Exhibit 4.1

EXECUTION COPY

WARRANT AGREEMENT

Dated as of May 25, 2012

among

KINDER MORGAN, INC.,

COMPUTERSHARE INC.

and

COMPUTERSHARE TRUST COMPANY, N.A.,

as Warrant Agent

Warrants for

Common Stock

TABLE OF CONTENTS

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Exhibit A – Form of Warrant Certificate

Exhibit B – Form of Warrant Statement

Exhibit C – Form of Notice of Exercise

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WARRANT AGREEMENT (this “ Agreement ”), dated as of May 25, 2012, among Kinder Morgan, Inc., a Delaware corporation (the “ Company ”), Computershare Inc., a Delaware corporation and its wholly owned subsidiary, Computershare Trust Company, N.A., a federally chartered, limited purpose trust company (collectively, the “ Warrant Agent ” or individually, “ Computershare ” and the “ Trust Company ,” respectively).

WHEREAS, the Company, Sherpa Merger Sub, Inc., a Delaware corporation, Sherpa Acquisition, LLC, a Delaware limited liability company, El Paso Corporation, a Delaware corporation (formerly Sirius Holdings Merger Corporation) (“ El Paso ”), and El Paso LLC, a Delaware limited liability company (formerly a Delaware corporation known as El Paso Corporation and successor in interest to Sirius Merger Corporation), entered into an Agreement and Plan of Merger, dated as of October 16, 2011 (the “ Merger Agreement ”), providing for, among other things, the acquisition of El Paso by the Company through the consummation of the Transactions (as defined in the Merger Agreement), as a result of which, El Paso will become a wholly owned subsidiary of the Company;

WHEREAS, in partial consideration of the merger and other transactions contemplated by the Merger Agreement, the Company has agreed to issue warrants (each, a “ Warrant ” and collectively, the “ Warrants ”) to purchase shares of Class P common stock, par value $0.01 per share, of the Company (the “ Common Stock ”), to the stockholders of El Paso;

WHEREAS, the Company desires that the Warrant Agent act on behalf of the Company, and the Warrant Agent is willing to so act, in connection with the issuance, transfer, exchange, replacement, cancellation and exercise of the Warrants; and

WHEREAS, the Company desires to provide for the form and provisions of the Warrants, the terms upon which the Warrants shall be issued and exercised and the respective rights and obligations of the Company, the Warrant Agent and the registered owners of the Warrants (each, a “ Holder ” and collectively, the “ Holders ”).

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration given to each party hereto, the receipt of which is hereby acknowledged, the Company and the Warrant Agent agree as follows:

ARTICLE I

ISSUANCE AND EXERCISE OF WARRANTS

SECTION 1.1 Form of Warrant. Each Warrant shall be in either (i) physical certificated form substantially in the form attached hereto as Exhibit A ; provided , however, that no Warrant may be issued in physical certificated form without the prior written consent of the Company (each, a “ Warrant Certificate ” and collectively, “ Warrant Certificates ”) or (ii) book-entry registration on the books and records of the Warrant Agent, which book-entry registration shall be reflected on warrant statements, substantially in the form attached hereto as Exhibit B (each, a “ Warrant Statement ” and collectively, the “ Warrant Statements ”). Each Warrant Certificate and Warrant Statement, as applicable, shall have such insertions as are required or permitted by this Agreement and may have such letters, numbers or other marks of identification and such legends and endorsements, stamped, printed, lithographed

or engraved thereon, as may be required to comply with this Agreement, any applicable law or any rule of any securities exchange on which the Warrants may be listed. Each Warrant Certificate and Warrant Statement, as applicable, shall have attached thereto or be accompanied by, if and when provided to any Holder, a notice of exercise in the form attached hereto as Exhibit C (a “ Notice of Exercise ”). Each Warrant Certificate shall be executed on behalf of the Company by its Chairman of the Board of Directors, Chief Executive Officer, Chief Financial Officer or one of its Executive Vice Presidents, under its corporate seal reproduced thereon and attested by its Secretary or an Assistant Secretary. The signature of any such officers on the Warrant Certificates may be manual or facsimile. Warrant Certificates bearing the manual or facsimile signatures of individuals who were at any time the proper officers of the Company shall bind the Company, notwithstanding that such individuals or any one of them shall have ceased to hold such offices prior to the delivery of such Warrants or did not hold such offices on the date of this Agreement.

SECTION 1.2 Countersignature of Warrant Certificates. Each Warrant Certificate, to the extent issued, shall be countersigned by the Warrant Agent (or any successor to the Warrant Agent then acting as warrant agent under this Agreement) by manual or facsimile signature and shall not be valid for any purpose unless and until so countersigned. Warrant Certificates, to the extent issued, may be countersigned and delivered, notwithstanding the fact that the persons or any one of them who countersigned the Warrants shall have ceased to be proper signatories prior to the delivery of such Warrants or were not proper signatories on the date of this Agreement. Each Warrant Certificate, to the extent issued, shall be dated as of the date of its countersignature by the Warrant Agent. The Warrant Agent’s countersignature shall be conclusive evidence that the Warrant Certificate so countersigned has been duly authenticated and issued under this Agreement.

SECTION 1.3 Exercise Number; Exercise Price. Each Warrant initially entitles its Holder to purchase from the Company one (1) (the “ Exercise Number ”) share of Common Stock (such share or shares of Common Stock issued or issuable upon exercise of any Warrant or Warrants, each, a “ Warrant Share ” and collectively, the “ Warrant Shares ”) for a purchase price per share of Common Stock of $40.00 (the “ Exercise Price ”). The Exercise Number and the Exercise Price are subject to adjustment as provided in Article II, and all references to “Exercise Number” and “Exercise Price” in this Agreement shall be deemed to include any such adjustment or series of adjustments.

SECTION 1.4 Term of Warrants. All or a portion of the Warrants are exercisable by the Holder at any time and from time to time on or after the date of this Agreement until 5:00 p.m., New York City time, on the five (5)-year anniversary of the date of this Agreement (the “ Expiration Date ”).

SECTION 1.5 Exercise of Warrants. (i) In the case of a Holder who holds Warrant Certificates, a Warrant may be exercised by surrender of the Warrant Certificate or Certificates evidencing such Warrant to be exercised and by delivery to the Warrant Agent (or to such other office or agency of the Company in the United States as the Company may designate by notice in writing to the Holders pursuant to Section 4.1) a Notice of Exercise, duly completed and signed, which signature shall be guaranteed by a member of a recognized guarantee medallion program, together with payment of the Exercise Price for the

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Warrant Shares thereby purchased in accordance with Section 1.6 and (ii) in the case of a Holder who holds Book-Entry Warrants, a Warrant may be exercised by delivery to the Warrant Agent (or to such other office or agency of the Company in the United States as the Company may designate by notice in writing to the Holders pursuant to Section 4.1) a Notice of Exercise, duly completed and signed, which signature shall be guaranteed by a member of a recognized guarantee medallion program, together with payment of the Exercise Price for the Warrant Shares thereby purchased in accordance with Section 1.6. As promptly as practicable after receiving a Notice of Exercise to purchase Warrant Shares, the Warrant Agent shall notify the Company.

SECTION 1.6 Payment of Exercise Price. Payment of the aggregate Exercise Price for all Warrant Shares purchased may be made, at the option of the Holder, either (a) by certified or official bank check payable to Computershare or (b) by delivering a written direction to the Warrant Agent that the Holder desires to exercise the Warrants pursuant to a “cashless exercise,” in which case the Holder will receive a number of Warrant Shares that is equal to the aggregate number of Warrant Shares for which the Warrants are being exercised less the number of Warrant Shares that have an aggregate Market Price on the trading day on which such Warrants are exercised that is equal to the aggregate Exercise Price for such Warrant Shares. For the avoidance of doubt, if Warrants are exercised such that the aggregate Exercise Price would exceed the aggregate value (as measured by the Market Price) of the Warrant Shares issuable upon exercise, no amount shall be due and payable by the Holder to the Company, and such exercise shall be null and void and no Warrant Shares shall thereupon be issued and the Warrants shall continue in effect.

The Company acknowledges that the bank accounts maintained by Computershare in connection with the services provided under this Agreement will be in its name and that Computershare may receive investment earnings in connection with the investment at Computershare’s risk and for its benefit of funds held in those accounts from time to time. Neither the Company nor the Holders will receive interest on any deposits or Exercise Price.

SECTION 1.7 Registry of Warrants. The Company or an agent duly appointed by the Company (which initially shall be the Warrant Agent) shall maintain a registry (the “ Warrant Registry ”) showing the names and addresses of the respective Registered Holders and the date and number of Warrants held by each such Registered Holder. Except as otherwise provided in this Agreement, in any Warrant Certificate or Warrant Statement, the Company and the Warrant Agent may deem and treat any Registered Holder of a Warrant as the absolute owner thereof (notwithstanding any notation of ownership or other writing thereon made by anyone).

SECTION 1.8 Exchange of Warrant Certificates. Subject to Section 1.1, each Warrant Certificate may be exchanged for another Warrant Certificate or Certificates of like tenor and representing the same aggregate number of Warrants. Any Holder desiring to exchange a Warrant Certificate or Certificates shall deliver a written request to the Warrant Agent and shall properly endorse and surrender the Warrant Certificate or Certificates to be so exchanged. Thereupon, the Warrant Agent shall countersign and deliver to the Holder a new Warrant Certificate or Certificates, as so requested, in such name or names as such Holder shall designate. Upon the request of any Holder of Book-Entry Warrants, the Warrant Agent shall deliver to the Holder a new Warrant Statement or Statements, as so requested.

SECTION 1.9 Cancellation of Warrant Certificates. If and when any Warrant Certificate has been exercised in full, the Warrant Agent shall promptly cancel such Warrant Certificate following its receipt from the Holder or, to the extent required by applicable law, retain such Warrant Certificate. Upon exercise of a Warrant Certificate in part

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and not in full, the Warrant Agent shall, subject to Section 1.1, issue and deliver or shall cause to be issued and delivered to the Holder a new Warrant Certificate or Certificates evidencing the Holder’s remaining Warrants. If requested by the Company, at the Company’s discretion, the Warrant Agent shall deliver to the Company the cancelled Warrant Certificates. The Warrant Agent and no one else may cancel Warrant Certificates surrendered for transfer, exchange, replacement, cancellation or exercise. The Company may not issue new Warrant Certificates to replace cancelled Warrant Certificates that have been exercised or purchased by it. If and when any Book Entry Warrant has been exercised, whether in part or in full, the Warrant Agent shall promptly reflect such exercise on the books and records of the Warrant Agent in book-entry form and deliver or cause to be delivered to the Holder a new Warrant Statement or Warrant Statements. For the avoidance of doubt, upon any exercise of Warrants, whether by a Holder of Book-Entry Warrants or by a Holder of Warrant Certificates, the Warrant Registry shall be updated to reflect such exercise in accordance with Section 1.7.

SECTION 1.10 No Fractional Shares or Scrip. No fractional Warrant Shares or scrip representing fractional Warrant Shares shall be issued upon any exercise of Warrants. In lieu of any fractional Warrant Shares that would otherwise be issued to a Holder upon exercise of any Warrants, such Holder shall receive a cash payment equal to the Market Price of the Common Stock on the trading day on which such Warrants are exercised representing such fractional Warrant Share.

SECTION 1.11 Lost, Stolen, Destroyed or Mutilated Warrants. If any of the Warrant Certificates shall be mutilated, lost, stolen or destroyed, the Warrant Agent shall countersign and deliver, in exchange and substitution for, and upon cancellation of the mutilated Warrant Certificate, or in lieu of and substitution for the Warrant Certificate lost, stolen or destroyed, a new Warrant Certificate of like tenor and representing an equivalent number of Warrants, but only upon receipt of evidence reasonably satisfactory to the Warrant Agent of the loss, theft or destruction of such Warrant Certificate and an affidavit and the posting of an open penalty bond satisfactory to it. Applicants for such substitute Warrant Certificates shall also comply with such other reasonable regulations and pay such other reasonable charges as the Warrant Agent may prescribe and as required by Section 8-405 of the Uniform Commercial Code as in effect in the State of Delaware.

SECTION 1.12 Transferability and Assignment. At the option of the Holder thereof, the Warrants and all rights attached thereto may be sold, assigned, transferred, pledged, encumbered or in any other manner transferred or disposed of, in whole or in part, by the Registered Holder or by duly authorized attorney, and one or more new Warrant Certificates or Warrant Statements, as applicable, shall be made and delivered and registered in the name of one or more transferees, upon surrender in accordance with Section 1.5 and upon compliance with all applicable laws and subject to the Holder’s presenting due evidence of authority to transfer which shall include a signature guarantee from an eligible guarantor institution participating in a signature guarantee program approved by the Securities Transfer Association, and any other reasonable evidence of authority that may be required by the Warrant Agent.

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SECTION 1.13 Issuance of Warrant Certificates or Warrant Statements. When any Holder, transferee of a Holder or other designee of a Holder is entitled to receive a new or replacement Warrant Certificate or Warrant Statement, as applicable, whether pursuant to Section 1.8, 1.9, 1.11 or 1.12, the Warrant Agent shall issue or shall cause to be issued such new or replacement Warrant Certificate or Warrant Statement, as applicable, as promptly as reasonably practicable.

SECTION 1.14 Issuance of Warrant Shares. Upon the exercise of any Warrants, the Warrant Agent shall deliver or shall cause to be delivered the number of full Warrant Shares to which such Holder shall be entitled, together with any cash to which such Holder shall be entitled in respect of fractional Warrant Shares pursuant to Section 1.10, as promptly as reasonably practicable. All Warrant Shares shall be issued in such name or names as the exercising Holder may designate and delivered to the exercising Holder or its nominee or nominees.

SECTION 1.15 Charges, Taxes and Expenses. The Company shall pay all documentary stamp taxes, if any, attributable to the initial issuance of Warrant Shares upon the exercise of Warrants; provided, however, the Company shall not be required to pay any tax or taxes which may be payable in respect of any transfer involved in the issue or delivery of any Warrants or certificates (if any) for Warrant Shares in a name other than that of the registered holder of such Warrants.

SECTION 1.16 Issued Warrant Shares. The Company hereby represents and warrants that all Warrant Shares issued in accordance with the terms of this Agreement will be duly and validly authorized and issued, fully paid and nonassessable and free from all taxes, liens and charges (other than liens or charges created by a Holder, income and franchise taxes incurred in connection with the exercise of the Warrant or taxes in respect of any transfer occurring contemporaneously therewith). The Company agrees that the Warrant Shares so issued will be deemed to have been issued to a Holder as of the close of business on the date on which the Warrants were duly exercised, notwithstanding that the stock transfer books of the Company may then be closed or certificates (if any) representing such Warrant Shares may not be actually delivered on such date.

SECTION 1.17 Reservation of Sufficient Warrant Shares. There have been reserved, and the Company shall at all times through the Expiration Date keep reserved, out of its authorized but unissued Common Stock, solely for the purpose of the issuance of Warrant Shares in accordance with the terms of this Agreement, a number of shares of Common Stock sufficient to provide for the exercise of the rights of purchase represented by the outstanding Warrants. The transfer agent for the Common Stock and every subsequent transfer agent for any shares of the Company’s capital stock issuable upon the exercise of any of the rights of purchase aforesaid shall be irrevocably authorized and directed at all times to reserve such number of authorized shares as shall be required for such purpose. If applicable, the Company shall supply such transfer agents with duly executed stock certificates for such purposes and shall provide or otherwise make available any cash that may be payable upon exercise of Warrants in respect of fractional Warrant Shares pursuant to Section 1.10. The Company shall furnish such transfer agent with a copy of all notices of adjustments and certificates related thereto, transmitted to each Holder pursuant to Section 4.1.

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SECTION 1.18 Registration and Listing. The Company shall register or shall cause to be registered any and all shares of its Common Stock (including the Warrant Shares) and all the Warrants under the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder, and the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder (the “ Exchange Act ”), and the Company shall use commercially reasonable efforts to maintain such registration of such shares of its Common Stock (including the Warrant Shares) and all the Warrants. The Company shall use reasonable best efforts to (a) procure, or cause to be procured, at its sole expense, the listing of the Warrant Shares and the Warrants, subject to issuance or notice of issuance, on the New York Stock Exchange or, if prior to the closing of the Merger the New York Stock Exchange will not approve the listing of the Warrants on the New York Stock Exchange, then on the NASDAQ Stock Exchange or, if prior to the closing of the Merger the NASDAQ Stock Exchange will not approve the listing of the Warrants on the NASDAQ Stock Exchange, another stock exchange reasonably agreed by the Company and El Paso, and (b) maintain such listings at all times until the Expiration Date. The Company shall use reasonable best efforts to ensure that the Warrant Shares and the Warrants may be issued without violation of any applicable law or regulation or of any requirement of any securities exchange on which such shares of its Common Stock (including the Warrant Shares) and the Warrants are listed or traded.

SECTION 1.19 No Impairment. The Company will not, and the Company will cause its subsidiaries not to, avoid or seek to avoid the observance or performance of any of the terms to be observed or performed by the Company under this Agreement. The Company shall at all times in good faith assist in the carrying out of all provisions of this Agreement and in the taking of all such action as may be necessary or appropriate in order to protect the rights of the Holders.

SECTION 1.20 CUSIP Numbers. The Company, in issuing the Warrants, may use “CUSIP” numbers (if then generally in use) and, if so, the Warrant Agent shall use “CUSIP” numbers in notices as a convenience to Holders; provided , however , that any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Warrant Certificates or Warrant Statements or as contained in any notice and that reliance may be placed only on the other identification numbers printed on the Warrant Certificates or Warrant Statements.

SECTION 1.21 Purchase of Warrants by the Company; Cancellation. The Company shall have the right, except as limited by law, other agreements or as provided herein, to purchase or otherwise acquire Warrants at such times, in such manner and for such consideration as it and the applicable Holder may deem appropriate. In the event the Company shall purchase or otherwise acquire Warrants, the same shall thereupon be delivered to the Warrant Agent and retired and, for the avoidance of doubt, if the approval of Holders is required to take any action, the Company’s (or any of its subsidiaries’ or affiliates’) ownership in any Warrants shall not be considered in calculating whether the requisite number of Warrants have approved such action.

SECTION 1.22 No Rights as Stockholders. A Warrant shall not, prior to its exercise, confer upon its Holder or such Holder’s transferee, in such Holder’s or such transferee’s capacity as a Warrant Holder, the right to vote or receive dividends, or consent or receive notice as stockholders in respect of any meeting of stockholders for the election of directors of the Company or any other matter, or any rights whatsoever as stockholders of the Company.

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ARTICLE II

ANTIDILUTION PROVISIONS

SECTION 2.1 Adjustments and Other Rights. The Exercise Price and the Exercise Number shall be subject to adjustment from time to time as provided by this Article II; provided , however , that if more than one section of this Article II is applicable to a single event, the section shall be applied that produces the largest adjustment, and no single event shall cause an adjustment under more than one section of this Article II so as to result in duplication.

SECTION 2.2 Stock Splits, Subdivisions, Reclassifications or Combinations. If the Company shall (a) declare and pay a dividend or make a distribution on its Common Stock in shares of Common Stock, (b) subdivide or reclassify the outstanding shares of Common Stock into a greater number of shares, or (c) combine or reclassify the outstanding shares of Common Stock into a smaller number of shares, the Exercise Number at the time of the record date for such dividend or distribution or the effective date of such subdivision, combination or reclassification shall be adjusted by multiplying the Exercise Number effective immediately prior to such event by a fraction (x) the numerator of which shall be the total number of outstanding shares of Common Stock immediately after such event and (y) the denominator of which shall be the total number of outstanding shares of Common Stock immediately prior to such event. In such event, the Exercise Price per share of Common Stock in effect immediately prior to the record date for such dividend or distribution or the effective date of such subdivision, combination or reclassification shall be adjusted by multiplying such Exercise Price by a fraction (i) the numerator of which shall be the Exercise Number immediately prior to such adjustment and (ii) the denominator of which shall be the new Exercise Number determined pursuant to the immediately preceding sentence.

SECTION 2.3 Other Distributions. If the Company shall fix a record date for the making of a distribution to all holders of shares of its Common Stock of securities, evidences of indebtedness, assets, cash, rights or warrants (excluding Ordinary Cash Dividends, dividends of its Common Stock and other dividends or distributions referred to in Section 2.2), in each such case, the Exercise Price in effect prior to such record date shall be reduced immediately upon occurrence of the record date to the price determined by multiplying the Exercise Price in effect immediately prior to the reduction by the quotient of (x) the Market Price of the Common Stock on the last trading day preceding the first date on which the Common Stock trades regular way on the principal national securities exchange on which the Common Stock is listed or admitted to trading without the right to receive such distribution, minus the amount of cash and/or the Fair Market Value of the securities, evidences of indebtedness, assets, rights or warrants to be so distributed in respect of one share of Common Stock (such subtracted amount and/or Fair Market Value, the “ Per Share Fair Market Value ”) divided by (y) such Market Price on such date specified in clause (x); such adjustment shall be made successively whenever such a record date is fixed. In such event, the Exercise Number shall be increased to the number obtained by multiplying the Exercise Number immediately prior

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to such adjustment by the quotient of (x) the Exercise Price in effect immediately prior to the distribution giving rise to this adjustment divided by (y) the new Exercise Price determined in accordance with the immediately preceding sentence. In the case of adjustment for a cash dividend that is, or is coincident with, a regular quarterly cash dividend, the Per Share Fair Market Value would be reduced by the per share amount of the portion of the cash dividend that would constitute an Ordinary Cash Dividend.

SECTION 2.4 Certain Repurchases of Common Stock . If the Company effects a Pro Rata Repurchase of Common Stock, then the Exercise Price shall be reduced to the price determined by multiplying the Exercise Price in effect immediately prior to the Effective Date of such Pro Rata Repurchase by a fraction of which (a) the numerator shall be (i) the product of (x) the number of shares of Common Stock outstanding immediately before such Pro Rata Repurchase and (y) the Market Price of a share of Common Stock on the trading day immediately preceding the first public announcement by the Company or any of its Affiliates of the intent to effect such Pro Rata Repurchase, minus (ii) the aggregate purchase price of the Pro Rata Repurchase, and of which (b) the denominator shall be the product of (i) the number of shares of Common Stock outstanding immediately prior to such Pro Rata Repurchase minus the number of shares of Common Stock so repurchased and (ii) the Market Price per share of Common Stock on the trading day immediately preceding the first public announcement by the Company or any of its Affiliates of the intent to effect such Pro Rata Repurchase. In such event, the Exercise Number shall be increased to the number obtained by multiplying the Exercise Number immediately prior to such adjustment by the quotient of (x) the Exercise Price in effect immediately prior to the Pro Rata Repurchase giving rise to this adjustment divided by (y) the new Exercise Price determined in accordance with the immediately preceding sentence. For the avoidance of doubt, no increase to the Exercise Price or decrease in the Exercise Number shall be made pursuant to this Section 2.4.

SECTION 2.5 Business Combinations or Reclassifications of Common Stock. In case of any Business Combination or reclassification of Common Stock (other than a reclassification of Common Stock referred to in Section 2.2), a Holder’s right to receive shares upon exercise of a Warrant shall be converted into the right to exercise such Warrant to acquire the number of shares of stock or other securities or property (including cash) that the Common Stock issuable (at the time of such Business Combination or reclassification) upon exercise of such Warrant immediately prior to such Business Combination or reclassification would have been entitled to receive upon consummation of such Business Combination or reclassification; and in any such case, if necessary, the provisions set forth herein with respect to the rights and interests thereafter of the Holder shall be appropriately adjusted so as to be applicable, as nearly as may reasonably be, to such Holder’s right to exercise a Warrant in exchange for any shares of stock or other securities or property pursuant to this section. In determining the kind and amount of stock, securities or the property receivable upon exercise of a Warrant following the consummation of such Business Combination, if the holders of Common Stock have the right to elect the kind or amount of consideration receivable upon consummation of such Business Combination, then the consideration that a Holder shall be entitled to receive upon exercise shall be deemed to be the types and amounts of consideration received by the majority of all holders of the shares of Common Stock that affirmatively make an election (or of all such holders if none make an election). For purposes of determining any amount to be withheld in the case of a “cashless exercise” pursuant to Section 1.6 from stock,

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securities or the property that would otherwise be delivered to a Holder upon exercise of Warrants following any Business Combination, the amount of such stock, securities or property to be withheld shall have a Market Price equal to the aggregate Exercise Price as to which such Warrants are so exercised, based on the fair market value of such stock, securities or property on the trading day on which such Warrants are exercised and the Notice of Exercise is delivered to the Warrant Agent; provided , however , that in the case of any property that is not a security, the Market Price of such property shall be deemed to be its fair market value as determined in good faith by the Board of Directors in reliance on an opinion of a nationally recognized independent investment banking firm retained by the Company for this purpose; provided , further , that if making such determination requires the conversion of any currency other than U.S. dollars into U.S. dollars, such conversion shall be done in accordance with customary procedures based on the rate for conversion of such currency into U.S. dollars displayed on the relevant page by Bloomberg L.P. (or any successor or replacement service) on or by 4:00 p.m., New York City time, on such exercise date.

SECTION 2.6 Rounding of Calculations; Minimum Adjustments. All calculations under this Article II shall be made to the nearest one-tenth (1/10th) of a cent or to the nearest one-hundredth (1/100th) of a share, as the case may be. Any provision of this Article II to the contrary notwithstanding, no adjustment in the Exercise Price or the Exercise Number shall be made if the amount of such adjustment would be less than $0.01 or one-tenth (1/10th) of a share of Common Stock, but any such amount shall be carried forward and an adjustment with respect thereto shall be made at the time of and together with any subsequent adjustment which, together with such amount and any other amount or amounts so carried forward, shall aggregate $0.01 or 1/10th of a share of Common Stock, or more, or on exercise of a Warrant if it shall earlier occur.

SECTION 2.7 Timing of Issuance of Additional Common Stock Upon Certain Adjustments. In any case in which the provisions of this Article II shall require that an adjustment shall become effective immediately after a record date for an event, the Company may defer until the occurrence of such event (a) issuing to a Holder of Warrants exercised after such record date and before the occurrence of such event the additional shares of Common Stock issuable upon such exercise by reason of the adjustment required by such event over and above the shares of Common Stock issuable upon such exercise before giving effect to such adjustment and (b) paying to such Holder any amount of cash in lieu of a fractional share of Common Stock; provided , however , that the Company upon request shall deliver to such Holder a due bill or other appropriate instrument evidencing such Holder’s right to receive such additional shares, and such cash, upon the occurrence of the event requiring such adjustment, subject to any retroactive readjustment in accordance with Section 2.8(b).

SECTION 2.8 Other Events; Provisions of General Applicability.

(a) Neither the Exercise Price nor the Exercise Number shall be adjusted in the event of (i) a change in the par value of the Common Stock, (ii) a change in the jurisdiction of incorporation of the Company or (iii) any conversion of shares of any other class of common stock of the Company outstanding as of the date of this Agreement into shares of Common Stock in accordance with the conversion mechanisms set forth in the Company’s certificate of incorporation as of the date of this Agreement.

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(b) In the event that any dividend or distribution described in this Article II is not so made, the Exercise Price and the Exercise Number then in effect shall be readjusted, effective as of the date when the Board of Directors determines not to distribute such shares, evidences of indebtedness, assets, rights, cash or warrants, as the case may be, to the Exercise Price and the Exercise Number that would then be in effect if such record date had not been fixed.

SECTION 2.9 Statement Regarding Adjustments. Whenever the Exercise Price or the Exercise Number shall be adjusted as provided in this Article II, the Company shall forthwith file at the principal office of the Company a statement showing in reasonable detail the facts requiring such adjustment and the Exercise Price that shall be in effect and the Exercise Number after such adjustment. The Company shall deliver to the Warrant Agent a copy of such statement and shall cause a copy of such statement to be sent or communicated to the Holders pursuant to Section 4.1.

SECTION 2.10 Notice of Adjustment Event. In the event that the Company shall propose to take any action of the type described in this Article II (but only if the action of the type described in this Article II would result in an adjustment in the Exercise Price or the Exercise Number or a change in the type of securities or property to be delivered upon exercise of a Warrant), the Company shall deliver to the Warrant Agent a notice and shall cause such notice to be sent or communicated to the Holders in the manner set forth in Section 4.1, which notice shall specify the record date, if any, with respect to any such action and the approximate date on which such action is to take place. Such notice shall also set forth the facts with respect thereto as shall be reasonably necessary to indicate the effect on the Exercise Price and the number, kind or class of shares or other securities or property which shall be deliverable upon exercise of a Warrant. In the case of any action which would require the fixing of a record date, such notice shall be given at least ten (10) days prior to the date so fixed, and in case of all other action, such notice shall be given at least fifteen (15) days prior to the taking of such proposed action. Failure to give such notice, or any defect therein, shall not affect the legality or validity of any such action.

SECTION 2.11 Proceedings Prior to Any Action Requiring Adjustment. As a condition precedent to the taking of any action which would require an adjustment pursuant to this Article II, the Company shall take any action which may be necessary, including obtaining regulatory, New York Stock Exchange, NASDAQ Stock Market or other applicable national securities exchange or stockholder approvals or exemptions, in order that the Company may thereafter validly and legally issue as fully paid and nonassessable all Warrant Shares that a Holder is entitled to receive upon exercise of a Warrant pursuant to this Article II.

SECTION 2.12 Adjustment Rules. Any adjustments pursuant to this Article II shall be made successively whenever an event referred to herein shall occur. If an adjustment in Exercise Price made under this Agreement would reduce the Exercise Price per share of Common Stock to an amount below par value of the Common Stock, then such adjustment in Exercise Price made under this Agreement shall reduce the Exercise Price per share of Common Stock to the par value of the Common Stock.

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SECTION 2.13 Prohibited Actions. The Company agrees that it will not take any action which would entitle a Holder to an adjustment of the Exercise Price if the total number of shares of Common Stock issuable after such action upon exercise of the Warrants, together with all shares of Common Stock then outstanding and all shares of Common Stock then issuable upon the exercise of all outstanding options, warrants, conversion and other rights, would exceed the total number of shares of Common Stock then authorized by its certificate of incorporation.

SECTION 2.14 Adjustment to Warrant Certificate or Warrant Statement. The form of Warrant Certificate or Warrant Statement need not be changed because of any adjustment made pursuant to this Agreement, and Warrant Certificates or Warrant Statements issued after such adjustment may state the same Exercise Price and the same Exercise Number as are stated in the Warrant Certificates or Warrant Statements initially issued pursuant to this Agreement. The Company, however, may at any time in its sole discretion make any change in the form of Warrant Certificate that it may deem appropriate to give effect to such adjustments and that does not affect the substance of the Warrant Certificate, and any Warrant Certificate thereafter issued or countersigned, whether in exchange or substitution for an outstanding Warrant Certificate or otherwise, may be in the form as so changed.

ARTICLE III

WARRANT AGENT

SECTION 3.1 Appointment of Warrant Agent. The Company hereby appoints the Warrant Agent to act as agent for the Company with respect to the Warrants and in accordance with the provisions of this Agreement, and the Warrant Agent hereby accepts such appointment.

SECTION 3.2 Liability of Warrant Agent. The Warrant Agent shall act under this Agreement solely as agent, and its duties shall be determined solely by the provisions of this Agreement. The Warrant Agent shall not be liable for anything that it may do or refrain from doing in connection with this Agreement, except for its own willful misconduct, gross negligence or bad faith.

SECTION 3.3 Performance of Duties. The Warrant Agent may execute and exercise any of the rights or powers hereby vested in it or perform any duty under this Agreement either itself or by or through its attorneys or agents (which shall not include its employees).

SECTION 3.4 Disposition of Proceeds on Exercise of Warrants. The Warrant Agent shall account as promptly as practicable to the Company with respect to Warrants exercised and shall concurrently pay to the Company all monies received by the Warrant Agent for the purchase of Warrant Shares through the exercise of such Warrants. If the Warrant Agent shall receive any notice, demand or other document addressed to the Company by a Holder with respect to the Warrants, the Warrant Agent shall as promptly as practicable forward such notice, demand or other document to the Company.

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SECTION 3.5 Reliance on Counsel. The Warrant Agent may consult at any time with legal counsel satisfactory to it (who may be counsel to the Company), and the Warrant Agent shall incur no liability or responsibility for any action taken, suffered or omitted by it under this Agreement in reasonable reliance on and in accordance with the advice of such counsel.

SECTION 3.6 Reliance on Documents. The Warrant Agent will not incur any liability or responsibility for any action taken in reasonable reliance on any notice, written statement, resolution, waiver, consent, order, certificate or other paper, document or instrument reasonably believed by it to be genuine and to have been signed, sent, presented or made by the proper party or parties. The statements contained herein and in the Warrants shall be taken as statements of the Company, and the Warrant Agent assumes no responsibility for the correctness of any of the same, except as set forth by the Warrant Agent or as evidenced by action taken by the Warrant Agent.

SECTION 3.7 Validity of Agreement. The Warrant Agent shall not be responsible for the validity, execution or delivery of this Agreement (except the due execution of this Agreement by the Warrant Agent) or for the validity, execution or delivery of any Warrant (except the due countersignature of such Warrant Certificate by the Warrant Agent), and the Warrant Agent shall not by any act under this Agreement be deemed to make any representation or warranty as to the authorization or reservation of any Warrant Shares (or other stock) to be issued pursuant to this Agreement or any Warrant, or as to whether any Warrant Shares (or other stock) will, pursuant to this Agreement or any Warrant, when issued, be validly issued, fully paid and nonassessable.

SECTION 3.8 Instructions from Company. The Warrant Agent is hereby authorized and directed to accept instructions with respect to the performance of its duties under this Agreement from the Chairman of the Board of Directors, Chief Executive Officer, Chief Financial Officer, one of its Executive Vice Presidents or Vice Presidents, the Treasurer or the Controller of the Company, and to make an application to such officers for advice or instructions in connection with its duties, and the Warrant Agent shall not be liable for any action taken or suffered to be taken by it in reasonable reliance and in accordance with instructions of any such officer. The Warrant Agent shall not be liable for any action taken by, or omission of any action by, the Warrant Agent in accordance with a proposal included in any such application to such officers on or after the date specified in such application (which date shall not be less than five (5) business days after the date any such officer of the Company actually receives such application, unless any such officer shall have consented in writing to an earlier date) unless, prior to taking any such action (or the effective date in the case of an omission), the Warrant Agent shall have received written instructions in response to such application specifying the action to be taken or omitted.

SECTION 3.9 Proof of Actions Taken. Whenever in the performance of its duties under this Agreement the Warrant Agent shall deem it necessary or desirable that any fact or matter be proved or established by the Company prior to taking or

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suffering or omitting any action under this Agreement, such fact or matter (unless other evidence in respect thereof be herein specifically prescribed) may be deemed conclusively to be proved and established by a certificate signed by the Chairman of the Board of Directors, Chief Executive Officer, Chief Financial Officer, one of its Executive Vice Presidents or Vice Presidents, the Treasurer or the Controller of the Company and delivered to the Warrant Agent, and such certificate shall be full authorization to the Warrant Agent for any action taken or suffered in good faith by it under the provisions of this Agreement in reliance upon any such certificate.

SECTION 3.10 Compensation. The Company agrees to pay the Warrant Agent reasonable compensation for all services rendered by the Warrant Agent in the performance of its duties under this Agreement, to reimburse the Warrant Agent for all reasonable expenses, taxes and governmental charges and other charges incurred by the Warrant Agent in the performance of its duties under this Agreement.

SECTION 3.11 Indemnity. The Company shall indemnify the Warrant Agent and save it harmless from and against any and all liabilities, including judgments, costs and counsel fees, for anything done or omitted by the Warrant Agent in the performance of its duties under this Agreement, except as a result of the Warrant Agent’s willful misconduct, gross negligence or bad faith. The Warrant Agent shall indemnify the Company and save it harmless from and against any and all liabilities, including judgments, costs and counsel fees, for anything arising out of or attributable to the Warrant Agent’s refusal or failure to comply with the terms of this Agreement or which arise out of the Warrant Agent’s willful misconduct, gross negligence or bad faith; provided , however , that the Warrant Agent’s aggregate liability under this Agreement with respect to, arising from or arising in connection with this Agreement, whether in contract, in tort or otherwise, is limited to and shall not exceed the amounts paid under this Agreement by the Company to the Warrant Agent as fees and charges, but not including reimbursable expenses. The Warrant Agent shall notify the Company promptly of any claim for which it may seek indemnity, and the Company shall notify the Warrant Agent promptly of any claim for which it may seek indemnity.

SECTION 3.12 Legal Proceedings. The Warrant Agent shall be under no obligation to institute any action, suit or legal proceeding or to take any other action likely to involve expense unless the Company or any one or more Holders shall furnish the Warrant Agent with reasonable security and indemnity for any costs and expenses that may be incurred, but this provision shall not affect the power of the Warrant Agent to take such action as the Warrant Agent may consider proper, whether with or without any such security or indemnity. All rights of action under this Agreement or under any of the Warrants may be enforced by the Warrant Agent without the possession of any of the Warrants or the production thereof at any trial or other proceeding relative thereto, and any such action, suit or proceeding instituted by the Warrant Agent shall be brought in its name as warrant agent, and any recovery of judgment shall be for the ratable benefit of the Holders, as their respective rights or interests may appear.

SECTION 3.13 Other Transactions in Securities of Company. The Warrant Agent and any stockholder, director, officer or employee of the Warrant Agent may buy, sell or deal in any of the Warrants or other securities of the Company, or become pecuniarily interested in any transaction in which the Company may be interested, or contract

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with or lend money to the Company or otherwise act as fully and freely as though it were not the Warrant Agent under this Agreement. Nothing in this Agreement shall preclude the Warrant Agent from acting in any other capacity for the Company or for any other legal entity.

SECTION 3.14 Identity of Transfer Agent. Upon the appointment of any subsequent transfer agent for the Common Stock, or any other shares of the Company’s capital stock issuable upon the exercise of the Warrants, the Company shall file with the Warrant Agent a statement setting forth the name and address of such subsequent transfer agent.

SECTION 3.15 Company to Provide and Maintain Warrant Agent. The Company agrees for the benefit of the Holders that there shall at all times be a Warrant Agent under this Agreement until all the Warrants have been exercised or cancelled or are no longer exercisable.

SECTION 3.16 Resignation and Removal. The Warrant Agent may at any time resign by giving written notice to the Company of such intention on its part, specifying the date on which its desired resignation shall become effective. The Warrant Agent under this Agreement may be removed at any time by the filing with it of an instrument in writing signed by or on behalf of the Company and specifying such removal and the date when it shall become effective. Any removal under this Section 3.16 shall take effect upon the appointment by the Company as hereinafter provided of a successor Warrant Agent (which shall be (a) a bank or trust company, (b) organized under the laws of the United States or one of the states thereof, (c) authorized under the laws of the jurisdiction of its organization to exercise corporate trust powers, (d) having a combined capital and surplus of at least $50,000,000 (as set forth in its most recent reports of condition published pursuant to law or to the requirements of any United States federal or state regulatory or supervisory authority) and (e) having an office in the Borough of Manhattan, The City of New York) and the acceptance of such appointment by such successor Warrant Agent.

SECTION 3.17 Company to Appoint Successor. If at any time the Warrant Agent shall resign, shall be removed, shall become incapable of acting, shall be adjudged bankrupt or insolvent or shall commence a voluntary case under the federal bankruptcy laws, as now or hereafter constituted, or under any other applicable federal or state bankruptcy, insolvency or similar law or shall consent to the appointment of or the taking possession by a receiver, custodian, liquidator, assignee, trustee, sequestrator (or other similar official) of the Warrant Agent or its property or affairs, or shall make an assignment for the benefit of creditors, or shall admit in writing its inability to pay its debts generally as they become due, or shall take corporate action in furtherance of any such action, or a decree or order for relief by a court having jurisdiction in the premises shall have been entered in respect of the Warrant Agent in an involuntary case under the federal bankruptcy laws, as now or hereafter constituted, or any other applicable federal or state bankruptcy, insolvency or similar law, or a decree or order by a court having jurisdiction in the premises shall have been entered for the appointment of a receiver, custodian, liquidator, assignee, trustee, sequestrator (or similar official) of the Warrant Agent or of its property or affairs, or any public officer shall take charge or control of the Warrant Agent or of its property or affairs for the purpose of rehabilitation, conservation, winding up or liquidation, a successor Warrant Agent, qualified as aforesaid, shall be appointed by the

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Company by an instrument in writing, filed with the successor Warrant Agent. In the event that a successor Warrant Agent is not appointed by the Company, a successor Warrant Agent, qualified as aforesaid, may be appointed by the Warrant Agent or the Warrant Agent may petition a court to appoint a successor Warrant Agent. Upon the appointment as aforesaid of a successor Warrant Agent and acceptance by the successor Warrant Agent of such appointment, the Warrant Agent shall cease to be Warrant Agent under this Agreement; provided , however , that in the event of the resignation of the Warrant Agent under this Section 3.17, such resignation shall be effective on the earlier of (i) the date specified in the Warrant Agent’s notice of resignation and (ii) the appointment and acceptance of a successor Warrant Agent under this Agreement.

SECTION 3.18 Successor to Expressly Assume Duties. Any successor Warrant Agent appointed under this Agreement shall execute, acknowledge and deliver to its predecessor and to the Company an instrument accepting such appointment under this Agreement, and thereupon such successor Warrant Agent, without any further act, deed or conveyance, shall become vested with all the rights and obligations of such predecessor with like effect as if originally named as the Warrant Agent under this Agreement, and such predecessor, upon payment of its charges and disbursements then unpaid, shall thereupon become obligated to transfer, deliver and pay over, and such successor Warrant Agent shall be entitled to receive, all monies, securities and other property on deposit with or held by such predecessor, as the Warrant Agent under this Agreement.

SECTION 3.19 Successor by Merger. Any entity into which the Warrant Agent may be merged or consolidated, or any entity resulting from any merger or consolidation to which the Warrant Agent shall be a party, or any entity to which the Warrant Agent shall sell or otherwise transfer all or substantially all of its assets and business, shall be the successor Warrant Agent under this Agreement without the execution or filing of any paper or any further act on the part of any of the parties hereto; provided , however , that it shall be qualified as aforesaid.

ARTICLE IV

MISCELLANEOUS

SECTION 4.1 Notices. Any notice pursuant to this Agreement by the Company or by any Holder to the Warrant Agent, or by the Warrant Agent or by any Holder to the Company, shall be in writing and shall be delivered by facsimile transmission, or mailed first class, postage prepaid, (a) to the Company, at its offices at 500 Dallas Street, Suite 1000, Houston, Texas 77002, Attention: General Counsel, or (b) to the Warrant Agent, at its offices at 250 Royall Street, Canton, Massachusetts 02021, Attn. Corporate Actions Department. Each party to this Agreement may from time to time change the address to which notices to it are to be delivered or mailed by notice to the other party. Any notice mailed pursuant to this Agreement by the Company or the Warrant Agent to the Holders shall be in writing and shall be mailed first class, postage prepaid, or otherwise delivered, to such Holders at their respective addresses on the registry of the Warrant Agent.

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SECTION 4.2 Supplements and Amendments. The Company and the Warrant Agent may from time to time supplement or amend this Agreement without the approval of any Holder in order to cure any ambiguity or to correct or supplement any provision contained in this Agreement that may be defective or inconsistent with any other provision in this Agreement, or to make any other provisions in regard to matters or questions arising under this Agreement that the Company and the Warrant Agent may deem necessary or desirable; provided , however , that no such supplement or amendment to this Agreement shall be made that adversely affects the interests or rights of any of the Holders in any respect. Notwithstanding the foregoing, a supplement or amendment to this Agreement may be made by one or more substantially concurrent written instruments duly signed by the Holders of a majority of the then outstanding Warrants and delivered to the Company; provided , however , that the consent of each Holder affected thereby shall be required for any amendment pursuant to which: (a) the Exercise Price would be increased or the Exercise Number would be decreased (in each case, other than pursuant to adjustments in accordance with Article II), (b) the time period during which the Warrants are exercisable would be shortened or (c) the antidilution provisions set forth in Article II would be changed in such a way as to adversely affect such Holder. In determining whether the Holders of the required number of outstanding Warrants have approved any supplement or amendment to this Agreement, Warrants owned by the Company or its controlled Affiliates, if any, shall be disregarded and deemed not to be outstanding.

SECTION 4.3 Successors. All the covenants and provisions of this Agreement by or for the benefit of the Company or the Warrant Agent shall bind and inure to the benefit of the respective successors and assigns of the Company or the Warrant Agent under this Agreement.

SECTION 4.4 Rights Offering. Prior to the Expiration Date, the Company shall not effect any rights offering for the sale of Common Stock to substantially all of the holders of Common Stock if the per share price payable in such rights offering is less than the Market Price on the trading day immediately prior to the pricing of such rights offering.

SECTION 4.5 Governing Law; Jurisdiction . THIS AGREEMENT AND EACH WARRANT ISSUED UNDER THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE, WITHOUT GIVING EFFECT TO PRINCIPLES OF CONFLICT OF LAWS. IN CONNECTION WITH ANY ACTION, SUIT OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE WARRANTS, THE PARTIES HERETO AND EACH HOLDER IRREVOCABLY SUBMIT TO THE EXCLUSIVE JURISDICTION OF ANY FEDERAL OR STATE COURT LOCATED WITHIN THE COUNTY OF WILMINGTON, STATE OF DELAWARE. NOTICE MAY BE SERVED UPON THE COMPANY AT THE ADDRESS SET FORTH IN SECTION 4.1 AND UPON ANY HOLDER AT THE ADDRESS FOR SUCH HOLDER SET FORTH IN THE REGISTRY MAINTAINED BY THE COMPANY OR WARRANT AGENT PURSUANT TO SECTION 1.7. TO THE EXTENT PERMITTED BY APPLICABLE LAW, EACH OF THE PARTIES HERETO AND EACH HOLDER HEREBY UNCONDITIONALLY WAIVES TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING TO THIS AGREEMENT OR THE WARRANTS.

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SECTION 4.6 Benefits of this Agreement. This Agreement shall be for the sole and exclusive benefit of the Company, the Warrant Agent and the Holders. Nothing in this Agreement shall be construed to give to any Person other than the Company, the Warrant Agent and the Holders any legal or equitable right, remedy or claim under this Agreement.

SECTION 4.7 Counterparts. This Agreement may be executed in any number of counterparts, and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument.

SECTION 4.8 Table of Contents; Headings. The table of contents and headings of the Articles and Sections of this Agreement have been inserted for convenience of reference only, are not intended to be considered a part of this Agreement and shall not modify or restrict any of the terms or provisions of this Agreement.

SECTION 4.9 Severability. The provisions of this Agreement are severable, and if any clause or provision shall be held invalid, illegal or unenforceable in whole or in part in any jurisdiction, then such invalidity or unenforceability shall affect in that jurisdiction only such clause or provision, or part thereof, and shall not in any manner affect such clause or provision in any other jurisdiction or any other clause or provision of this Agreement in any jurisdiction.

SECTION 4.10 Availability of Agreement. The Warrant Agent shall keep copies of this Agreement and any notices given or received under this Agreement shall be made available for inspection by the Holders during normal business hours at its principal office in Massachusetts. The Company shall supply the Warrant Agent from time to time with such numbers of copies of this Agreement as the Warrant Agent may request.

SECTION 4.11 Saturdays, Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right required or granted herein shall not be a business day, then such action may be taken or such right may be exercised on the next succeeding day that is a business day.

SECTION 4.12 Damages. Neither party to this Agreement shall be liable to the other party for any consequential, indirect, special or incidental damages under any provisions of this Agreement or for any consequential, indirect, penal, special or incidental damages arising out of any act or failure to act hereunder even if that party has been advised of or has foreseen the possibility of such damages.

SECTION 4.13 Confidentiality. The Warrant Agent and the Company agree that all books, records, information and data pertaining to the business of the other party, including personal, non-public warrant holder information, which are exchanged or received pursuant to the negotiation or the carrying out of the obligations under this Agreement including the fees for services set forth in the attached schedule shall remain confidential, and shall not be voluntarily disclosed to any other person, except as may be required by law or, as determined by the Company, the rules and regulations of any stock exchange, electronic trading network or trading platform applicable to the Company and/or the Warrants.

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SECTION 4.14 Definitions. As used in this Agreement, the following terms having the meanings ascribed thereto below:

“ Affiliate ” means, with respect to any Person, any Person directly or indirectly controlling, controlled by or under common control with, such other Person. For purposes of this definition, “ control ” (including, with correlative meanings, the terms “controlled by” and “under common control with”) when used with respect to any Person, means the possession, directly or indirectly, of the power to cause the direction of management and/or policies of such Person, whether through the ownership of voting securities by contract or otherwise.

“ Agreement ” has the meaning set forth in the preamble.

“ Board of Directors ” means the board of directors of the Company, including any duly authorized committee thereof.

“ Book-Entry Warrant ” means Warrants issued in book-entry registration in the books and records of the Warrant Agent.

“ Business Combination ” means a merger, consolidation, statutory share exchange or similar transaction that requires the approval of the Company’s stockholders.

“ business day ” means any day except Saturday, Sunday and (i) at any time when the Warrants are listed on the NASDAQ Stock Market or the New York Stock Exchange, any day on which the NASDAQ Stock Market or the New York Stock Exchange, as applicable, is authorized or required by law or other governmental actions to close or (ii) at any time when the Warrants are not listed on the NASDAQ Stock Market or the New York Stock Exchange, any day on which banking institutions in the State of New York are authorized or required by law or other governmental actions to close.

“ Common Stock ” has the meaning set forth in the recitals.

“ Company ” has the meaning set forth in the preamble.

“ El Paso ” has the meaning set forth in the recitals.

“ Exchange Act ” has the meaning set forth in Section 1.18.

“ Exercise Number ” has the meaning set forth in Section 1.3.

“ Exercise Price ” has the meaning set forth in Section 1.3.

“ Expiration Date ” has the meaning set forth in Section 1.4.

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“ Fair Market Value ” means, with respect to any security or other property, the fair market value of such security or other property as determined by the Board of Directors, acting in good faith.

“ Holder ” and “ Holders ” has the meaning set forth in the recitals.

“ Issue Date ” means the date of this Agreement.

“ Market Price ” means, with respect to a particular security, on any given day, the last reported sale price regular way or, in case no such reported sale takes place on such day, the average of the last closing bid and ask prices regular way, in either case on the principal national securities exchange on which the applicable securities are listed or admitted to trading (the “ Principal Exchange ”), or if not listed or admitted to trading on any national securities exchange, the average of the closing bid and ask prices as furnished by two (2) members of the Financial Industry Regulatory Authority, Inc. selected from time to time by the Company for that purpose. “Market Price” shall be determined without reference to after hours or extended hours trading. If such security is not listed and traded in a manner that the quotations referred to above are available for the period required under this Agreement, the Market Price per share of Common Stock shall be deemed to be the fair market value per share of such security as determined in good faith by the Board of Directors in reliance on an opinion of a nationally recognized independent investment banking corporation retained by the Company for such purpose; provided , however , that if any such security is listed or traded solely on a non-U.S. market, such fair market value shall be determined by reference to the closing price of such security as of the end of the most recently ended business day in such market prior to the date of determination; provided , further , that if making such determination requires the conversion of any currency other than U.S. dollars into U.S. dollars, such conversion shall be done in accordance with customary procedures based on the rate for conversion of such currency into U.S. dollars displayed on the relevant page by Bloomberg L.P. (or any successor or replacement service) on or by 4:00 p.m., New York City time, on such exercise date. For the purposes of determining the Market Price of the Common Stock on the “trading day” preceding, on or following the occurrence of an event, (i) that trading day shall be deemed to commence immediately after the regular scheduled closing time of trading on the Principal Exchange or, if trading is closed at an earlier time, such earlier time and (ii) that trading day shall end at the next regular scheduled closing time, or if trading is closed at an earlier time, such earlier time (for the avoidance of doubt, and as an example, if the Market Price is to be determined as of the last trading day preceding a specified event and the closing time of trading on a particular day is 4:00 p.m. and the specified event occurs at 5:00 p.m. on that day, the Market Price would be determined by reference to such 4:00 p.m. closing price).

“ Merger Agreement ” has the meaning set forth in the recitals.

“ Notice of Exercise ” has the meaning set forth in Section 1.1.

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“ Ordinary Cash Dividends ” means a regular quarterly cash dividend on shares of Common Stock legally available therefor; provided , however , that Ordinary Cash Dividends shall not include any cash dividends paid subsequent to the Issue Date to the extent the aggregate per share dividends paid on the outstanding Common Stock in any quarter exceed (i) $0.50 per share of Common Stock in any quarter during the fiscal year ended December 31, 2012, (ii) $0.60 per share of Common Stock in any quarter during the fiscal year ended December 31, 2013, (iii) $0.70 per share of Common Stock in any quarter during the fiscal year ended December 31, 2014, (iv) $0.80 per share of Common Stock in any quarter during the fiscal year ended December 31, 2015, (v) $0.90 per share of Common Stock in any quarter during the fiscal year ended December 31, 2016 and (vi) $1.00 per share of Common Stock in any quarter during the fiscal year ended December 31, 2017, in each case, as adjusted for any stock split, stock dividend, reverse stock split, reclassification or similar transaction.

“ Per Share Fair Market Value ” has the meaning set forth in Section 2.3.

“ Person ” has the meaning given to it in Section 3(a)(9) of the Exchange Act and as used in Sections 13(d)(3) and 14(d)(2) of the Exchange Act.

“ Pro Rata Repurchase ” means any purchase of shares of Common Stock by the Company or any Affiliate thereof pursuant to (i) any tender offer or exchange offer made to substantially all holders of Common Stock subject to Section 13(e) or 14(e) of the Exchange Act or Regulation 14E promulgated thereunder or (ii) any other offer available to substantially all holders of Common Stock, in the case of both (i) and (ii), whether for cash, shares of Common Stock of the Company, other securities of the Company, evidences of indebtedness of the Company or any other Person or any other property (including, without limitation, shares of Common Stock, other securities or evidences of indebtedness of a subsidiary), or any combination thereof, effected while any Warrants are outstanding. The “ Effective Date ” of a Pro Rata Repurchase shall mean the date of acceptance of shares for purchase or exchange by the Company under any tender or exchange offer which is a Pro Rata Repurchase or the date of purchase with respect to any Pro Rata Repurchase that is not a tender or exchange offer.

“ Registered Holder ” means any registered holder of Book-Entry Warrants or Warrant Certificates in the Warrant Registry.

“ Subsidiary ” means any corporation, limited liability company, partnership, association, trust or other entity the accounts of which would be consolidated with those of such party in such party’s consolidated financial statements if such financial statements were prepared in accordance with U.S. GAAP, as well as any other corporation, limited liability company, partnership, association, trust or other entity of which securities or other ownership interests representing more than 50% of the equity or more than 50% of the ordinary voting power (or, in the case of a partnership, more than 50% of the general partnership interests or, in the case of a limited liability company, the managing member) are, as of such date, owned by such party or one or more Subsidiaries of such party or by such party and one or more Subsidiaries of such party. The term “Subsidiary” shall include Kinder Morgan Energy Partners, L.P.

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“ trading day ” means (i) if the shares of Common Stock are not traded on any national or regional securities exchange or association or over-the-counter market, a business day or (ii) if the shares of Common Stock are traded on any national or regional securities exchange or association or over-the-counter market, a business day on which such relevant exchange or quotation system is scheduled to be open for business and on which the shares of Common Stock (x) are not suspended from trading on any national or regional securities exchange or association or over-the-counter market for any period or periods aggregating one half hour or longer; and (y) have traded at least once on the national or regional securities exchange or association or over-the-counter market that is the primary market for the trading of the shares of Common Stock. The term “trading day” with respect to any security other than the Common Stock shall have a correlative meaning based on the primary exchange or quotation system on which such security is listed or traded.

“ U.S. GAAP ” means United States generally accepted accounting principles.

“ Warrant ” and “ Warrants ” has the meaning set forth in the recitals.

“ Warrant Agent ” has the meaning set forth in the preamble.

“ Warrant Certificate ” and “ Warrant Certificates ” has the meaning set forth in Section 1.1.

“ Warrant Registry ” has the meaning set forth in Section 1.7.

“ Warrant Statement ” and “ Warrant Statements ” has the meaning set forth in Section 1.1.

“ Warrant Share ” and “ Warrant Shares ” has the meaning set forth in Section 1.3.

[Signature page follows]

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed, all as of the day and year first above written.

[Signature Page to the Warrant Agreement]

EXHIBIT A

FORM OF WARRANT CERTIFICATE

(See Attached)

Shares****0000 00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****00000 common stock 0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000 **Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000*ZERO HUNDRED AND ZERO*** *Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000** purchase warrants Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****000000**S This certifies that, for value received, [__] or registered assigns (the “Holder”), is entitled to purchase from by and among the Companys Computershare Inc. and Computershare Trust Company, N.A. (the “Warrant Kinder Morgan, Inc., a Delaware corporation (the “Company”), at any time from 9:00 a.m., New York City time, on Agreement”), and is subject to the terms and provisions contained in the Warrant Agreement, to all of which the [__], 2012 until 5:00 p.m., New York City time, on [__], 2017 (the “Expiration Date”), at the purchase price of $40.00 Holder by acceptance hereof consents. A copy of the Warrant Agreement may be obtained by the Holder upon per share (the “Exercise Price”), the number of shares of Class P common stock, par value $0.01 per share, of written request to the Company or at the office of the Warrant Agent. the Company (the “Common Stock”), shown above. The number of shares purchasable upon exercise of the Upon any partial exercise of the Warrants evidenced by this Warrant Certificate, there shall be countersigned Common Stock Purchase Warrants (the “Warrants”) and the Exercise Price are subject to adjustment from time to and issued to the Holder a new Warrant Certificate in respect of the shares of Common Stock as to which the time as set forth in the Warrant Agreement (as defined below). Warrants evidenced by this Warrant Certificate shall not have been exercised. This Warrant Certificate may be The Warrants may be exercised in whole or in part by presentation of this Warrant Certificate with the Notice exchanged at the office of the Warrant Agent by surrender of this Warrant Certificate properly endorsed either of Exercise on the reverse side hereof duly executed and simultaneous payment of the Exercise Price at the separately or in combination with one or more other Warrant Certificates for one or more new Warrant Certificates principal office of Computershare Inc. and Computershare Trust Company, N.A., at 250 Royall Street, Canton, MA evidencing the right of the Holder to purchase the same aggregate number of shares of Common Stock as were 02021 (the “Warrant Agent”). Payment of such price shall be made, at the option of the Holder, either (i) by certified purchasable on exercise of the Warrants evidenced by the Warrant Certificate or Certificates exchanged. No or official bank check payable to the Warrant Agent or (ii) by delivering a written direction to the Warrant Agent that fractional shares will be issued upon the exercise of any Warrant, but the Company will pay the cash value thereof the Holder desires to exercise Warrants pursuant to a “cashless exercise,” in which case the Holder will receive a determined as provided in the Warrant Agreement. number of shares of Common Stock that is equal to the aggregate number of shares of Common Stock for which The Holder may be treated by the Company, the Warrant Agent and all other persons dealing with this Warrant the Warrants are being exercised less the number of shares of Common Stock that have an aggregate Market Certificate as the absolute owner hereof. Price (as defined in the Warrant Agreement) on the trading day on which such Warrants are exercised that is equal The Warrants may be sold, assigned, transferred, pledged, encumbered or in any other manner transferred or to the aggregate Exercise Price. The Exercise Price and the number of shares of Common Stock that may be disposed of, in whole or in part, but only in accordance with the terms of the Warrant Agreement and in compliance purchased upon the exercise of the Warrants evidenced by this Warrant Certificate are subject to modification and with all applicable laws. adjustment in accordance with the terms of the Warrant Agreement. This Warrant Certificate shall not be valid or obligatory for any purpose until it shall have been countersigned This Warrant Certificate is issued under and in accordance with a Warrant Agreement, dated as of [__], 2012, by the Warrant Agent. DATED <<Month Day, Year>> Chairman and Chief Executive Officer COUNTERSIGNED AND REGISTERED: COMPUTERSHARE TRUST COMPANY, N.A. WARRANT AGENT AND REGISTRAR, By AUTHORIZED SIGNATURE Secretary CUSIP XXXXXX XX X Holder ID XXXXXXXXXX INC. Insurance Value 00.1,000,000 Number of Warrants 123456 DTC 12345678901234512345678 PO BOX 43004, Providence, RI 02940-3004 Certificate Numbers Num/No Denom. Total. MR A SAMPLE 1234567890/1234567890 111 DESIGNATION (IF ANY) 1234567890/1234567890 222 ADD 1 1234567890/1234567890 333 ADD 2 1234567890/1234567890 444 ADD 3 ADD 4 1234567890/1234567890 555 1234567890/1234567890 666 Total Transaction 7

. KINDER MORGAN, INC. NOTICE OF EXERCISE (To be executed upon exercise of Warrant) To: KINDER MORGAN, INC. The undersigned hereby irrevocably elects to exercise the right of purchase represented by the Warrant Certificate within for, and to purchase thereunder, ______ shares of the Class P common stock, par value $0.01 per share, of Kinder Morgan, Inc. (the “Common Stock”), as provided for therein, and tenders herewith payment of the purchase price. The purchase price shall be paid: _____ by certified check or official bank check; or _____ by electing to receive a number of shares of Common Stock that is equal to the aggregate number of shares of Common Stock for which the Warrants are being exercised less the number of shares of Common Stock that have an aggregate Market Price (as defined in the Warrant Agreement) on the trading day on which such Warrants are exercised that is equal to the aggregate Exercise Price (as defined in the Warrant Agreement). Please issue a certificate or certificates for such shares of Common Stock in the name of, and pay any cash for any fractional share to: If in definitive/certificated form: SOCIAL SECURITY NUMBER OR OTHER IDENTIFYING NUMBER OF ASSIGNEE, IF ANY: Name: Address: Signature: Note: The above signature should correspond exactly with the name on the face of this Warrant Certificate and must be guaranteed by a member of a recognized guarantee medallion program. And, if said number of shares shall not be all the shares purchasable under the within Warrant Certificate, a new Warrant Certificate is to be issued in the name of said undersigned for the balance remaining of the shares purchasable thereunder less any fraction of a share paid in cash. The IRS requires that we report the cost basis of certain shares acquired after January 1, 2011. If your shares were covered by the legislation and you have sold or transferred the shares and requested a specific cost basis calculation method, we have processed as requested. If you did not specify a cost basis calculation method, we have defaulted to the first in, first out (FIFO) method. Please visit our website or consult your tax advisor if you need additional information about cost basis. If you do not keep in contact with us or do not have any activity in your account for the time periods specified by state law, your property could become subject to state unclaimed property laws and transferred to the appropriate state.

EXHIBIT B

FORM OF WARRANT STATEMENT

(See Attached)

+ The Sample Company Computershare PO Box 43078 Providence, RI 02940-3078 Within USA, US territories & Canada XXX XXX XXXX Outside USA, US territories & Canada XXX XXX XXXX MR A SAMPLE www.computershare.com DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 Holder Account Number ADD 6 C1234567890 J N T Please see important PRIVACY NOTICE on reverse side of statement. NNNNNN Company ID TDA SSN/TIN Certified Yes/No Sample Company - Corporate Action Advice Retain For Your Records This Transaction Advice is your record of warrant entitlement received as a result of the automatic corporate action processing of XXXXXXXXXXX shares. Warrant Transaction Advice Description Shares Presented Exchange Rate Warrants Credited CUSIP Number Form of Warrant Credit Fractional Warrant WARRANTS 115.000000 0.087000 10.000000 123456789 DRS 0.550000 1 U D C C O Y + 001CD70003 00HXDA-PP WARNING: MULTIPLE SAFETY FEATURES. THE FACE OF THIS CHECK HAS A BLUE BACKGROUND AND FLUORESCENT INK (HOLD UNDER BLACKLIGHT TO VIEW). REFER TO SECURITY ENDORSEMENT BACKER FOR TRUE WATERMARK AND ADDITIONAL FEATURES. Bank of America 64-1278 The Sample Company Atlanta, Dekalb Country, Georgia 611 GA Check Number: 0000000 Pay ***ONE HUNDRED TWENTY-THREE DOLLARS AND FORTY-FIVE CENTS*** Pay to the Mr A Sample Date order of Designation (if any) Address Address 2 1 $ ***123.45*** Address 3 Address 4 Computershare Inc. Authorized Paying Agent. Security Features Details on Back. Authorized Signature(s)

. + The Sample Company Computershare Trust Company, N.A. PO Box 43078 Providence Rhode Island 02940-3078 Within USA, US territories & Canada XXX XXX XXXX Outside USA, US territories & Canada XXX XXX XXXX MR A SAMPLE www.computershare.com DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 Holder Account Number ADD 6 C1234567890 J N T NNNNNN Company ID XXXX SSN/TIN Certified Yes/No Direct Registration Transaction Request Form Please mark one box only. This form is only applicable to warrants held in Direct Registration (DRS). Sell This Warrants Sell All * OR Number Of Whole Warrants * You will receive a check for the proceeds of the sale, less a transaction fee of $15.00 plus 12 cents per whole warrant sold. Sales requests submitted on this Direct Registration Transaction Request Form will be processed as a batch order. Please see instructions on the reverse side for more information. Signatures: The instructions given above must be signed by the registered holder. If held in joint name, both owners must sign. By signing, I/we agree to the terms and conditions of Direct Registration. If you have any questions, call the number above. Signature 1 - Please keep signature within the box. Signature 2 - Please keep signature within the box. Date (mm/dd/yyyy) Daytime Telephone Number * For sales requests for partnerships or corporations, please have your signature(s) medallion guaranteed or provide us with a certified copy of the corporate resolution dated within 180 days or a certified copy of the partnership agreement dated within 60 days. Medallion Guarantee Stamp (Notary Public Is Not Acceptable) IN THE EVENT YOU WISH TO MAKE A TRANSACTION TO YOUR ACCOUNT, PLEASE MARK ONE BOX ONLY. IF YOU DO NOT WISH TO MAKE A TRANSACTION AT THIS TIME, PLEASE RETAIN THIS FORM FOR FUTURE USE. YOU ARE NOT REQUIRED TO TAKE ANY FURTHER ACTION. C O Y + 011D8B (Rev. 1-11)

How To Fill Out the Direct Registration Transaction Request Form Sell - To sell ALL warrants, check the “Sell All Warrants” box on the reverse side. To sell only a portion of the warrants you hold, DO NOT check the “Sell All Warrants” box; instead, indicate the number of warrants you wish to sell in the “Sell This Number Of Whole Warrants” box, and return to the address below. Sale requests submitted on this Direct Registration Transaction Request Form will be treated as a batch order and are generally processed no later than five business days after the date on which the form is received. A market order sale may be available by telephone or through Investor Centre at www.computershare.com. Please contact us at the phone number listed on the reverse side or refer to the Terms and Conditions of Sales Facility in the Direct Registration brochure for more information concerning the types of orders available and fee details. Note: market orders and batch orders are subject to different fees. The IRS requires that we report the cost basis of certain warrants acquired after January 2, 2011. If your warrants are covered by the legislation and you provide a written request specifying a cost basis calculation method to be used when selling those warrants, we will process as requested. If you do not specify a cost basis calculation method, we will default to selling warrants in first in, first out (FIFO) order as shown on our system. Please visit our website or consult your tax advisor if you need additional information about cost basis. When selling through Computershare, you are unable to direct the time at which the warrants may be sold and you are unable to select the broker through whom sales are made. Cost Basis - The IRS requires that we report the cost basis of certain warrants acquired after January 1, 2011. If your warrants are covered by the legislation and you sell or transfer the warrants and request a specific cost basis calculation method, we will process as requested. If you do not specify a cost basis calculation method, we will default to the first in, first out (FIFO) method. Please visit our website or consult your tax advisor if you need additional information about cost basis. SSN/TIN Certified - If your account is not certified, you must complete a W-9 or W-8BEN tax form or taxes will be withheld from any dividends or sales proceeds per Internal Revenue Service requirements. OTHER TRANSACTIONS - To obtain forms for transferring your Direct Registration warrants to another person or to make changes to your account, such as an address change, please call the telephone number or visit our website on the reverse of the form. MAIL TO: Regular Mail: Computershare Courier or Certified Mail: Computershare P.O. Box 43078 250 Royall Street Providence, RI 02940-3078 Canton, MA 02021 011NCA-WAR

EXHIBIT C

NOTICE OF EXERCISE

(To be executed upon exercise of Warrant)

To: KINDER MORGAN, INC.

The undersigned hereby irrevocably elects to exercise the right of purchase represented by the [Warrant Certificate/Warrant Statement] within for, and to purchase thereunder,             shares of the Class P common stock, par value $0.01 per share, of Kinder Morgan, Inc. (the “ Common Stock ”), as provided for therein, and tenders herewith payment of the purchase price.

The purchase price shall be paid:

Please issue a certificate or certificates for such shares of Common Stock in the name of, and pay any cash for any fractional share to:

[And, if said number of shares shall not be all the shares purchasable under the within Warrant Certificate, a new Warrant Certificate is to be issued in the name of said undersigned for the balance remaining of the shares purchasable thereunder less any fraction of a share paid in cash.]

PERMITTED TRANSFER

(To be executed only upon transfer of [Warrant Certificate] to the extent such transfer is permissible under the terms of the Warrant Agreement)

For value received,             hereby sells, assigns and transfers unto the within [Warrant Certificate], together with all right, title and interest therein, and does hereby irrevocably constitute and appoint             attorney, to transfer said [Warrant Certificate] on the books of Kinder Morgan, Inc., with full power of substitution in the premises.

Exhibit 4.3

AMENDMENT NO. 1

TO THE

SHAREHOLDERS AGREEMENT

THIS AMENDMENT NO. 1. (the “ Amendment ”), is dated as of May 25, 2012, to the Shareholders Agreement, dated as of February 10, 2011, by and among Kinder Morgan, Inc., a Delaware Corporation (the “ Company ”) and the Shareholders identified on the signature pages thereto (the “ Shareholders Agreement ”). Capitalized terms used in this Amendment shall have the same meanings given to them in the Shareholders Agreement unless otherwise indicated.

WHEREAS, the Company has entered into that certain Agreement and Plan of Merger, dated as of October 16, 2011, by and among the Company, Sherpa Merger Sub, Inc., a Delaware corporation, Sherpa Acquisition, LLC, a Delaware limited liability company, El Paso Corporation, a Delaware corporation (f/k/a Sirius Holdings Merger Corporation) (“ El Paso Corporation ”), El Paso LLC, a Delaware limited liability company (f/k/a El Paso Corporation and successor in interest to Sirius Merger Corporation) (the “ Merger Agreement ”);

WHEREAS, pursuant to Section 5.15 of the Merger Agreement, the Company has agreed to take all actions necessary to elect two (2) individuals designated by El Paso Corporation to the Company’s Board of Directors (the “ Board ”);

WHEREAS, in connection with the transactions contemplated by the Merger Agreement, certain stockholders of the Company entered into a Voting Agreement, dated as of October 16, 2011, by and among El Paso Corporation and the Stockholders (as defined in the Voting Agreement) (the “ Voting Agreement ”);

WHEREAS, in order to give effect to the matters set forth in Section 5.15 of the Merger Agreement, pursuant to the Voting Agreement, the Stockholders agreed to amend the Shareholders Agreement of the Company to increase the size of the Board;

WHEREAS, the Stockholders agree to further amend the Shareholders Agreement to include references to certain subsidiaries of El Paso Corporation; and

WHEREAS, the parties executing this Amendment collectively constitute those parties required, in accordance with Section 7.10 of the Shareholders Agreement, to execute this Amendment in order for this Amendment to be effective.

NOW, THEREFORE, in consideration of mutual covenants and undertakings contained herein and for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and in accordance with Section 7.10 of the Shareholders Agreement, the parties hereto hereby agree as follows:

(b) in the event a KMP, EPB or KMR securities offering with anticipated offering proceeds of at least $150,000,000 is occurring, a period of seven (7) calendar days as specified in the written notice delivered by the Company to the applicable Shareholders pursuant to Section 5.1(e) or Section 5.3(d ) (or such shorter period if the Company notifies the applicable Shareholders prior to the expiration of the seven (7) calendar day period); provided , that a Blackout Period described in this clause (b) may not occur more than twice in any period of twelve (12) consecutive months; and

“ EPB ” means El Paso Pipeline Partners, L.P., a Delaware limited partnership.

“ EPGP ” means El Paso Pipeline GP Company, L.L.C., a Delaware limited liability company.

“ Partnership Observers ” has the meaning set forth in Section 3.6(b) .

“ Subsidiary ” or “ Subsidiaries ” means, with respect to any Person, as of any date of determination, any other Person as to which such Person owns, directly or indirectly, or otherwise controls, more than 50% of the voting shares or other similar interests or is general partner or managing member of, or serves in a similar capacity for, such Person (including, in the case of the Company, KMP, KMR and EPB and their respective Subsidiaries).

The first sentence of Section 3.1(a) of the Shareholders Agreement which states “The number of directors shall initially be thirteen (13) and may be increased in accordance with Section 3.3 or reduced in accordance with this Section 3.1(a) .” shall be deleted in its entirety and replaced with the following:

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“The number of directors shall, as of May 25, 2012, be fifteen (15) and may be increased in accordance with Section 3.3 or reduced in accordance with this Section 3.1(a) .”

Section 3.6 of the Shareholders Agreement shall be deleted in its entirety and replaced with the following:

Section 3.6 CERTAIN AGREEMENTS.

(a) Upon the reasonable request of the Investor Shareholders holding Voting Securities representing a majority of the Total Voting Power of all Voting Securities then held by the Investor Shareholders (with respect to which the Company shall not unreasonably object), the Company shall, with regard to any Subsidiaries of the Company, cause the directors nominated to the Board by the Investor Shareholders pursuant to Article III (considered as a group) to be appointed or elected to the boards or governing bodies of such Subsidiaries of the Company (other than KMGP, KMP, KMR, EPGP, EPB or any of their Subsidiaries) so that the Investor Shareholders (as a group) have, as closely as is practicable, the same proportionate representation on such boards or governing bodies (or, with respect to Subsidiaries of the Company that become publicly traded after the date hereof (other than any Subsidiaries of KMR, KMP or EPB) on the seats of such boards or governing bodies for which the Company has the right to designate directors; provided , that the Investor Shareholders shall have agreed to the limitation on the ability of the Company to designate directors of such Subsidiaries) as they do on the Board.

(b) The Company shall (i) permit the Board nominees chosen by the Investor Shareholders and each Observer of the Investor Shareholders permitted to attend meetings of the Board pursuant to Section 3.2 (together, the “ Partnership Observers ”) to attend each meeting of the KMGP board, the EPGP board and the KMR board and any committees thereof, (ii) send to each Partnership Observer notice of the time and place of such meeting, (iii) provide to each Partnership Observer copies of all notices, reports, minutes and consents at the time and in the manner as they are provided to the members of the KMGP, EPGP and KMR boards and the relevant committees thereof; provided , however , that the KMGP, EPGP and KMR boards, and committees thereof, shall have the right to exclude the Partnership Observers from access to any board or committee meeting (or portion thereof) or any materials distributed to any board or committee members in the sole discretion of a majority of the members of such board or committee in attendance at such board or committee meeting (or, with respect to materials to be provided in advance of any meeting, a majority of the members of such board or committee, as applicable). A Partnership Observer shall recuse himself or herself from any portion of any board or committee meeting if (i) such Partnership Observer has actual

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knowledge that the Investor Shareholder that selected such Partnership Observer, or one of its controlled Affiliates, is engaged in, pursuing or evaluating any business opportunity that such Partnership Observer has actual knowledge that the Company or any of its Subsidiaries is either currently engaged in, pursuing or evaluating and the participation of such Partnership Observer would create a conflict of interest and (ii) such business opportunity is being discussed during such portion of such meeting (provided, that for the avoidance of doubt, no Partnership Observer shall be deemed to be in breach of his or her obligations pursuant to this sentence so long as such Partnership Observer recuses himself or herself from such portion of such meeting as promptly as practicable following the time in which it becomes reasonably apparent that such business opportunity is being discussed). All Partnership Observers, in connection with exercising their rights under this Section 3.6(b) , shall be required (i) to execute and deliver to KMGP, EPGP or KMR, as applicable, a customary (for observers of public corporations) confidentiality agreement that is reasonably acceptable to such Partnership Observer and to KMGP, EPGP or KMR, as applicable, (ii) to undergo any training required by KMP’s, KMGP’s, KMR’s, EPB’s or EPGP’s policies regarding FERC standards of conduct that are applicable to KMGP , EPGP or KMR directors, as applicable, and (iii) to comply with any other regulatory requirements to the extent applicable to such Partnership Observer in his or her capacity as a Partnership Observer.

(c) So long as an Investor Shareholder constitutes an Eligible Investor Shareholder, the Company shall inform such Eligible Investor Shareholder promptly of any action or proposed action by the Company or any of its Affiliates (including KMP, EPB and KMR) that the Chief Executive Officer reasonably believes could impose any filing obligation, restriction or other regulatory burden ( e.g. , bank holding company registration, or public utility holding company registration) on such Eligible Investor Shareholder or its Affiliates. In addition, neither the Company nor any of its Subsidiaries or Affiliates (other than KMP, KMP’s operating partnerships, KMR, EPB or any of their respective Subsidiaries or controlled Affiliates, or KMGP (solely to the extent that KMGP (i) is acting in its capacity as a holder of shares of KMR or in its capacity as General Partner pursuant to Section 1.4 of the Delegation of Control Agreement to approve any action taken by KMR, or (ii) is acting in its capacity as the general partner of KMP or any of its operating partnerships to approve any matter on behalf of KMP or any of its operating partnerships (and not to the extent acting in another capacity, such as acting to amend or waive a right or obligation of KMGP (or of its direct or indirect parent entities) under any organizational document of KMP or its operating partnerships)) or EPGP (solely to the extent that EPGP is acting in its capacity as the general partner of EPB with respect to the business and affairs of EPB or to approve any matter on behalf of EPB (and not to the extent acting in another capacity, such as acting to amend or waive a right or obligation of EPGP (or of its direct or indirect parent entities) under any organizational document of EPB)) or KMGP Services Company, Inc. to the extent it is taking action related to carrying out the terms of the Employee Services Agreement dated as of January 1, 2001 (not including amendments or waivers), among KMGP Services Company, Inc., KMGP and KMP) will take any action (or authorize any of, commit, agree or propose to take any of, consent to or vote in favor of any action) that would

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impose any filing obligation, restriction or other regulatory burden ( e.g. , bank holding company registration, or public utility holding company registration) on any Eligible Investor Shareholder or its Affiliates that such Eligible Investor Shareholder reasonably determines could have a significant impact on the interests of such Eligible Investor Shareholder or its Affiliates (other than its interests as a Shareholder), without approval by such Eligible Investor Shareholder (it being understood that such limitation shall not be read to prohibit acquisitions that may prohibit future acquisitions by such Investor Shareholder or its Affiliates due to antitrust overlaps).

(d) So long as an Investor Shareholder constitutes an Eligible Investor Shareholder, the Company shall keep such Eligible Investor Shareholder informed, on a current basis, of any events or changes with respect to any criminal or regulatory investigation or action involving the Company or any of its Affiliates, so that such Eligible Investor Shareholder and its Affiliates will have the opportunity to take appropriate steps to avoid or mitigate any regulatory consequences to them that might arise from such investigation or action.

(e) So long as an Investor Shareholder constitutes an Eligible Investor Shareholder, the Company shall reasonably cooperate with such Eligible Investor Shareholder and its Affiliates in efforts to mitigate consequences of circumstances described in clause (c) or (d) ( i.e. , coordinating and assistance in meeting with regulators). Each Investor Shareholder who receives any non-public information pursuant to clause (c) or (d) agrees (i) to use it only in connection with purposes related to the subject matter of clauses (c), (d) or (e), as applicable, and (ii) to maintain the disclosed information in confidence, except as required by applicable law or applicable national securities exchange rule or to the extent that such information (A) enters the public domain through no fault of such Investor Shareholder or (B) is later lawfully acquired by such Investor Shareholder on a non-confidential basis from sources other than the Company and its Subsidiaries.

(f) Each Executive Management Shareholder agrees that he or she shall not, during the Non-Compete Period, directly or indirectly (other than on behalf of or at the request of the Company or its Subsidiaries):

(i) engage in, have an interest in, or otherwise be employed by (whether as an owner, operator, partner, member, manager, employee, officer, director, consultant, advisor, or representative), provide consulting or management services to, or permit his or her name to be used in connection with the activities of, any business or organization, engaged in a business that is competitive with a business in which the Company or any of its Subsidiaries engages (a “ Competitive Business ”); provided , that ownership of less than one percent (1%) of the outstanding stock of any publicly traded corporation shall not be deemed to be a violation of this Section 3.6(f) solely by reason thereof; provided , further , that, providing investment banking or legal services to a Competitive Business as an independent consultant, independent advisor or independent representative shall not be deemed to be a violation of this Section

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3.6(f) solely by reason thereof so long as providing such services is not the primary duties or business activities of such individual; provided , further , that, if the Board determines that the provisions of this Section 3.6(f)(i) should not apply to an Executive Management Shareholder (other than Kinder or Shaper) following the termination of such Executive Management Shareholder’s employment by the Company, the provisions of this Section 3.6(f)(i) shall be deemed waived with respect to such Executive Management Shareholder;

(ii) solicit any Person who is or, within the prior twelve (12) months, was, or whose Affiliate is or, within the prior twelve (12) months, was a customer of the Company or any of its Subsidiaries or persuade or attempt to persuade any such Person not to be a customer of the Company or any of its Subsidiaries or to reduce the amount of business that such customer does with the Company or any of its Subsidiaries, or enter into or seek to enter into any agreement (to the extent such agreement is of a nature that is related to the business in which the Company or any of its Subsidiaries engage) with, to the Executive Management Shareholder’s knowledge, any such Person; or

(iii) contact, approach or solicit for the purpose of offering employment to or hiring or retaining, or actually hire or retain any Person who is or was employed or retained by the Company or its Affiliates as an employee during the immediately preceding twelve (12) months or attempt to persuade any Person not to continue to be employed or retained by the Company or its Affiliates or to terminate his or her employment or services with the Company or its Affiliates; provided , that notwithstanding the foregoing, general solicitations of employment published in a journal, newspaper or other publication of general circulation and not specifically directed towards such employees, consultants or independent contractors shall not be deemed to constitute solicitation for purposes of this Section 3.6(f)(iii) .

(iv) Notwithstanding anything to the contrary in this Section 3.6(f) , with respect to the country of Mexico, this Section 3.6(f) will only apply (and therefore will be limited) to activities that are competitive with the businesses in which any of the Mexican Subsidiaries of the Company engages.

Each Executive Management Shareholder acknowledges and agrees that: (A) the time and geographical scope of the restrictions of this Section 3.6(f) are reasonable; (B) the burden on the Executive Management Shareholder of complying with the restrictions of this Section 3.6(f) is not unreasonable; (C) the general public policy is not harmed by the restrictions of this Section 3.6(f) ; and (D) the restrictions of this Section 3.6(f) are necessary for the protection of the Company and its Subsidiaries. Each Executive Management Shareholder further acknowledges and agrees (x) the Executive Management Shareholder’s breach of the provisions of this Section 3.6(f) will cause the Company irreparable harm, which cannot be adequately compensated by money damages, (y) if the Executive Management Shareholder breaches or threatens to breach the provisions of this Section 3.6(f) and the Company (by vote of a majority of the

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members of the Board) seeks an injunction against the Executive Management Shareholder, there is a reasonable probability of the Company’s eventual success on the merits and (z) if the Executive Management Shareholder breaches or threatens to breach the provisions of this Section 3.6(f) and the Company (by vote of a majority of the members of the Board) seeks an injunction against the Executive Management Shareholder, a balancing of equities will be in favor of the Company. Each Executive Management Shareholder consents and agrees that if the Executive Management Shareholder commits any such breach or threatens to commit any breach, the Company (by vote of a majority of the members of the Board) shall be entitled to temporary and permanent injunctive relief from a court of competent jurisdiction, without posting any bond or other security and without the necessity of proof of actual damage, in addition to, and not in lieu of, such other remedies as may be available to the Company for such breach, including the recovery of money damages. If any of the provisions of this Section 3.6(f) are determined to be wholly or partially unenforceable, each Executive Management Shareholder hereby agrees that this Agreement or any provision hereof may be reformed so that it is enforceable to the maximum extent permitted by law. If any of the provisions of this Section 3.6(f) are determined to be wholly or partially unenforceable in any jurisdiction, such determination shall not be a bar to or in any way diminish the Company’s right to enforce any such covenant in any other jurisdiction.

(g) So long as an Investor Shareholder constitutes an Eligible Investor Shareholder, the Company shall not, and shall not cause any of its Subsidiaries to, take any action, and shall take all actions as a shareholder within its power to prevent its Subsidiaries from taking any action to cause the board of KMGP to consist of less than a majority of individuals who qualify as independent directors under the Exchange Act and the standards established by each national securities exchange upon which securities of KMP are listed for trading.

(h) Except as otherwise provided in this Section 3.6(h) , the Company shall not, directly or indirectly, engage in any Charter Change of Control that does not constitute a Cash Change of Control (a “ Non-Cash Change of Control ”) without the unanimous affirmative vote of all holders of Shares unless the organizational documents and capital structure of the acquiring, surviving or resulting Person in the Non-Cash Change of Control preserve in all material respects the economic and other rights (including conversion, Transfer, distribution and governance rights as set forth in the Charter, the Bylaws and this Agreement) and characteristics and tax treatment, including on a relative basis, of the Investor Shareholders, the Class A Shares, the Class B Shares, the Class C Shares and the Class P Shares as they exist immediately prior to such Non-Cash Change of Control (a “ Replicated Change of Control ”) (and if such rights are so preserved, then the unanimity requirement stated above shall not apply and in lieu thereof, the regular approval requirements that would otherwise be applicable shall apply instead).

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(i) A determination that such Non-Cash Change of Control satisfies the requirements, set forth in paragraph (h) above, to be a Replicated Change of Control shall require approval by the following: (A) the Investor Shareholders holding Voting Securities representing a majority of the Total Voting Power then held by the Investor Shareholders that continue to hold Class A Shares, (B) Kinder (so long as Kinder (together with his Permitted Transferees) continues to hold Class A Shares), (C) the holders of Class B Shares representing a majority of the issued and outstanding Class B Shares (not to be unreasonably withheld or delayed) and (D) the holders of Class C Shares representing a majority of the issued and outstanding Class C Shares (not to be unreasonably withheld or delayed). If the requisite Shareholders approve a Non-Cash Change of Control as a Replicated Change of Control pursuant to this Section 3.6(h)(i) , then the holders of the Class A Shares, the Class B Shares and the Class C Shares shall receive the consideration proposed in such Replicated Change of Control for the Class A Shares, the Class B Shares and the Class C Shares, as applicable, and shall not receive the consideration provided for under Section D.1(e) of Article Fourth of the Charter for a Charter Change of Control.

(A) If the requisite shareholders, except for the holders of Class C Shares representing a majority of the issued and outstanding Class C Shares, approve a Non-Cash Change of Control as a Replicated Change of Control pursuant to Section 3.6(h)(i) , then the Company nevertheless may engage in such Non-Cash Change of Control and the holders of the Class A Shares and the Class B Shares shall receive the consideration proposed in the Replicated Change of Control for the Class A Shares and the Class B Shares, as applicable, and shall not receive the consideration provided for under Section D.1(e) of Article Fourth of the Charter for a Charter Change of Control, and the holders of the Class C Shares shall receive the consideration provided for the Class C Shares under Section D.1(e) of Article Fourth of the Charter for a Charter Change of Control (other than a Replicated Change of Control), provided that such Non-Cash Change of Control must be a bona fide transaction with a third party that is not an Affiliate of the Company (other than Kinder and his Affiliates (excluding any Person who is an Affiliate of Kinder solely as a result of such Person’s relationship with the Company and its Subsidiaries)) or any Investor Shareholder; provided , further , that such transaction may be with or involve KMP, KMR, EPB or their respective Subsidiaries or controlled Affiliates.

(B) The Company shall provide written notice to all Class C Shareholders of its intent to pursue a Non-Cash Change of Control pursuant to Section 3.6(h)(i)(A) . If the holders of Class C Shares representing a majority of the issued and outstanding Class

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C Shares elect to participate in such Non-Cash Change of Control by notifying the Company in writing within ten (10) calendar days after receipt of the Company’s notice, the holders of the Class C Shares shall receive the consideration proposed in such Non-Cash Change of Control for the Class C Shares and shall not receive the consideration provided for under Section D.1(e) of Article Fourth of the Charter for a Charter Change of Control.

(ii) Regardless of whether or not the holders of Class B Shares and/or the holders of Class C Shares have approved a Non-Cash Change of Control as a Replicated Change of Control pursuant to Section 3.6(h)(i) , (A) the Investor Shareholders holding Voting Securities representing a majority of the Total Voting Power then held by the Investor Shareholders that continue to hold Class A Shares and (B) Kinder (so long as Kinder (together with his Permitted Transferees) continues to hold Class A Shares), may agree in writing that such Non-Cash Change of Control shall not be subject to the requirement to be a Replicated Change of Control so long as such Non-Cash Change of Control (x) is a bona fide transaction with a third party that is not an Affiliate of the Company (other than Kinder and his Affiliates (excluding any Person who is an Affiliate of Kinder solely as a result of such Person’s relationship with the Company and its Subsidiaries)) or any Investor Shareholder; provided , further , that such transaction may be with or involve KMP, KMR, EPB or their respective Subsidiaries or controlled Affiliates and (y) provides for the holders of the Class A Shares, the Class B Shares and the Class C Shares to receive the consideration provided for under Section D.1(e) of Article Fourth of the Charter for a Charter Change of Control (other than a Replicated Change of Control).

(iii) The requirements of this Section 3.6(h) shall be in addition to any other approvals required by the Charter, the Bylaws or applicable law for a Non-Cash Change of Control.

(i) Kinder agrees that, from the date of this Agreement until May 31, 2015, Kinder shall notify the Eligible Investor Shareholders prior to Kinder (including his Permitted Transferees and, to the extent of his control, his Affiliates), directly or indirectly, effecting, or offering or proposing (whether publicly or otherwise) to effect, any acquisition of beneficial ownership of any securities of the Company or any of its Subsidiaries that are publicly traded in a transaction or a series of related transactions involving a value in excess of $50,000,000.

(j) The Company shall make one-time compensatory cash payments in an aggregate amount of approximately $100,000,000 to certain non-executive management employees of the Company and its Subsidiaries, which one-time payments shall be in addition to the Company’s usual periodic cash compensatory payments made to employees. The employee payees of such one-time payments and amount payable to

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each such employee payee shall be at the discretion of the Chief Executive Officer of the Company and the timing of such one-time payments shall be at the discretion of the Company’s management; provided , that such one-time payments shall be made reasonably promptly after the payment of the Company’s initial quarterly dividend following the consummation of the IPO; provided , further, that any such one-time payments to holders of Class B Shares or Class C Shares pursuant to this Section 3.6(j) shall be subject to approval by the board of directors pursuant to Section 3.12(i) of the Bylaws.

(k) Without limitation to any other rights granted to the Investor Shareholders by the Company pursuant to the Charter, Bylaws, this Agreement, or pursuant to applicable law, the Company shall provide each Investor Shareholder that holds Class A Shares or Related Shares or its designated agents or representatives with the right to inspect, audit, excerpt or copy the Company’s share registry, share transfer books and other documents and information related to the ownership of the Class A Shares, the Class B Shares, the Class C Shares and the Class P Shares as such Investor Shareholder may request, including the Phantom Class B Shares and Phantom Class C Shares of the Canadian Participants as well as the Class B Shares and Class C Shares held by the Canadian Plan Entity that correspond to such Phantom Class B Shares and Phantom Class C Shares, in order to confirm ownership calculations, in each case at such times during reasonable business hours as such Investor Shareholders shall reasonably request.

(l) In the event of an All Cash Tender Offer or a Non-Cash Tender Offer (each, a “ Tender Offer ”), the parties agree as follows:

(i) If such Tender Offer permits delivery of shares via a notice of guaranteed delivery, each Class A Shareholder intending to tender Class P Shares received upon a Voluntary Conversion of such Class A Shareholder’s Class A Shares into such Tender Offer shall use commercially reasonable efforts (and the Company shall reasonably cooperate in such efforts) to tender such Class P Shares into such Tender Offer via a notice of guaranteed delivery; provided , that tendering via a notice of guaranteed delivery does not impair, prejudice or otherwise adversely affect such Class A Shareholder’s ability to participate in or otherwise receive the benefits of such Tender Offer. If such Class A Shareholder does tender Class P Shares via a notice of guaranteed delivery pursuant to this Section 3.6(l)(i) , such Class A Shareholder shall issue a Conversion Notice to the Company and the Transfer Agent at a time as close as practicable to the then-current expiration time of such Tender Offer to ensure sufficient time for the conversion of such Class A Shares and the Transfer of such Class P Shares in accordance with the terms of such notice of guaranteed delivery and such Tender Offer, and, upon receipt of such Conversion Notice, the Company shall use its reasonable best efforts to ensure that such conversion and such Transfer occur in accordance with the terms of such notice of guaranteed delivery and such Tender Offer.

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(ii) In the event that such Tender Offer does not permit delivery of shares via a notice of guaranteed delivery, each Class A Shareholder intending to tender Class P Shares received upon a Voluntary Conversion of such Class A Shareholder’s Class A Shares into such Tender Offer and the Company shall use its commercially reasonable efforts to enable such Class A Shareholder to tender Class P Shares into such Tender Offer while preserving the relative economic rights (in a manner consistent with the intent and purpose of the Charter, the Bylaws and this Agreement) of the holders of Class A Shares, Class B Shares and Class C Shares to distributions and to Class P Shares (and distributions thereon) issuable upon conversion of their Class A Shares, Class B Shares and Class C Shares during the pendency of such Tender Offer. The parties acknowledge that there may be delays (which each of the parties shall use its reasonable best efforts to cooperate in keeping as short as practicable) in calculating the amount of distributions payable to the holders of Class A Shares, Class B Shares, Class C Shares and Class P Shares pursuant to Section C of Article Fourth of the Charter (in a manner consistent with the intent and purpose of the Charter, the Bylaws and this Agreement), or the number of Class P Shares issuable upon conversion of Class A Shares, Class B Shares and Class C Shares pursuant to Section D of Article Fourth of the Charter (in a manner consistent with the intent and purpose of the Charter, the Bylaws and this Agreement), in each case during the pendency of such Tender Offer, which may result in delays (which each of the parties shall use its reasonable best efforts to cooperate in keeping as short as practicable) in the payment of such distributions or the delivery of such Class P Shares to holders of Class A Shares, Class B Shares or Class C Shares. Without limiting the generality of the foregoing, the parties shall, to the extent necessary or appropriate to achieve the purpose and intent of this Section 3.6(l)(ii) , consider in good faith consenting to reasonable escrow mechanics (e.g., that contemplate the temporary placement of such distributions or such Class P Shares in escrow), which consents shall not be unreasonably withheld or delayed; provided , that each of the parties shall use its reasonable best efforts to cooperate in keeping any such escrow period as short as practicable; provided , further, that nothing in this Section 3.6(l)(ii) shall be interpreted to require any such Class A Shareholder to take, or refrain from taking, any action to the extent taking (or not taking) such action would impair, prejudice or otherwise adversely affect such Class A Shareholder’s ability to participate in or otherwise receive the benefits of such Tender Offer.

(iii) Terms used in this Section 3.6(l) but not defined in this Agreement shall have the meanings given such terms in the Charter.

(m) The Canadian Plan Entity shall be established in connection with

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the Company’s administration of the Canadian Plan for the Canadian Participants. Each Phantom Class B Share shall provide for payments, if any, in gross amounts and gross value no greater than (and shall have vesting and forfeiture provisions upon termination of employment no more favorable to the Canadian Participant holding such Phantom Class B Share than), the Class B Share held by the Canadian Plan Entity to which such Phantom Class B Share corresponds (including, for the avoidance of doubt, Class P Shares, if any, received upon automatic conversion of such corresponding Class B Share); provided , that, subject to the foregoing limitations and to the extent that the Company in good faith determines is necessary or appropriate to mitigate any negative consequences to either the Company or holders of Phantom Class B Shares, the Company may elect to make distributions in cash in lieu of Class P Shares received in respect of the automatic conversion of Class B Shares held by the Canadian Plan Entity that would otherwise be distributable as a result of such automatic conversion. Each Phantom Class C Share shall provide for payments, if any, in gross amounts and gross value no greater than the Class C Share held by the Canadian Plan Entity to which such Phantom Class C Share corresponds (including, for the avoidance of doubt, Class P Shares, if any, received upon automatic conversion of such corresponding Class C Share); provided , that, subject to the foregoing limitations and to the extent that the Company in good faith determines is necessary or appropriate to mitigate any negative consequences to either the Company or holders of Phantom Class C Shares, the Company may elect to make distributions in cash in lieu of Class P Shares received in respect of the automatic conversion of Class C Shares held by the Canadian Plan Entity that would otherwise be distributable as a result of such automatic conversion. Each Phantom Class B Share and each Phantom Class C Share shall have exactly one corresponding Class B Share and Class C Share, respectively, in each case held by the Canadian Plan Entity, and the automatic conversion of any such corresponding Class B Share or Class C Share into Class P Shares shall result in the cancellation of the applicable Phantom Class B Share or Phantom Class C Share. In the event that the Company elects to make a distribution in cash in lieu of Class P Shares pursuant to the foregoing provisos of this Section 3.6(m) , then the Company shall take all action necessary or appropriate for such Class P Shares to be immediately cancelled. All Phantom Class B Shares and Phantom Class C Shares shall at all times be held only by the Canadian Participants. Amendments, modifications or waivers of any provision of any organizational or other governing document of the Canadian Plan Entity or any governing or similar document of the Canadian Plan, in each case, shall require, in addition to any required approvals, the approval of (i) Kinder (so long as Kinder (together with his Permitted Transferees) owns at least 1.0% of the Total Voting Power), (ii) the Investor Shareholders holding Voting Securities representing a majority of the Total Voting Power then held by the Investor Shareholders (so long as the Investor Shareholders own at least an aggregate amount of 1.0% of the Total Voting Power), (iii) in the case of an amendment or modification that would modify the rights or obligations of any Investor Shareholder adversely, such Investor Shareholder so affected (so long as such Investor Shareholder owns any Voting Securities), (iv) in the case of an amendment or modification that would modify the rights or obligations of the holders of Class B Shares (taken as a whole) adversely as compared to the holders of other classes of Common Stock of the Company, the holders of Class B Shares holding Class B Shares

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representing a majority of the issued and outstanding Class B Shares and (v) in the case of an amendment or modification that would modify the rights or obligations of the holders of Class C Shares (taken as a whole) adversely as compared to the holders of other classes of Common Stock of the Company, the holders of Class C Shares holding Class C Shares representing a majority of the issued and outstanding Class C Shares.

2. Effect on Shareholders Agreement . Other than as specifically set forth herein, all other terms and provisions of the Shareholders Agreement shall remain unaffected by the terms of this Amendment, and shall continue in full force and effect.

3. Certain Provisions of Shareholders Agreement . The provisions of Sections 7.1 through 7.4 , and Section 7.7 through 7.9 , of the Shareholders Agreement shall be applicable to this Amendment mutatis mutandis .

4. Entire Agreement . This Amendment, together with the Agreement as amended hereby, constitutes the entire agreement and supersedes all other prior agreements, both written and oral, among the parties with respect to the subject matter hereof.

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IN WITNESS WHEREOF, the parties have caused this Amendment to be duly executed and delivered, all as of the date first set forth above.

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