufacturing Cost ” means, with respect to a Product, the [***] and [***] costs incurred by a Party or its Affiliates determined in accordance with Accounting Standards and consistent with such Party’s internal accounting practices, consistently applied, for the Manufacture of such Product (provided that any such [***] are [***] to such Product), which costs may include:

(a)                                  the cost of materials (including Biological Entity), components, supplies and other resources directly or indirectly consumed, in each case including freight, insurance, shipping, packaging and other similar costs associated with acquiring such items;

(b)                                  labor (including salaries, wages and current period employee [***] ), including [***] salary and [***] to the manufacture of such Product;

(c)                                   the [***] cost or credit of any value-added taxes or duties paid or utilized (and not reimbursed or reimbursable) on account of such Product;

(d)                                  Third Party costs for the manufacture of such Product, including facilities fees, transportation costs, customs, duty and transit insurance costs;

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

13

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(e)                                   manufacturing variances (including [***] raw materials and finished goods, scrap, maintenance costs and batches that do not [***] to the applicable [***] ) incurred in the manufacture of such Product;

(f)                                    costs for quality control/assurance (including the costs of quantities destroyed in quality control testing) of such Product, including the costs of inspection, rejection and return of components, materials or services; and

(g)                                   other costs reasonably allocable to the manufacture of such Product, including allocable occupancy, [***] ( [***] for the Product in the Field consistent with the Product Work Plan), depreciation and amortization, allocable facilities costs, general and other overhead.

For clarity, Manufacturing Cost shall exclude [***] and other costs not allocable to the manufacture of Products hereunder.

1.69                         “ Momenta Improvement(s) ” means any Patent Rights or Know-How arising in the Development, Manufacture or Commercialization of the Products pursuant to this Agreement that are conceived, derived, acquired or made in the course of the Collaboration solely by Momenta, its Affiliates or their respective employees, contractors or consultants.  For clarity, any such Patent Rights or Know-How acquired by Momenta shall be acquired in accordance with Section 4.2(a)(vii).

1.70                         “ Momenta Intellectual Property ” means all Momenta Know-How, Momenta Patent Rights and Momenta Improvements.

1.71                         “ Momenta Know-How ” means all Know-How that is within the Control of Momenta and its Affiliates as of the Effective Date or during the Term, that: (a) Covers a Product; or (b) is necessary or reasonably useful for Mylan to exercise the rights licensed to it under the Agreement or to perform its obligations under the Agreement.

1.72                         “ Momenta Patent Rights ” means all Patent Rights that are within the Control of Momenta and its Affiliates as of the Effective Date or during the Term, that: (a) Cover a Product; or (b) are necessary or reasonably useful for Mylan to exercise the rights licensed to it under the Agreement or to perform its obligations under the Agreement.

1.73                         “ Mylan Improvement(s) ” means any Patent Rights or Know-How arising in the Development, Manufacture or Commercialization of the Products pursuant to the Agreement that are conceived, derived, acquired or made in the course of the Collaboration solely by Mylan, its Affiliates or their respective employees, contractors or consultants.  For clarity, any such Patent Rights or Know-How acquired by Mylan shall be acquired in accordance with Section 4.2(a)(vii).

1.74                         “ Mylan Intellectual Property ” means all Mylan Know-How, Mylan Patent Rights, and Mylan Improvements.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

14

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.75                         “ Mylan Know-How ” means all Know-How that is within the Control of Mylan and its Affiliates as of the Effective Date or during the Term, that: (a) Covers a Product; or (b) is necessary or reasonably useful for Momenta to exercise the rights licensed to it under the Agreement or to perform its obligations under the Agreement.

1.76                         “ Mylan Patent Rights ” means all Patent Rights that are within the Control of Mylan and its Affiliates as of the Effective Date or during the Term, that: (a) Cover a Product; or (b) are necessary or reasonably useful for Momenta to exercise the rights licensed to it under the Agreement or to perform its obligations under the Agreement.

1.77                         “ Net Sales ” means, with respect to a Product, the gross amount invoiced for the sale of such Product by a Party or its Affiliates (or, solely in the case of determining Net Sales when a royalty is owed on Net Sales of such Product pursuant to Section 10.6(a) , 10.6(b)  or 12.3(c) , its Sublicensee) (“ Selling Party ”) to a Third Party (whether an end user, distributor, Sublicensee or otherwise), less the following calculated in accordance with Accounting Standards: (a) cash, trade, prompt payment, quantity  and other discounts; (b) refunds, rebates, chargebacks, retroactive price adjustments, sales deductions, shelf stock or floor stock adjustments, billing errors, rejected goods, expired product, product recalls, and any other allowances which effectively reduce the gross selling price; (c) credits and allowances for damaged goods,  product returns and uncollectible accounts; and (d) credits, charge-backs, discounts, rebates, reimbursements, fees and other allowances provided to distributors, wholesalers, pharmacies, selling agents (excluding sales representatives of a Party or any of its Affiliates), group purchasing organizations, and managed care entities, buying groups, health insurance carriers/agencies, government institutions/agencies, health care organizations and other institutions or customers; (e) freight, insurance and handling costs (to the extent not paid by the Third Party customer); and (f) sales tax, value-added tax (“VAT”) and other taxes, duties or government charges levied on or measured by the billing amount, as adjusted for rebates or refunds, that are borne by the Selling Party and that are not refundable and to the extent non-creditable.  Net Sales shall exclude samples distributed in the usual course of business.

In the case of any sale of a Product between or among a Selling Party or its Affiliates for resale, Net Sales shall be calculated as above only on the value charged or invoiced on the first arm’s length sale thereafter to a Third Party.  If no such separate sales are made, Net Sales shall be determined by the Parties in good faith.  If the consideration for Products includes any non-cash element, then, in any such transaction, the Net Sales applicable to such transaction shall be the fair market value for the applicable quantity for the period in question in the applicable country of the Territory.  The fair market value shall be determined, wherever possible, by reference to the average selling price of the relevant Product in arm’s length transactions in the relevant country in the Territory.  Any Product transferred in connection with clinical and non-clinical research or clinical trials, Product promotional samples, compassionate sales or use, or indigent patient programs shall not be counted toward Net Sales; except that any Product sold as part of a named patient use program (or similar program where a Product can be sold in a country prior to Regulatory Approval being obtained for such Product in such country) will be counted toward Net Sales.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

15

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

If any Product is sold in combination with one or more other products (e.g., a delivery device) or active ingredients which are not the subject of this Agreement (as used in this definition of Net Sales, a “Combination”), then the gross amount invoiced for that Product shall be calculated by multiplying the gross amount invoiced for such Combination by the fraction A/(A+B), where “A” is the gross amount invoiced for the Product sold separately and “B” is the gross amount invoiced for the other active ingredient(s) sold separately.  If the other product or active ingredient is not sold separately, then the gross amount invoiced for that Product shall be calculated by multiplying the gross amount invoiced for the Combination by the fraction A/C, where “A” is the gross invoice amount for the Product, if sold separately, and “C” is the gross invoice amount for the Combination.

Notwithstanding anything herein to the contrary, neither Party shall price, discount or bundle payments received in any transaction, for the purpose of reducing or disadvantaging the Net Sales of the Product in favor of any other product provided by such Party.

1.78                         “ Other Collaboration Litigation ” means all: (a)  [***] the [***] and litigation process contemplated by Section 5.5(a) and corresponding laws of other countries; (b) administrative patent challenge procedures (including inter partes review, post grant review, ex parte reexamination, opposition and similar proceedings with respect to Third Party Patent Rights) contemplated by Section 5.5(a); (c) declaratory judgments contemplated by Section 5.5(a); and (d) patent infringement litigation filed by Third Parties against Mylan or Momenta relating to the Products and other litigation matters contemplated by Section 5.5(b), including the bringing of any counter-claims related to such litigation matters.

1.79                         “ Patent Activities ” means all activities of the Parties with respect to researching and analyzing [***] , and the preparation, filing, prosecution, maintenance, enforcement and defense of the Momenta Patent Rights licensed under Section 6.1, the Mylan Patent Rights licensed under Section 6.2 and Collaboration Patent Rights, including Legal Clearance Activities (such as the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings with respect to the Momenta Patent Rights, Mylan Patent Rights or Collaboration Patent Rights, as applicable) as well as litigation in courts and proceedings before trade commissions in the U.S. and other countries in the Territory.

1.80                         “ Patent Rights ” means all: (a) U.S. patents (including all reissues, substitutions, confirmations, re-registrations, re-examinations, validations, extensions, renewals or restorations); (b) U.S. patent applications (including all provisional applications, non-provisional application, continuations, continuations-in-part, divisional, continued prosecution applications, reissue applications or re-examination applications); and (c) all non-U.S. or international counterparts of any of the foregoing, or as applicable portions thereof or individual claims therein.

1.81                         “ Person ” means any individual, partnership, joint venture, limited liability company, corporation, firm, trust, association, unincorporated organization, or any other entity not specifically listed herein.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

16

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.82                         “ PHS Act ” means the Public Health Services Act (Title 42, U.S.C., Chapter 6A).  As used herein the PHS Act shall refer, more specifically, to 42 USC § 262, which governs the regulation of biological products.

1.83                         “ Post-Approval Clinical Trial ” means a clinical trial of a Product that is completed after receipt of Regulatory Approval of such Product and that is not required by the applicable Regulatory Authority as a condition to receiving such Regulatory Approval.  A Post-Approval Clinical Trial may include epidemiological studies, modeling and pharmacoeconomic studies, and investigator-sponsored clinical trials studying Product that are approved by the JSC and that otherwise fit the foregoing definition.

1.84                         “ Product(s) ” means any and all  biological products [***] (and [***] ) incorporating a Biological Entity [***] , including each of the following Biosimilars:  (a) Momenta’s development compound referred to as “M834”, a fusion protein for which abatacept (the product known as Orencia®) is the reference brand biologic; (b) Momenta’s development compound referred to as [***] , a [***] for which [***] (the product known as [***] ) is the reference brand biologic; (c) Momenta’s development compound referred to as [***] , a [***] for which [***] (the product known as [***] is the reference brand biologic; (d) Momenta’s development compound referred to as [***] , a [***] for which [***] (the product known as [***] is the reference brand biologic; (e) Momenta’s development compound referred to as [***] , a [***] for which [***] (the product known as [***] is the reference brand biologic; and (f) Momenta’s development compound referred to as [***] , a [***] for which [***] (the product known as [***] or [***] ) is the reference brand biologic.  At any time prior to the applicable Continuation Decision, each Product shall be eligible for substitution in accordance with Section 2.6(b).

1.85                         “ Product Work Plan ” means, with respect to a Product, the Product-specific plan, developed by the applicable Sub-Committee and approved by the JSC, outlining the Development, Manufacturing and Commercialization (including the pursuit of Regulatory Approval) of such Product in the Territory, including a Commercialization Plan developed by Mylan and reviewed (but not approved, except for the Commercialization Budget) by the JSC and other information as provided in Section 2.1(b) .

1.86                         “ Profits (Losses) ” means, with respect to a Product and a Calendar Quarter, the Net Sales for such Product: (a) less Shared Other Expenses; and (b) plus Sublicense Revenue.

1.87                         “ Profit Share ” means Profits (Losses) multiplied by the Profit Share Percentage.

1.88                         “ Profit Share Percentage ” means, with respect to each Party, fifty percent (50%), subject to adjustments made pursuant to Section 2.4(f)(v), if any.

1.89                         “ Reference Product ” means the reference brand biologic product for each Product, which as of the Effective Date are: (a) with respect to Momenta’s development compound referred to as “M834”, the fusion protein abatacept, as marketed and manufactured by or on behalf of Abatacept Innovator as Orencia®; (b) with respect to Momenta’s development compound referred to as [***] , the [***] as marketed and manufactured by or on behalf of [***]

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

17

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Innovator as [***] ; (c) with respect to Momenta’s development compound referred to as [***] , the [***] as marketed and manufactured by or on behalf of [***] Innovator as [***] ; (d) with respect to Momenta’s development compound referred to as [***] , the [***] as marketed and manufactured by or on behalf of [***] Innovator as [***] ; (e) with respect to Momenta’s development compound referred to as [***] , the [***] as marketed and manufactured by or on behalf of [***] Innovator as [***] ; and (f) with respect to Momenta’s development compound referred to as [***] , the [***] manufactured and marketed by or on behalf of [***] Innovator as [***] or [***] .

1.90                         “ Regulatory Approval ” means, with respect to a country, all approvals, licenses, registrations, and regulatory authorizations required to make, store, import, transport, market and sell a Product in such country as granted by the relevant Regulatory Authority, including any such pricing, labeling or reimbursement approvals.

1.91                         “ Regulatory Authority ” means the FDA or any other counterpart or applicable government authority, court, tribunal, arbitrator, agency, legislative body, commission or other instrumentality of: (a) any national government of any country or territory or (b) any supranational body, in each case in the Territory that is responsible for granting applicable Regulatory Approvals.

1.92                         “ Regulatory Submission ” means any application to a Regulatory Authority seeking (a) approval to administer an investigational Product to humans, including INDs, or (b) Regulatory Approval.

1.93                         “ Shared Other Expenses ” means, for each Product, the Commercialization Expenses, Excess Further Expenses, COGS, Legal Expenses (subject to Article 5 ), Sublicense Expenses, and Third Party Intellectual Property Payment associated with such Product.

1.94                         “ Sublicense Expenses ” all amounts paid by a Party or its Affiliate to a Third Party Sublicensee pursuant to an agreement granting such Third Party a Sublicense, in consideration for the exercise of such Sublicense.

1.95                         “ Sublicense Revenue ” means all consideration received by a Party or its Affiliates with respect to a sublicense granted to a Third Party(ies) to Develop, Manufacture or Commercialize any Product in the relevant country in the Territory (such a grant, a “ Sublicense ” and such Third Party, a “ Sublicensee ”), but excluding: (a) consideration received by such Party or its Affiliates as payments for [***] for [***] or [***] undertaken by such Party or its Affiliates for, or in collaboration with, such Third Party(ies) or their Affiliates, which costs [***] the other Party pursuant to the [***] ; (b) consideration received by such Party or its Affiliates from such Third Party(ies) or their Affiliates as the [***] for such Party’s or any of its Affiliates’ [***] or [***] , except that consideration that [***] the [***] of [***] or [***] shall not be so excluded; (c) consideration paid by such Third Party(ies) to such Party or its Affiliates for [***] of such Product, which shall be [***] ; (d) any [***] of [***] or [***] , including with respect to costs associated with the [***] of [***] or [***] ; and (e) amounts received in consideration for the [***] of such Party or Affiliate, or [***] or [***] of the [***] of such Party or Affiliates related to this Agreement (whether by [***] or [***] or otherwise).

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

18

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

1.96                         “ Territory ” means with respect to the Products, the world.

1.97                         “ Third Party ” means any Person other than Momenta or Mylan or any Affiliate of either Party.

1.98                         “ Third Party Intellectual Property Payments ” means, with respect to a Product in the relevant country in the Territory, any royalties, license fees, maintenance fees or other monetary payments made by a Party or its Affiliates to any Third Party in consideration of a license(s), obtained after the Effective Date, under Patent Rights or Know-How or other intellectual property rights that are owned or controlled by such Third Party when such license is [***] the [***] or otherwise determined [***] to be necessary to Develop, Manufacture or Commercialize such Product without infringing such Third Party Patent Rights, Know-How or other intellectual property rights.

1.99                         “ United States ” or “ U.S. ” means the United States of America, and its territories, districts and possessions.

1.100                  “[***] Innovator” means [***] and its Affiliates, or any successor in interest thereto with respect to [***] , and Persons acting under authority thereof or in collaboration therewith, whether by contract, pursuant to a joint venture or otherwise.

1.101                  “Valid Claim” means: (a) a claim in issued Patent Rights that has not: (i) expired or been canceled; (ii) been declared invalid by an unreversed and unappealable (or unappealed) decision of a court or other appropriate body of competent jurisdiction; (iii) been admitted to be invalid or unenforceable through reissue, disclaimer or otherwise; or (iv) been abandoned by mutual written agreement of the Parties; or (b) a claim under an application for Patent Rights that has not been canceled, withdrawn from consideration, finally determined to be unallowable by the applicable governmental authority or court for whatever reason (and from which no appeal is or can be taken), or abandoned.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

19

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

20

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

21

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

22

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

23

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

ARTICLE 2.
DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION OF THE PRODUCTS

From and after the Effective Date, the Parties intend and agree to [***] to Develop, Manufacture and Commercialize the Products as described in this Agreement and in accordance with the applicable Product Work Plan.

2.1                                Product Work Plans .

(a)                                  The initial Product Work Plan for each Product shall be prepared and approved by the JSC within [***] ( [***] ) [***] of the Effective Date of this Agreement. These initial Product Work Plans shall incorporate any remaining Initial Development Activities. Thereafter, the JSC shall review, update as appropriate and (other than with respect to the Commercialization Plan included therein except for the Commercialization Budget) approve Product Work Plans on at least an [***] basis and may modify Product Work Plans more frequently as may be deemed necessary by the Parties from time-to-time.  Each revised Product Work Plan for a Product shall contain substantially the level of detail and cover at least the same matters (as described in Section 2.1(b)  below, to the extent applicable based on the then-current stage of Development or Commercialization) as the initial Product Work Plan for such Product.  Momenta is authorized to perform the Development Activities (“ Initial Development Activities ”) and incur the Development Expenses associated therewith, in each case as set forth in Exhibit 2.1(a)(1)  hereto, following the Effective Date and prior to the time the initial Product Work Plan is approved. For clarity, the Product Work Plan for a Product will not include Commercialization Activities until the first Commercialization Plan for such Product is provided pursuant to Section 2.1(c)  below.

(b)                                  The Product Work Plan for each Product shall include, as appropriate: (i) specific objectives of the Collaboration during the applicable [***] ; (ii) the specific activities to be performed by each Party, or by Third Parties, in support of the Continuation Decision (as applicable), Development, Manufacturing and, subject to Section 2.1(c), Commercialization of the Product for the applicable [***] , and, if all planned Regulatory Approvals have not yet been obtained, in support of Regulatory Approval for such Product; (iii) the Development and regulatory strategy and plan for obtaining Regulatory Approval for such Product (“Regulatory Plan”); (iv) contemplated timelines associated with Development Activities, Manufacturing Activities and Commercialization Activities described in clause (ii), including contemplated timelines for applicable Development milestones, clinical trials, Legal Clearance Activities and Regulatory Submissions; (v) an [***] budget reflecting the resources (including FTEs for each Party) to be assigned and amounts anticipated to be expended by each Party in support of the Development, Manufacturing and Commercialization of the Product during the applicable [***] , along with a detailed [***] estimate of the resources and expenses for the [***] ( [***] ) [***] following the end of such [***] budget; and (vi) a rolling [***] ( [***] ) [***] financial plan, setting forth a high level overview of items (i)-(iv) above, as well as material assumptions underlying such financial plan and such other information requested by the JSC.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

24

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(c)                                   The initial Commercialization plan (the “ Commercialization Plan ”) for each Product will be prepared by [***] (in consultation with [***] through the [***] ) and provided to the JSC no later than [***] ( [***] ) [***] prior to the planned submission of the first application for Regulatory Approval for such Product in a Major Country as part of the Product Work Plan: (i) for review and [***] for Commercialization Activities, which [***] shall [***] ; and (ii) for review and [***] of the aggregate [***] budget for Commercialization Activities set forth in such Commercialization Plan during the applicable [***] (“Commercialization Budget”); and (iii) for review of an estimate of the aggregate [***] budget for the [***] ( [***] ) [***] following the period covered by such Commercialization Budget; provided that [***] obligation to provide such estimate shall be contingent upon [***] completion of its [***], which [***] shall [***] to complete in time to provide such estimate with the applicable Commercialization Plan. If [***] , is unable to provide such estimate with the applicable Commercialization Plan, [***] shall [***] to provide such estimate [***] . The Commercialization Plan shall: (A) contain the depth and detail that are [***] for similar products; and (B) reflect the Commercialization Activities intended to accomplish successful Commercialization of the Product in the applicable Major Country(ies) over the subsequent [***] ( [***] ) [***] after Launch.  [***] shall update the Commercialization Plan for each Product [***] after its initial submission and re-submit each such updated Commercialization Plan to the JSC: (1) for review and [***] for Commercialization Activities, which [***] shall [***] ; and (2) for review and [***] of the Commercialization Budget; and (3) for review of an estimate of the aggregate [***] budget for the [***] ( [***] ) [***] following the period covered by such Commercialization Budget.

2.2                                Development Responsibilities and Diligence.

(a)                                  Diligence .  Each Party will [***] to conduct the Development Activities (including all regulatory activities) assigned to it in the applicable Product Work Plan.  All such Development Activities shall be conducted in accordance with this Agreement, the applicable Product Work Plan and Applicable Law.  Momenta will be primarily responsible, in collaboration with Mylan, for managing execution, and contracting with Third Parties (other than Third Parties for supply of Product) for the conduct, of pre-clinical Development Activities, Initial Clinical Trials and Additional Clinical Trial(s) for M834 and for pre-clinical Development Activities and Initial Clinical Trials for the other Products. Mylan will be primarily responsible, in collaboration with Momenta, for managing execution, and contracting with Third Parties (other than Third Parties for supply of Product) for the conduct, of Additional Clinical Trial(s) of the Products (other than M834).  Notwithstanding the preceding allocations of responsibility, the Parties may, as appropriate and as mutually agreed, assign specific Development Activities to either Party.  Notwithstanding the foregoing allocation of responsibility for contracting with Third Parties, the Parties will cooperate with respect to the negotiation of such contracts with the goals of minimizing costs and maximizing quality, efficiency and effectiveness of such Third Party services.

(b)                                  Additional Development Activities .  If a Party (the “ Proposing Party ”) wishes to conduct Development Activities that are not covered by an approved Product Work Plan (“ Additional Development Activities ”), then the Proposing Party shall provide the JSC with a proposal for such Additional Development Activities, including a description of, and

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

25

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

rationale for, the activities, timelines for the activities and a projected budget for such activities, for review and approval, and shall incorporate reasonable comments from the JSC.  If the JSC approves such Additional Development Activities, then such Additional Development Activities shall be incorporated into the existing Product Work Plan (thereby becoming Development Activities), and the costs of such Additional Development Activities [***] as Development Expenses pursuant to Section 4.2(a)(i).

(c)                                   Regulatory .  Unless otherwise determined by the JSC or as set forth in the applicable Product Work Plan: (i) Mylan shall be responsible for preparing and filing the initial IND for each Product outside the United States, which shall be subject to review and approval by [***] , and which shall be submitted to the applicable Regulatory Authorities in [***] or its Affiliate’s name; (ii) Momenta shall be responsible for preparing and filing the initial IND for each Product in the United States, which shall be subject to review and approval by [***] , and which shall be submitted to the FDA and other Regulatory Authorities in [***] or its Affiliate’s name; (iii) the Parties shall cooperate in the preparation of all applications for Regulatory Approvals for the Products in accordance with the Product Work Plans; (iv) all applications for Regulatory Approvals and other Regulatory Submissions outside the U.S. for the Product shall be filed in Mylan or its Affiliate’s name; and (v) all applications for Regulatory Approvals and other Regulatory Submissions in the U.S. for the Product shall be filed in Momenta or its Affiliate’s name; except that, [***] during the Term as part of the Collaboration, Momenta shall [***] to [***] or [***] and [***] or [***] of [***] and [***] .  Unless otherwise determined by the JSC or as set forth in the applicable Product Work Plan: (A) Mylan shall be primarily responsible for correspondence and interactions with Regulatory Authorities with respect to the Products in the Territory outside the United States; and (B) Momenta shall be primarily responsible for correspondence and interactions with Regulatory Authorities with respect to the Products in the United States until [***] to [***] or [***] of [***] for a Product, after which [***] shall be primarily responsible for such correspondence and interactions with respect to such Product.  All Regulatory Submissions shall be subject to review and approval by both Parties.  Each Party shall provide the other Party with copies of all material correspondence with Regulatory Authorities with respect to the Products.  Appropriate individuals from each Party will be invited as meeting participants and have the right to attend and participate in any meetings with Regulatory Authorities in the Territory with respect to the Products.  The foregoing activities shall be described in more detail in the Regulatory Plan.

(d)                                  Clinical Trial Protocols.  All protocols for Clinical Development of the Products to be conducted pursuant to the Collaboration shall be subject to review and approval by the JSC.  Upon the request of either Party, the Parties shall negotiate in good faith one or more pharmacovigilance agreements to govern safety data exchange and reporting with respect to any such Clinical Development of the Products.

(e)                                   Development Activity Reports .  Each Party will report on Development Activities undertaken by it in performance of the Product Work Plan.  Such reports shall be provided in connection with meetings of the JSC and as otherwise reasonably requested by the other Party.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

26

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(f)                                    Data Access .  Without limiting the reporting obligations set forth in Section 2.2(e)  above, each Party shall provide the other Party with access to [***] Development data, including but not limited to CMC, pre-clinical, clinical and manufacturing data, reports, records and materials (including cell lines) related to the Products within its and its Affiliates’ Control, [***] to [***] or [***] to the [***] , including but not limited to source data and [***] of, or (if requested by a Party in writing) right of reference to, any regulatory filings made by the other Party with respect to the Products, as reasonably necessary for the Development, Manufacture and Commercialization of the Products in accordance with this Agreement.  After receipt of a Party’s written request, the other Party shall promptly submit and file with the applicable Regulatory Authority any and all documents reasonably necessary to grant the requesting Party such rights of reference.  For clarity, all such data, reports, records and materials produced by or on behalf of a Party or its Affiliates shall be included in the such Party’s Know-How and subject to the rights and licenses granted to the other Party in Section 6.1 or Section 6.2, if any.

2.3                                Manufacturing Responsibilities and Diligenc e

(a)                                  Diligence .  Each Party shall [***] to conduct the Manufacturing Activities assigned to it under the applicable Product Work Plan.  All such Manufacturing Activities shall be conducted in accordance with this Agreement, the applicable Product Work Plan and Applicable Law. Momenta will be primarily responsible for entering into contracts with Third Parties for clinical supply of the Products and Mylan will be primarily responsible for entering into contracts with Third Parties for Commercial Supply of the Products (except M834). Notwithstanding the preceding allocations of responsibility, the Parties may, as appropriate and as mutually agreed, assign specific Manufacturing responsibilities to either Party. Notwithstanding the foregoing allocation of responsibility for contracting with Third Parties, the Parties will cooperate with respect to the negotiation of such contracts with the goals of minimizing costs and maximizing quality, efficiency and effectiveness of such Third Party manufacturing.

(b)                                  The Party that bears primary responsibility for Manufacturing Activities for a Product, as set forth in the Product Work Plan, shall [***] to ensure adequate supply of pre-clinical and clinical supply of Product (including the bulk process intermediate and finished Product) to Develop such Product as contemplated by the Product Work Plan, and shall [***] to ensure adequate Manufacturing capacity to meet forecasted commercial demand for such Product.

(c)                                   Third Party Manufacturers.   If a Party uses any Third Party to fulfill its Manufacturing obligations under this Agreement, the Third Party and the terms of the agreement with such Third Party must be reasonably acceptable to the [***] , which shall be responsible for selecting such Third Party manufacturer.  Each Party shall have the right to conduct quality inspection(s) of each Third Party manufacturer of the Products or any component of the Products for use in the clinical trials included in the Product Work Plans or with respect to commercial supply, and a Party may withhold or withdraw its approval of such Third Party manufacturers in the event any such inspection reveals material quality issues.  The Parties shall cooperate with respect to the transfer of the manufacturing process for each Product as may be reasonably

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

27

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

necessary to enable each such approved Third Party manufacturer to manufacture the applicable Product(s).

(d)                                  Manufacturing Activity Reports.  Each Party will report on Manufacturing Activities undertaken by or on behalf of it in performance of the Product Work Plan.  Such reports shall be provided in connection with each meeting of the JSC and as otherwise reasonably requested by the other Party.  The reports provided by each Party pursuant to this Section 2.3(d)  shall include, as applicable, updates regarding the development of the manufacturing processes for the Products, any manufacturing issues that arise in the conduct of the Product Work Plans, and progress reports with respect to any corrective actions being taken with respect to the manufacture of the Products.

(e)                                   Transfer of Manufacturing Process .  Upon a Party’s request, and otherwise in accordance with the applicable Product Work Plan, the other Party shall cooperate with such request to transfer any manufacturing processes for the Products (including cell lines and drug substance) developed by or on behalf of the transferring Party to the other Party or its designee for purposes of Developing and Commercializing the Products in accordance with this Agreement.

2.4                                Commercialization Responsibilities and Diligence

(a)                                  Diligence . The Commercialization Plan shall consist of commercially reasonable Commercialization Activities consistent with those undertaken by [***] with respect to products of similar market potential at a similar stage of commercialization in their product life cycle to successfully launch and commercialize such Products, taking into account scientific, technical, regulatory and commercial factors such as the product profile (including safety and efficacy), competiveness of the marketplace, cost, profitability, regulatory approvals (including pricing approvals), the patent and other intellectual property position of the Product, and the regulatory requirements and condition involved. Each Party shall [***] to conduct the Commercialization Activities assigned to it in the applicable Product Work Plan.  All such Commercialization Activities shall be conducted in accordance with this Agreement, the applicable Product Work Plan and Applicable Law.  Mylan will lead the global Commercialization efforts with respect to the Products in the Territory.  Mylan shall [***] to Launch each Product within each Major Country promptly after: (i) obtaining Regulatory Approval for such Product within such Major Country; (ii) any waiting periods required by Applicable Law have expired; and (iii) subject to Section 2.4(f), Legal Clearance Activities have been completed to the Parties’ mutual satisfaction; provided that [***] and [***] of [***] Product is available.

(b)                                  Mylan Responsibilities .  Except as specifically provided otherwise in the applicable Product Work Plan, Mylan shall, with respect to each Product, [***] to undertake, and have the right to [***] with respect to the following activities, in each case in performance of the applicable Commercialization Plan:

(i)                                      sales and marketing strategy;

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

28

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(ii)                                   the design, creation and implementation of patient support programs and services;

(iii)                                selling and marketing;

(iv)                               setting pricing terms and conditions; and

(v)                                  Product recalls and all interactions and correspondence with Regulatory Authorities associated with such Product recalls and other aspects of the Commercialization Plan,

except that Mylan’s right to Launch the Products shall be subject to Section 2.4(f) .

(c)                                   Commercial Information Reports.   Within [***] ( [***] ) [***] after the Effective Date and updated regularly, as appropriate, the Parties shall share with each other material market information collected or prepared by or on behalf of such Party relating to each Product, including: (i) any information relating to [***] and [***] ; (ii) projected [***] revenue through [***] ; and (iii) market research, including physician, patient and payer data; and (vi) other information relevant to the commercial opportunity of a Product.

(d)                                  Commercialization Activity Reports .  Each Party will report on the Commercialization activities undertaken by it in performance of the applicable Product Work Plan in connection with each meeting of the JSC, including Product sales to date for the applicable year.  In addition, commencing no later than the First Commercial Sale of a Product, each Party will, on a Product-by-Product and a country-by-country basis, no more frequently than [***] (unless otherwise agreed by the Parties), provide to the other Party upon request, activity reports reflecting sales volume data and key factors and variables affecting [***] and sales for the [***] , such as changes in the [***] and [***] and [***] .

(e)                                   Product Recalls .  Each Party shall promptly notify the other Party of any information received by it that could reasonably form the basis for a recall, market withdrawal or other corrective action of a Product, in sufficient detail to allow the Parties to comply with any and all Applicable Law to the extent such level of detail is available to the reporting Party.  Each Party shall promptly notify the other Party of any material actions to be taken with respect to any recall or market withdrawal or other corrective action related to a Product prior to such action to permit each Party a reasonable opportunity to consult with the other Party with respect thereto.  All costs and expenses incurred by the Parties and not reimbursed by a Third Party, with respect to a recall, market withdrawal or other corrective action with respect to the Products shall be Commercialization Expenses, shared by the Parties in accordance with the Profit Share Percentage.  All final decisions with respect to any recall, market withdrawals or any other corrective action related to the Product in the Territory shall be made by Mylan as the Regulatory Approval holder, except that liability of a Party to a Third Party associated with any such recall, market withdrawals or any other corrective action will be addressed under Article 8.  Each Party will keep the other Party reasonably informed with respect to any recalls, market withdrawals or other corrective action with respect to the Products in the Territory and will consider any comments from such other Party with respect thereto in good faith.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

29

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(f)                                    Legal Clearance and Launch .

(i)                                      The Parties agree that Mylan may [***] Launch (on a country-by-country basis) any Product without obtaining Momenta’s prior consent after the Product has obtained Final Legal Clearance in such country.  Prior to the Product obtaining Final Legal Clearance in any country, Mylan may [***] Launch such Product in such country without obtaining Momenta’s prior consent solely by following the process described in subsections (ii) — (v) of this Section 2.4(f).

(ii)                                   Relevant Patents.

(1)                                  At least [***] ( [***] ) [***] prior to the anticipated Launch of a Product in a country as indicated in the most recent Commercialization Plan (“ Anticipated Launch Date ”), [***] shall meet and discuss any Patent Rights of the Innovator covering the applicable Reference Product and any Patent Rights of a Third Party patent owner or exclusive licensee of a Biosimilar that is a Competing Product of such Product in such country, in each case that may be potentially infringed by the composition, manufacture, use, marketing, importation or sale of the Product.

(2)                                  Any such Patent Rights identified by Momenta, [***] , to Mylan by written notice at least [***] ( [***] ) [***] prior to the Anticipated Launch Date [***] based on the [***] of such Product shall be referred to as “Identified Patent Rights”.

(3)                                  Momenta may update the Identified Patent Rights, by providing written notice of such update to Mylan, at any time that is at least [***] ( [***] ) [***] prior to the Anticipated Launch Date solely to add any other Patent Rights that have issued or been licensed to the Innovator or such a Third Party patent owner or exclusive licensee of a Biosimilar that is a Competing Product of such Product in the applicable country, which raise, [***] , a [***] based on the [***] of such Product; provided that such Patent Rights issue or were licensed to the Innovator or such a Third Party patent owner or exclusive licensee of a Biosimilar that is a Competing Product of such Product in the applicable country (A) on or after [***] ( [***] ) [***] prior to the Anticipated Launch Date and before such [***] ( [***] ) [***] notice date, or (B) prior to such [***] ( [***] ) [***] date if such issuance or license occurs or only became publicly known (or, if earlier, actually known to [***] ) [***] ( [***] ) [***] or less prior to such [***] ( [***] ) [***] date (any such Identified Patent Rights added pursuant to this Section 2.4(f)(ii)(3)  may also be referred to herein as, “Additional Identified Patent Rights”).

(iii)                                Beginning no earlier than [***] ( [***] ) [***] prior to the Anticipated Launch Date, on a country-by-country basis, if Mylan desires to Launch a Product in such country before such Product has obtained Final Legal Clearance in such country, then Mylan shall so notify Momenta in writing, and, along with such notice, Mylan shall provide Momenta with Mylan’s analysis and [***] assessment of such Launch in such country, including its [***] under Section  [***] , and [***] shall discuss the analysis and [***] assessment.  Within [***] ( [***] ) [***] of receipt of such notice and assessment from Mylan, Momenta shall notify Mylan if Momenta consents to the Launch of such Product in such country.  Such consent shall be subject to revision solely by a written notice provided by Momenta to Mylan together with,

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

30

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

and as a result of, an update to the Identified Patent Rights made by Momenta pursuant to Section 2.4(f)(ii)(3), pursuant to which revision Momenta may withdraw its consent to the Launch of such Product in such country solely based on any Additional Identified Patent Rights, and such Additional Identified Patent Rights shall be the only ARL Identified Patents with respect to such Product in such country (such a revision, a “Consent Revision”).

(iv)                               If Momenta either consents to the Launch of such Product in such country, or if Momenta does not notify Mylan of Momenta’s consent within [***] ( [***] ) [***] of Momenta’s receipt of such notice and assessment from Mylan, then Mylan may Launch such Product in such country and the Profit Share Percentage with respect to such Product shall remain unchanged, unless Momenta revokes such consent in writing pursuant to a Consent Revision made in accordance with the last sentence of Section 2.4(f)(iii).

(v)                                  If Momenta (A) notifies Mylan that Momenta does not consent to the Launch of such Product in such country within [***] ( [***] ) [***] of Momenta’s receipt of such notice and assessment from Mylan or (B) subsequently withdraws its consent to the Launch of such Product in such country pursuant to a Consent Revision made in accordance with the last sentence of Section 2.4(f)(iii), then Mylan may Launch such Product in such country; provided, however, that if Mylan Launches such Product in such country, then notwithstanding anything to the contrary herein, the following shall apply:

(1)                                  The Profit Share Percentage of Mylan for such Product in such country will automatically and immediately increase to [***] percent ( [***] %), and the Profit Share Percentage of Momenta for such Product in such country will automatically and immediately decrease to [***] percent ( [***] %), in each case during the period between the Launch of such Product in such country and the Final Legal Clearance of such Product in such country.  After the Final Legal Clearance of such Product in such country has been obtained, the Profit Share Percentage of Mylan and Momenta for such Product in such country will automatically and immediately each revert to fifty percent (50%), subject to paragraph 5 below.

(2)                                  In consideration for the decrease in the Profit Share Percentage of Momenta described in Section 2.4(f)(v)(1), Momenta’s liability to Third Parties for infringement related to the Launch and Commercialization of such Product in such country during the period between the Launch of such Product and the Final Legal Clearance of such Product will be automatically and immediately limited as follows in subsections (3) — (4).

(3)                                  As part of Momenta’s notifications (including any Consent Revision) described in Section 2.4(f)(v) (or any notification of Additional Identified Patent Rights pursuant to Section 2.4(f)(ii)(3)), Momenta shall identify in writing a list (or an updated list to add any such Additional Identified Patent Rights if an update notice is given solely in connection with and as a result of an update notification by Momenta pursuant to Section 2.4(f)(ii)(3)) of the Patent Rights within the Identified Patent Rights upon which Momenta has based its determination not to consent to Launch; provided that such list may not include any Patent Rights with respect to which either Party has been [***] based on such Product [***] Momenta’s notification of such Identified Patent Right pursuant to Section 2.4(f)(ii) unless Momenta provides notification of such Patent Rights as Identified Patent Rights no later than

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

31

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

[***] ( [***] ) [***] of Momenta receiving service of such [***] or notification from Mylan that Mylan has been [***] (such list, the “ARL Identified Patents”).

(4)                                  Mylan agrees to defend Momenta and its Affiliates, and their respective agents, directors, officers and employees (the “Momenta Indemnitees”), at Mylan’s cost and expense, and will indemnify and hold harmless the Momenta Indemnitees from and against any and all ARL Losses Momenta Indemnitees incur.  “ARL Losses” means all Legal Expenses and Losses arising or resulting from any Claims against a Momenta Indemnitee or Mylan or its Affiliates or their respective agents, directors, officers and employees brought after Mylan’s receipt of Momenta’s notice in accordance with Section 2.4(f)(ii) and arising or resulting from [***] , or [***] , of the [***] with respect to the Launch or Commercialization of the Product in such country during the period between the Launch and the Final Legal Clearance of such Product, in each case solely with respect to the [***] .  If any such Claim against any Momenta Indemnitee arises, Momenta shall promptly notify Mylan in writing of the Claim and Mylan shall manage and control, at its sole expense, the defense of the Claim and its settlement.  Notwithstanding the foregoing, no settlements of any such Claim shall be finalized without obtaining Momenta’s prior written consent, which shall not be unreasonably withheld, delayed or conditioned, except that in the case of a settlement that does not require an admission or action on the part of Momenta, and does not harm Momenta or its ability to comply with its obligations hereunder, Momenta’s consent shall not be required so long as Momenta is unconditionally released from all liability in such settlement, subject to reimbursement of [***] pursuant to Section 2.4(f)(v)(5) below.  Momenta shall cooperate with Mylan and may, at its discretion and expense, be represented in any such action or proceeding.  Mylan shall not be liable for any settlements, litigation costs or expenses incurred, or admissions made, by Momenta Indemnitees without Mylan’s written authorization.  For clarity, any Legal Expenses arising or resulting from infringement, or alleged infringement based on the Development, Manufacture or Commercialization of the Products, of Patent Rights other than the ARL Identified Patents shall not be subject to the indemnity set forth in this Section 2.4(f)(v)(4), and each Party shall be responsible for its Allocable Legal Expense Share of such Legal Expenses.

(5)                                  Following Final Legal Clearance with respect to the ARL Identified Patents, Momenta shall reimburse Mylan for [***] percent ( [***] %) of the [***] incurred by Mylan as set forth below in this Section 2.4(f)(v)(5).  Such reimbursement shall be made by Momenta to Mylan on a Product-by-Product and country-by-country basis through a set-off against Profits payable each Calendar Quarter to Momenta for such Product in such country beginning with the first Calendar Quarter (or portion thereof) following the achievement of Final Legal Clearance with respect to the ARL Identified Patents for such Product in such country.  Such set-off by Mylan shall not exceed (A)  [***] percent ( [***] %) of the Profits for such Product in such country otherwise payable to Momenta in the applicable Calendar Quarter until the amounts set-off by Mylan equal the amount of any Profits received by Momenta with respect to such Product prior to Final Legal Clearance and (B) thereafter, [***] percent ( [***] ) of the Profits for such Product in such country otherwise payable to Momenta in such Calendar Quarter.  An example calculation of reimbursement of [***] is set forth in Exhibit 2.4(f).

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

32

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

2.5                                Limitations on Final Decision Authority .  Notwithstanding the provisions of Section 2.4(b) , but without limiting Mylan’s rights described in Section 2.4(f) , Mylan shall not exercise its right to make final decisions to the extent it would: (a) require Momenta to breach an agreement with a Third Party pursuant to which Momenta has obtained any rights to any Know-How or Patent Rights covering the Product; (b) require Momenta to otherwise perform any act that Momenta reasonably believes to be inconsistent with any Applicable Law or the terms of this Agreement; (c) modify the [***] of any Product Work Plan; (d) impose a resolution on the Parties with respect to any dispute regarding the existence or amount of any payment to be made under this Agreement; (e) directly impose on Momenta an obligation to [***] or its [***] tangible or intangible [***] and [***] in a certain manner; or (f) amend, interpret, modify or waive compliance with this Agreement.

2.6                                Continuation Decisions and Product Substitutions .

(a)                                  Continuation Decisions .  For each Product (other than M834), each Party shall make a continuation decision as to whether to continue the Development, Manufacture and Commercialization of such Product pursuant to this Agreement as set forth in this Section 2.6 (each a “ Continuation Decision ”) following: (i) the selection of [***] for such Product, (ii) development of the Collaboration IP Plan by the JLC for such Product, (iii) development and submission to the JSC for approval of a Regulatory Plan by the JDRC that includes a detailed [***] for such Product; (iv) completion of adequate [***] to [***] of such Product [***] ; and (v) receipt of the JSC’s recommendation as to whether to continue Development, Manufacture and Commercialization of such Product pursuant to this Agreement.  The applicable Sub-Committees shall provide the JSC with the following information for such Product (other than M834) to enable the JSC to make its recommendation regarding the Continuation Decision: an updated Product Work Plan, including an overview of the Commercialization strategy and preliminary sales forecasts for such Products prepared by [***] , an updated review of the applicable Product market in the Territory and the [***] of the Product in the Territory [***] ; legal review of the patent landscape and litigation strategy; regulatory review of Clinical Development requirements and strategy to meet such requirements; estimated development costs to approval; and any other information the JSC deems useful in making its recommendation regarding a Continuation Decision. After receipt of such supporting information, the JSC will meet and make a recommendation with respect to each such Continuation Decision.  Each Party shall notify the other Party in writing within [***] ( [***] ) [***] after such JSC meeting of the notifying Party’s decision to either continue or not to continue the Development, Manufacture and Commercialization of the applicable Product (other than M834) under the Collaboration.  Notwithstanding anything to the contrary herein, unless otherwise agreed by the Parties in advance in writing, each Party shall notify the other of its Continuation Decision prior to either Party making, or being required to make, any contractual commitments to incur or incurring costs or fees for [***] or [***] for such Product.

(1)                                  If Mylan and Momenta each decide to continue with the Development, Manufacture and Commercialization of a given Product (other than M834) under the Collaboration, then Mylan shall make the applicable Continuation Payment for such Product

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

33

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

to Momenta pursuant to Section 4.1(b) , and the applicable Product Work Plan shall be updated by the JSC as appropriate to reflect such decision.

(2)                                  If Mylan decides to continue with the Development, Manufacture and Commercialization of a given Product (other than M834) under the Collaboration, but Momenta decides not to continue with the Development, Manufacture and Commercialization of such Product (other than M834) under the Collaboration, then Momenta shall terminate (and such decision by Momenta shall be deemed a termination of) its rights under this Collaboration with respect to such Product (other than M834) pursuant to Section 10.2(a).

(3)                                  If Mylan decides not to continue with the Development, Manufacture and Commercialization of a given Product (other than M834) under the Collaboration, but Momenta decides to continue with the Development, Manufacture and Commercialization of such Product under the Collaboration, then Mylan shall terminate (and such decision by Mylan shall be deemed a termination of) its rights under this Collaboration with respect to such Product (other than M834) pursuant to Section 10.2(a).

(4)                                  If Mylan and Momenta each decide not to continue with the Development, Manufacture and Commercialization of a given Product (other than M834) under the Collaboration, the Agreement shall terminate with respect to such Product, neither Section 10.6(a) nor Section 10.6(b)  shall be applicable and each Party shall retain its joint ownership interest of Collaboration Intellectual Property and shall have the right to exploit such Collaboration Intellectual Property on a non-exclusive basis.

(b)                                  Product Substitutions .  Prior to the Continuation Decision with respect to each Product (“ Substituted Product ”), either Party may propose to the other Party that a different Biosimilar or a Complex Generic Product (“ Replacement Product ”) be substituted for such Product, and a meeting of the Parties shall be held within [***] ( [***] ) [***] of such request to determine whether to make such substitution.  If the Parties (in their sole discretion) agree in writing to such substitution, then the Parties shall [***] the [***] terms under which such Replacement Product shall become a Product and the active ingredient of such Product shall become a Biological Entity for all purposes of this Agreement.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

34

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

2.7                                Momenta’s Co-Commercialization Option.

(a)                                  In General .  On a Product-by-Product basis, Mylan hereby grants to Momenta an option (each, a “ Co-Commercialization Option ”) to play a supporting commercial role for such Product in the United States, by performing such activities in support of Mylan’s Commercialization of the Product as determined by the JSC, in accordance with this Agreement, the applicable Commercialization Plan and a separate co-Commercialization agreement (the “ Co-Commercialization Agreement ”) to be negotiated [***] by the Parties within [***] ( [***] ) [***] subsequent to Momenta’s exercise of the Co-Commercialization Option with respect to a particular Product.  If any inconsistency arises between the terms of this Agreement and the terms of a Co-Commercialization Agreement, the terms of this Agreement shall prevail.

(b)                                  Exercise .  Mylan shall give Momenta written notice (the “ Co-Commercialization Notice ”) at least [***] ( [***] ) [***] before the planned submission of the first BLA for each Product in the U.S. as set forth in the then-current Product Work Plan, and shall provide with such notice: (i) the anticipated date of First Commercial Sale of the Product in the U.S.; and (ii) the then-current Commercialization Plan for the U.S., including budgets relating to the Commercialization activities set forth under such plan.  Momenta may exercise its Co-Commercialization Option with respect to such Product by written notice to Mylan no later than [***] ( [***] ) [***] after Momenta receives a Co-Commercialization Notice.  The Parties shall continue to share Profits (Losses) in accordance with Section 4.2 with respect to each Product, regardless of whether Momenta exercises or does not exercise its Co-Commercialization Option with respect to any Product.  Momenta shall not have the right to Commercialize any Product, unless and until a Co-Commercialization Agreement, which permits the Commercialization of such Product in the U.S., is entered into by the Parties.  For clarity, Momenta’s role under a Co-Commercialization Agreement may include various [***] activities (e.g., supplying [***] ), or [***] and [***] activities, in each case in support of Mylan’s Commercialization of the Products [***] for each such Product, as described in Section 5.11.

ARTICLE 3.
GOVERNANCE

From and after the Effective Date, the Parties intend that the Development, Manufacturing and Commercialization Activities and associated Legal Activities and decisions for each Product be conducted and managed using [***] and subject to the oversight of the Joint Steering Committee, and any relevant Sub-Committees or working groups.

3.1                                Generally .  The Parties hereby establish a joint steering committee (“ Joint Steering Committee ” or “ JSC ”) composed of senior members from each Party, including one (1) Alliance Manager (as defined in Section 3.7(a) ), to oversee the Development, Manufacturing and Commercialization of all Products under this Agreement.  The structure, scope of responsibility and authority of the JSC shall be as set forth in this Article 3 .

3.2                                Structure .  The JSC shall initially consist of four (4) representatives, one of which shall be an Alliance Manager as provided in Section 3.7 below, from each of Mylan and Momenta.  Each of the representatives shall be of the seniority and experience appropriate for

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

35

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

service on the JSC in light of the functions, responsibilities and authority of the JSC and the status of the Development, Manufacture and Commercialization of the Products subject to the Agreement from time to time.  The JSC shall appoint a chairperson from among its members, which shall initially be a representative from Momenta, and then alternate annually between the Parties.  The chairperson shall be responsible for notifying the Parties’ representatives of JSC meetings and for leading the meetings.  The initial JSC representatives of each Party (other than the Alliance Managers) are set forth on Exhibit 3.2 .  Each Party may replace its representatives by providing written notice to the other Party.  Employees and other representatives of each Party that are not members of the JSC may attend meetings of the JSC and any Sub-Committees (as defined below) as requested by members of the JSC, and subject to the approval of the other Party with respect to non-employee representatives, to further the activities contemplated by this Agreement.

3.3                                Time and Location of Meetings .  The JSC shall meet at such times and places, in person or by telephone conferencing, web-conferencing, video conferencing or other electronic communication, as the JSC shall determine to carry out its responsibilities; provided, however, that the initial meeting of the JSC shall be held in person at such location as mutually agreed upon by the Parties no later than [***] ( [***] ) [***] after the Effective Date.  Thereafter, the JSC shall meet in person at least two (2) times each Calendar Year and shall hold regular teleconferences between meetings not less frequently than once during each Calendar Quarter in which no in person meeting of the JSC is held.  A Party may also call a special meeting of the JSC by providing at least [***] ( [***] ) [***] prior written notice to the other Party if such Party reasonably believes that a matter within the JSC’s authority must be addressed prior to the next scheduled meeting, in which event such Party shall provide the other Party a proposed agenda, together with such meeting request.  The location of the in-person meetings shall alternate between the sites of the two (2) Parties.  If a representative of a Party cannot attend a meeting, such Party may designate an alternate employee of such Party to attend such meeting in place of the absent representative.

3.4                                Minutes .  The JSC shall designate for each meeting one (1) Alliance Manager who shall be responsible for drafting and issuing minutes of each JSC meeting reflecting all material items discussed and any agreements of the JSC, which minutes shall be distributed to all JSC members for review and approval.  Such minutes shall provide a description in reasonable detail of the discussions held at the meeting and a list of any actions, decisions or determinations approved by the JSC.  The Parties shall endeavor to finalize and approve the minutes of each JSC meeting within [***] ( [***] ) [***] after each such meeting.  Approval of minutes shall be indicated by signature by one (1) JSC member from each Party.  Final minutes of each meeting shall be distributed to the members of the JSC by the chairperson.

3.5                                Sub-Committees .  The JSC shall agree upon the formation of certain sub-committees (each a “ Sub-Committee ”), each with an equal number of representatives from Mylan and Momenta, to address specific issues in greater detail, including (as described below) a Development and regulatory Sub-Committee, a Manufacturing Sub-Committee, a finance Sub-Committee, a Commercialization Sub-Committee, and a Sub-Committee for Legal Activities and intellectual property.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

36

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.6                                Scope of Authority; Responsibilities .

(a)                                  The JSC shall perform the functions and assume the responsibilities and have such authority as set forth in this Agreement.  The JSC has the right to establish a joint project team to implement cross-functional aspects of the Product Work Plan, or other team that the JSC deems necessary, and the JSC shall have such other responsibilities as the Parties may agree in writing from time to time.

(b)                                  The JSC’s responsibilities shall be: (i) overseeing the Collaboration; (ii) reviewing and approving the Product Work Plan for each Product no less than once per Calendar Year, as well as any amendments thereto, including the budget(s) and any clinical trial protocols included therein; provided that the JSC’s responsibilities with respect to the Commercialization Plan shall be to: (A) review and [***] the Commercialization Plan with respect to Commercialization Activities (other than the [***] ) and (B) review, [***] and [***] the [***] ; (iii) reviewing and commenting on Regulatory Submissions for each Product (which shall be subject to approval by the Parties); (iv) reviewing all publications described in Section 7.6 , and review and approve a publications policy for such publications regarding the Products; (v) coordinating a strategy for [***] for each Product to the extent included in the Commercialization Plan; (vi) facilitating the exchange of Development Activities reports and Commercialization Activities reports and related information for each Product; (vii) making a recommendation as to whether to [***] and [***] of each Product (other than M834) pursuant to Section  [***] ; (viii) creating and revising Clinical Development strategy and coordinating the execution of that strategy for each Product as part of the Product Work Plan and approval clinical trial protocols to be conducted pursuant to such strategy; (ix) overseeing Product registration and regulatory strategy; (x) subject to Article 5, reviewing legal strategy for Legal Activities for each Product, and agreeing with respect to the appropriate course of action to obtain Legal Clearance Activities for each Product; (xi) reviewing Commercialization strategy for each Product; (xii) reviewing [***] and [***] for each Product; (xiii) reviewing Product demand forecasts; (xiv) overseeing supply matters for each Product, including the selection of Third Parties to perform Manufacturing Activities on behalf of a Party (and approval over the scope of activities to be contracted to such Third Parties), [***] and [***] and other [***] ; (xv) reviewing and recommending [***] to [***] and [***] with respect to a Product Work Plan; and (xvi) other matters expressly assigned to the JSC in this Agreement.

(c)                                   For the avoidance of doubt, the JSC shall have no authority to: (i) amend any of the terms of this Agreement, including by means of JSC minutes, Product Work Plans or otherwise; (ii) waive any rights that either Party may otherwise have pursuant to this Agreement or otherwise; (iii) allocate the ownership of any Patent Rights or rights to any Know-How or the Parties’ rights to apply for Patent Rights; (iv) interpret this Agreement, or determine whether or not a Party has met its diligence or other obligations under the Agreement or whether or not a breach of this Agreement has occurred; or (v) require a Party to allocate resources to the Development, Manufacture or Commercialization of the Products other than as set forth in the agreed upon Product Work Plan, or otherwise agreed by such Party in writing.  Notwithstanding the foregoing, the JSC may make recommendations to the Parties for amendment of this Agreement.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

37

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.7                                Alliance Managers .

(a)                                  Appointment .  Each of the Parties shall appoint a single individual to act as a single point of contact between the Parties to assure a successful Collaboration (each, an “ Alliance Manager ”).  Each Party may change its designated Alliance Manager from time to time upon written notice to the other Party.  Any Alliance Manager may designate a substitute to temporarily perform the functions of that Alliance Manager by written notice to the other Party.

(b)                                  Responsibilities .  The Alliance Managers shall be non-voting members of the JSC and each Sub-Committee and shall attend all JSC and Sub-Committee meetings and support the chairpersons of JSC and Sub-Committees in the discharge of their responsibilities, including by (i) preparing and circulating meeting agendas, (ii) keeping written minutes that reflect all decisions made and action items identified at such meetings, (iii) circulating such minutes to JSC members and integrating comments from the JSC members, and (iv) facilitating communications between the Parties.

3.8                                Decisions; Disputes .

(a)                                  Except as expressly set forth in Section 2.4(b) , with respect to matters for which the JSC has decision-making authority, the decisions of the JSC (including any Sub-Committee thereof) must be unanimous, with the representatives of Mylan having, collectively, one (1) vote and representatives of Momenta having, collectively, one (1) vote.

(b)                                  If, after using [***] to reach consensus, a dispute arises regarding matters within the scope of the decision-making authority of the JSC (other than any JSC disputes under Section 5.3(a)(iii), Section 5.4 or Section 5.5 ), a subsequent meeting of the JSC shall be held to attempt to resolve such dispute.  If the JSC fails to reach a unanimous decision on its resolution within [***] ( [***] ) [***] after the date when the dispute was presented to the JSC at such subsequent meeting, then, except as otherwise set forth in this Agreement, the matter shall be resolved pursuant to Section 12.11(a)  and, as necessary, Section 12.11(c) .  If a dispute arises regarding matters within the scope of responsibilities of the JSC under Section 5.3(a)(iii), Section 5.4 or Section 5.5 , then such disputes will not be resolved pursuant to Section 12.11 and will instead be addressed under Section 5.3(a)(iii), Section 5.4 or Section 5.5 (as applicable).

3.9                                Costs and Expenses .  Each Party shall be responsible for [***] and [***] incurred by its respective representatives in connection with attending the meetings and otherwise being part of the JSC and of the Sub-Committees.  For the avoidance of doubt, [***] and [***] or other [***] shall [***] .

3.10                         Term of the JSC and Sub-Committees .  The JSC and each Sub-Committee, as applicable, shall, unless otherwise mutually agreed by the Parties, continue with respect to each Product through the Term of the Agreement.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

38

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.11                         Development and Regulatory Sub-Committee

(a)                                  Membership . The Parties shall, as soon as practicable and, in any event, no later than [***] ( [***] ) [***] after the Effective Date, form a Development and regulatory Sub-Committee to develop and oversee execution of the plans for Development and regulatory affairs with respect to the Products (the “ JDRC ”).  The JDRC shall consist of three (3) representatives of Mylan and three (3) representatives of Momenta, or such other equal number of representatives from each Party as the Parties may agree in writing.  Each member of the JDRC will have knowledge and expertise in the Development of or regulatory requirements for products similar to the Products, and will have appropriate seniority within the applicable Party.  Subject to the foregoing, each Party may replace its representatives to the JDRC at any time upon written notice to the other Party (subject, however, to such replacement complying with the requirements of this Section 3.11(a) ).

(b)                                  Responsibilities of JDRC .  Subject to the terms of this Agreement, the JDRC shall have the following responsibilities:

(i)                                      to develop the portions of the Product Work Plans covering Development Activities and regulatory activities for each Product;

(ii)                                   to oversee the execution of the Development Activities and regulatory activities set forth in each JSC-approved Product Work Plan;

(iii)                                to coordinate and oversee regulatory matters with respect to the Development and Manufacture of Products, including the development and selection of the [***] ;

(iv)                               to provide a forum to discuss the Development Activities and regulatory activities hereunder, including any issues related thereto and potential remediation plans for such issues; and

(v)                                  to provide a forum to discuss Third Parties engaged or proposed to be engaged to perform Development Activities and regulatory activities on behalf of a Party and the activities to be performed by such Third Parties.

(c)                                   Meetings .  The JDRC shall meet at least four (4) times per year (or as otherwise agreed to by the Parties), and such meetings may be conducted in person, by videoconference or by teleconference.  [***] shall [***] in connection with its participation on the JDRC.  In addition, either Party may call a meeting of the JDRC at any time upon [***] ( [***] ) [***] notice.  Meetings of the JDRC will be effective only if at least one (1) representative of each Party is present at or participating in such meeting.

(d)                                  JDRC Authority .  Subject to Section 2.2(a) , the JDRC shall have decision-making authority with respect to how the day-to-day Development Activities and regulatory activities are being carried out pursuant to the Product Work Plans.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

39

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.12                         Manufacturing Sub-Committee.

(a)                                  Membership . The Parties shall, as soon as practicable and, in any event, no later than [***] ( [***] ) [***] after the Effective Date, form a Manufacturing Sub-Committee to develop and oversee execution of the plans for the Manufacture of the Products (the “ JMC ”).  The JMC shall consist of three (3) representatives of Mylan and three (3) representatives of Momenta, or such other equal number of representatives from each Party as the Parties may agree in writing.  Each member of the JMC will have knowledge and expertise in the Manufacturing requirements for products similar to the Products, and will have appropriate seniority within the applicable Party.  Subject to the foregoing, each Party may replace its representatives to the JMC at any time upon written notice to the other Party (subject, however, to such replacement complying with the requirements of this Section 3.12(a) ).

(b)                                  Responsibilities of JMC .  Subject to the terms of this Agreement, the JMC shall have the following responsibilities:

(i)                                      to develop the portions of the Product Work Plans covering Manufacturing Activities for each Product;

(ii)                                   to oversee the execution of the Manufacturing Activities set forth in each JSC-approved Product Work Plan;

(iii)                                to provide a forum to discuss the Manufacturing Activities hereunder, including supply and inventory planning for key raw materials, bulk drug substance and the Products, planning for inventory for Launch of Products, functional-level metrics, performance and potential opportunities for improvement, Third Party sourcing, and any upcoming transfers of Manufacturing location or facility for Products for the Territory;

(iv)                               to provide a forum to discuss any issues relating to the Manufacturing Activities hereunder and propose remediation plans to resolve such issues; and

(v)                                  to provide a forum to discuss Third Parties engaged or proposed to be engaged to perform Manufacturing Activities on behalf of a Party and the activities to be performed by such Third Parties.

(c)                                   Meetings . The JMC shall meet at least four (4) times per year (or as otherwise agreed to by the Parties), and such meetings may be conducted in person, by videoconference or by teleconference.  [***] shall [***] in connection with its participation on the JMC.  In addition, either Party may call a meeting of the JMC at any time upon [***] ( [***] ) [***] notice.  Meetings of the JMC will be effective only if at least one (1) representative of each Party is present at or participating in such meeting.

(d)                                  JMC Authority . Subject to Section 2.3(a) , the JMC shall have decision-making authority with respect to how the day-to-day Manufacturing Activities are being carried out pursuant to the Product Work Plans.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

40

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.13                         Finance Sub-Committee .

(a)                                  Membership . The Parties shall, as soon as practicable and, in any event, no later than [***] ( [***] ) [***] after the Effective Date, form a finance Sub-Committee to oversee expenses and Profits (Losses) associated with the Development, Manufacture and Commercialization of the Products, and the sharing thereof (the “ JFC ”).  The JFC shall consist of two (2) representatives of Mylan and two (2) representatives of Momenta, or such other equal number of representatives from each Party as the Parties may agree in writing.  Each member of the JFC will have knowledge and expertise in financial matters for products similar to the Products, and will have appropriate seniority within the applicable Party.  Subject to the foregoing, each Party may replace its representatives to the JFC at any time upon written notice to the other Party (subject, however, to such replacement complying with the requirements of this Section 3.13(a) ).

(b)                                  Responsibilities of JFC .  Subject to the terms of this Agreement, the JFC shall have the following responsibilities:

(i)                                      to develop, and oversee the Parties execution of the Product Work Plans against the budgets included in the Product Work Plans;

(ii)                                   to coordinate and oversee the reporting and reconciliation of costs and Profits (Losses) with respect to the Products pursuant to Section 4.2 ;

(iii)                                to provide a forum to discuss financial and accounting matters with respect to the Development, Manufacturing and Commercialization activities conducted hereunder, including cost overruns and expenses associated with Additional Development Activities;

(iv)                               to review quarterly financial statements and forecasts to ensure consistency with any applicable budgets; and

(v)                                  to work with the other Sub-Committees and the JSC to ensure that their respective activities are in accordance with the budgets set forth in the Product Work Plans.

(c)                                   Meetings . The JFC shall meet at least [***] ( [***] ) [***] per [***] in connection with the reporting and reconciliation to be conducted pursuant to Section 4.2 (or as otherwise agreed to by the Parties), and such meetings may be conducted in person, by videoconference or by teleconference.  [***] shall [***] in connection with its participation on the JFC.  In addition, either Party may call a meeting of the JFC at any time upon [***] ( [***] ) [***] notice.  Meetings of the JFC will be effective only if at least one (1) representative of each Party is present at or participating in such meeting.

(d)                                  JFC Authority . The JFC shall have decision-making authority with respect to accounting matters related to the reporting done pursuant to Section 4.2 .

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

41

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.14                         Joint Commercialization Sub-Committee .

(a)                                  Membership . The Parties shall, as soon as practicable and, in any event, no later than [***] ( [***] ) [***] after the [***] , form a Commercialization Sub-Committee to oversee execution of the Commercialization Plans (the “ JCC ”).  The JCC shall consist of four (4) representatives of Mylan and four (4) representatives of Momenta, or such other equal number of representatives from each Party as the Parties may agree in writing.  Each member of the JCC will have knowledge and expertise in the commercialization of products similar to the Products, and will have appropriate seniority within the applicable Party.  Without limiting the foregoing, each Party shall have at least one (1) representative to the JCC with expertise in regulatory and medical affairs matters.  Subject to the foregoing, each Party may replace its representatives to the JCC at any time upon written notice to the other Party (subject, however, to such replacement complying with the requirements of this Section 3.14(a) ).

(b)                                  Responsibilities of JCC .  Subject to the terms of this Agreement, the JCC shall have the following responsibilities:

(i)                                      to review and comment on the Commercialization Plans;

(ii)                                   to oversee the execution of the Commercialization Plans as provided by [***] and reviewed (and approved, as applicable to the Commercialization Budget) by [***] ;

(iii)                                to provide a forum to discuss the Commercialization strategies and activities hereunder;

(iv)                               to provide a forum to discuss any issues relating to the Commercialization activities hereunder, including any safety issues with respect to the Products, and propose remediation plans to resolve such issues; and

(v)                                  to review quarterly financial statements and forecasts to ensure operations are in accordance the Commercialization Plan, including any applicable budgets.

(c)                                   Meetings . The JCC shall meet at least four (4) times per year (or as otherwise agreed to by the Parties), and such meetings may be conducted in person, by videoconference or by teleconference.  [***] shall [***] in connection with its participation on the JCC.  In addition, either Party may call a meeting of the JCC at any time upon [***] ( [***] ) [***] notice.  Meetings of the JCC will be effective only if at least one (1) representative of each Party is present at or participating in such meeting.

(d)                                  JCC Authority . Subject to Section 2.4(a)  and (b) , the JCC shall have decision-making authority with respect to how the day-to-day Commercialization Activities are being carried out pursuant to the Product Work Plans.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

42

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

3.15                         Legal Activities and Intellectual Property Sub-Committee .

(a)                                  Membership . The Parties shall, as soon as practicable and, in any event, no later than [***] ( [***] ) [***] after the Effective Date, form a Sub-Committee to develop and oversee the execution of the Collaboration IP Plan for freedom to operate regarding the Products and other Legal Activities with respect to the Products (the “ JLC ”).  The JLC shall consist of three (3) representatives of Mylan and three (3) representatives of Momenta, or such other equal number of representatives from each Party as the Parties may agree in writing.  One of each of the Parties’ representatives to the JLC shall also be a member of the JDRC or JCC.  Each Party shall bear its own expenses in connection with its participation on the JLC.

(b)                                  Responsibilities of JLC .  Subject to the terms of this Agreement, the JLC shall have the following responsibilities:

(i)                                      to oversee and coordinate all Legal Activities with respect to the Products;

(ii)                                   to develop and administer the Collaboration IP Plan;

(iii)                                to nominate a Lead Party with respect to Enforcement Litigation and Other Collaboration Litigation in accordance with Article 5, for approval by the JSC;

(iv)                               to facilitate alignment between the Parties on the strategy and execution of Enforcement Litigation and Other Collaboration Litigation, and to provide oversight and direction to the Lead Party for each Enforcement Litigation or Other Collaboration Litigation; and

(v)                                  to provide a forum to discuss any issues relating to obtaining Final Legal Clearance for the Products.

(c)                                   Meetings . The JLC shall meet at least four (4) times per year (or as otherwise agreed to by the Parties), and such meetings may be conducted in person, by videoconference or by teleconference.  [***] shall [***] in connection with its participation on the JLC.  In addition, either Party may call a meeting of the JLC at any time upon [***] ( [***] ) [***] notice.  Meetings of the JLC will be effective only if at least one (1) representative of each Party is present at or participating in such meeting.

(d)                                  JLC Authority . Except as expressly set forth in Article 5, the JLC shall have decision-making authority with respect to how the day-to-day Legal Activities are being carried out pursuant to the Collaboration IP Plan.

3.16                         Limits on Sub-Committees’ Power .  Notwithstanding the foregoing: (a) any decision that this Agreement provides is to be made by the Parties shall not be within the authority of any Sub-Committee; and (b) no Sub-Committee shall have the authority to: (i) directly impose any financial obligation on either Party or its Affiliates, (ii)  impose a resolution on the Parties with respect to any dispute regarding the existence or amount of any

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

43

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

payment to be made under this Agreement, (iii) directly impose on either Party, an obligation to allocate such Party’s or its Affiliate’s tangible or intangible resources and assets in a certain manner, or (iv) amend, interpret, modify or waive compliance with this Agreement.

ARTICLE 4.
FINANCIAL TERMS

4.1                                Consideration .

(a)                                  Up-Front Payment .  Within [***] ( [***] ) [***] following the [***] , Mylan shall make a non-creditable, non-refundable upfront payment to Momenta of Forty-Five Million U.S. Dollars ($45,000,000).

(b)                                  Continuation Payments . For each Product (other than M834) with respect to which both Parties decide to continue the Development, Manufacture and Commercialization pursuant to Section 2.6(a) , Mylan shall make a continuation payment to Momenta of [***] U.S. Dollars ($ [***] ) within [***] ( [***] ) [***] after each such decision by the Parties (each, a “ Continuation Payment ”).  For clarity, the total amount of Continuation Payments made to Momenta under this Agreement shall not exceed an aggregate of [***] U.S. Dollars ($ [***] ).

(c)                                   Development Milestone .  For M834, Mylan shall pay to Momenta Twenty-Five Million U.S. Dollars ($25,000,000) within [***] ( [***] ) [***] after the first achievement by or on behalf of Momenta of IND Acceptance for M834 (the “ Development Milestone ”).  Such Development Milestone payment shall be payable only once.  For clarity, if such Development Milestone event is not achieved, Mylan shall not owe the corresponding milestone payment.

4.2                                Cost Share and Profit Share .  The Parties shall share all Development Expenses and Shared Other Expenses for each Product, incurred after the Effective Date, as set forth below in this Section 4.2 .  The Parties shall share all Profits (Losses) for each Product according to the Profit Share Percentage.  All such Shared Other Expenses and Profits (Losses) for each Product shall be subject to reconciliation, reimbursement and payment pursuant to the Profit Share calculation set forth in Sections 4.2(b) — (d)  below.  For clarity, each Shared Other Expense shall be accounted for only once when calculating the Profit Share, even if the activity with respect to which such expense is incurred is described in more than one (1) subcategory of Shared Other Expenses.

(a)                                  Development Expenses and Shared Other Expenses .

(i)                                      Development Expenses .

(1)                                  Incurring Development Expenses .  Subject to Section 4.2(a)(i)(2)-(6) , each Party shall initially bear all Development Expenses it incurs as set forth in each Product Work Plan (or as set forth in Exhibit 2.1(a)(1)  prior to approval of such Product Work Plan) for each Product.  Without limiting the foregoing, the Party primarily responsible for

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

44

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

managing execution, or contracting with Third Parties for the conduct, of a Development Activity under Sections 2.2 or 2.3 shall initially bear all Development Expenses owed to Third Parties for such Development Activity.

(2)                                  Mylan Annual Shortfall Exists.   Subject to paragraph (4) below, during the Calendar Year in which the Effective Date falls, and in any Calendar Year thereafter when a Mylan Annual Shortfall exists:

(A)                                If the CPM Balance equals or exceeds the Mylan Annual Shortfall, then the CPM Amount Used in such Calendar Year shall be the amount of the Mylan Annual Shortfall and there shall be [***] in such Calendar Year.

(B)                                If the CPM Balance is less than the Mylan Annual Shortfall or is [***] , then the CPM Amount Used in such Calendar Year shall be the amount of the [***] and the Mylan Development Reconciliation Payment shall be equal to the difference between the Mylan Annual Shortfall and such CPM Amount Used.

(C)                                If a given Calendar Year begins with a [***] , and neither Party anticipates (x)  [***] will occur in such Calendar Year or (y) that payment of the [***] payment will occur in such Calendar Year (but payment of [***] or [***] payment could be payable in a future Calendar Year based on the then-current Product Work Plans) ( [***] Condition”), then:

I .                                         Such Development Expenses will be reconciled [***] of such Calendar Year;

II .                                    The calculation of the Mylan Development Reconciliation Payment shall be determined for the [***] ( [***] ) [***] periods ending [***] in such Calendar Year; and

III .                               In making such calculations, each [***] ([***]) [***] period shall be used in lieu of the full Calendar Year in applying the applicable defined terms in the calculation of the Mylan Development Reconciliation Payment.

(3)                                  Momenta Annual Shortfall Exists.   Subject to paragraph (4) below, in a Calendar Year when a Momenta Annual Shortfall exists, the Momenta Development Reconciliation Payment for the Calendar Year shall be equal to the [***] ; provided that if a Calendar Year begins with [***] Condition, then:

(A)                                Such Development Expenses will be reconciled [***] of such Calendar Year;

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

45

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(B)                                The calculation of the Momenta Development Reconciliation Payment shall be determined for the [***] ( [***] ) [***] periods ending [***] in such Calendar Year; and

(C)                                In making such calculations, each [***] ( [***] ) [***] period shall be used in lieu of the full Calendar Year in applying the applicable defined terms in the calculation of the Momenta Development Reconciliation Payment.

(4)                                  Finalization of the CPM Balance .  In the first Calendar Quarter in which (A) the CPM Balance [***] and there are [***] or [***] that will create a new [***] or (B) the Parties do not expect any [***] from performance of any remaining activities under the Product Work Plan (each of (A) and (B) being the “ Finalization of the CPM Balance ”), then the Parties shall initiate reconciliation of Development Expenses in such Calendar Quarter (and thereafter) on a [***] basis and share Development Expenses in a Calendar Quarter as follows:

(A)                                If the Mylan Quarterly Shortfall is [***] , then the Mylan Development Reconciliation Payment in such Calendar Quarter shall [***] the Mylan Quarterly Shortfall.

(B)                                If the Momenta Quarterly Shortfall is [***] , then the Momenta Development Reconciliation Payment in such Calendar Quarter shall [***] the Momenta Quarterly Shortfall.

(5)                                  Reconciliation of Development Expenses .

(A)                                [***] the [***] under [***]: Without limiting the reporting obligations in Sections 4.2(b)  and (c)  below, and [***] the [***] the [***] , within [***] ( [***] ) [***] after the expiration of the applicable Calendar Year (or [***] a [***] ), each Party shall provide the other Party with a report of its Development Expenses for all Products for such Calendar Year (or [***] a [***] ) (individually, a Party’s “ Annual Development Expenses ”).  If there is a Development Reconciliation Amount owed by a Party for a Calendar Year (or [***] a [***] ), then it shall be paid to the other Party within [***] ( [***] ) [***] after delivery of both Parties’ reports of Annual Development Expenses for such Calendar Year (or [***] a [***] ).

(B)                                [***] the [***] under [***]:  Without limiting the reporting obligations in Sections 4.2(b)  and (c)  below, and [***] the [***] the [***] , within [***] ( [***] ) [***] after the expiration of the applicable Calendar Quarter, each Party shall provide the other Party with a report of its Development Expenses for all Products for such Calendar Quarter (individually, a Party’s “ Quarterly Development Expenses ”).  If there is a Development Reconciliation Amount owed by a Party for a Calendar Quarter, then it shall be paid to the other Party within [***] ( [***] ) [***] after delivery of both Parties’ reports of Quarterly Development Expenses for such Calendar Quarter.  In addition, any

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

46

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

[***] that remains on or after the [***] the [***] shall thereafter be reported and [***] payable by Mylan in such Calendar Quarter (or [***] ) under Sections 4.2(b)-(d).

(6)                                  Example and Definitions.

An example calculation of this reconciliation process is set forth in Exhibit 4.2(a)(i).  For purposes of the foregoing,

a.                                       “Momenta Annual Development Expenses” means for a Calendar Year (or [***] under Section  [***] ), the amount equal to the Development Expenses incurred by Momenta in such Calendar Year (or [***] under Section  [***] ).

b.                                       “Mylan Annual Development Expenses” means for a Calendar Year (or [***] under Section  [***] ), the amount equal to the Development Expenses incurred by Mylan in such Calendar Year (or [***] under Section  [***] ).

c.                                        “Mylan Annual Shortfall” means [***] the amount by which the Momenta Annual Development Expenses [***] the [***] for any Calendar Year (or [***] under Section  [***] ).

d.                                       “Mylan Quarterly Shortfall” means [***] the amount by which the Momenta Quarterly Development Expenses [***] the [***] in a Calendar Quarter.

e.                                        “Momenta Annual Shortfall” means [***] the amount by which the Mylan Annual Development Expenses [***] the [***] in a Calendar Year (or [***] under Section  [***] ).

f.                                         “Momenta Quarterly Shortfall” means [***] the amount by which the Mylan Quarterly Development Expenses [***] in a Calendar Quarter.

g.                                        “ Momenta Development Reconciliation Payment” is the amount determined under Section  [***] and Section 4.2(a)(i)(4)(B)  .

h.                                       “ Mylan Development Reconciliation Payment ” is the amount determined under Section  [***] and Section 4.2(a)(i)(4)(A).

i.                                           The Momenta Development Reconciliation Payment and the Mylan Development Reconciliation Payment may each be referred to herein as a “ Development Reconciliation Amount .”

j.                                          “ CPM Balance ” for a Calendar Year (or [***] under Section  [***] ) means the [***] and [***] paid [***] under this Agreement as of the end of such Calendar Year (or [***] under Section  [***] ), reduced by the [***] during [***] (and [***] ).

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

47

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

k.                                       “ CPM Amount Used ” for a Calendar Year (or [***] under Section  [***] ) means the amount of the CPM Balance in each Calendar Year (or [***] under Section  [***] ) that is [***] (or [***] under Section  [***] ).

l.                                           “Excess CPM Remaining Amount” shall mean any CPM Balance that [***] the [***] the [***] .

(ii)                                   Commercialization Expenses . The Parties shall share all Commercialization Expenses for Commercialization Activities that are incurred by the Parties in accordance with each Product Work Plan, according to the Profit Share Percentage.

(iii)                                Development and Commercialization Expense Overages .  Each Party shall promptly notify the other Party if the notifying Party reasonably determines that it is likely to otherwise exceed its allocated Development Expenses or Commercialization Expenses under an applicable Product Work Plan, and such excess expenses shall be treated as follows.  If a Party’s anticipated Development Expenses or Commercialization Expenses in any Calendar Quarter exceed those included in the development or commercialization budget for all of such Party’s activities under the Product Work Plan in such Calendar Quarter by [***] (“ Excess Further Expenses ”), such Party shall provide the other Party an explanation and reasonable documentation of such Excess Further Expenses, and such Excess Further Expenses actually incurred by such Party shall be borne [***] percent ( [***] %) by Momenta and [***] percent ( [***] %) by Mylan; provided that such Excess Further Expenses [***] and [***] , such Party [***] the [***] or [***] for [***] the [***] for such Calendar Year.  If such Excess Further Expenses exceed those included in the Development or Commercialization budget for all of such Party’s activities under the applicable Product Work Plan for a Calendar Quarter by [***] , the Parties shall meet promptly to discuss the reasons for such Excess Further Expenses and their impact on the annual budget under the applicable Product Work Plan.  The Excess Further Expenses mechanism is implemented as a tool to monitor and effectively manage quarterly variations in Development Expenses and Commercialization Expenses for timing differences. It does not provide [***] the [***] the [***] .  If a Party determines or anticipates that its projected Development Expenses or Commercialization Expenses will exceed those included in the Development or Commercialization budget for all of such Party’s activities under the applicable Product Work Plan for such Calendar Year, then such Party would need to obtain approval from the JSC to increase the budget under the Product Work Plan prior to incurring such costs, and the allocation of Development Expenses or Commercialization Expenses in excess of the previously approved budget in the Product Work Plan will be subject to the written agreement of the JSC.

(iv)                               [***] .  The Parties agree and intend that [***] of [***] or [***] shall not be included in Shared Other Expenses, except as expressly agreed by the Parties pursuant to the applicable Product Work Plan or otherwise by the Parties in writing.  However, the Parties agree and intend that [***] to [***] or [***] , shall be included in Shared Other Expenses.  Subject to the foregoing, Each Party shall have the right to [***] or [***] for the Products as it deems necessary or appropriate.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

48

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(v)                                  COGS.  The Parties shall share all COGS incurred in connection with the Commercialization of the Product in accordance with each Product Work Plan, according to the Profit Share Percentage.

(vi)                               Legal Expenses .  The Parties’ rights and responsibilities with respect to the Legal Activities, including the financial rights and obligations of the Parties, are described in Article 5 and Section 8.4 .

(vii)                            Third Party Intellectual Property Payment Expenses .  Neither Party shall, after the Effective Date, enter into, amend or modify an agreement with a Third Party to obtain a license or rights under Third Party Patent Rights or Know-How necessary to Develop, Manufacture or Commercialize the Product that would result in Third Party Intellectual Property Payments (including without limitation, license fees, annual payments and royalties), without: (A) prior written notice to the other Party, and (B) the consent of the JSC, [***] or [***] .  Upon the [***] the JSC of such an agreement, the Parties shall be responsible for, and allocate according to the Profit Share Percentage, the Third Party Intellectual Property Payments (including, without limitation [***] and [***] ) payable to the licensor or seller of such Patent Rights and Know-How based on the Development, Manufacture or Commercialization of the Products by or on behalf of the Parties hereunder.

(viii)                         FTEs and FTE Costs .  Each Party shall record and account for its FTE effort for the Development and Commercialization of Products to the extent that such FTE effort is included in Development Expenses or Commercialization Expenses that are, or may in the future be, shared under this Agreement.  Each Party shall report such FTE effort to the JSC on a quarterly basis.  Except to the extent provided herein, each Party shall calculate and maintain records of FTE effort incurred by it in the same manner as used for other products developed by such Party.  The JSC shall review the FTE Costs and any adjustments thereto annually as part of its review, update and approval of the Product Work Plans.

(b)                                  Incurring and Reporting of Shared Other Expenses and Development Expenses; Summary Statements .  Except as expressly provided otherwise in this Agreement and subject to reconciliation, reimbursement and payment as provided in Section 4.2(c) and (d), the Party initially incurring Shared Other Expenses will be responsible for and pay for all such Shared Other Expenses so incurred.  Each Party will maintain the books and records referred to in Section 4.3 and will accrue all Shared Other Expenses, Development Expenses and Net Sales in accordance with the terms and conditions hereof and in accordance with applicable Accounting Standards.  Within ten (10) Business Days after the end of each calendar month, each Party will submit to the other Party a non-binding, good faith estimate of the Shared Other Expenses accrued, Development Expenses, and, if applicable, Net Sales during the just-ended calendar month.  Within [***] ( [***] ) [***] after the end of each Calendar Quarter (or as otherwise agreed by the JFC pursuant to Section 4.2(e)), each Party will submit to the other Party a written report reflecting the accrual of Shared Other Expenses, Development Expenses and Net Sales during the just-ended Calendar Quarter, as well as any Sublicense Revenue, on a Product-by-Product basis (each a “ Summary Statement ”). To the extent Momenta makes Net Sales pursuant to a Co-Commercialization Agreement, it shall include the information described in Section 4.2(c)(i) - (ii)  below in its Summary Statement for each applicable Calendar Quarter.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

49

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Such Summary Statements shall specify in reasonable detail (as agreed by the JSC) all expenses included in such Shared Other Expenses and Development Expenses during such Calendar Quarter and, upon the reasonable request of the other Party, shall be accompanied by invoices, or such other appropriate supporting documentation as may be required by the JSC.  Each Party shall report the Shared Other Expenses and Development Expenses incurred by it in comparison to the Product Work Plan.  The Parties shall seek to resolve any questions related to such Summary Statements within [***] ( [***] ) [***] following receipt by each Party of the other Party’s report hereunder.  The JSC shall facilitate the resolution of any questions concerning such Summary Statements, as appropriate. Each Party shall have the right at reasonable times and upon reasonable prior notice to audit the other Party’s records as provided in Section 4.5 to confirm the accuracy of the other Party’s costs and reports with respect to Shared Other Expenses and Development Expenses that are shared under this Agreement.  Upon the request of either Party from time to time, the JFC will discuss any questions or issues arising from the Summary Statements, including the basis for the accrual of specific Shared Other Expenses or Development Expenses.

(c)                                   Reconciliation Report.   As soon as practicable after the end of the Calendar Quarter, but in any event within [***] ( [***] ) [***] after receipt by the Preparing Party (as defined below) of the other Party’s Summary Statement (or as otherwise agreed by the JFC pursuant to Section 4.2(e)), the Preparing Party will prepare a reconciliation report (reasonable supporting documentation and calculations sufficient to support each Party’s associated financial reporting obligations, independent auditor requirements and obligations under the Sarbanes-Oxley Act shall be provided upon request) that reconciles each Party’s Summary Statement and the Profits (Losses) and Legal Expenses (to the extent not included in Profits (Losses) being shared pursuant to the Profit Share Percentage) on a Product-by-Product basis in accordance with Section 4.2(a)  (the “Reconciliation Report”).  Prior to Launch of any Product, [***] shall be the Preparing Party for Reconciliation Reports for such Product.  Following Launch of any Product, [***] shall be the Preparing Party for Reconciliation Reports for such Product.  Without limited the foregoing, following Launch of any Product, the Reconciliation Report shall include:

(i)                                      the gross sales of all Products on a Product-by-Product and country-by-country basis, sold by each Party and its Affiliates during the Calendar Quarter, including the amount of each Product sold and the gross amount invoiced for each Product;

(ii)                                   a calculation of Net Sales from gross sales of each Product on a Product-by-Product basis (set forth in reasonable detail and, as applicable, including the adjustments to gross sales set forth in Section 1.77);

(iii)                                a calculation of the Profits (Losses) on a Product-by-Product basis, including reasonably detailed information on the (A) Cost of Goods Sold; (B)   Commercialization Expenses; (C) Sublicense Revenues; and (D) all other Shared Other Expenses;

(iv)                               the amount owed by one Party to the other Party to effect the Profit Share and allocation of Legal Expense (to the extent not included in Profits (Losses) being shared pursuant to the Profit Share Percentage); and

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

50

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(v)                                  The calculation pursuant to Section 4.2(a)(i) of Development Reconciliation Amount payable to a Party for the applicable Calendar Year or Calendar Quarter, and any [***] for an [***] to be applied to any [***] in such Calendar Quarter.  For clarity, to the extent [***] is not [***] a [***] by [***] for [***] in the Calendar Quarter reported, it may be [***] and [***] a [***] in [***] Calendar Quarters by [***] .

(d)                                  Payments of Cost Share and Profit Share.

(i)                                      Based on the Reconciliation Report for the applicable Calendar Quarter or Calendar Year, the applicable Party (to whom a net amount is owed to achieve the Profit Share, the Allocable Legal Expense Share with respect to Legal Expenses not included in the Profit Share and any Excess CPM Remaining Amount credit) will invoice the other Party after such Reconciliation Report is complete, and the receiving Party will pay such invoice within [***] ( [***] ) [***] of receipt of invoice.  For clarity, prior to [***] of a Product, the sharing of expenses will be calculated in accordance with this Section 4.2 for such Product, and [***] in the calculation of [***] shall equal [***] .  The Parties may, upon mutual agreement, net out payment of a Development Reconciliation Amount owed to one Party under Section 4.2(a)(i)  with any payment owed to the other Party under this Section 4.2(d)(i) .

(ii)                                   Overdue Payments .  If any payment owed to a Party under this Agreement is not made when due, such outstanding payment shall accrue interest (from the date such payment is due through and including the date upon which full payment is made) at the [***] ( [***] ) reported on the day such payment was due in The Wall Street Journal (U.S. Internet version at www.wsj.com under the “Market Data” tab), plus [***] percent ( [***] %) [***] , from the due date until paid in full, provided that in no event shall said annual rate exceed the maximum interest rate permitted by law in regard to such payments.  Such payment, when made, shall be accompanied by all interest so accrued.  Said interest and the payment and acceptance thereof shall not negate nor waive the right of a Party to any other remedy, legal or equitable, to which it is entitled because of the delinquency of the payment.

(e)                                   Efforts to Streamline Reporting . The Parties will cooperate [***] , through the JFC, to develop processes and align the reporting timelines set forth in Section 4.2(a), (b) and (c)  with each Party’s internal close calendars and internal and external reporting timelines, processes and obligations.

4.3                                Books and Records .  During the Term of this Agreement, each Party shall keep, and shall ensure that its respective Affiliates and Sublicensees shall keep, in accordance with its internal record-retention policies, complete and accurate records in sufficient detail to make the reports required hereunder, to confirm compliance with the provisions of this Agreement, to properly reflect all amounts billed, owed or reported and to verify the amounts payable hereunder for a period of [***] ( [***] ) [***] after such payments are made.

4.4                                Taxes .

(a)                                  Tax Withholding .  Each Party shall be entitled to deduct and withhold from any amounts payable under this Agreement such taxes as are required to be deducted or

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

51

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

withheld therefrom under any provision of Applicable Law.  The Party that is required to make such withholding (the “ Paying Party ”) will: (i) deduct those taxes from such payment, (ii) timely remit the taxes to the proper taxing authority, and (iii) send evidence of the obligation together with proof of tax payment to the recipient Party (the “ Payee Party ”) on a timely basis following that tax payment; provided, however, that before making any such deduction or withholding, the Paying Party shall give the Payee Party notice of the intention to make such deduction or withholding (such notice, which shall include the authority, basis and method of calculation for the proposed deduction or withholding, shall be given at least a reasonable period of time before such deduction or withholding is required, in order for such Payee Party to obtain reduction of or relief from such deduction or withholding).  Each Party agrees to cooperate with the other Parties in claiming refunds or exemptions from such deductions or withholdings under any relevant agreement or treaty which is in effect to ensure that any amounts required to be withheld pursuant to this Section 4.4(a)  are reduced in amount to the fullest extent permitted by Applicable Laws.  In addition, the Parties shall cooperate in accordance with Applicable Laws to minimize indirect taxes (such as value added tax, sales tax, consumption tax and other similar taxes (“ Indirect Taxes ”)) in connection with this Agreement, as applicable.

(b)                                  Tax [***] .  Notwithstanding the foregoing, if: (i) any Party [***] or [***] its rights or obligations under this Agreement, (ii) as a result of such [***] or [***] , such Party (or its assignee) is required by Applicable Law to [***] or [***] or [***] results in the imposition of [***] that [***] applicable, from or in respect of any amount payable under this Agreement, and (iii) such [***] or [***] the amount of [***] or [***] that would have been applicable [***] or [***] , then any such amount payable shall be [***] to take into account such [***] or [***] as may be necessary so that, after making all required [***] (including [***] on the [***] and/or paying such [***] , as the case may be, the [***] receives an amount equal to the [***] it would have received [***] been made and [***] been imposed.  The obligation to [***] pursuant to the preceding sentence shall not apply, however, to the extent such [***] or [***] : (1) would not have been imposed [***] the [***] by the [***] of its rights or obligations under this Agreement or the [***] of [***] the [***] , to the extent such [***] or [***] occurs after the [***] or [***] by the [***] described in the first sentence of this Section 4.4(b); or (2) are attributable to the failure by the [***] to comply with the requirements of Section 4.4(c).  Solely for purposes of this Section 4.4, a Party’s [***] shall include its [***] of [***] or [***] and a [***] shall include a [***] or other action resulting in a [***] in [***] .

(c)                                   Tax Documentation .  Each Party has provided a properly completed and duly executed IRS Form W-9 or applicable Form W-8 to the other Party.  Each Party and any other recipient of payments under this Agreement shall provide to the other Party, at the time or times reasonably requested by such other Parties or as required by Applicable Law, such properly completed and duly executed documentation (for example, IRS Forms W-8 or W-9) as will permit payments made under this Agreement to be made without, or at a reduced rate of, withholding for taxes.

(d)                                  Irish Tax Considerations .  The Parties acknowledge and agree that: (i) Mylan is domiciled in Ireland and Momenta is domiciled in the United States; (ii) under current Applicable Law in Ireland, no amount contemplated to be payable under this Agreement by

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

52

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Mylan to Momenta is subject to any deduction or withholding; and (iii) Mylan will not, absent a [***] , deduct or withhold from the amounts payable pursuant to Section 4.1(a), any amount in respect of any taxes, provided that Momenta delivers a properly completed and duly executed IRS Form W-9 to Mylan.

(e)                                   U.S. Tax Considerations .  Mylan shall indemnify, defend and hold Momenta harmless from any and all liabilities, claims and losses with respect of U.S. federal, state or local income or withholding taxes attributable to any amounts payable to (or allocable to) Mylan under this Agreement.

(f)                                    Cooperation .  Mylan and Momenta shall [***] to cooperate with each other to minimize any adverse tax consequences that may arise with regard to the transactions contemplated by this Agreement and related agreements.

4.5                                Audits and Inspection .  From and after the Effective Date, upon [***] ( [***] ) [***] prior written notice from a Party, the other Party shall permit, and shall ensure that its Affiliates shall permit, an independent certified public accounting firm of recognized national standing, selected by the requesting Party and [***] , at the [***] expense, to have access to such Party’s (or their Affiliates) records maintained pursuant to Section 4.3 , as may be reasonably necessary to verify the accuracy of any amounts reported, actually paid or payable under this Agreement for any year ending not more than [***] ( [***] ) [***] prior to the date of such request; provided that a Party’s records related to any given year shall not be subject to audit pursuant to this Section 4.5 [***] .  The audited Party may require such accounting firm to be subject to reasonable and customary confidentiality obligations as a condition to conducting such audit.  Such audits may be made no more than [***] , during normal business hours at reasonable times mutually agreed by the Parties; provided that such [***] or [***] .  If such accounting firm concludes that additional amounts were owed to the requesting Party during such period with respect to such country of the Territory as applicable, or if the requesting Party overpaid based on a calculation of the Profit Share, the Development Reconciliation Amount or Legal Expenses not included in the calculation of the Profit Share during the audited period, the other Party shall pay such additional amounts or refund such overpayment (including interest on such additional sums with respect to such country of the Territory in accordance with Section 4.2(d)(ii)) within [***] ( [***] ) [***] after the date the requesting Party delivers to the other Party such accounting firm’s written report so concluding.  If such accounting firm concludes that additional amounts were owed to the audited Party during such period with respect to such country of the Territory as applicable, or if the audited Party overpaid based on a calculation of the Profit Share, the Development Reconciliation Amount or Legal Expenses not included in the calculation of the Profit Share during the audited period, the auditing Party shall pay such additional amounts or refund such overpayment (including interest on such additional sums with respect to such country of the Territory in accordance with Section 4.2(d)(ii)) within [***] ( [***] ) [***] after the date the requesting Party delivers to the other Party such accounting firm’s written report so concluding. The fees charged by such accounting firm shall be paid by the requesting Party; provided, however, that if the audit discloses that the amounts payable to such Party for the audited period are more than [***] percent ( [***] %) of the amounts actually paid for such period in such country of the Territory as applicable, or if the audit discloses that the other Party has

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

53

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

overcharged the requesting Party for rates or fees for products or services for such period in such country of the Territory as applicable, by over [***] percent ( [***] %), then the other Party shall pay the reasonable fees and expenses charged by such accounting firm.

ARTICLE 5.
INTELLECTUAL PROPERTY AND LITIGATION

5.1                                Ownership of Intellectual Property .  Mylan shall own and retain all right, title, interest and ownership in Mylan Intellectual Property, including Mylan Intellectual Property that was conceived, derived, acquired or made prior to the Effective Date or independently outside the course of the Collaboration, except as expressly licensed to Momenta under this Agreement.  Momenta shall own and retain all right, title, interest and ownership in the Momenta Intellectual Property, including Momenta Intellectual Property that was conceived, derived, acquired or made prior to the Effective Date or independently outside the course of the Collaboration, except as expressly licensed to Mylan under this Agreement.  The Parties shall jointly own all Collaboration Intellectual Property developed in the course of performing their activities under the Product Work Plan under the Collaboration. Subject to the rights and licenses set forth herein, each Party may license or otherwise exploit the Collaboration Intellectual Property without the consent of, or reporting or accounting to, the other Party, and each Party hereby waives any right it may have under Applicable Laws of any jurisdiction to require any such consent, reporting or accounting.

5.2                                Improvements .  Mylan shall own all right, title, interest and ownership in and to Mylan Improvements created in the course of the Collaboration.  Momenta shall own all right, title, interest and ownership in and to the Momenta Improvements created in the course of the Collaboration.

5.3                                Prosecution and Maintenance of Patent Rights.

(a)                                  Generally .  From and after the Effective Date:

(i)                                      Mylan shall have the right and responsibility, in its [***] discretion, to prepare, file, prosecute (including the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings with respect to the Mylan Patent Rights) and maintain patent protection with respect to the Mylan Patent Rights, taking into account comments from Momenta with respect thereto.  Mylan shall keep Momenta reasonably informed with respect to the status of the Mylan Patent Rights, including by providing Momenta with copies of all material documentation or correspondence concerning the Mylan Patent Rights in the Territory.  Mylan shall solicit Momenta’s comments prior to filing any new Mylan Patent Rights or making additional filings on existing Mylan Patent Rights and shall consider Momenta’s [***] comments with respect thereto [***] .  If Mylan decides to abandon, or otherwise fails to prosecute or maintain, any Patent Rights within the Mylan Patent Rights in any country in the Territory, Mylan shall provide Momenta with written notice of such decision at least [***] ( [***] ) [***] prior to any applicable filing deadline, and of any such failure promptly after it occurs.  In such case, Momenta shall have the right, but not the obligation, to prepare, file, prosecute and maintain patent protection with respect to such

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

54

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Mylan Patent Right in such country [***] , and such Patent Right shall be assigned to Momenta and become a Momenta Patent Right, subject to the licenses granted in this Agreement.  Furthermore, subject to the terms and conditions of this Agreement, Momenta hereby grants to Mylan, effective as of the Effective Date, a [***] and [***] the [***] to [***] and [***] , under such Momenta Patent Right that were assigned under this Section 5.3(a)(i) for [***] the [***] of any [***] by Momenta to Mylan under this Agreement that remain in effect.

(ii)                                   Momenta shall have the right and responsibility, in its [***] , to prepare, file, prosecute (including the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings with respect to the Momenta Patent Rights) and maintain patent protection with respect to the Momenta Patent Rights, taking into account comments from Mylan with respect thereto.  Momenta shall keep Mylan reasonably informed with respect to the status of the Momenta Patent Rights, including by providing Mylan with copies of all material documentation or correspondence concerning the Momenta Patent Rights in the Territory.  Momenta shall solicit Mylan’s comments prior to filing any new Momenta Patent Rights or making additional filings on existing Momenta Patent Rights and shall consider Mylan’s [***] comments with respect thereto [***] .  If Momenta decides to abandon, or otherwise fails to prosecute or maintain, any Patent Rights within the Momenta Patent Rights in any country in the Territory, Momenta shall provide Mylan with written notice of such decision at least [***] ( [***] ) [***] prior to any applicable filing deadline, and of any such failure promptly after it occurs.  In such case, Mylan shall have the right, but not the obligation, to prepare, file, prosecute and maintain patent protection with respect to such Momenta Patent Right in such country [***] , and such Patent Right shall be assigned to Mylan and become a Mylan Patent Right, subject to the licenses granted in this Agreement.  Furthermore, subject to the terms and conditions of this Agreement, Mylan hereby grants to Momenta, effective as of the Effective Date, a [***] and [***] the [***] to [***] and [***] ( [***] by the [***] or [***] ), under such Mylan Patent Right that were assigned under this Section 5.3(a)(ii) for [***] the [***] of any [***] by Mylan to Momenta under this Agreement that remain in effect.

(iii)                                The JSC shall determine which Party shall have the responsibility to prepare, file, prosecute (including the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings with respect to the Collaboration Patent Rights) and maintain patent protection with respect to Collaboration Patent Rights in the names of both Parties.  If the JSC agrees on which Party shall have such responsibility for the Collaboration Patent Rights, then patent counsel from such Party shall control with respect to the preparation, filing, prosecution (including the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings with respect to the Collaboration Patent Rights) and maintenance of the Collaboration Patent Rights. If the JSC fails to agree on which Party shall have such responsibility for the Collaboration Patent Rights, then [***] from the [***] shall [***] review and [***] the appropriate course of action and control with respect to the preparation, filing, prosecution (including the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings with respect to the Collaboration Patent Rights) and maintenance of the Collaboration Patent Rights.  The non-

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

55

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

controlling Party shall cooperate as reasonably requested by Party assuming control to facilitate control of such filing, prosecution and maintenance of such Collaboration Patent Right by the Party assuming control.

(b)                                  Cooperation .  From and after the Effective Date, each Party shall make available to the Party filing, prosecuting or maintaining any Collaboration Patent Rights, or such Party’s authorized attorneys, agents or representatives, its employees whom such controlling Party [***] deems necessary in order to assist it in obtaining patent protection for such Collaboration Patent Rights.

(c)                                   Responsibility for Legal Expenses .  From and after the Effective Date, responsibility for Legal Expenses associated with patent prosecution (including the handling of inter partes review, post grant review, ex parte reexamination, supplemental examination, opposition and similar proceedings) and maintenance shall be as follows:

(i)                                      Momenta Patent Rights/Mylan Patent Rights .  Each Party shall be responsible for [***] of the Legal Expenses associated with the preparation, filing, prosecution and maintenance of the Patent Rights within the Momenta Intellectual Property and the Patent Rights within the Mylan Intellectual Property, in each case that cover or claim Products during the Term; provided that in the event that: (A) Momenta grants additional rights or licenses under any Patent Rights within the Momenta Intellectual Property to develop and commercialize products, to one or more Third Parties during the Term, Mylan’s responsibility with respect to Legal Expenses associated with such Patent Rights shall [***] to [***] that reflects [***] of [***] being borne by [***] and [***] under such Patent Rights; and (B) Mylan grants additional rights or licenses under any Patent Rights within the Mylan Intellectual Property to develop and commercialize products, to one or more Third Parties during the Term, Momenta’s responsibility with respect to Legal Expenses associated with such Patent Rights shall [***] to [***] that reflects [***] of [***] being borne by [***] and [***] under such Patent Rights.

(ii)                                   Collaboration Patent Rights .  Each Party shall be responsible for [***] of the Legal Expenses associated with the preparation, filing, prosecution and maintenance of Collaboration Patent Rights during the Term.

5.4                                Patent Enforcement/Third Party Infringement .

(a)                                  Notice .  Each Party shall promptly report to the other Party during the Term after the Effective Date any known or suspected infringement or unauthorized use of any of the Mylan Intellectual Property, the Momenta Intellectual Property or the Collaboration Intellectual Property, as the case may be, of which such Party becomes aware, and, upon request, shall provide the other Party with all evidence within its possession or control supporting such known or suspected infringement or unauthorized use.

(b)                                  Initial Meeting .  Promptly following notification to the other Party of any known or suspected infringement or unauthorized use of any of the Mylan Intellectual Property, the Momenta Intellectual Property or Collaboration Intellectual Property based on the

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

56

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Development, Manufacture, or Commercialization of a Product or a Competing Product, the JSC shall meet and shall: (i) evaluate the notice of infringement and attempt to agree on the appropriate course of action and control with respect to enforcement proceedings or Third Party infringement litigation matter (including any proceedings before the U.S. International Trade Commission) with respect to such infringement or unauthorized use (“ Enforcement Litigation ”); and (ii) determine which Party or Parties shall initiate and manage the Enforcement Litigation.  As part of the process of determining whether to pursue any Enforcement Litigation matter, the JSC shall also decide whether or not to seek injunctive relief or post a bond in such Enforcement Litigation based on the recommendation of the JLC.

(c)                                   JSC-Approved Enforcement Litigation .

(i)                                      If the Parties, acting through the JSC, agree to proceed with an Enforcement Litigation, the JSC shall determine which Party should take the lead in managing such Enforcement Litigation (such lead Party, the “ Lead EL Party ” and the other Party the “ Non-EL Lead Party ”) unless the Parties (acting through the JSC) determine that the JLC should manage such Enforcement Litigation.

(ii)                                   The Parties will engage counsel reasonably satisfactory to both Parties under a joint representation agreement, unless a conflict arises regarding such joint representation or no agreement on joint counsel is reached in a reasonable period of time under the circumstances.  If a conflict arises or no agreement on joint counsel is reached, each Party may be represented by separate counsel.  The Lead EL Party, or the JLC when selected to manage the Enforcement Litigation, shall have the right to control the Enforcement Litigation, and the Non-EL Lead Party shall join the suit as a co-plaintiff to the extent required under Applicable Law to enforce such claim.  When a Lead EL Party is controlling a matter, the Non-EL Lead Party shall have the right to participate in the Enforcement Litigation, and provide input directly to the Lead EL Party and Lead EL Party counsel.  Lead EL Party counsel shall provide drafts of proposed court filings to the Non-EL Lead Party for review reasonably in advance of filing to facilitate comments, input and exchange of ideas unless exigent circumstances require immediate action.  Input will be provided promptly to counsel.

(iii)                                The Parties and their counsel shall seek to agree on joint Enforcement Litigation strategy and pleadings recognizing the importance of alignment to the Enforcement Litigation.  Counsel to the Parties shall also consult regularly to discuss Enforcement Litigation plans and strategy and conduct Enforcement Litigation review meetings as needed, but no less frequently than monthly.  When a Lead EL Party is controlling a matter, it shall give due consideration to the Non-EL Lead Party’s recommendations and advice with regard to claims, arguments and strategy in the Enforcement Litigation; provided, however, that if the Parties do not promptly reach agreement on a particular strategy or pleading, then either Party may escalate the matter to the Parties’ representatives (in the case of Mylan, to the Global General Counsel and, in the case of Momenta, to its chief legal officer) to resolve the matter.  If the matter is not resolved in [***] ( [***] ) [***] (or such shorter time period as may be necessary to meet a court deadline) after such escalation, then the Lead EL Party shall have the right to [***] and the Non-EL Lead Party shall have the right [***] the [***] or [***] but shall continue to [***] to the [***] to [***] and to [***] the [***] of the [***] .

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

57

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(iv)                               All Legal Expenses related to an Enforcement Litigation matter that is approved by the JSC with respect to a Product (including any [***] and [***] the [***] ) and any recoveries obtained as a result of such Enforcement Litigation shall be allocated between the Parties in accordance with their respective Allocable Legal Expense Shares.  Further, for the avoidance of doubt, once the JSC has determined that the Parties shall move forward with an Enforcement Litigation matter, a Party shall not have the right to thereafter dissent and become a Passive EL Party pursuant to Section 5.4(d).

(d)                                  Non-JSC-Approved Enforcement Litigation .

(i)                                      If the Parties do not reach consensus at the JSC on initiating an Enforcement Litigation matter within [***] ( [***] ) [***] (or a shorter period of time if the circumstances warrant immediate action) following notification by one Party to the other Party of any known or suspected infringement or unauthorized use of any of the Mylan Intellectual Property, the Momenta Intellectual Property or the Collaboration Intellectual Property , then the Party voting in favor of pursuing such Enforcement Litigation, if such Party is [***] the [***] of the Patent Rights at issue or if the enforcement action involves [***] , shall have the right to determine whether or not to proceed with any Enforcement Litigation.  If such party determines to proceed with the Enforcement Litigation, such Party (hereinafter the “ Active EL Party ”) shall have the sole and exclusive right to select counsel for the Enforcement Litigation initiated by it pursuant to this Section 5.4(d) .  The Party that is not the Active EL Party shall be referred to under this Section 5.4(d)  as the “Passive EL Party ”.

(ii)                                   In any Enforcement Litigation brought by the Active EL Party pursuant to this Section 5.4(d) , the Passive EL Party shall join in such action as a party at the Active EL Party’s request in the event that an [***] , the [***] or other [***] , or the [***] , that a court would lack jurisdiction based on the Passive EL Party’s absence as a party in such suit or the lack of participation by the Passive EL Party would [***] the Enforcement Litigation; but control of such Enforcement Litigation shall remain with the Active EL Party.

(iii)                                All Legal Expenses related to an Enforcement Litigation matter that [***] the [***] with respect to a Product (including any [***] and [***] the [***] ) and any recoveries obtained as a result of such Enforcement Litigation shall be allocated between the Parties as follows:

(1)                                  The Active EL Party shall be responsible for and shall pay [***] percent ( [***] %) of all Legal Expenses (other than any [***] incurred by the [***] in [***] with respect to such Enforcement Litigation) associated with such Enforcement Litigation, subject to the following.

(2)                                  If the Enforcement Litigation pursued by the Active EL Party provides a net benefit to the Collaboration, as determined by the JSC, based on a final, unappealable (or unappealed) court order or decision, or based on a final settlement, any recoveries obtained as a result of such Enforcement Litigation shall be allocated to the Parties in accordance with their respective Allocable Legal Expense Share; provided that the Active EL Party shall be [***] the [***] for such Enforcement Litigation from [***] the [***] the [***] in

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

58

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

accordance with its [***] .  If such Enforcement Litigation matter provides a net benefit to the Collaboration and any [***] to allow the [***] the [***] (including if there [***] ), the [***] shall [***] the [***] for any [***] .  Such [***] shall be made by the [***] to the [***] on a Product-by-Product and country-by-country basis through [***] payable each Calendar Quarter to the [***] for the Product that was the subject of such Enforcement Litigation in the country in which such Enforcement Litigation occurred, beginning with the first Calendar Quarter (or portion thereof) following the final, unappealable (or unappealed) court order or decision, or final settlement of the Enforcement Litigation for such Product in such country.  [***] the [***] for such Product each Calendar Quarter shall [***] the [***] for such Product in such country otherwise [***] to the [***] in such Calendar Quarter.

5.5                                Patent Clearance, Exchange and Defensive Litigation; Third Party Suits .

(a)                                  Patent Clearance, Exchange and Litigation.  Within [***] ( [***] ) [***] after the creation of the JLC, the JLC shall meet to establish a plan to achieve freedom to operate regarding the Products with respect to Third Party intellectual property taking into consideration the anticipated Product Work Plan for each Product (the “ Collaboration IP Plan ”).  The Collaboration IP Plan shall take into consideration alternative development strategies, licensing strategies, litigation strategies (including declaratory judgments), patent clearance under the BPCI Act patent exchange and litigation process, administrative patent challenge procedures (including inter partes review, post grant review, ex parte reexamination, opposition and similar proceedings with respect to the Third Party Patent Rights), and other approaches that [***] the [***] of the Product and [***] (“ Legal Clearance Activities ”).  The Collaboration IP Plan shall include a budget for Legal Clearance Activities, and such budget shall be added or included as part of the then-current Product Work Plan budget that is subject to [***] .  The JSC shall meet and seek to agree at least [***] ( [***] ) [***] prior to the filing of a BLA for Regulatory Approval of a Product as to the appropriate course of action with respect to Legal Clearance Activities with respect to each Product.  Decisions regarding the appropriate course of action with respect to Legal Clearance Activities shall [***] the [***] or the [***] pursuant to Section 12.11(a) and shall [***] to [***] pursuant to Section  [***] for [***] .

(b)                                  Third Party Suits; Other Collaboration Litigation .

(i)                                      In addition, from and after the Effective Date, in the event that a Third Party shall otherwise make any claim or bring any suit or other proceeding (including a declaratory judgment) against a Party, or any of its Affiliates, Sublicensees, or customers, for infringement or misappropriation of any intellectual property rights based on the research, development, making, using selling, offering for sale, import or export of any Product in the Territory, the Party that becomes aware of such claim, suit or other proceeding shall notify the other Party and the Parties shall [***] the [***] .

(ii)                                   The JSC shall consider any potential Other Collaboration Litigation as a regular agenda item in their meetings and with the intent of being prepared to act in sufficient time to allow the Parties to make a timely determination and respond to any such actions.  In connection therewith, the JSC shall discuss in good faith the coordination of all Other Collaboration Litigation (including [***] and [***] ) and whether one Party should take the lead

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

59

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

in any particular activity or suit or the JLC should manage such activity or suit on behalf of the Parties.  The JLC shall recommend, and the JSC shall determine, if applicable, whether the Parties intend to [***] the [***] and [***] process for each Product, and, if so, for [***] and [***] .

(c)                                   JSC-Approved Other Collaboration Litigation .

(i)                                      If, after the Effective Date, the Parties: (A) pursuant to the Collaboration IP Plan, or otherwise [***] the [***] , agree to proceed with an Other Collaboration Litigation matter;  (B)  [***] the [***] agree to bring a counter-claim against a Third Party; or (C) are involuntarily sued by a Third Party in a suit described under Section 5.5(b) with respect to a Product, [***] will take the lead in [***] such Other Collaboration Litigation with respect to all Products other than M834 and [***] will take the lead in [***] such Other Collaboration Litigation with respect to M834, in each case unless the Parties (acting through the JSC) determine that the other Party take the lead in managing such Other Collaboration Litigation (such lead Party, the “ Lead OCL Party ” and the other Party, the “ Non-Lead OCL Party ”).

(ii)                                   The Parties shall engage counsel jointly to facilitate efficient decision-making and activities, except to the extent a conflict arises from such joint representation or no agreement on joint counsel is reached in a reasonable period of time under the circumstances.  If joint representation is not feasible because of a conflict or no agreement on joint counsel is reached, each Party shall have the right to be represented by its own counsel in Other Collaboration Litigation matters.  The Lead OCL Party shall have the right to control the Other Collaboration Litigation and the Non-Lead OCL Party shall have the right to participate in the Other Collaboration Litigation, and provide input directly to the Lead OCL Party and Lead OCL Party counsel.  The Parties shall cooperate in good faith , coordinate their input to counsel, and share drafts of proposed court filings for review reasonably in advance of filing to facilitate comments, input and exchange of ideas unless exigent circumstances require immediate action.  Input will be provided promptly to counsel.

(iii)                                The Parties and their counsel shall seek to agree on joint strategy and pleadings recognizing the importance of alignment.  Counsel to the Parties shall also consult regularly to discuss plans and strategy, and have review meetings as needed, but no less than monthly once the BPCI Act exchange process or other litigation commences.  Each Party shall give due consideration to the other Party’s recommendations and advice with regard to claims, arguments and strategy; however, if the Parties do not reach agreement on a particular strategy or pleading, then either Party may immediately escalate the matter to the Parties representatives (in the case of Mylan, to its Global General Counsel, and, in the case of Momenta, to its chief legal officer) to resolve the matter.  If the matter is not resolved in [***] ( [***] ) [***] (or such shorter time period as may be necessary to meet a court deadline), then [***] shall have the right to proceed [***] , and [***] shall have the right [***] or [***] but shall continue to [***] to the [***] to [***] .  All Legal Expenses related to an Other Collaboration Litigation matter described in Section 5.5(c)(i)  with respect to a Product and any recoveries obtained as a result of such Other Collaboration Litigation shall be allocated between the Parties in accordance with their respective Allocable Legal Expense Shares.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

60

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(d)                                  Non-JSC-Approved Other Collaboration Litigation . Other than as permitted under Section 2.4(f), if, after the Effective Date, the Parties do not reach consensus at the JSC on: (A) initiating an Other Collaboration Litigation matter, including the initiation of the [***] the [***] ; or (B) bringing a counter-claim against a Third Party in any other Collaboration matter under Section 5.5(c)(i)(B), in each case within [***] ( [***] ) [***] (or a shorter period of time if the circumstances warrant immediate action) following notification to the other Party of the desire to initiate or bring such Other Collaboration Litigation, the Parties shall vote on the matter at the JSC, and if there is still no consensus, then neither Party shall have the right to proceed with such Other Collaboration Litigation, without obtaining the prior written agreement of such other Party (which shall be [***] in such [***] ).

5.6                                Settlement .  After the Effective Date, neither Party may settle or consent to an adverse judgment with respect to an Enforcement Litigation or Other Collaboration Litigation which affects the scope, validity or enforcement of the other Party’s intellectual property, without the express written consent of such other Party [***] or [***] .  However, the Party bringing suit may settle or consent to an adverse judgment in any Enforcement Litigation or Other Collaboration Litigation without obtaining consent from the other Party as long as any such settlement or consent judgment [***] a [***] or other [***] or [***] upon the other Party, or [***] the [***] or [***] of the other Party.

5.7                                [***] and [***] Litigation .  The [***] and [***] on the appropriate course of action with respect to [***] proceedings and litigation related to the Products.  All Legal Expenses associated with actions with respect to [***] proceedings that are included in the Collaboration IP Plan or [***] the [***] shall be allocated according to the Parties’ respective Allocable Legal Expense Shares.

5.8                                Patent Marking .  Mylan shall be responsible for complying with patent marking statutes in the applicable country in the Territory in which a Product is sold by Mylan, its Affiliates or its Sublicensees pursuant to this Agreement.

5.9                                Participation of Other Persons in the Collaboration .  Except as the Parties may otherwise agree in writing, each of Mylan and Momenta shall be responsible for executing an appropriate agreement with each employee, individual contractor, consultant or agent (including, for purposes of clarity, individuals who regularly work for Affiliates of Mylan or Momenta), as well as Third Parties working on their respective behalves on the Collaboration, including a provision requiring such employee, individual contractor, consultant, agent, or Third Party to assign or exclusively license to Mylan or Momenta, respectively, all Know-How and Patent Rights which he or she develops or conceives or reduces to practice in the course of his or her Development work on the Collaboration that Cover the Products, so that such Know-How and Patent Rights are Controlled by Mylan or Momenta, respectively.  Each Party shall [***] to enforce the terms of their respective agreements described in this Section 5.9 .  Upon written request, each Party shall make available to the other Party copies of any material agreements with contractors or other Third Parties with respect to Third Party Intellectual Property Payments authorized by the JSC under Section 4.2(a)(vii) , to the extent permitted by such agreements and subject to appropriate confidentiality obligations.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

61

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

5.10                         Common Interest Disclosures .  With regard to any privileged or confidential information or opinions disclosed pursuant to this Agreement by a Party to the other Party regarding Patent Rights or other intellectual property or technology owned by the disclosing Party or a Third Party, the Parties agree that they may have a common legal interest in determining whether, and to what extent, such Patent Rights and other intellectual property rights may affect any Product, and a further common legal interest in defending against any actual or prospective Third Party claims based on allegations of misuse or infringement of Patent Rights or other intellectual property rights relating to any Product.  Accordingly, the Parties agree that all such information and materials obtained by Mylan and Momenta from each other in which they have such a common legal interest may be subject to a separate common interest agreement mutually acceptable to the Parties that they may enter into with respect to such information and materials, upon the request of either Party.  Such separate agreement would provide that: (a) all such information and materials will be treated as protected by the attorney-client privilege, the work product privilege, and any other privilege or immunity that may otherwise be applicable; (b) by sharing any such information and materials, neither Party intends to waive or limit any privilege or immunity that may apply to the shared information and materials; and (c) neither Party shall have the authority to waive any privilege or immunity on behalf of the other Party without such other Party’s prior written consent, nor shall the waiver of privilege or immunity resulting from the conduct of one Party be deemed to apply against the other Party.

5.11                         Identification of the Parties as a Co-Developer of each Product .

(a)                                  During the Term after the Effective Date, Mylan shall ensure that the primary packaging artwork and label (but not marketing materials) that are used for Commercializing each Product in each country in the Territory clearly identify Momenta’s contribution to each Product under the Collaboration, to the extent consistent with Applicable Law and market practice in such country.  To enable such identification, Momenta shall promptly provide Mylan with copies of the Momenta’s corporate trademarks (“Momenta Corporate Trademarks”) to be used on the Product packaging and labels.

(b)                                  Subject to the terms and conditions of this Agreement, Momenta hereby grants Mylan, during the Term after the Effective Date, a non-exclusive and royalty-free license in the Territory to use Momenta Corporate Trademarks solely in connection with the Products for the purpose of packaging, labeling, marketing, distribution and sale of the Products.  Mylan acknowledges and agrees that: (i) the Momenta Corporate Trademarks are and shall remain the sole property of Momenta; (ii) its utilization of the Momenta Corporate Trademarks will not create in it, nor will it represent it has, any right, title or interest in or to such Momenta Corporate Trademarks other than the license expressly granted herein; and (iii) all goodwill attached to or arising out of such use of the Momenta Corporate Trademark by Mylan will accrue to the benefit of Momenta.  Mylan agrees that it will take no action adverse to or inconsistent with Momenta’s ownership of the Momenta Corporate Trademarks, including without limitation seeking to register any of the Momenta Corporate Trademarks in the Territory, or opposing, disputing, or assisting others in opposing or disputing Momenta’s ownership of the Momenta Corporate Trademarks in any way.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

62

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(c)                                   Mylan acknowledges the importance to Momenta of maintaining the reputation and goodwill associated with the Momenta Corporate Trademarks and high standards of quality for any products and services provided in connection with the Momenta Corporate Trademarks.  Mylan agrees that its use of the Momenta Corporate Trademarks shall conform to Applicable Law and to reasonable and customary usage guidelines and quality standards communicated in writing by Momenta to Mylan.  Mylan shall use the Momenta Corporate Trademarks upon or in relation to the Products only in such manner where the distinctiveness, reputation, and validity of the Momenta Corporate Trademarks shall not be impaired and the public shall not be misled.  If Mylan fails to comply with the terms of this Section 5.11(c), then Momenta may terminate the license granted to Mylan in Section 5.11(b) by so notifying Mylan in writing, unless Mylan has complied with such terms within ninety (90) days of receipt of such notice and thereafter Mylan shall have no obligation to include any Momenta Corporate Trademark on any packaging or labeling for Product.

(d)                                  Mylan shall provide representative packaging artwork and labels or marketing material that Mylan wishes to use for the Commercialization of a Product for Momenta’s review.  Momenta shall notify Mylan in writing of any change to any packaging or labeling used for a Product necessary to reflect any changes to Momenta’s trademark, trade name, logo or other features thereof, and Mylan shall promptly incorporate such change in the next revision of such packaging or labeling.  Except as set forth above, after the Effective Date, Mylan shall have the sole right to select the trademarks and trade dress for use with the Products in the Territory, and, as between the Parties, Mylan shall own all such trademarks and trade dress, and all good will associated therewith.

ARTICLE 6.
LICENSES AND EXCLUSIVITY

6.1                                Licenses to Mylan .

(a)                                  Product Specific Licenses .  Subject to the terms and conditions of this Agreement, Momenta hereby grants to Mylan, effective as of the Effective Date, an exclusive (even as to Momenta, except as expressly set forth below in this Section 6.1(a) ) right and license, with the right to grant and authorize sublicenses (solely as [***] the [***] or [***] ), under the Momenta Intellectual Property and Momenta’s interest in the Collaboration Intellectual Property to: (i) Develop, Manufacture (and have made), use, and import the Products; and (ii) sell, offer for sale, have sold and otherwise Commercialize the Products, in each case (i) and (ii) in the Field in the Territory; provided that Momenta shall retain any rights under the Momenta Intellectual Property and Collaboration Intellectual Property necessary to perform any Development Activities or Commercialization Activities assigned to it with respect to a Product in a Product Work Plan or Co-Commercialization Agreement, as applicable.

(b)                                  Covenant .  Mylan shall use such Momenta Intellectual Property solely for the purposes of exercising its rights and performing its obligations under this Agreement and solely as otherwise permitted under Applicable Law.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

63

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

6.2                                Licenses to Momenta .

(a)                                  Collaboration License .  Subject to the terms and conditions of this Agreement, Mylan hereby grants to Momenta, effective as of the Effective Date, a co-exclusive (with Mylan), non-transferable, right and license, in the Field in the Territory, with the right to grant sublicenses solely as agreed to by the Parties ( [***] or [***] ), under the Mylan Intellectual Property solely to: (i) perform its activities under the applicable Product Work Plan(s) to Develop and Manufacture the Products; and (ii) to the extent Momenta has rights to Commercialize the Products pursuant to Section 2.7 to perform its activities under the applicable Commercialization Plan and Co-Commercialization Agreement.

(b)                                  Covenant .  Momenta shall use such Mylan Intellectual Property solely for the purposes of exercising its rights and performing its obligations under this Agreement and solely as otherwise permitted under Applicable Law.

6.3                                In-Licensed Technology .  After the Effective Date, if either Party, its Affiliates, or Sublicensees identify the need for, or are otherwise offered, a license, covenant not to sue or similar rights to Third Party Patent Rights or Know-How that such Party or its Affiliates [***] believes are (a)  [***] to avoid infringement or misappropriation of such Third Party Patent Right or Know-How based on the Development, Manufacture or Commercialization of the applicable Product or (b)  [***] or [***] the Development, Manufacture or Commercialization of the applicable Product, prior to commencing negotiations or entering into an agreement with respect to any such Third Party license or covenant, such Party shall promptly notify the other Party.  The Parties shall thereafter [***] the [***] , regarding whether such Third Party Patent Rights or Know-How [***] or [***] the Development, Manufacturing and Commercialization of the Product.  The Parties shall agree on which Party shall negotiate the license, including any associated Third Party Intellectual Property Payments, provided, however, that [***] license agreement shall be [***] with regard to such rights [***] the [***] or [***] .  The Parties acknowledge that the lead Commercializing Party for a Product shall have the [***] to [***] to [***] from Third Parties [***] the [***] of such Product for [***] and the other Party will assist such lead Commercialization Party in [***] from such Third Parties.  Any amounts owed under such a license agreement that is approved by the [***] based on the Development, Manufacture or Commercialization of the Product shall be Third Party Intellectual Property Payments.

6.4                                Retained Rights .  Any rights of Momenta not expressly granted to Mylan under the provisions of this Agreement shall be retained by Momenta and any rights of Mylan not expressly granted to Momenta under the provisions of this Agreement shall be retained by Mylan.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

64

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

6.5                                Exclusive Collaboration .

(a)                                  Competing Products.  During the Term after the Effective Date, with respect to each Product, Momenta and Mylan each agree, respectively, that they shall not, and shall ensure that their respective Affiliates shall not develop (except to the extent permitted by Section 6.5(b) ), manufacture or commercialize, or enable any Third Party to develop, manufacture or commercialize, in the Territory a Competing Product that is not a Product that is Developed, Manufactured or Commercialized by the Parties pursuant to this Agreement.  Should a Party fail to comply with this Section 6.5 , the other Party may terminate the Agreement on a Product-by-Product and country-by-country basis pursuant to Section 10.3(a) , in addition to any other remedies available to it under this Agreement, in law or in equity.

(b)                                  Acquisition of Competing Product Pursuant to Merger or Acquisition . Neither Party will be deemed to be in breach of the restrictions set forth in this Section 6.5 if such Party or any of its Affiliates acquires a Competing Product, or the right to develop, manufacture or commercialize a Competing Product in a country(ies) in the Territory, through an acquisition of or a merger with the whole or substantially the whole of the business or assets of another Person, so long as such Party (or its Affiliate) notifies the other Party in writing within [***] ( [***] ) [***] after the closing of such acquisition or merger and:

(i)                                      enters into a definitive agreement with a Third Party to Divest such Competing Product in the applicable country(ies) in the Territory (including as part of any Hold Separate Transaction) within [***] ( [***] ) [***] (or such longer period that is required under Applicable Law) after the closing of such acquisition or merger, except that, if the Competing Product acquired by such Party (or its Affiliate) is the Reference Product, and the corresponding Product [***] of the [***] of such Party’s acquisition of such Reference Product, then the period for entering into a definitive agreement with a Third Party to Divest such Reference Product shall be [***] ( [***] ) [***] (instead of [***] ( [***] ) [***] ) after the closing of such acquisition or merger; or

(ii)                                   discontinues the development and commercialization of the Competing Product in the Territory no later than [***] ( [***] ) [***] (or such longer period that is required under Applicable Law) after the closing of such acquisition or merger, except that, if the Competing Product acquired by such Party (or its Affiliate) is the Reference Product, and the corresponding Product [***] of the [***] of such Party’s acquisition of such Reference Product, then the period for discontinuing development and commercialization of such Reference Product shall be [***] ( [***] ) [***] (instead of [***] ( [***] ) [***] ) after the closing of such acquisition or merger.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

65

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(c)                                   Acquisition of Competing Product other than Pursuant to Section 6.5(b).   In the event that, after the Effective Date, a Party (the “ Acquiring Party ”) acquires a Competing Product or in-licenses the right to develop, manufacture and commercialize a Competing Product in a country(ies) in the Territory, other than pursuant to an acquisition described in Section 6.5(b) , the Acquiring Party shall notify the other Party within [***] ( [***] ) [***] after the closing of such acquisition as to whether it intends to: (1)  [***] the Competing Product pursuant to the procedure set forth in Section  [***] ; (2)  [***] development, manufacture and commercialization of the [***] ; (3) terminate this Agreement with respect to the Product associated with such Competing Product, pursuant Section  [***] ; or (4) complete (1) or (2) if required pursuant to an [***] or [***] or [***] by a [***] .  In the event that the Acquiring Party fails to provide such notice within the applicable [***] ( [***] ) [***] period, the Acquiring Party shall be deemed to have provided notice of a decision to pursue item (3) above.  For clarity, the effective date of a termination under item (3) shall be upon the expiration of the applicable notice period set forth in Section 10.2 after notice to terminate this Agreement with respect to the Product is provided pursuant to Section 10.2. For further clarity, until such effective date of termination, the terms and conditions of this Agreement (including the sharing of Profits (Losses)) shall continue.  Termination of this Agreement pursuant to item (3) under this Section 6.5(c) shall have the following effects.

(i)                                      In the event that the Acquiring Party notifies the other Party pursuant to Section 6.5(c) above that it intends to terminate this Agreement with respect to the Product associated with such Competing Product for one or more country(ies), then, upon such termination, the effects of termination under Section 10.6 shall apply solely with respect to such Product in such terminated country(ies), subject to clause (ii) or (iii) below.

(ii)                                   In the event that the Acquiring Party notifies the other Party pursuant to Section 6.5(c) above that it intends to terminate this Agreement with respect to the Product associated with such Competing Product in: (A) the [***] ; or (B)  [***] (the “EU5”), but not both, then upon such termination, the effects of termination under Section 10.6 shall apply, in the case of (A), with respect to such Product in the [***] , and in the case of (B) with respect to such Product in [***] .

(iii)                                In the event that the Acquiring Party notifies the other Party pursuant to Section 6.5(c) above that it intends to terminate this Agreement with respect to the Product associated with such Competing Product in: (A) the [***] ; and (B)  [***] , then upon such termination, the effects of termination under Section 10.6 shall apply with respect to such Product in [***] .

(iv)                               In the case of each of (i), (ii), and (iii) above, the non-terminating Party shall [***] as whether to receive the [***] set forth in Section  [***] under the [***] or [***] , as applicable, for purposes of [***] and [***] the terminated Product in the terminated country(ies), and if such Party notifies the Acquiring Party that it [***] , then the [***] set forth in Section  [***] shall not apply with respect to the terminated Product in the terminated country(ies).  Confidential Information of the Acquiring Party within the Momenta Intellectual Property or Mylan Intellectual Property, as applicable, may be used for purposes of [***] ( [***]

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

66

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

the terminated Product), if taken, but shall in all events remain subject to the protections of Article 7 .

(v)                                  In the case of each of (ii) and (iii) above, the Acquiring Party shall be obligated to continue [***] the [***]   the [***] with respect to [***] intended to [***] the terminated Product in the terminated country(ies), in accordance with the applicable Product Work Plan approved by the JSC as of the effective date of such termination, which [***] during the Extended Notice Period.  Such [***] and [***] in accordance with Section  [***] , which shall survive such termination for any portion of the Extended Notice Period that extends beyond the effective date of such termination.

(vi)                               Solely for purposes of this Section 6.5(c), the “Extended Notice Period” shall mean: (A)  [***] ( [***] ) [***] after the Acquiring Party’s notice of termination pursuant to Section 10.2 has been received by the other Party, if [***] the [***] of the terminated Product has not commenced [***] as of the date of receipt of such notice; and (B)  [***] ( [***] ) [***] after the Acquiring Party’s notice of termination pursuant to Section 10.2 has been received by the other Party, if [***] the [***] of the terminated Product has commenced (or [***] ) as of the date of receipt of such notice.

(d)                                  Additional [***] Activities .

(i)                                      If, after the Effective Date, a Party wishes to conduct [***] with respect to a Product that are not covered by an approved Product Work Plan (“ Additional [***] Activities ”), then such proposing Party shall provide the JSC (or applicable Sub-Committee) with a proposal for such Additional [***] Activities , including a description of the activities, timelines for the activities and a projected budget for such activities, for review and approval, and shall [***] the [***] .  If the JSC approves such Additional [***] Activities, then such Additional [***] Activities shall be incorporated into the existing Product Work Plan, and the costs of such Additional [***] Activities shall be shared by the Parties as Development Expenses pursuant to Sections 4.2(a)(i) .  If the JSC does not approve such Additional [***] Activities, then such proposing Party may conduct such Additional [***] Activities independently , [***] , and the [***] of such Additional [***] Activities shall not be [***] hereunder, subject to Section 6.5(d)(ii).

(ii)                                   Additional [***] Intellectual Property .  Any Know-How or Patent Rights arising in the performance of any such Additional [***] Activities proposed to but not approved by the JSC and conducted independently by a Party shall not be included within such Party’s Intellectual Property (i.e., Momenta Intellectual Property or Mylan Intellectual Property, as applicable) for purposes of licenses granted to the other Party under this Agreement, and shall not be used for the Development, Manufacture or Commercialization of any Products under this Collaboration (unless the Parties agrees in writing to the use of such Know-How or Patent Rights).  In connection with such agreement, the Parties will negotiate terms for such Know-How or Patent Rights to be included within such Party’s Intellectual Property (i.e., Momenta Intellectual Property or Mylan Intellectual Property, as applicable) for purposes of licenses granted to the other Party under this Agreement.  For clarity, exploitation of such Know-How and Patent Rights shall remain subject to the restrictions set forth in Section 6.5(a) .

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

67

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

6.6          No Additional Licenses .  Except as expressly provided in this Agreement, nothing in this Agreement grants either Party any right, license, title or interest in and to the intellectual property rights of the other Party (either expressly, by implication or by estoppel).

6.7          Bankruptcy .  All rights and licenses granted under or pursuant to any Section of this Agreement are, and shall otherwise be deemed to be, for purposes of Section 365(n) of Title 11, United States Code (the “ Bankruptcy Code ”), licenses of rights to “intellectual property” as defined under Section 101(35A) of the U.S. Bankruptcy Code.  The Parties shall retain and may fully exercise all of their respective rights and elections under the U.S. Bankruptcy Code.  Upon the bankruptcy of a Party, the non-bankrupt Party shall further be entitled to a complete duplicate of (or complete access to, as appropriate) any such intellectual property necessary to exercise such rights and licenses, and such, if not already in its possession, shall be promptly delivered to the non-bankrupt Party, unless the bankrupt Party elects to continue, and continues, to perform all of its obligations under this Agreement.

ARTICLE 7.
CONFIDENTIAL INFORMATION

7.1          Confidentiality .  Except as expressly contemplated by this Agreement or any agreement between the Parties that is ancillary hereto, each Party shall hold in confidence and shall not publish or otherwise disclose and shall not use for any purpose (except for the purposes of carrying out its obligations or exercising its rights under this Agreement): (a) any Confidential Information of the other Party disclosed to it pursuant to this Agreement and (b) the terms of this Agreement (subject to Section 7.4 ), until [***] ( [***] ) [***] after the expiration or termination of this Agreement. The members of the JSC and any Sub-Committees shall use pricing and other competitive commercial information provided by the other Party solely for purposes of the Collaboration and Commercializing the Products in accordance with this Agreement.  All Confidential Information of a Party, including all copies and derivations thereof, is and shall remain the sole and exclusive property of the disclosing Party and subject to the restrictions provided for herein.  Subject to Section 7.2 , Section 7.3 , Section 7.4 and Section 7.5 , neither Party shall disclose any Confidential Information of the other Party other than to those of its directors, officers, Affiliates, employees, independent contractors, financial underwriters or lenders, actual or potential licensees or sublicensees (if permitted), agents, and external advisors directly involved in or concerned with the carrying out of this Agreement, on a strictly applied “need to know” basis (which, for clarity, for disclosure to a financial underwriter or lender shall only be in connection with a financing of such Party); provided, however, that such persons and entities are subject to confidentiality and non-use obligations at least as stringent as the confidentiality and non-use obligations provided for in this Article 7 , and provided further that such Party ensures that any confidentiality agreement with a financial underwriter or lender will specifically identify that such financial underwriter or lender will protect the confidential information of such Party’s collaborators disclosed to such financial underwriter or lender.

7.2          Public Disclosure .  The Parties have attached hereto as Exhibit 7.2 , mutually acceptable press releases by each Party announcing the Collaboration (the “ Initial Press Releases ”), which each Party will release at a time to be mutually agreed by the Parties.  The JSC shall review and approve, from time to time, proposed disclosures of the Parties relating to

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

68

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

this Collaboration (or related activities, results or events) and [***] of [***] or [***] .  Except: (a) as determined by a Party [***] to comply with Applicable Law (including applicable securities laws and the rules and regulations of exchanges upon which a Party’s securities are traded), subject to this Section 7.2 ; (b) with respect to JSC approved disclosures; and (c) with respect to the Initial Press Releases as agreed upon between the Parties, neither Party shall issue a press release or make any other public disclosure regarding the terms or existence of this Agreement or the Collaboration without the prior approval of such press release or public disclosure by the other Party.  Each Party shall submit any such press release or public disclosure to the other Party, and the receiving Party shall have [***] ( [***] ) [***] from receipt to review and approve any such press release or public disclosure, [***] or [***] .  Notwithstanding the preceding requirements related to a press release or other public disclosure, if a public disclosure is required by Applicable Law, including without limitation in a filing with the U.S. Securities and Exchange Commission, the disclosing Party shall provide copies of the disclosure reasonably in advance (at least [***] ([***]) [***] for the [***] the [***] ) of such filing or other disclosure for the non-disclosing Party’s prior review and comment.  The first approval of the contents of a press release or public disclosure shall constitute permission to use such contents subsequently without submission of the press release or public disclosure to the other Party for approval.

7.3          Legally Required Disclosures .  If the receiving Party or any of its representatives is required by Applicable Law or by order of a court of law, administrative agency, or other governmental body to disclose any of the Confidential Information of the other Party, the receiving Party will (a) promptly provide the disclosing Party with reasonable advance written notice to enable the disclosing Party the opportunity to seek, where appropriate, a protective order or to otherwise prevent or limit such legally required disclosure, (b)  [***] to cooperate with the disclosing Party to obtain such protection, and (c) disclose only the legally required portion of the Confidential Information.  Any such legally required disclosure will not relieve the receiving Party from its obligations under this Agreement to otherwise limit the disclosure and use of such information as Confidential Information.

7.4          Confidential Terms .  Except as expressly provided herein, each Party agrees not to disclose the existence or any terms of this Agreement to any Third Party without the consent of the other Party; provided, however, that disclosures may be made on a strict need to know basis to actual or prospective investors, acquirers, financing sources or licensees, or to a Party’s accountants, attorneys and other professional advisors, subject to reasonable obligations of confidentiality.  If this Agreement must be publicly filed to comply with Applicable Laws or regulations or rules of a securities exchange, including as required in connection with a public offering of a Party’s stock or to comply with regulations imposed by the United States Securities and Exchange Commission, NASDAQ or stock exchange disclosure requirements, then the Party filing the Agreement shall use reasonable efforts to seek confidential treatment of the Agreement and shall seek the review and comment of the other Party with respect to proposed redactions.

7.5          Regulatory Disclosures .  With respect to a Product, each of the Parties agrees to share, upon request, its relevant data from laboratory, preclinical and clinical studies conducted in support of the Regulatory Submissions made in connection with the Development, approval

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

69

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

and Commercialization of such Product with the other Party and its Affiliates and Sublicensees [***] , provided, however, that any data so transferred shall be used by the receiving Party and its Affiliates and Sublicensees solely for such Regulatory Approval purposes or as otherwise authorized under this Agreement.  Except as set forth in the preceding sentence, if an Affiliate or Sublicensee of a Party shall fail to agree to a reciprocal data sharing arrangement to the extent such Affiliate or Sublicensee’s data is necessary for purposes of this Agreement, such Affiliate or Sublicensee, as the case may be, shall not be entitled to receive the data of the other Party or its Affiliates or Sublicensees.  Each Party agrees to grant to the other the right to reference any regulatory filing made by such Party with regard to a Product or any Regulatory Approval received by a Party with regard to a Product as the other Party believes may be useful or necessary for it to obtain Regulatory Approval to Commercialize such Product, in accordance with the terms of this Agreement.

7.6          Publications .  Each Party shall submit to the JSC for review and approval all proposed academic, scientific and medical publications and public presentations relating to a Product or any Development Activities under this Agreement for review in connection with preservation of related patent rights, and trade secrets to determine whether Confidential Information should be modified or deleted from the proposed publication or public presentation and to ensure compliance with the publications policy adopted by the JSC (the “ Publications Policy ”). Written copies of such proposed publications and presentations shall be submitted to the JSC no later than [***] ( [***] ) [***] before submission for publication or presentation and the JSC shall provide its comments with respect to such publications and presentations within [***] ( [***] ) [***] of its receipt of such written copy.  The review period may be extended for an additional [***] ( [***] ) [***] if a representative of the non-publishing Party on the JSC can demonstrate a reasonable need for such extension including, but not limited to, the preparation and filing of patent applications.  By mutual agreement of the Parties, this period may be further extended.  The first approval of the contents of a proposed academic, scientific or medical publication or public presentation relating to a Product or any Development Activities under this Agreement shall, in each case, constitute permission to use such contents subsequently without submission to the other Party for approval.

7.7          Prior Confidentiality Agreements .  The Parties are parties to a Mutual Confidential Disclosure Agreement dated [***] (the “ Prior Confidentiality Agreement ”). This Agreement, including this Article 7 , shall supersede the Prior Confidentiality Agreement. All Confidential Information (as that term is defined in the Prior Confidentiality Agreement) disclosed pursuant to the Prior Confidentiality Agreement shall be considered Confidential Information under this Agreement, subject to the exceptions in Section 1.30 .

7.8          Destruction of Confidential Information .  Each Party shall destroy, at the other Party’s instruction, all Confidential Information of the other Party in its possession upon termination or expiration of this Agreement, or at the disclosing Party’s election and written request.  The receiving Party shall provide a written confirmation of such destruction within [***] ([***]) [***] after such destruction; provided that the foregoing shall not apply to any Confidential Information that is necessary to allow such Party to perform its obligations or exercise any of its rights that expressly survive the termination or expiration of this Agreement,

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

70

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

and each Party shall be permitted to retain one copy of all Confidential Information for purposes of determining its obligations under this Agreement.

ARTICLE 8.
INDEMNIFICATION AND LIMITATION OF LIABILITY

8.1          Mylan Indemnification .  Mylan agrees to defend the Momenta Indemnitees, at Mylan’s cost and expense, and will indemnify and hold harmless the Momenta Indemnitees from and against Losses arising or resulting from any Claims against a Momenta Indemnitee arising or resulting from the Fault of Mylan or its Affiliates.  Mylan’s obligation to indemnify the Momenta Indemnitees pursuant to this Section 8.1 for the Fault of Mylan shall be subject to apportionment in accordance with Section 8.3 .  As used herein, for the avoidance of doubt, Mylan’s obligation to indemnify the Momenta Indemnitees pursuant to this Section 8.1 shall not apply to any Enforcement Litigation or Other Collaboration Litigation, and the Parties’ respective rights and obligations with respect to any such Enforcement Litigation or Other Collaboration Litigation shall be governed exclusively by Article 5 .  If any such Claim against any Momenta Indemnitee arises, Momenta shall promptly notify Mylan in writing of the Claim and Mylan shall manage and control, at its sole expense, the defense of the Claim and its settlement.  Notwithstanding the foregoing, no settlements shall be finalized with respect to such Claim without obtaining Momenta’s prior written consent, [***] or [***] , except that in the case of a settlement that does not require an admission or action on the part of Momenta, and does not harm Momenta or its ability to comply with its obligations hereunder, Momenta’s consent shall not be required so long as Momenta is unconditionally released from all liability in such settlement.  Momenta shall cooperate with Mylan and may, [***] and [***] , be represented in any such action or proceeding.  Mylan shall not be liable for any settlements, litigation costs or expenses incurred, or admissions made, by Momenta Indemnitees without Mylan’s written authorization.

8.2          Momenta Indemnification .  Momenta agrees to defend Mylan and its Affiliates, and their respective agents, directors, officers and employees (the “ Mylan Indemnitees” ), at Momenta’s cost and expense, and will indemnify and hold harmless the Mylan Indemnitees from and against Losses arising or resulting from any Claims against a Mylan Indemnitee arising or resulting from the Fault of Momenta or its Affiliates.  Momenta’s obligation to indemnify the Mylan Indemnitees pursuant to this Section 8.2 for the Fault of Momenta shall be subject to apportionment in accordance with Section 8.3 .  For the avoidance of doubt, Momenta’s obligation to indemnify the Mylan Indemnitees pursuant to this Section 8.2 shall not apply to any Enforcement Litigation or other Collaboration Litigation, and the Parties’ respective rights and obligations with respect to any such Enforcement Litigation or other Collaboration Litigation shall be governed exclusively by Article 5 . If any such Claim against any Mylan Indemnitee arises, Mylan shall promptly notify Momenta in writing of the Claim, and Momenta shall manage and control, at its sole expense, the defense of the Claim and its settlement.  Notwithstanding the foregoing, no settlements shall be finalized with respect to such Claim without obtaining Mylan’s prior written consent, [***] or [***] , except that in the case of a settlement that does not require an admission or action on the part of Mylan, and does not harm Mylan or its ability to comply with its obligations hereunder, Mylan’s consent shall not be

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

71

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

required so long as Mylan is unconditionally released from all liability in such settlement.  Mylan shall cooperate with Momenta and may, [***] and [***] , be represented in any such action or proceeding.  Momenta shall not be liable for any settlements, litigation costs or expenses incurred, or admissions made, by Mylan Indemnitees without Momenta’s written authorization.

8.3          Apportionment .  If any Losses are indemnifiable pursuant to both Section 8.1 and Section 8.2 by reason of or result from the joint Fault of Mylan and Momenta for such Losses, then such Losses shall be apportioned between Mylan and Momenta according to the relative Fault attributable to each Party (as determined in accordance with the procedures set forth in Section 12.11).

8.4          Other Claims .  In the event of any Claims that result in Losses being incurred by any Mylan Indemnitee or any Momenta Indemnitee, where such Claims and associated Losses: (a) are not within the indemnification obligations described in Section 2.4(f)(v)(4), Section 8.1 or Section 8.2 ; (b) do not arise or result from the Fault of a Party or its Affiliates; and (c) arise as a result of the Development, Manufacture or Commercialization activities conducted by either Party on or after the Effective Date with respect to any Product in the Territory, each Party shall be responsible for its Allocable Legal Expense Share of such Losses, regardless of which Party’s indemnitees initially bear such Losses.  Appropriate indemnification or reimbursement shall be made by the Party bearing less than its Allocable Legal Expense Share to the other Party to effect the foregoing allocation of applicable Losses.  If any such Claim arises, the Party against which (or against whose indemnitees) such Claim is brought shall promptly notify the other Party in writing of the Claim, and the [***] shall manage and control the defense of such Claim and its settlement (the “ Defending Party ”).  In the event that the [***] fails to agree with respect to which Party shall be the Defending Party, the [***] shall be the Defending Party and shall manage and control, [***], the defense of the Claim and its settlement.  Notwithstanding the foregoing, no settlements shall be finalized without obtaining the other Party’s (the “ Non-Defending Party ”) prior written consent, [***] or [***] , except that in the case of a settlement that does not require an admission or action on the part of the Non-Defending Party, and does not harm the Non-Defending Party or its ability to comply with its obligations hereunder, the Non-Defending Party’s consent shall not be required so long as it is unconditionally released from all liability in such settlement.  The Non-Defending Party shall cooperate with Defending Party and may, [***] and [***] , be represented in any such action or proceeding.

8.5          Insurance .  Each Party shall maintain insurance (which may [***] ), including product liability insurance, with respect to its activities under this Agreement.  Such insurance [***] shall be in such amounts and subject to such deductibles as are prevailing in the industry from time to time; provided that, each Party shall maintain a minimum of an aggregate of [***] Dollars ($ [***] ) in general comprehensive liability insurance and an aggregate of: (a)  [***] Dollars ($ [***] ) in product liability insurance until [***] and (b)  [***] Dollars ($ [***] ) in product liability insurance no later than [***] ( [***] ) [***] following [***] .  Each Party shall provide written proof of the existence of such insurance to the other Party upon request.  For clarity, [***] shall have the right to [***] the [***] required under this Section 8.5 by [***] of [***] and [***] and may [***] or [***] of the required coverage through its [***] .  Further, each

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

72

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

Party sponsoring any clinical trials of the Products shall maintain clinical trial insurance that is in compliance with the local laws of each country in which such clinical trials are being completed.

8.6          No Consequential Damages .  UNLESS RESULTING FROM A PARTY’S FRAUD OR FROM A PARTY’S BREACH OF SECTION 6.5 OR ARTICLE 7 , NO PARTY WILL BE LIABLE TO THE OTHER PARTY OR ITS AFFILIATES FOR SPECIAL, INCIDENTAL, CONSEQUENTIAL, EXEMPLARY, PUNITIVE, MULTIPLE OR OTHER INDIRECT DAMAGES ARISING OUT OF THIS AGREEMENT OR THE EXERCISE OF ITS RIGHTS HEREUNDER, OR FOR LOSS OF PROFITS, LOSS OF DATA OR LOSS OF USE DAMAGES ARISING FROM OR RELATING TO ANY BREACH OF THIS AGREEMENT WHETHER BASED UPON WARRANTY, CONTRACT, TORT, STRICT LIABILITY OR OTHERWISE, REGARDLESS OF ANY NOTICE OF SUCH DAMAGES.  NOTHING IN THIS SECTION 8.6 IS INTENDED TO LIMIT OR RESTRICT THE INDEMNIFICATION RIGHTS OR OBLIGATIONS OF ANY PARTY UNDER THIS AGREEMENT.

ARTICLE 9.
EXPORT

9.1          General .  The Parties acknowledge that the exportation from the U.S. of materials, products and related technical data (and the re-export from elsewhere of U.S. origin items) may be subject to compliance with U.S. export laws, including without limitation the U.S. Bureau of Export Administration’s Export Administration Regulations, the Federal Food, Drug and Cosmetic Act and regulations of the FDA issued thereunder, and the U.S. Department of State’s International Traffic and Arms Regulations which restrict export, re-export, and release of materials, products and their related technical data, and the direct products of such technical data.  The Parties agree to comply with all exports laws and to commit no act that, directly or indirectly, would violate any U.S. law, regulation, or treaty, or any other international treaty or agreement, relating to the export, re-export, or release of any materials, products or their related technical data to which the U.S. adheres or with which the U.S. complies.

9.2          Delays .  The Parties acknowledge that they are not responsible for any delays attributable to export controls that are beyond the reasonable control of either Party.

9.3          Assistance .  The Parties agree to provide assistance to one another in connection with each Party’s efforts to fulfill its obligations under this Article 9 , at the reasonable request and expense of the Party receiving such assistance.

9.4          Other .  The Parties agree not to export, re-export, or release any item that may be used in the design, development, production, stockpiling or use of chemical or biological weapons in or by a country listed in Country Group D:3 of Part 370 to Title 15 of the U.S. Code of Federal Regulations as it may be updated from time to time.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

73

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

ARTICLE 10.
TERM AND TERMINATION

10.1        Term .  The term of this Agreement (the “ Term ”) shall commence on the Execution Date, unless earlier terminated as provided in this Article 10 or in Section 12.12 (the date of any such termination, the “ Termination Date ”), shall continue in full force and effect, on a Product-by-Product basis, until such time as both Momenta and Mylan have ceased, for a continuous period of two (2) years, Developing and Commercializing such Product pursuant to this Agreement, themselves or through their respective Affiliates or Sublicensees, at which time this Agreement shall expire in its entirety with respect to such Product.

10.2        Termination for Convenience .  Either Party has the right to terminate this Agreement in whole or on a Product-by-Product or country-by-country basis at will at any time during the time periods described below by providing written notice to the other Party.

(a)           Termination Resulting from a Decision Not to Continue Under Section 2.6(a) .  If a Party elects not to continue Development, Manufacture and Commercialization of a Product under Section 2.6(a), the Agreement shall terminate with respect to such Product effective upon delivery of written notice from such Party to the other Party of such election.

(b)           Termination following IND Acceptance .  If a Party elects to terminate the Agreement with respect to a Product prior to [***] ( [***] ) [***] after IND Acceptance of such Product (other than in connection with termination pursuant to Section  [***] ), the terminating Party shall provide [***] ( [***] ) [***] prior written notice to the other Party.

(c)           Termination Prior to Additional Clinical Trial or FDA Determination that Additional Clinical Trial is Not Required.   If a Party elects to terminate the Agreement with respect to a Product more than [***] ( [***] ) [***] following IND Acceptance of such Product but before there is the first dosing in humans in an Additional Clinical Trial for such Product or an FDA determination that an Additional Clinical Trial is not required, such Party shall provide [***] ( [***] ) [***] prior written notice to the other Party.

(d)           Termination After Additional Clinical Trial Initiation .  If a Party elects to terminate the Agreement with respect to a Product at any time following the first dosing in humans in an Additional Clinical Trial for such Product, such Party shall provide [***] ( [***] ) [***] prior written notice to the other Party.

(e)           Partial Termination .  If a Party elects to terminate the Agreement with respect to one or more Products under this Section 10.2, the Parties’ rights and obligations with respect to such Product will be as set forth in Section 10.6 .

10.3        Termination for Competitive Product .

(a)           Competing Product Termination .  Either Party may terminate this Agreement with respect to a Product on a country-by-country basis on [***] ( [***] ) [***] prior

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

74

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

written notice to the other Party, if the non-terminating Party or its Affiliates are in breach of Section 6.5 with respect to such country and do not cure such breach within such [***] ( [***] ) [***] period.

(b)           Patent Challenge .  Each Party may terminate this Agreement (solely on a Product-by-Product basis) on [***] ( [***] ) [***] notice, with the termination being effective on the delivery of a second notice by the terminating Party to the non-terminating Party, if the non-terminating Party or its Affiliates or Sublicensees (directly or indirectly, individually or in association with any other Person) challenges the validity, enforceability or scope of any Patent Rights of the terminating Party (i.e., Momenta Patent Rights or Mylan Patent Rights, as applicable) or any of the Collaboration Patent Rights that, in either case, Cover a Product solely for the purpose of performing Legal Clearance Activities for such Product, and does not withdraw such challenge within the [***] ( [***] )- [***] notice period, or in the event that a Sublicensee is challenging, terminate the Sublicense to such Sublicensee with respect to such Product.  Notwithstanding anything to the contrary in this Agreement, neither Party may use (and each Party shall ensure that none of its Affiliates or Sublicensees use) any of the other Party’s Confidential Information acquired in the course of the Collaboration in any proceeding that challenges the validity, enforceability or scope of any of the other Party’s Patent Rights or any Collaboration Patent Rights.

10.4        Termination of Agreement for Breach of Material Obligation .  Each Party shall have the rights to terminate the Agreement in whole or on a Product-by-Product basis, as well on a country-by-country basis, for breach of material obligations hereunder by the other Party, as follows:

(a)           Subject to Section 10.4(c) , if a Party has breached any of its material obligations under this Agreement, the other Party shall have the right, but not the obligation, to terminate this Agreement if such breach continues for a period of [***] ( [***] ) [***] after written notice of such breach and the intent to terminate is provided to the breaching Party by the terminating Party.  Notwithstanding the foregoing, if a Party disputes a breach alleged pursuant to this Section 10.4(a) , the period to cure such breach shall be tolled until such dispute is resolved in accordance with Section 12.11 .

(b)           If an alleged breach pertains to a failure to exercise Commercially Reasonable Efforts, the [***] ( [***] ) [***] notice period in paragraph (a) above shall be extended to allow the Parties to undertake the following additional resolution process:

(i)            Within [***] ( [***] ) [***] after a Party (the “Alleging Party”) alleges a failure of the other Party to exercise Commercially Reasonable Efforts (the “Alleged Breaching Party”), the Alleged Breaching Party shall provide a [***] the Alleged Breaching Party either is using Commercially Reasonable Efforts to perform its obligations under the Agreement or will within the next [***] ( [***] ) [***] be performing its obligations in accordance with its duty to exercise Commercially Reasonable Efforts.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

75

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(ii)           If the Alleging Party is [***] that the [***] the allegations, then the Alleging Party can elect to proceed under paragraph (a) without further resolution under this paragraph (b).

(c)           If: (i) the U.S. is a Breached Country with respect to a Product; or (ii) there are two (2) or more Breached Countries with respect to the applicable Product, then Momenta shall have the right to terminate this Agreement, solely with respect to such Product, in the entire Territory pursuant to Section 10.4(b) .  A “Breached Country” means any Major Country in which Mylan fails to meet any of its material Commercialization diligence obligations described in Section 2.4(a)  or in the first sentence of Article 2 .  Other than as set forth above in this paragraph (c), in the event that Momenta provides notice pursuant to paragraph (a) or paragraph (b) above and the breach that is the subject of such notice is specific to one (1) or more Products or one (1) or more countries in the Territory, Momenta shall have the right to terminate in accordance with paragraph (a) solely with respect to such Product(s) or country(ies) with respect to which such breach occurred, and not in its entirety.

10.5        Termination for Bankruptcy .  To the extent permitted under Applicable Law, either Party may terminate this Agreement immediately upon written notice to the other Party, if, at any time: (a) the other Party files in any court or agency pursuant to any statute or regulation of any state or country, a petition in bankruptcy or insolvency or for reorganization or for an arrangement or for the appointment of a receiver or trustee of the Party or of substantially all of its assets; (b) the other Party is served with an involuntary petition against it, filed in any insolvency proceeding, and such petition shall not be dismissed within [***] ( [***] ) [***] after the filing thereof; (c) the other Party shall propose or be a party to any dissolution or liquidation; or (d) the other Party shall make an assignment of substantially all of its assets for the benefit of creditors.  The Parties shall retain and may fully exercise all of their respective rights and elections under the Bankruptcy Code.

10.6        Consequences of Termination .

(a)           Without limiting any other legal or equitable remedies that either Party may have, if, after the Effective Date, this Agreement or a Product under the Agreement is terminated by Mylan under Section 10.2 , is terminated by Momenta under Section 10.3 , is terminated by Momenta for Mylan’s material breach under Section 10.4 , is terminated by Momenta for Mylan’s bankruptcy or insolvency under Section 10.5 , the following provisions will take effect as of the effective date of such termination with respect to those Products and countries for which the Agreement has terminated:

(i)            Mylan will, [***] if requested by Momenta in writing, promptly transfer to Momenta or its designee: (A) copies of all governmental and regulatory correspondence, conversation logs, filings and approvals (and ownership of all Regulatory Approvals) [***] and [***] the Development, Manufacture or Commercialization of the terminated Product(s) in the terminated country(ies) that are in Mylan’s possession or control as of the effective date of such termination;  (B) copies of all data, reports, records and materials in Mylan’s possession or control as of the effective date of such termination that are [***] and [***] the Development, Manufacture or Commercialization of the terminated Product(s),

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

76

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

including all non-clinical and clinical data [***] the terminated Product(s) (“Mylan Data”); and (C) all records and materials in Mylan’s possession or control as of the effective date of such termination containing Confidential Information of Momenta [***] the terminated Products in the terminated country(ies); provided, however, that Mylan shall be entitled to retain one copy of all such Confidential Information for purposes of [***] and [***] , under this Agreement; and provided further, for clarity, that the transfer obligations under this Section 10.6(a) shall not require Mylan to transfer any regulatory approvals or related data or correspondence for a [***] to Momenta;

(ii)           Mylan will, as requested by Momenta in writing: (A) appoint [***] or [***] for all terminated Product-related matters involving [***] in the terminated countries; (B) serve as [***] in such matters; or (C) appoint [***] to [***] for the period of time after termination necessary to allow for an orderly transition of the Regulatory Submission or Regulatory Approval being transferred to Momenta.  Momenta agrees to use Commercially Reasonable Efforts to limit this obligation to the extent practicable under the circumstances;

(iii)          If, at the time of termination, Mylan is then-currently performing process development or Manufacturing Activities for the terminated Products, Mylan shall upon Momenta’s written request for a reasonable period of time (not to exceed [***] ( [***] ) [***] following receipt of written termination notice) and subject to Momenta’s agreement to reimburse Mylan for [***] and [***] (including [***] ) associated therewith: (A) continue to perform such process development activities or Manufacturing Activities for the terminated Product(s); and (B)  [***] to effect a transfer of such activities to Momenta or a Third Party on or before expiration of such [***] ( [***] ) [***] transition period.  If Momenta so requests, Mylan will assign to Momenta any agreements with Third Parties reasonably necessary for and primarily relating to the Development, Manufacture or Commercialization of the terminated Product(s) to which Mylan is a party to the extent permitted by the terms of such agreements; provided, however, that Mylan shall not be obligated to pay any amounts to the counterparty or to any Third Party in connection with such assignment;

(iv)          The licenses granted to Mylan and Momenta pursuant to Article 6 will terminate (except to the extent necessary to enable Mylan to perform its obligations under this Section 10.6 with respect to the terminated Products), and Mylan shall (and hereby does) grant Momenta (x) a [***] , royalty-bearing, [***] license under the Mylan Intellectual Property existing as of the date of termination and (y) a perpetual, exclusive (even as to Mylan), sublicensable license under Mylan Data generated pursuant to this Agreement and existing as of the date of termination, in each case to make, have made, use, import, offer for sale, sell and have sold the terminated Products in the Field in the terminated countries, subject to the following payment obligations with respect to a given Product.  Mylan shall not use, or authorize any other Person to use, the Mylan Data generated pursuant to this Agreement and existing as of the date of termination to Develop, Manufacture or Commercialize the terminated Products in the terminated countries.

(1)           If the Agreement is terminated prior to or in connection with the [***] for the applicable Product, Momenta shall pay to Mylan a royalty of [***] percent ( [***] %) of Net Sales of such Product.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

77

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(2)           If the Agreement is terminated after the [***] , but prior to [***] , Momenta shall pay to Mylan a royalty of [***] percent ( [***] %) of Net Sales of such Product.

(3)           If the Agreement is terminated after [***], but prior to the [***] of such Product, Momenta shall pay to Mylan a royalty of [***] percent ([***]%) of Net Sales of such Product.

(4)           If the Agreement is terminated after the [***] of such Product, but prior to [***] such Product, Momenta shall pay to Mylan a royalty of [***] percent ( [***] %) of Net Sales of such Product.

(5)           If the Agreement is terminated after the Launch of such Product, Momenta shall pay to Mylan a royalty of [***] percent ( [***] %) of Net Sales of such Product.

The royalties due under Section 10.6(a)(iv)(1) — (5)  shall be determined on a country-by-country and Product-by-Product basis beginning from the First Commercial Sale of such Product in such country until the later of: (A) expiration of the last-to-expire of the Mylan Patent Rights in such country covering such Product; or (B)  [***] ( [***] ) [***] after the First Commercial Sale of such Product in such country.

(v)           Mylan will, upon Momenta’s written request, assign to Momenta all right, title and interest in the trademark(s) specific to the terminated Products in the terminated country(ies) and all goodwill associated therewith; provided that such assignment shall not include any Mylan corporate trademark or logo, or any derivative mark or variation thereof;

(vi)          Mylan will, as requested by Momenta in writing and at Momenta’s sole cost and expense, reasonably cooperate with Momenta, (1) either to transition all Clinical Development activities initiated prior to the Termination Date with respect to the terminated Products or to wind-down and end such Clinical Development activities; or (2) transition the Manufacturing process for the terminated Products to Momenta or its designee;

(vii)         A Party owing an amount pursuant to Section 10.6(c)  shall submit payment to the other Party pursuant to Section 10.6(c) , if applicable;

(viii)        Mylan will, at Momenta’s request and [***] and [***] (including [***] , except to the extent [***] as [***] ) pursuant to a separate agreement to be negotiated by the Parties at the time of termination, transfer to Momenta all inventory of terminated Product in its possession as of the date of termination intended for Commercialization in the terminated country(ies).

In addition, Momenta shall reimburse Mylan for [***] and [***] associated with the performance of the activities under subsections (i), (ii), (iii)  and (vi) , above; and

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

78

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

(ix)          Mylan shall ensure that its Affiliates and permitted Sublicensees shall perform the obligations of Mylan under subsections (i) — (viii)  where the power to perform such obligation is possessed or controlled by Mylan’s Affiliates and permitted Sublicensees and not otherwise by Mylan.

(b)           Without limiting any other legal or equitable remedies that either Party may have, if, after the Effective Date, this Agreement or a Product under the Agreement is terminated by Momenta under Section 10.2 , is terminated by Mylan under Section 10.3 , is terminated by Mylan as a result of a material breach by Momenta under Section 10.4 , is terminated by Mylan for Momenta’s bankruptcy or insolvency under Section 10.5 , the following provisions will take effect as of the effective date of such termination with respect to those Products and those countries for which the Agreement has terminated:

(i)            Momenta will, [***] , promptly transfer to Mylan or its designee: (A) copies of all governmental and regulatory correspondence, conversation logs, filings and approvals (and ownership of all Regulatory Approvals) [***] and [***] the Development, Manufacture or Commercialization of the terminated Product(s) in the terminated country(ies) that are in Momenta’s possession or control as of the effective date of such termination; (B) copies of all data, reports, records and [***] materials in Momenta’s possession or control as of the effective date of such termination that are [***] and [***] the Development, Manufacture or Commercialization of the terminated Product(s), including all non-clinical and clinical data relating to the terminated Product(s), (“Momenta Data”) and [***] ; and (C) all records and materials in Momenta’s possession or control as of the effective date of such termination containing Confidential Information of Mylan [***] the terminated Products; and provided further, for clarity, that the transfer obligations under this Section 10.6(b) shall not require Momenta to transfer any regulatory approvals or related data or correspondence for a [***] to Mylan;

(ii)           Momenta will, as requested by Mylan in writing: (A) appoint [***] or [***] for all terminated Product-related matters involving [***] in the terminated countries; (B) serve as [***] in such matters; or (C) appoint [***] for the period of time after termination necessary to allow for an orderly transition of the Regulatory Submission or Regulatory Approval being transferred to Mylan.  Mylan agrees to use Commercially Reasonable Efforts to limit this obligation to the extent practicable under the circumstances;

(iii)          If, at the time of termination, Momenta is then-currently performing process development or Manufacturing Activities for the terminated Products, Momenta shall upon Mylan’s written request for a reasonable period of time (not to exceed [***] ([***]) [***] following receipt of written termination notice) and subject to Mylan’s agreement to reimburse Momenta for [***] and [***] and [***] (including [***] ) associated therewith: (A) continue to perform such process development activities or Manufacturing Activities for the terminated Product(s); and (B)  [***] to effect a transfer of such activities to Mylan or a Third Party on or before expiration of such [***] ( [***] ) [***] transition period.  If Mylan so requests, Momenta will assign to Mylan any agreements with Third Parties reasonably necessary for and primarily relating to the Development, Manufacture or Commercialization of the terminated Product(s) to which Momenta is a party to the extent permitted by the terms of such agreements;

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

79

Confidential Treatment Requested by Momenta Pharmaceuticals, Inc.

provided, however, that Momenta shall not be obligated to pay any amounts to the counterparty or to any Third Party in connection with such assignment;

(iv)          Momenta will, as requested by Mylan in writing and [***] and [***] , reasonably cooperate with Mylan, (1) either to transition all Clinical Development activities initiated prior to the Termination Date with respect to the terminated Products or to wind-down and end such Clinical Development activities or (2) transition the Manufacturing process for the terminated Products to Mylan or its designee;

(v)           A Party owing an amount pursuant to Section 10.6(c)  shall submit payment to the other Party pursuant to Section 10.6(c) , if applicable; and

(vi)          The licenses granted to Mylan and Momenta pursuant to Article 6 will terminate (except to the extent necessary to enable Mylan to perform its obligations under this Section 10.6 with respect to the terminated Products), and Momenta shall (and hereby does) grant Mylan (x) a [***] , royalty-bearing, [***] license under the Momenta Intellectual Property existing as of the date of termination and (y) a perpetual, exclusive (even as to Momenta), sublicensable license under Momenta Data generated pursuant to this Agreement and existing as of the date of termination, in each case to make, have made, use, import, offer for sale, sell and have sold the terminated Products in the Field in the terminated countries, subject to the following payment obligations with respect to a given Product.  Momenta shall not use, or authorize any other Person to use, the Momenta Data generated pursuant to this Agreement and existing as of the date of termination to Develop, Manufacture or Commercialize the terminated Products in the terminated countries.

(1)           If the Agreement is terminated prior to or in connection with the [***] for the applicable Product, Mylan shall pay to Momenta a royalty of [***] percent ( [***] %) of Net Sales of such Product.

(2)           If the Agreement is terminated after the [***] , but prior to [***] , Mylan shall pay to Momenta a royalty of [***] percent ( [***] %) of Net Sales of such Product.

(3)           If the Agreement is terminated after [***] , but prior to the [***] of such Product, Mylan shall pay to Momenta a royalty of [***] percent ( [***] %) of Net Sales of such Product.

(4)           If the Agreement is terminated after the [***] of such Product, but prior to the [***] of such Product, Mylan shall pay to Momenta a royalty of [***] percent ( [***] %) of Net Sales of such Product.

(5)           If the Agreement is terminated after the Launch of such Product, Mylan shall pay to Momenta a royalty of [***] percent ( [***] %) of Net Sales of such Product.

Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission.

80