Notes to Condensed Consolidated Financial Statements

(Unaudited)

Business

Spectrum Pharmaceuticals, Inc. (“Spectrum”, the “Company”, “we”, “our”, or “us”) is a biotechnology company with fully integrated commercial and drug development operations, with a primary focus in oncology and hematology. Our strategy is comprised of acquiring, developing and commercializing a broad and diverse pipeline of late-stage clinical and commercial products. We currently market three oncology drugs—FUSILEV® (levoleucovorin) for injection in the U.S., ZEVALIN® (ibritumomab tiuxetan) injection for intravenous use, for which we have worldwide rights and FOLOTYN® a folate analogue metabolic inhibitor designed to accumulate preferentially in cancer cells. We also have a diversified pipeline of product candidates in advanced-stage Phase 2 and Phase 3 studies. We have assembled an integrated in-house scientific team, including formulation development, clinical development, medical research, regulatory affairs, biostatistics and data management, and have established a commercial infrastructure for the marketing of our drug products. We also leverage the expertise of our worldwide partners to assist in the execution of our strategy.

Basis of Presentation

We have prepared the accompanying unaudited condensed consolidated financial statements, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim reporting. We have condensed or omitted certain information and footnote disclosures normally included in our annual financial statements prepared in accordance with generally accepted accounting principles (“GAAP”) pursuant to such rules and regulations. On April 1, 2012, Spectrum acquired the licensing rights to market ZEVALIN (the “ZEVALIN Rights”) outside of the U.S. On September 5, 2012, Spectrum acquired Allos Therapeutics, Inc. (“Allos”). Commencing April 1, 2012 and September 5, 2012, respectively, our financial statements include the assets, liabilities, operating results and cash flows of the ZEVALIN Rights and Allos.

The condensed consolidated financial statements include our accounts and our wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The unaudited condensed consolidated financial statements reflect all adjustments, which are normal and recurring, that are, in the opinion of management, necessary to fairly state the financial position as of June 30, 2013 and the results of operations and cash flows for the related interim periods ended June 30, 2013 and 2012. The results of operations and trends for the six months ended June 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013 or for any other periods. The unaudited financial statements included in this quarterly report should be read in conjunction with our audited financial statements for the year ended December 31, 2012, included in the Annual Report on Form 10-K filed with the SEC.

Significant Accounting Policies

The accounting policies followed by us and other information are contained in the notes to the Company’s audited consolidated financial statements for the year ended December 31, 2012 included in our Annual Report on Form 10-K filed on February 28, 2013 with the SEC. We have not changed our significant accounting policies as of June 30, 2013. You should read this Quarterly Report on Form 10-Q in connection with the information contained in our Annual Report on Form 10-K filed on February 28, 2013.

Variable Interest Entity

Our Canadian affiliate, Spectrum Pharma Canada, is owned 50% by us and was organized in Quebec, Canada in January 2008. We fund 100% of the expenditures and, as a result, we are the party with the controlling financial interest. We are the primary beneficiary of Spectrum Pharma Canada, which is determined to be a variable interest entity. As a result of this characterization, it is consolidated in our financial statements as though it is a wholly-owned subsidiary. We have eliminated all significant intercompany balances and transactions among the consolidated entities from the condensed consolidated financial statements.

Segment and Geographic Information

We operate in one reportable segment: acquiring, developing and commercializing prescription drug products. We evaluate all revenues by product in the aggregate given the similarity of product, production processes, customers, distribution methods and regulatory environment. Accordingly, we report the accompanying condensed consolidated financial statements in the aggregate, including all of our activities in one reportable segment.

7

Table of Contents

Use of Estimates

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and disclosure of contingent obligations in the financial statements and accompanying notes. The estimation process requires assumptions to be made about future events and conditions, and as such, is inherently subjective and uncertain. Actual results could differ materially from our estimates.

On an ongoing basis, we evaluate our estimates, including those related to deferred revenue recognition periods, inventories, the impairment of investments, the impairment of goodwill and long-lived assets, contingencies, accrued clinical trial expenses, stock-based compensation, and ongoing litigation, among other estimates. We base our estimates on historical experience and on other assumptions that management believes are reasonable under the circumstances. These estimates form the basis for making judgments about the carrying values of assets and liabilities when these values are not readily apparent from other sources.

Revenue Recognition

Revenue from product sales is recognized upon shipment of product when title and risk of loss have transferred to the customer. We sell our products to wholesalers and distributors of oncology products and directly to the end user, directly or through Group Purchasing Organizations or GPO’s (e.g., certain hospitals or hospital systems and clinics with whom we have entered into a direct purchase agreement). Our wholesalers and distributors purchase our products and sell the products directly to end users, which include, but are not limited to, hospitals, clinics, medical facilities, managed care facilities and private oncology based practices. Revenue from product sales is recognized upon shipment of product when title and risk of loss have transferred to the customer, and the following additional criteria are met:

Generally revenue is recognized when all four of the following criteria are met:

We calculate a provision for estimated product returns, sales discounts, rebates, chargebacks and distribution and data fees are established as a reduction of gross product sales at the time such revenues are recognized. Thus, revenue is recorded, net of such estimated provisions. We state the related accounts receivable at net realizable value, with any allowance for doubtful accounts charged to general operating expenses. If revenue from sales is not reasonably determinable due to provisions for estimates, promotional adjustments, price adjustments, returns or any other potential adjustments, we defer the revenue and recognize revenue when the estimates are reasonably determinable, even if the monies for the gross sales have been received.

We utilize a third-party logistics company to store and distribute FUSILEV. The same third party logistics company also stores and ships in the U.S. ZEVALIN kits containing the CD20 MAB.

During 2009, we changed the supply and distribution model for ZEVALIN in the U.S. Previously, we sold ZEVALIN kits containing the CD20 MAB to radiopharmacies, who in turn ordered the radioactive isotope (Y-90 or In-111) separately and radiolabeled (or attached) the radioactive isotope to the CD20 MAB. The radiopharmacy then sold the end user product to the consumer. Under the current model in the U.S. we do not sell the ZEVALIN kits containing the CD20 MAB to the radiopharmacies, but instead contract with them, as a fee-for-service, to radiolabel the individual components of the CD20 MAB to the radioactive isotope, and then, also under a fee-for-service arrangement, have them distribute the end use product to the end user; the clinics, hospitals or other medical settings. In this regard, we now sell the CD20 MAB together with the radioactive isotope in the U.S. as the end user product. In November 2011, we received FDA approval to remove the bioscan and starting in January 2012 we are no longer supplying the imaging kit (In-111) in the U.S. which was formerly used for the bioscan.

Beginning in the second quarter of 2013, we terminated our transition services agreement with Bayer Pharma AG and transitioned to a sales distribution model in Europe. Sales of ZEVALIN to certain new customers will be recognized on a cash basis until collectability is reasonably assured.

8

Table of Contents

Product Returns Allowances

Customers are typically permitted to return products within thirty days after shipment, if incorrectly shipped or not ordered, and six months after the expiration of product dating for FUSILEV, subject to certain restocking fees and preauthorization requirements, as applicable. The returned product is destroyed if it is damaged, quality is compromised or past its expiration date. In general, returned product is not resold. As of each balance sheet date, we estimate potential returns, based on several factors, including: inventory held by distributors, sell through data of distributor sales to end users, customer and end-user ordering and re-ordering patterns, aging of accounts receivables, rates of returns for directly substitutable products and pharmaceutical products for the treatment of therapeutic areas similar to indications served by our products, shelf life of our products, historical rates of actual returns and based on experience of our management with selling similar oncology products. We record an allowance for future returns by reducing product sales and crediting a reserve for returns to increase other accrued obligations at the time of the product sales. No returns reserve is recorded for ZEVALIN since in the U.S. we invoice our end user customers and recognize revenues only when a patient is treated with ZEVALIN and for Ex. U.S. we invoice upon delivery. FOLOTYN returns are limited to defective product or product that was shipped in error.

Government Chargebacks

Our products are subject to certain programs with federal government qualified entities whereby pricing on products is discounted below distributor list price to participating entities. These entities purchase products through distributors at the discounted price, and the distributors charge the difference between their acquisition cost and the discounted price back to us. We account for chargebacks by reducing revenue and establishing an accrual in an amount equal to our estimate of chargeback claims at the time of product sale. We also evaluate the adequacy of previously recorded chargebacks based on data regarding specific entities claims activity over time to adjust current period chargebacks for these same distributors. Due to estimates and assumptions inherent in determining the amount of government chargebacks, the time lag to receive information from distributors, the actual amount of claims for chargebacks may be materially different from our estimates, at which time we would adjust our reserves accordingly.

Discounts

Discounts (generally prompt payment discounts) are accrued at the end of every reporting period based on the gross sales made to customers during the period and based on their terms of trade for a product. We generally review the terms of the contracts, specifically price and discount structures, and payment terms between the customer and us to estimate the discount accrual.

Rebates

Customer rebates are estimated at every period end, based on direct purchases, depending on whether any rebates have been offered based on definitive contractual agreements. The rebates are recognized when products are purchased and a periodic credit is given.

Medicaid Rebates

Our products are subject to state government-managed Medicaid programs whereby discounts and rebates are provided to participating state governments. We record estimated rebates payable under governmental programs, including Medicaid, as a reduction of revenue in the same period the related sale is recorded. Our calculations related to these rebate accruals require estimates, including estimates of customer mix primarily based on a combination of market and clinical research, to determine which sales will be subject to rebates and the amount of such rebates. Our estimate of utilization is based on historical claims and supplemented by management’s judgment with respect to many factors, including changes in sales trends, an evaluation of current laws and regulations and product pricing. We update our estimates and assumptions each period and record any necessary adjustments to our reserves. Commencing in the second quarter of 2013, we refined our methodology to estimate rebate claims remaining in channel inventory which resulted in a $1.0 million increase in the Medicaid rebate accrual at June 30, 2013 and corresponding increase to net loss for the three and six months ended June 30, 2013. Additionally, there is a time lag between the date we determine the estimated liability and when we actually pay the liability. Although allowances and accruals are recorded at the time of product sale, certain rebates are typically paid out, on average, up to six months or longer after the sale.

Distribution and Data Fees

Distribution and data fees are paid to authorized wholesalers and specialty distributors of FUSILEV and FOLOTYN as a percentage of WAC for products sold which is a reduction of revenue in the same period the related sale is recorded. The services provided include contract administration, inventory management, product sales reporting by customer and returns for clinics and hospitals. We accrue distribution and data fees based on a percentage of FUSILEV and FOLOTYN revenues that are set and governed by distribution agreements.

9

Table of Contents

Accounts Receivable

We also state the related accounts receivable at net realizable value, with any allowance for doubtful accounts charged to general operating expenses. If revenue from sales is not reasonably determinable due to provisions for estimates, promotional adjustments, price adjustments, returns or any other potential adjustments, we defer the revenue and recognize revenue when the estimates are reasonably determinable, even if the monies for the gross sales have been received.

Milestone Payments

Milestone payments under collaborative arrangements are triggered either by the results of our research and development efforts or by specified sales results by a third-party collaborator. Milestones related to our development-based activities may include initiation of various phases of clinical trials, successful completion of a phase of development or results from a clinical trial, acceptance of a New Drug Application by the FDA or an equivalent filing with an equivalent regulatory agency in another territory, or regulatory approval by the FDA or by an equivalent regulatory agency in another territory. Due to the uncertainty involved in meeting these development-based milestones, the development-based milestones are considered to be substantial (i.e. not just achieved through passage of time) at the inception of the collaboration agreement. In addition, the amounts of the payments assigned thereto are considered to be commensurate with the enhancement of the value of the delivered intellectual property as a result of our performance. Our involvement is necessary to the achievement of development-based milestones. We would account for development-based milestones as revenue upon achievement of the substantive milestone events. Milestones related to sales-based activities may be triggered upon events such as the first commercial sale of a product or when sales first achieve a defined level. These sales-based milestones would be achieved after the completion of our development activities. We would account for the sales-based milestones in the same manner as royalties, with revenue recognized upon achievement of the milestone. In addition, upon the achievement of either development-based or sales-based milestone events, we have no future performance obligations related to any milestone payments.

License Fees

We recognize license fees based on the facts and circumstances of each contractual agreement. In general, we recognize income upon the signing of a contractual agreement that grants rights to products or technology to a third party if we have no further obligation to provide products or services to the third party after entering into the contract.

Research and Development

Research and development expenses include salaries and benefits, clinical trial and related manufacturing costs, contract and other outside service fees, and facilities and overhead costs related to our research and development efforts. Research and development expenses also consist of costs incurred for proprietary and collaborative research and development and include activities such as product registries and investigator-sponsored trials. Research and development costs are expensed as incurred. In certain instances, we enter into agreements with third parties for research and development activities, where we may prepay fees for services at the initiation of the contract. We record such prepayment as a prepaid asset and charge research and development expense over the period of time the contracted research and development services are performed. Other types of arrangements with third parties may be fixed fee or fee for service, and may include monthly payments or payments upon the completion of milestones or receipt of deliverables.

As of each balance sheet date, we review purchase commitments and accrue drug development expenses based on factors such as estimates of work performed, patient enrollment, completion of patient studies and other events. We maintain regular communication with our vendors, including our clinical sites, and gauge the reasonableness of estimates provided. However, actual clinical trial costs may differ materially from estimated clinical trial costs and are adjusted for in the period in which they become known.

Goodwill and Intangible Assets

Goodwill represents the excess of acquisition cost over the fair value of the net assets of the acquired businesses. Goodwill has an indefinite useful life and is not amortized, but instead tested for impairment annually unless there are interim impairment indicators. We perform our annual evaluation as of October 1 each year.

Intangible assets are reviewed for impairment when facts or circumstances suggest that the carrying value of these assets may not be recoverable. Our policy is to identify and record impairment losses, if necessary, on intangible product rights when events and circumstances indicate that the assets might be impaired and the undiscounted cash flows estimated to be generated by those assets are less than the carrying amounts of those assets. It is our policy to expense costs as incurred in connection with the renewal or extension of its intangible assets.

We acquired 50% of the rights in RIT in December 2008 and the remaining 50% in March 2009. The purchase price for the acquisition of ZEVALIN rights was allocated to identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the acquisition date which is being amortized over its useful life of 10 years. Such a valuation requires significant estimates and assumptions including but not limited to: determining the timing and expected costs to complete the in-process projects, projecting regulatory approvals, estimating future cash flows from product sales resulting from in-process projects, and developing appropriate discount rates and probability rates by project. We believe the fair values assigned to the assets acquired and liabilities assumed are based on reasonable assumptions.

10

Table of Contents

Identifiable intangible assets with definite lives are amortized on a straight-line basis over their estimated useful lives, ranging from 1 to 10 years.

We acquired all of the oncology drug assets of Targent in April 2006. As part of the consideration for the purchase of these assets, we agreed to pay milestone payments to Targent upon the achievement of certain regulatory events as well as for certain sales levels for FUSILEV within a calendar year. During 2011, we capitalized $16.8 million associated with the achievement of these milestones which are being amortized to cost of product sales sold on a straight-line basis over the estimated useful life of 8.7 years.

On April 1, 2012, we acquired the licensing rights to market ZEVALIN outside of the U.S. (ZEVALIN Rights) from Bayer Pharma AG or Bayer. The process for estimating the fair values of these identifiable intangible assets involved the use of significant estimates and assumptions, including estimating future cash flows and developing appropriate discount rates. These identified intangible assets are being amortized over the estimated useful life of 10 years.

We acquired Allos on September 5, 2012, and recorded intangible assets related to license and distribution rights and in-process research and development. The license and distribution rights are amortized over the expected patent life of 10 years. The fair value of the acquired in-process research and development and license and distribution agreement intangible assets was estimated using the income approach. The income approach uses valuation techniques to convert future amounts to a single present amount (discounted). Our measurement is based on the value indicated by current market expectations about those future amounts. The fair value considered our estimates of future incremental earnings that may be achieved by the intangible assets.

With respect to the acquisition we believe the fair values assigned to the assets acquired and liabilities assumed were based upon reasonable assumptions. Our allocation of the purchase price was largely dependent on discounted cash flow analyses of projects and products of Allos. We cannot provide assurance that the underlying assumptions used to forecast the cash flows or the timely and successful completion of such projects will materialize as we estimated. For these reasons, among others, our actual results may vary significantly from the estimated results.

On March 8, 2013, we acquired the global development and commercialization rights to Captisol-enabled®, propylene glycol-free (PG-free) melphalan and capitalized $7.7 million associated with the in process research and development.

On May 29, 2013, we amended our agreement with Mundipharma (see Notes 6 and 10).

We evaluate the recoverability of indefinite and definite intangible assets whenever events or changes in circumstances indicate that an intangible asset’s carrying amount may not be recoverable. Such circumstances could include, but are not limited to the following:

We measure the carrying amount of the asset against the estimated undiscounted future cash flows associated with it. Should the sum of the expected future net cash flows be less than the carrying value of the asset being evaluated, an impairment loss would be recognized. The impairment loss would be calculated as the amount by which the carrying value of the asset exceeds its fair value. We recorded an impairment loss of $1.0 million during the three and six months ended June 30, 2013 related to the amendment of the Mundipharma agreement in May 2013. There were no other impairment losses recorded during the quarters ended June 30, 2013 or 2012.

Acquisitions and Collaborations

For all in-licensed products, we perform an analysis to determine whether we hold a variable interest or interests that give us a controlling financial interest in a variable interest entity. On the basis of our interpretations and conclusions, we determine whether the acquisition falls under the purview of variable interest entity accounting and if so, consider the necessity to consolidate the acquisition. As of June 30, 2013, we determined there were no variable interest entities required to be consolidated other than our Canadian affiliate, Spectrum Pharma Canada.

We also perform an analysis to determine if the inputs and/or processes acquired in an acquisition qualify as a business. On the basis of our interpretations and conclusions, we determine if the in-licensed products qualify as a business and whether to account for such products as a business combination or an asset acquisition. The accounting for acquisitions requires extensive use of estimates and judgments to measure the fair value of the identifiable tangible and intangible assets acquired, including in-process research and development, and liabilities assumed. Additionally, we must determine whether an acquired entity is considered to be a business or a set of net assets, because the excess of the purchase price over the fair value of net assets acquired can only be recognized as goodwill in a business combination. The excess of the purchase price over the fair value of the net assets acquired can only be recognized as goodwill in a business combination.

11

Table of Contents

Foreign Currency Translation

We translate the assets and liabilities of our foreign subsidiaries stated in local functional currencies to US dollars at the rates of exchange in effect at the end of the period. Revenues and expenses are translated using rates of exchange in effect during the period. Gains and losses from the translation of financial statements denominated in foreign currencies are included as a separate component of accumulated other comprehensive income (loss) in the statement of comprehensive income (loss).

We record foreign currency transactions at the exchange rate prevailing at the date of the transaction with resultant gains and losses being included in results of operations. Foreign currency transaction gains and losses have not been significant for any period presented.

Comprehensive Income (Loss)

Comprehensive income (loss) is calculated in accordance with authoritative guidance which requires the disclosure of all components of comprehensive income, including net income (loss) and changes in equity during a period from transactions and other events and circumstances generated from non-owner sources. Our accumulated other comprehensive income (loss) at June 30, 2013 and 2012, respectively consisted primarily of foreign currency translation adjustments and net unrealized gains/losses on investments in marketable securities as of that date.

Recently Adopted Accounting Standards

In February 2013, the Financial Accounting Standards Board (the “FASB”) issued an accounting standards update that requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amounts are required to be reclassified in their entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference to other disclosures that provide additional detail about those amounts. This guidance became effective for reporting periods beginning after December 15, 2012, with early adoption permitted. We adopted the provisions of the guidance in the first quarter of 2013 and had no significant reclassifications out of accumulated other comprehensive income to net loss during the six months ended June 30, 2013.

In July 2012, the FASB issued an accounting standards update that gives an entity the option to first assess qualitative factors to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired. If, after assessing the totality of events and circumstances, an entity concludes that it is not more likely than not that the indefinite-lived intangible asset is impaired, then the entity is not required to take further action. This guidance became effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012, with early adoption permitted. We adopted the provisions of the guidance in the first quarter of 2013. The adoption did not have a material impact on our consolidated financial statements.

New Accounting Standards Not Yet Adopted

In March 2013, the FASB issued an accounting standards update that provides guidance on the accounting for the cumulative translation adjustment (the “CTA”) upon derecognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. Under this guidance, an entity should recognize the CTA in earnings based on meeting certain criteria, including when it ceases to have a controlling financial interest in a subsidiary or group of assets within a consolidated foreign entity or upon a sale or transfer that results in the complete or substantially complete liquidation of the foreign entity in which the subsidiary or group of assets resides. This guidance will be effective for fiscal years beginning on or after December 15, 2013, which will be our fiscal year 2014, with early adoption permitted. We currently do not expect the adoption of the guidance will have a material impact on our consolidated financial statements.

Basic and Diluted Earnings (Loss) per Share

We calculate basic and diluted net income (loss) per share using the weighted average number of common shares outstanding during the periods presented, and adjust the amount of net income (loss) used in this calculation for preferred stock dividends (if any) declared during the period. In periods of a net loss position, basic and diluted loss per share are the same. For the diluted earnings per share calculation, we adjust the weighted average number of common shares outstanding to include dilutive stock options, warrants and other common stock equivalents outstanding during the period.

12

Table of Contents

The following table sets forth the number of shares excluded from the computation of diluted earnings per share, as their inclusion would be anti-dilutive:

The following table sets forth the number of shares excluded from the computation of diluted earnings per share, as their inclusion would be anti-dilutive:

13

Table of Contents

Acquisition of Rights to Captisol-Enabled® Melphalan

On March 8, 2013, we completed the acquisition of exclusive global development and commercialization rights to Captisol-enabled®, propylene glycol-free melphalan from CyDex Pharmaceuticals, Inc. a wholly-owned subsidiary of Ligand Pharmaceuticals Incorporated (“Ligand”). The Captisol-enabled melphalan product candidate is currently in a pivotal trial being conducted by Ligand for use as a conditioning treatment prior to autologous stem cell transplant for patients with multiple myeloma. Pursuant to the license agreement, Spectrum assumed the responsibility for the ongoing clinical and regulatory development of the program going forward. Under the agreement, Ligand received a license fee of $3.0 million on April 1, 2013 and is eligible to receive milestone payments upon achievement of certain regulatory and net sales thresholds, as well as royalties upon successful commercialization based on a percentage of net sales of the licensed products in all territories.

We accounted for the acquisition of the rights as a business combination using the acquisition method of accounting which requires, among other things, that assets acquired and liabilities assumed be recognized at their fair values as of the purchase date and be recorded on the balance sheet regardless of the likelihood of success of the related product or technology. The process for estimating the fair values of identifiable intangible assets involves the use of significant estimates and assumptions, including estimating future cash flows and developing appropriate discount rates. Transaction costs are not included as a component of consideration transferred and were expensed as incurred. The related transaction costs expensed for the three months ended March 31, 2013 were approximately $15,000. There were no corresponding expenses for the three months ended June 30, 2013.

Fair Value Estimate of Asset Acquired and Liability Assumed

The total purchase consideration is allocated to the acquisition of the net tangible and intangible assets based on their estimated fair values as of the closing date. The allocation of the total purchase price to the net assets acquired is as follows ($ in 000’s):

14

Table of Contents

Acquired in-process research and development (“IPR&D) is an intangible asset classified as an indefinite-lived asset until the completion or abandonment of the associated R&D effort, and will be amortized over an estimated useful life to be determined at the date the project is completed. Intangible IPR&D is not amortized during the period that it is considered indefinite-lived but rather tested for impairment.

We estimated the fair value of the in-process research and development using the income approach. The income approach uses valuation techniques to convert future amounts to a single present amount (discounted). Our measurement is based on the value indicated by current market expectations about those future amounts. The fair value estimate took into account our estimates of future incremental earnings that may be achieved upon regulatory approval, promotion and distribution associated with the rights, and included estimated cash flows of approximately 10 years and a discount rate of approximately 25%.

The fair value of the contingent consideration liability assumed was determined using the probability of success and the discounted cash flow method of the income approach assuming the U.S. Food and Drug Administration, or FDA, approval of Captisol-enabled® melphalan is will occur on or about December 31, 2015. Upon receipt of regulatory approval, Spectrum will be obligated to make a milestone payment to Ligand.

We do not consider the acquisition of the global development and commercialization rights to Captisol-enabled®, propylene glycol-free melphalan to be a material business combination and, therefore, have not disclosed the pro forma results of operations as required for material business combinations.

Allos Acquisition

Spectrum acquired Allos Therapeutics, Inc. on September 5, 2012 as discussed further in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012 filed on February 27, 2013. The results of operations of the Allos acquisition are included in the accompanying condensed consolidated statements of operations for the three and six months ended June 30, 2012. The pro forma results of operations are prepared for comparative purposes only and do not necessarily reflect the results that would have occurred had the acquisition occurred at the beginning of the years presented or the results which may occur in the future. The following unaudited pro forma results of operations for the three and six months ended June 30, 2012 assume the Allos acquisition had occurred on January 1, 2012 ($ in 000’s):

As of June 30, 2013, we held substantially all of our cash, equivalents and marketable securities at major financial institutions, which must invest our funds in accordance with our investment policy with the principal objectives of such policy being preservation of capital, fulfillment of liquidity needs and above market returns commensurate with preservation of capital. Our investment policy also requires that investments in marketable securities be in only highly rated instruments, which are primarily US treasury bills or US treasury backed securities, with limitations on investing in securities of any single issuer. We maintain cash balances in excess of federally insured limits in reputable financial institutions. To a limited degree, the Federal Deposit Insurance Corporation and third parties insure these investments. However, these investments are not insured against the possibility of a complete loss of earnings or principal and are inherently subject to the credit risk related to the continued credit worthiness of the underlying issuer and general credit market risks. We manage such risks on our portfolio by investing in highly liquid, highly rated instruments and limit investing in long-term maturity instruments.

15

Table of Contents

Cash, equivalents and marketable securities, including long term bank certificates of deposits, and investments totaled $127.9 million and $145.5 million as of June 30, 2013 and December 31, 2012, respectively. Long term bank certificates of deposit include a $250,000 restricted certificate of deposit that collateralizes tenant improvement obligations to the lessor of our principal offices. The following is a summary of such investments (in 000’s):

As of June 30, 2013, none of the securities had been in a continuous unrealized loss position longer than one year.

We measure fair value based on the prices that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are based on a three-tier hierarchy that prioritizes the inputs used to measure fair value. These tiers include the following:

Level 1:  Quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date. The fair value hierarchy gives the highest priority to Level 1 inputs.

Level 2:  Observable prices that are based on inputs not quoted on active markets, but corroborated by market data. These inputs include quoted prices for similar assets or liabilities; quoted market prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3:  Unobservable inputs are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.

In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as consider counterparty credit risk in the assessment of fair value. Cash equivalents consist of certificates of deposit and are valued at cost, which approximates fair value due to the short-term maturities of these instruments. Marketable securities consist of certificates of deposit, US Government Treasury bills, US treasury-backed securities and corporate deposits, which are stated at fair value as it approximates carrying value due to the short term maturities of these instruments.

The fair value of the deferred development cost liability and the deferred payment contingency was valued using the discounted cash flow method of the income approach. The unobservable inputs in the valuation models that have the most significant effect on the fair value of our deferred development cost liability and deferred payment contingency are the determination of the present value factors for future cash flows. The assumptions included internal estimates of research and development personnel needed to perform the research and development services; and estimates of expected cash outflows to third parties for services and supplies over the expected period that the services will be performed, approximately through 2022 for the research and development obligations. We determined the present value factor to be a weighted-average cost of capital of approximately 11.0% in 2013 and 2012.

16

Table of Contents

The fair value of the other long-term liability was classified as Level 3 and valued using the probability of success and the discounted cash flow method of the income approach assuming the FDA approval of Captisol-enabled® melphalan will occur on or about December 31, 2015.

A majority of our financial assets have been classified as Level 2. These assets have been initially valued at the transaction price and subsequently valued utilizing third party pricing services. The pricing services use many observable market inputs to determine value, including reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, current spot rates and other industry and economic events. We validate the prices provided by our third party pricing services by understanding the models used, obtaining market values from other pricing sources, analyzing pricing data in certain instances and confirming those securities trade in active markets.

We did not elect the fair value option, as allowed, to account for financial assets and liabilities that were not previously carried at fair value. Therefore, material financial assets and liabilities that are not carried at fair value, such as trade accounts receivable and payable, are reported at their historical carrying values.

The fair value of the deferred development costs and deferred payment contingency are measured at the end of each reporting period using Level 3 inputs. The significant unobservable assumptions we use include the determination of present value factors for future cash flows.

The carrying values of our cash and cash equivalents, marketable securities, other securities and common stock warrants, carried at fair value as of June 30, 2013 are classified in the table below in one of the three categories of the fair value hierarchy described below:

17

Table of Contents

The following summarizes the activity of Level 3 inputs measured on a recurring basis:

In connection with the Allos Acquisition, we entered into a credit agreement on September 5, 2012, or Credit Agreement, with Bank of America, N.A, as the administrative agent and Wells Fargo Bank, N.A, as an initial lender. The Credit Agreement provides us with a committed $75 million revolving line of credit facility, or Credit Facility. We may increase the Credit Facility up to $125 million, subject to meeting certain customary conditions and obtaining commitments for such increase from the lenders. The Credit Facility expires on September 5, 2014.

The Credit Facility bears interest, at our election, at a rate equal to the London Interbank Offer Rate, or LIBOR rate, or the base rate, plus an applicable margin (4.25% at June 30, 2013). The applicable margin is as follows:

The base rate is subject to a floor that is 100 basis points above the LIBOR rate. The LIBOR rate does not include a floor and, with respect to it, interest periods of 1, 2, 3 and 6 months may be selected. Related interest expense was $572,000 for the six months ended June 30, 2013.

We incurred $976,000 in related loan costs and fees, which were deferred and will be amortized using the effective interest method over 24 months, the term of the Credit Facility. Amortization expense included in interest expense in the accompanying condensed consolidated statements of operations was $244,000 and $0 for the six months ended June 30, 2013 and 2012.

An unused line fee is payable quarterly in an amount ranging from 0.375 to 0.625% of the sum of the average daily unused portion of the facilities during any quarter based upon consolidated leverage ratio as at the last test date. A customary fee is also payable to the administrative agent on an annual basis in advance. Related interest expense for the unused line fee was $118,000 for the six months ended June 30, 2013.

The direct and indirect domestic subsidiaries of the Company, including Allos, as a new wholly-owned subsidiary, guaranty our obligations under the Credit Facility.

The Credit Agreement includes the following quarterly financial covenants:

18

Table of Contents

In addition, the Credit Agreement includes certain negative covenants that, subject to exceptions, limit our ability to, among other things incur additional indebtedness, engage in future mergers, consolidations, liquidations and dissolutions, sell assets, pay dividends and distributions on or repurchase capital stock, and enter into or amend other material agreements. The Credit Agreement also includes certain customary representations and warranties, affirmative covenants and events of default, which are set forth in more detail in the Credit Agreement.

On the closing date of September 5, 2012, we drew $50 million on the Credit Facility and used the proceeds to pay a portion of the purchase price for Allos. At June 30, 2013, $50 million was outstanding on the Credit Facility and there was $25 million available to borrow. At June 30, 2013, we were in compliance with all financial covenants. In July 2013, we repaid $25 million of the then outstanding balance.

Additional revolving loans may be drawn and all revolving loans may be repaid and re-borrowed from time to time in an amount not to exceed the total commitment amount. Any such loan proceeds may be used for working capital and other general corporate purposes for us or our subsidiaries.

Amendment to Credit Agreement

On July 16, 2013, we entered into an amendment to the Credit Agreement dated as of September 5, 2012 with Bank of America, N.A., in its capacity as administrative agent for the lenders and other parties signatory thereto, to, among other things, permit the acquisition of Talon Therapeutics, Inc., reduce the maximum aggregate borrowing amount under the revolving line of credit to $50 million, and to revise the interest rate on borrowings under the revolving line of credit.

Intangible assets consist of the following ($ in 000’s):