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UNITED STATES


SECURITIES AND EXCHANGE COMMISSION


Washington, D.C. 20549





FORM 10-Q


(Mark One)


RQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934


For the Quarterly Period Ended March 31, 2011





or





qTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934


For the Transition Period from _____________ to _____________





Commission File Number:  000-30111





Lexicon Pharmaceuticals, Inc.


(Exact Name of Registrant as Specified in its Charter)


Delaware76-0474169(State or Other Jurisdiction ofIncorporation or Organization)(I.R.S. EmployerIdentification Number)





8800 Technology Forest Place


The Woodlands, Texas 77381


(Address of Principal Executive Offices and Zip Code)





(281) 863-3000


(Registrant’s Telephone Number, Including Area Code)





Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.


YesþNo





Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).


YesNo





Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.





Large accelerated filer  Accelerated filer  þ  Non-accelerated filer  Smaller reporting company





Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).


YesNoþ





As of May 3, 2011 , 337,659,869 shares of the registrant’s common stock, par value $0.001 per share, were outstanding.


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Lexicon Pharmaceuticals, Inc.





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PageFactors Affecting Forward-Looking Statements2Part I – Financial Information3Item 1.Financial Statements3Consolidated Balance Sheets – March 31, 2011 (unaudited) and December 31, 20103Consolidated Statements of Operations (unaudited) – Three Months Ended March 31, 2011 and 20104Consolidated Statements of Stockholders’ Equity (unaudited) – Three Months Ended March 31, 2011 and 20105Consolidated Statements of Cash Flows (unaudited) – Three Months Ended March 31, 2011 and 20106Notes to Consolidated Financial Statements (unaudited)7Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations14Item 3.Quantitative and Qualitative Disclosures About Market Risk19Item 4.Controls and Procedures19Part II – Other Information19Item 1.Legal Proceedings20Item 1A.Risk Factors20Item 2.Unregistered Sales of Equity Securities and Use of Proceeds22Item 6.Exhibits22Signatures23





The Lexicon name and logo, OmniBank ® and LexVision ® are registered trademarks and Genome5000 TM is a trademark of Lexicon Pharmaceuticals, Inc.





——————





Factors Affecting Forward Looking Statements





This quarterly report on Form 10-Q contains forward-looking statements.  These statements relate to future events or our future financial performance. We have attempted to identify forward-looking statements by terminology including “anticipate,” “believe,” “can,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “should” or “will” or the negative of these terms or other comparable terminology. These statements are only predictions and involve known and unknown risks, uncertainties and other factors, including the risks outlined under “Part II, Item 1A. – Risk Factors,” that may cause our or our industry’s actual results, levels of activity, performance or achievements to be materially different from any future results, levels or activity, performance or achievements expressed or implied by these forward-looking statements.





Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. We are not under any duty to update any of the forward-looking statements after the date of this quarterly report on Form 10-Q to conform these statements to actual results, unless required by law.





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Part I – Financial Information





Item 1.                 Financial Statements





Lexicon Pharmaceuticals, Inc.





Consolidated Balance Sheets


(In thousands, except par value)





As of March 31,As of December 31,20112010Assets(unaudited)Current assets:Cash and cash equivalents$20,118$47,208Short-term investments, including restricted investments of $430168,792163,903Accounts receivable, net of allowances of $35831744Prepaid expenses and other current assets3,4482,883Total current assets193,189214,738Property and equipment, net of accumulated depreciation and amortization of $82,253 and $80,323, respectively51,81553,427Goodwill44,54344,543Other intangible assets53,55753,557Other assets304619Total assets$343,408$366,884Liabilities and EquityCurrent liabilities:Accounts payable$5,452$3,159Accrued liabilities7,6886,264Current portion of deferred revenue185214Current portion of long-term debt1,1551,138Total current liabilities14,48010,775Deferred revenue, net of current portion14,21214,212Long-term debt27,04427,345Deferred tax liabilities18,74518,745Other long-term liabilities49,61048,783Total liabilities124,091119,860Commitments and contingenciesEquity:Preferred stock, $.01 par value; 5,000 shares authorized; no shares issued and outstanding——Common stock, $.001 par value; 900,000 shares authorized; 337,875 and 337,566 shares issued, respectively338338Additional paid-in capital922,319920,324Accumulated deficit(703,035)(673,406)Accumulated other comprehensive gain405Treasury stock, at cost, 218 and 158 shares, respectively(345)(237)Total equity219,317247,024Total liabilities and equity$343,408$366,884





The accompanying notes are an integral part of these consolidated financial statements.





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Lexicon Pharmaceuticals, Inc.





Consolidated Statements of Operations


(In thousands, except per share amounts)


(Unaudited)





Three Months Ended March 31,20112010Revenues:Collaborative research$516$1,641Subscription and license fees80—Total revenues5961,641Operating expenses:Research and development, including stock-based compensation of $839 and $806, respectively23,92121,088Increase in fair value of Symphony Icon, Inc. purchase liability1,058—General and administrative, including stock-based compensation of $633 and $499, respectively4,7535,519Total operating expenses29,73226,607Loss from operations(29,136)(24,966)Gain on investments, net—88Interest income87217Interest expense(607)(727)Other income (expense), net27(682)Consolidated net loss$(29,629)$(26,070)Consolidated net loss per common share, basic and diluted$(0.09)$(0.13)Shares used in computing consolidated net loss per common share, basic and diluted337,527197,239








The accompanying notes are an integral part of these consolidated financial statements.





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Lexicon Pharmaceuticals, Inc.





Consolidated Statements of Stockholders’ Equity


(In thousands)


(Unaudited)








Lexicon Pharmaceuticals, Inc. StockholdersCommon StockAdditionalAccumulated OtherSharesPar ValuePaid-In CapitalAccumulated DeficitComprehensive Gain (Loss)Treasury StockTotalNoncontrolling InterestTotal EquityBalance at December 31, 2009175,785$176$733,874$(570,175)$—$(88)$163,787$(290)$163,497Deconsolidation of Symphony Icon———————290290Cumulative-effect adjustment for adoption of new accounting principle———(1,456)——(1,456)—(1,456)Stock-based compensation——1,305———1,305—1,305Issuance of common stock, net of fees161,770162181,309———181,471—181,471Exercise of common stock options7—17———17—17Repurchase of common stock—————(149)(149)—(149)Net loss———(26,070)——(26,070)—(26,070)Balance at March 31, 2010337,562$338$916,505$(597,701)$—$(237)$318,905$—$318,905Balance at December 31, 2010337,566$338$920,324$(673,406)$5$(237)$247,024$—$247,024Stock-based compensation——1,472———1,472—1,472Grant of stock in lieu of bonus201—363———363—363Exercise of common stock options108—160———160—160Repurchase of common stock—————(108)(108)—(108)Net loss———(29,629)——(29,629)—(29,629)Unrealized gain on investments————35—35—35Comprehensive loss(29,594)(29,594)Balance at March 31, 2011337,875$338$922,319$(703,035)$40$(345)$219,317$—$219,317








The accompanying notes are an integral part of these consolidated financial statements.





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Lexicon Pharmaceuticals, Inc.





Consolidated Statements of Cash Flows


(In thousands)


(Unaudited)





Three Months Ended March 31,20112010Cash flows from operating activities:Consolidated net loss$(29,629)$(26,070)Adjustments to reconcile consolidated net loss to net cash used in operating activities:Depreciation1,3071,380Impairment of fixed assets800—Amortization of Symphony Icon, Inc. purchase option—678Change in fair value of Symphony Icon, Inc. purchase liability1,058—Stock-based compensation1,4721,305Net gain on auction rate securities (“ARS”) and ARS Rights—(88)Gain on disposal of property and equipment(31)—Changes in operating assets and liabilities:Increase in accounts receivable(87)(737)(Increase) decrease in prepaid expenses and other current assets(565)3,285Decrease in other assets31524Increase (decrease) in accounts payable and other liabilities3,849(1,111)Decrease in deferred revenue(29)(366)Net cash used in operating activities(21,540)(21,700)Cash flows from investing activities:Purchases of property and equipment(507)(485)Proceeds from disposal of property and equipment439Purchases of investments(33,895)—Maturities of investments29,0412,575Net cash provided by (used in) investing activities(5,318)2,099Cash flows from financing activities:Proceeds from issuance of common stock160181,488Repurchase of common stock(108)(149)Proceeds from debt borrowings—750Repayment of debt borrowings(284)(2,916)Net cash provided by (used in) financing activities(232)179,173Net increase (decrease) in cash and cash equivalents(27,090)159,572Cash and cash equivalents at beginning of period47,208100,554Cash and cash equivalents at end of period$20,118$260,126Supplemental disclosure of cash flow information:Cash paid for interest$584$606Supplemental disclosure of non-cash investing and financing activities:Unrealized gain on investments$35$—





The accompanying notes are an integral part of these consolidated financial statements.





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Lexicon Pharmaceuticals, Inc.





Notes to Consolidated Financial Statements


(Unaudited)





1.      Basis of Presentation





The accompanying unaudited consolidated financial statements of Lexicon Pharmaceuticals, Inc. (“Lexicon” or the “Company”) have been prepared in accordance with generally accepted accounting principles for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.





In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three -month period ended March 31, 2011 are not necessarily indicative of the results that may be expected for the year ended December 31, 2011 .





The accompanying consolidated financial statements include the accounts of Lexicon and its wholly-owned subsidiaries. Intercompany transactions and balances are eliminated in consolidation.





For further information, refer to the financial statements and footnotes thereto included in Lexicon’s annual report on Form 10-K for the year ended December 31, 2010 , as filed with the SEC.





2.      Net Loss Per Share





Net loss per share is computed using the weighted average number of shares of common stock outstanding during the applicable period.  Shares associated with stock options, restricted stock units and warrants are not included because they are antidilutive.  There are no differences between basic and diluted net loss per share for all periods presented.





3.      Stock-Based Compensation





The Company recorded $1.5 million and $1.3 million of stock-based compensation expense for the three months ended March 31, 2011 and 2010 , respectively.  The Company utilized the Black-Scholes valuation model for estimating the fair value of the stock compensation granted, with the following weighted-average assumptions for options granted in the three months ended March 31, 2011 and 2010 :


Expected VolatilityRisk-free Interest RateExpected TermDividendRateMarch 31, 2011:Employees88%2.2%50%Officers and non-employee directors78%3.2%80%March 31, 2010:Employees86%2.4%50%Officers and non-employee directors80%3.3%80%





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The following is a summary of option activity under Lexicon’s stock option plans for the three months ended March 31, 2011 :





OptionsWeighted Average Exercise Price(in thousands)Outstanding at December 31, 201019,598$3.46Granted2,8791.80Exercised(108)1.47Expired(720)10.07Forfeited(186)1.77Outstanding at March 31, 201121,4633.04Exercisable at March 31, 201112,690$3.91





During the three months ended March 31, 2011, Lexicon granted its officers 200,277 shares of stock bonus awards in lieu of cash bonus awards.  The stock bonus awards had a weighted average grant date fair value of $1.81 per share and vested immediately.





During the three months ended March 31, 2011, Lexicon granted its employees restricted stock units in lieu of or in addition to the annual stock option awards.  These restricted stock units vest in four annual installments.  The following is a summary of restricted stock units activity under Lexicon’s stock option plans for the three months ended March 31, 2011 :


SharesWeighted Average Grant DateFair Value(in thousands)Outstanding at December 31, 2010——Granted2,1961.81Nonvested at March 31, 20112,196$1.81


During 2010, Lexicon granted certain employees restricted stock units with a performance condition.  The shares subject to the restricted stock units granted in 2010 vest upon the dosing of the first patient in a pivotal human clinical trial in any country, the results of which could be used to establish safety and efficacy of a pharmaceutical product discovered or developed by Lexicon as a basis for a New Drug Application.  Stock-based compensation expense for awards with performance conditions is recognized over the period from the date the performance condition is determined to be probable of occurring through the time the applicable condition is met.  The following is a summary of performance-based restricted stock units activity under Lexicon's stock option plans for the three months ended March 31, 2011 :


SharesWeighted Average Grant DateFair Value(in thousands)Outstanding at December 31, 2010361$1.90Nonvested at March 31, 2011361$1.90


4.      Recent Accounting Pronouncements





In October 2009, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2009-13, “Multiple-Deliverable Revenue Arrangements”, which amends FASB ASC Topic 605. ASU No. 2009-13 addresses how to determine whether an arrangement involving multiple deliverables contain more than one unit of accounting and how to allocate consideration to each unit of accounting in the arrangement. This pronouncement replaces all references to fair value as the measurement criteria with the term selling price and establishes a hierarchy for determining the selling price of a deliverable. The pronouncement also eliminates the use of the residual value method for determining the allocation of arrangement consideration, and requires additional disclosures. This pronouncement should be applied prospectively for revenue arrangements entered into or materially modified in fiscal years beginning on or after June 15, 2010, with early adoption permitted. Lexicon adopted this pronouncement in 2011 and there was no material impact to its consolidated results of operations and financial condition.


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In April 2010, the FASB issued ASU No. 2010-17, “Milestone Method of Revenue Recognition”, which amends FASB ASC Topic 605. ASU No. 2010-17 provides guidance on defining a milestone and determining when it may be appropriate to apply the milestone method of revenue recognition for research or development transactions. Research or development arrangements frequently include payment provisions whereby a portion or all of the consideration is contingent upon milestone events such as successful completion of phases in a study or achieving a specific result from the research or development efforts. The amendments in this ASU provide guidance on the criteria that should be met for determining whether the milestone method of revenue recognition is appropriate. ASU 2010-17 is effective for fiscal years and interim periods within those years beginning on or after June 15, 2010, with early adoption permitted. Lexicon adopted this pronouncement in 2011 and there was no material impact to its consolidated results of operations and financial condition.





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5.      Cash and Cash Equivalents and Investments





The fair value of cash and cash equivalents and investments held at March 31, 2011 and December 31, 2010 are as follows:


As of March 31, 2011Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value(in thousands)Cash and cash equivalents$20,118$—$—$20,118Securities maturing within one year:Certificates of deposit545——545U.S. treasury securities168,20743(3)168,247Total short-term investments$168,752$43$(3)$168,792Total cash and cash equivalents and investments$188,870$43$(3)$188,910As of December 31, 2010Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value(in thousands)Cash and cash equivalents$47,207$1$—$47,208Securities maturing within one year:Certificates of deposit545——545U.S. treasury securities163,35410(6)163,358Total short-term investments$163,899$10$(6)$163,903Total cash and cash equivalents and investments$211,106$11$(6)$211,111


There were no realized gains or losses for the three months ended March 31, 2011 and 2010 . The cost of securities sold is based on the specific identification method.





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6.      Fair Value Measurements





The Company uses various inputs in determining the fair value of its investments and measures these assets on a recurring basis.  Assets and liabilities recorded at fair value in the consolidated balance sheets are categorized by the level of objectivity associated with the inputs used to measure their fair value.  The following levels are directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities:





|  |                                                                    
|- | -------------------------------------------------------------------
|• | Level 1 – quoted prices in active markets for identical investments




|  |                                                                                                                                  
|- | ---------------------------------------------------------------------------------------------------------------------------------
|• | Level 2 – other significant observable inputs (including quoted prices for similar investments, market corroborated inputs, etc.)




|  |                                                                                                                                 
|- | --------------------------------------------------------------------------------------------------------------------------------
|• | Level 3 – significant unobservable inputs (including the Company’s own assumptions in determining the fair value of investments)




The inputs or methodology used for valuing securities are not necessarily an indication of the credit risk associated with investing in those securities.  The following table provides the fair value measurements of applicable Company assets and liabilities


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that are measured at fair value on a recurring basis according to the fair value levels described above as of March 31, 2011 and December 31, 2010 .





Assets and Liabilities at Fair Value as of March 31, 2011Level 1Level 2Level 3Total(in thousands)AssetsCash and cash equivalents$20,118$—$—$20,118Short-term investments168,792——168,792Total cash and cash equivalents and investments$188,910$—$—$188,910LiabilitiesOther long-term liabilities$—$—$49,325$49,325Total liabilities$—$—$49,325$49,325


Assets and Liabilities at Fair Value as of December 31, 2010Level 1Level 2Level 3Total(in thousands)AssetsCash and cash equivalents$47,208$—$—$47,208Short-term investments163,903——163,903Total cash and cash equivalents and investments$211,111$—$—$211,111LiabilitiesOther long-term liabilities$—$—$48,267$48,267Total liabilities$—$—$48,267$48,267


The Company did not have any Level 3 financial assets during the three months ended March 31, 2011 .  In 2010, Lexicon held auction rate securities and related rights that permitted Lexicon to require the investment bank that sold Lexicon the auction rate securities to purchase its auction rate securities at par value.  On June 30, 2010, Lexicon exercised the rights and the investment bank purchased Lexicon's remaining auction rate securities at par value on July 1, 2010.  The table presented below summarizes the change in consolidated balance sheet carrying value associated with these Level 3 financial assets for the three months ended March 31, 2010 .


Short-term Investments(in thousands)Balance at December 31, 2009$56,034Unrealized gains included in earnings as gain on investments, net88Net sales and settlements(2,575)Balance at March 31, 2010$53,547


The Company's Level 3 liabilities are estimated using a probability-based income approach utilizing an appropriate discount rate.  Subsequent changes in the fair value of the Symphony Icon purchase consideration liability are recorded as an increase in Symphony Icon purchase liability in the accompanying consolidated statements of operations.  The following table summarizes the change in consolidated balance sheet carrying value associated with Level 3 liabilities for the three months ended March 31, 2011 .


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Other Long-term Liabilities(in thousands)Balance at December 31, 2010$48,267Change in valuation of purchase consideration payable to former Symphony Icon stockholders1,058Balance at March 31, 2011$49,325


The Company also has assets that under certain conditions are subject to measurement at fair value on a non-recurring basis.  These assets include goodwill associated with the acquisitions of Coelacanth Corporation in 2001 and Symphony Icon on July 30, 2010 and intangible assets associated with the acquisition of Symphony Icon on July 30, 2010.  For these assets, measurement at fair value in periods subsequent to their initial recognition is applicable if one or more is determined to be impaired.





During the three months ended March 31, 2011, the Company determined that one of its buildings was impaired and therefore recorded an impairment loss of $800,000 in addition to an impairment loss of $900,000 recorded in the year ended December 31, 2010, which was recorded as research and development expense in the accompanying consolidated statement of operations.  The fair value of the impaired building was estimated using offers received from potential purchasers of the building.





7.      Debt Obligations





Mortgage Loan. In April 2004, Lexicon obtained a $34.0 million mortgage on its facilities in The Woodlands, Texas.  The mortgage loan has a ten-year term with a 20-year amortization and bears interest at a fixed rate of 8.23%.  The mortgage had a principal balance outstanding of $28.2 million as of March 31, 2011 .  The fair value of Lexicon’s mortgage loan approximates its carrying value.  The fair value of Lexicon’s mortgage loan is estimated using discounted cash flow analysis, based on the Company’s current incremental borrowing rate.





8.      Arrangements with Symphony Icon, Inc.





On June 15, 2007, Lexicon entered into a series of related agreements providing for the financing of the clinical development of certain of its drug candidates, including LX1031, LX1032 and LX1033, along with any other pharmaceutical compositions modulating the same targets as those drug candidates (the “Programs”).  The agreements included a Novated and Restated Technology License Agreement pursuant to which the Company licensed to Symphony Icon, a then wholly-owned subsidiary of Symphony Icon Holdings LLC (“Holdings”), the Company's intellectual property rights related to the Programs.  Holdings contributed $45 million to Symphony Icon in order to fund the clinical development of the Programs.


Under a Share Purchase Agreement, dated June 15, 2007, between the Company and Holdings, the Company issued and sold to Holdings 7,650,622 shares of its common stock on June 15, 2007 in exchange for $15 million and the Purchase Option (as defined below).


Under a Purchase Option Agreement, dated June 15, 2007, among the Company, Symphony Icon and Holdings, the Company received from Holdings an exclusive purchase option (the “Purchase Option”) that gave the Company the right to acquire all of the equity of Symphony Icon, thereby allowing the Company to reacquire all of the Programs.  Lexicon originally calculated the value of the Purchase Option as the difference between the fair value of the common stock issued to Holdings of $23.6 million (calculated at the time of issuance) and the $15.0 million in cash received from Holdings for the issuance of the common stock.  Lexicon recorded the value of the Purchase Option as an asset, and was amortizing this asset over the four-year option period.  Upon the adoption of a new accounting pronouncement regarding variable interest entities (formerly SFAS No. 167) on January 1, 2010, $2.3 million of structuring and legal fees originally allocated to noncontrolling interest was allocated to the value of the Purchase Option.  This resulted in a cumulative-effect adjustment to retained earnings of $1.5 million, representing the additional amortization expense that would have been recorded through December 31, 2009.  Upon the exercise of the Purchase Option on July 30, 2010 as discussed below, the remaining balance was amortized immediately.  The amortization expense of $678,000 is recorded in other expense, net in the accompanying consolidated statement of operations for the three months ended March 31, 2010.


On July 30, 2010, Lexicon entered into an Amended and Restated Purchase Option Agreement with Symphony Icon and Holdings and simultaneously exercised the Purchase Option, thereby reacquiring the Programs.  Pursuant to the amended terms of the Purchase Option, Lexicon paid Holdings $10 million and agreed to make up to $80 million in additional base and contingent payments.


The base payments will be in an amount equal to $50 million less 50% of the expenses Lexicon incurs after its exercise of the Purchase Option for the development of LX1031, LX1032, LX1033 and other pharmaceutical compositions modulating


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the same target as those drug candidates (the “LG103 Programs”), subject to certain exceptions and up to an aggregate reduction of $15 million.  The base payments are payable in Lexicon's discretion at any time before July 30, 2013.





The contingent payments will consist of 50% of any consideration Lexicon receives pursuant to any licensing transaction under which Lexicon grants a third party rights to commercialize a drug candidate from the LG103 Programs (a “Licensing Transaction”), subject to certain exceptions and up to a maximum of $30 million plus the amount of any reduction in the base payments for Lexicon's development expenses for the LG103 Programs (the “Recapture Eligible Amount”).  The contingent payments will be due if and when Lexicon receives such consideration from a Licensing Transaction.  In the event Lexicon receives regulatory approval in the United States for the marketing and sale of any product resulting from the LG103 Programs prior to entering into a Licensing Transaction for the commercialization of such product in the United States, in lieu of any contingent payment from such a Licensing Transaction, Lexicon will pay Holdings the sum of $15 million and any Recapture Eligible Amount attributable to the development of such product, reduced by up to 50% of such sum for the amount of any contingent payments paid prior to such United States regulatory approval attributable to any such Licensing Transaction outside of the United States with respect to such product.  In the event Lexicon makes any such payment upon United States regulatory approval, Lexicon will have no obligation to make subsequent contingent payments attributable to any such Licensing Transactions for the commercialization of such product outside the United States until the proceeds of such Licensing Transactions exceed 50% of the payment made as a result of such United States regulatory approval.


The base payments and the contingent payments may be paid in cash, common stock, or a combination of cash and common stock, in Lexicon's discretion, provided that at least 50% of any payment made on or prior to July 30, 2012 will be paid in common stock and no more than 50% of any payment made after such date will be paid in common stock.


Lexicon accounted for the exercise of the Purchase Option and acquisition of Symphony Icon as a business combination.  In connection with its acquisition of Symphony Icon, Lexicon paid $10.0 million in cash, and has also agreed to pay Holdings additional base and contingent payments as discussed above.  The fair value of the base and contingent consideration payments was $45.6 million at the date of acquisition and was estimated by applying a probability-based income approach utilizing an appropriate discount rate.  This estimation was based on significant inputs that are not observable in the market, referred to as Level 3 inputs.  Key assumptions include: (1) a discount rate of 14% for the base payments; (2) a discount rate of 18% for the contingent payments; and (3) a probability adjusted contingency.  Subsequent changes in the fair value of the Symphony Icon purchase consideration liability are recorded as increase in fair value of Symphony Icon purchase liability expense in the accompanying consolidated statements of operations.  During the three months ended March 31, 2011 , the fair value of the Symphony Icon purchase consideration liability increased by $1.1 million .





9.      Commitments and Contingencies





Operating Lease Obligations :  A Lexicon subsidiary leases laboratory and office space in Hopewell, New Jersey under an agreement which expires in June 2013.  The lease provides for two five-year renewal options at 95% of the fair market rent and includes escalating lease payments.  Rent expense is recognized on a straight-line basis over the original lease term.  Lexicon is the guarantor of the obligations of its subsidiary under this lease.  The maximum potential amount of future payments the Company could be required to make under this agreement is $5.9 million without taking into account the exercise of the renewal options.  The Company is required to maintain restricted investments to collateralize a standby letter of credit for this lease.  The Company had $0.4 million in restricted investments as collateral as of March 31, 2011 and December 31, 2010 .  Additionally, Lexicon leases certain equipment under operating leases.





Legal Proceedings. Lexicon is from time to time party to claims and legal proceedings that arise in the normal course of its business and that it believes will not have, individually or in the aggregate, a material adverse effect on its results of operations, financial condition or liquidity.





10.      Other Capital Stock Agreements





Common Stock: In March 2010, Lexicon completed the public offering and sale and concurrent private placement of an aggregate of 161,770,206 shares of its common stock at a price of $1.15 per share, resulting in net proceeds of $181.5 million, after deducting underwriting discounts and commissions of $4.3 million and offering expenses of $0.3 million.  Invus, L.P. and its affiliate Invus C.V., our largest stockholders, purchased 94,270,206 of these shares.  All of the net proceeds of this offering are reflected as issuance of common stock in the accompanying financial statements.





11.      Collaboration and License Agreements





Lexicon has derived substantially all of its revenues from drug discovery and development collaborations, target validation collaborations for the development and, in some cases, analysis of the physiological effects of genes altered in knockout mice,


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government grants and contracts, technology licenses, subscriptions to its databases and compound library sales.  Revenues generated from third parties under collaborative arrangements are recorded on a gross basis on the consolidated statements of operations as Lexicon is the principal participant for these transactions for the purpose of accounting for these arrangements.





Lexicon established an alliance with Organon in May 2005 to jointly discover, develop and commercialize novel biotherapeutic drugs.  Revenue recognized under this agreement was none and $0.2 million for the three months ended March 31, 2011 and 2010 , respectively.





Lexicon established an alliance with Taconic Farms in November 2005 for the marketing, distribution and licensing of certain lines of knockout mice and entered into an expanded collaboration with Taconic in July 2009.  Revenue recognized under these agreements was $0.2 million and $0.7 million for the three months ended March 31, 2011 and 2010 , respectively.





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Item 2.    Management's Discussion and Analysis of Financial Condition and Results of Operations





Overview





We are a biopharmaceutical company focused on the discovery and development of breakthrough treatments for human disease.  We have used gene knockout technologies and an integrated platform of advanced medical technologies to identify and validate, in vivo , more than 100 targets with promising profiles for drug discovery.  For targets that we believe have high pharmaceutical value, we engage in programs for the discovery and development of potential new drugs.  We have four drug candidates for which we have completed or are presently conducting Phase 2 clinical trials.  We have initiated a Phase 1 clinical trial of an additional drug candidate, have advanced three other drug candidates into preclinical development and have small molecule compounds from a number of additional drug discovery programs in various stages of preclinical research.


We are working both independently and through strategic collaborations and alliances to capitalize on our technology, drug target discoveries and drug discovery and development programs.  Consistent with this approach, we seek to retain exclusive rights to the benefits of certain of our small molecule drug programs by developing drug candidates from such programs internally and to collaborate with third parties with respect to the discovery, development and commercialization of small molecule and biotherapeutic drug candidates for other targets, particularly when the collaboration provides us with access to expertise and resources that we do not possess internally or are complementary to our own.  We have established drug discovery and development collaborations with a number of leading pharmaceutical and biotechnology companies which have enabled us to generate near-term cash while offering us the potential to retain economic participation in products our collaborators develop through the collaboration.  In addition, we have established collaborations and license agreements with other leading pharmaceutical and biotechnology companies, research institutes and academic institutions under which we received fees and, in some cases, are eligible to receive milestone and royalty payments, in return for granting access to some of our technologies and discoveries.





We derive substantially all of our revenues from drug discovery and development collaborations and other collaborations and technology licenses.  To date, we have generated a substantial portion of our revenues from a limited number of sources.





Our operating results and, in particular, our ability to generate additional revenues are dependent on many factors, including our success in establishing new collaborations and technology licenses, the success rate of our discovery and development efforts leading to opportunities for new collaborations and licenses, as well as milestone payments and royalties, the timing and willingness of collaborators to commercialize products that would result in milestone payments and royalties and their success in such efforts, and general and industry-specific economic conditions which may affect research and development expenditures.  Future revenues from our existing collaborations and technology licenses are uncertain because they depend, to a large degree, on the achievement of milestones and payment of royalties we earn from any future products developed under the collaboration.  As a result, we depend, in part, on securing new collaborations and license agreements.  Our ability to secure future revenue-generating agreements will depend upon our ability to address the needs of our potential future collaborators and licensees, and to negotiate agreements that we believe are in our long-term best interests.  We may determine, as we have with our four most advanced clinical drug candidates, that our interests are better served by retaining rights to our discoveries and advancing our therapeutic programs to a later stage, which could limit our near-term revenues.  Because of these and other factors, our operating results have fluctuated in the past and are likely to do so in the future, and we do not believe that period-to-period comparisons of our operating results are a good indication of our future performance.





Since our inception, we have incurred significant losses and, as of March 31, 2011 , we had an accumulated deficit of $703.0 million . Our losses have resulted principally from costs incurred in research and development, general and administrative costs associated with our operations, and non-cash stock-based compensation expenses associated with stock options and restricted stock granted to employees and consultants.  Research and development expenses consist primarily of salaries and related personnel costs, external research costs related to our preclinical and clinical efforts, material costs, facility costs, depreciation on property and equipment and other expenses related to our drug discovery and development programs. General and administrative expenses consist primarily of salaries and related expenses for executive and administrative personnel, professional fees and other corporate expenses including information technology, facilities costs and general legal activities.  In connection with the continued expansion of our drug discovery and development programs, we expect to continue to incur significant research and development costs. As a result, we will need to generate significantly higher revenues to achieve profitability.


Critical Accounting Policies





The preparation of financial statements in conformity with generally accepted accounting principles requires us to make judgments, estimates and assumptions in the preparation of our consolidated financial statements and accompanying notes.  Actual


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results could differ from those estimates.  We believe there have been no significant changes in our critical accounting policies as discussed in our Annual Report on Form 10-K for the year ended December 31, 2010 .





Recent Accounting Pronouncements





See Note 4, Recent Accounting Pronouncements, of the Notes to Consolidated Financial Statements, for a discussion of the impact of the new accounting standards on our consolidated financial statements.





Results of Operations





Revenues





Total revenues and dollar and percentage changes as compared to the corresponding period in the prior year are as follows (dollar amounts are presented in millions):


Three Months Ended March 31,20112010Total revenues$0.6$1.6Dollar decrease$(1.0)Percentage decrease(64)%


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|• | Collaborative research– Revenue from collaborative research decreased 69% to $0.5 million, primarily due to reduced revenues in the three months ended March 31, 2011 under our alliance with Taconic Farms.




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|• | Subscription and license fees– Revenue from subscriptions and license fees increased to $0.1 million primarily due to an increase in technology license fees.




Research and Development Expenses





Research and development expenses and dollar and percentage changes as compared to the corresponding period in the prior year are as follows (dollar amounts are presented in millions):


Three Months Ended March 31,20112010Total research and development expense$23.9$21.1Dollar increase$2.8Percentage increase13%


Research and development expenses consist primarily of salaries and other personnel-related expenses, third-party and other services, facility and equipment costs, laboratory supplies, and stock-based compensation expenses.





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|• | Personnel –Personnel costs for the three months ended March 31, 2011 increased 10% to $9.0 million, primarily due to severance costs associated with a reduction in our personnel in February 2011.  Salaries, bonuses, employee benefits, payroll taxes, recruiting and relocation costs are included in personnel costs.




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|• | Third-party and other services –Third-party and other services increased 27% to $7.5 million, primarily due to an increase in external clinical and preclinical research and development costs.




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|• | Facilities and equipment –Facilities and equipment costs increased 15% to $4.2 million primarily due to an impairment of buildings due to excess capacity.




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|• | Laboratory supplies –Laboratory supplies expense decreased 15% to $1.3 million primarily due to reductions in early-stage research activities.




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|• | Stock-based compensation– Stock-based compensation expense was $0.8 million, consistent with the prior year.




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|• | Other –Other costs increased 6% to $1.1 million.

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Increase in Fair Value of Symphony Icon Liability





The increase in fair value of the Symphony Icon purchase liability was $1.1 million for the three months ended March 31, 2011 (see Note 8, Arrangements with Symphony Icon, Inc., of the Notes to Consolidated Financial Statements, for more information).





General and Administrative Expenses





General and administrative expenses and dollar and percentage changes as compared to the corresponding period in the prior year are as follows (dollar amounts are presented in millions):


Three Months Ended March 31,20112010Total general and administrative expense$4.8$5.5Dollar decrease$(0.8)Percentage decrease(14)%


General and administrative expenses consist primarily of salaries and other personnel-related expenses, professional fees such as legal fees, facility and equipment costs, and stock-based compensation expenses.





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|• | Personnel– Personnel costs decreased 9% to $2.5 million primarily due to decreased severance costs.  Salaries, bonuses, employee benefits, payroll taxes, recruiting and relocation costs are included in personnel costs.




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|• | Professional fees– Professional fees decreased 46% to $0.7 million primarily due to decreased patent-related and other legal costs.




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|• | Facilities and equipment– Facilities and equipment costs were $0.6 million, consistent with the prior year.




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|• | Stock-based compensation– Stock-based compensation expense increased 27% to $0.6 million.




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|• | Other –Other costs were $0.4 million, consistent with the prior year.




Gain on Investments, Net, Interest Income, Interest Expense and Other Expense, Net





Gain on Investments, Net. Gain on investments was $2.2 million for the three months ended March 31, 2010, representing the increase in fair value of our student loan auction rate securities.  This gain was offset by a loss on investments of $2.2 million for the three months ended March 31, 2010, representing the decline in fair value of the rights obtained from UBS AG, the investment bank that sold us our auction rate securities.  On June 30, 2010, we exercised our rights obtained from UBS AG and UBS purchased our remaining auction rate securities at par value on July 1, 2010.





Interest Income. Interest income decreased 60% to $0.1 million in the three months ended March 31, 2011 from $0.2 million in the corresponding period in 2010 , due to lower yield on our investments.





Interest Expense .  Interest expense decreased 17% to $0.6 million in the three months ended March 31, 2011 due to decreased expense related to our previous line of credit with UBS Bank USA.





Other Expense, Net. Other expense, net decreased from $0.7 million in the three months ended March 31, 2010 to a slight income in the three months ended March 31, 2011 due to amortization of the Symphony Icon purchase asset in 2010.





Consolidated Net Loss and Consolidated Net Loss per Common Share





Consolidated Net Loss and Consolidated Net Loss per Common Share. Consolidated net loss increased to $29.6 million in the three months ended March 31, 2011 from $26.1 million in the corresponding period in 2010 .  Consolidated net loss per common share decreased to $0.09 in the three months ended March 31, 2011 from $0.13 in the corresponding period in 2010 .


Our quarterly operating results have fluctuated in the past and are likely to do so in the future, and we believe that quarter-to-quarter comparisons of our operating results are not a good indication of our future performance.


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Liquidity and Capital Resources





We have financed our operations from inception primarily through sales of common and preferred stock, contract and milestone payments to us under our drug discovery and development collaborations, target validation, database subscription and technology license agreements, government grants and contracts, and financing obtained under debt and lease arrangements.  We have also financed certain of our research and development activities under our agreements with Symphony Icon, Inc.  From our inception through March 31, 2011 , we had received net proceeds of $787.1 million from issuances of common and preferred stock.  In addition, from our inception through March 31, 2011 , we received $453.4 million in cash payments from drug discovery and development collaborations, target validation, database subscription and technology license agreements, sales of compound libraries and reagents, and government grants and contracts, of which $440.2 million had been recognized as revenues through March 31, 2011 .


As of March 31, 2011 , we had $188.9 million in cash, cash equivalents and investments.  As of December 31, 2010 , we had $211.1 million in cash, cash equivalents and investments.  We used cash of $21.5 million in operations in the three months ended March 31, 2011 . This consisted primarily of the consolidated net loss for the period of $29.6 million , partially offset by a net increase in other operating liabilities net of assets of $3.5 million , non-cash charges of $1.5 million related to stock-based compensation expense, $1.3 million related to depreciation expense, $1.1 million related to the increase in fair value of the Symphony Icon purchase liability and $0.8 million related to impairment of fixed assets.  Investing activities used cash of $5.3 million in the three months ended March 31, 2011 , primarily due to net purchases of investments of $4.9 million and purchases of property and equipment of $0.5 million .  Financing activities used cash of $0.2 million due to net repayment of debt borrowings of $0.3 million , partially offset by net proceeds from issuance of common stock of $0.2 million .


Invus Securities Purchase Agreement .  In June 2007, we entered into a securities purchase agreement with Invus, L.P., under which Invus, L.P. made an initial investment of approximately $205.5 million to purchase 50,824,986 shares of our common stock in August 2007.  Under the securities purchase agreement, as amended and supplemented, and after accounting for the $181.5 million in net proceeds from our public offering and concurrent private placement of common stock in March 2010, Invus, L.P. and its affiliate Invus C.V., which we collectively refer to as Invus, have the right to require us to initiate a pro rata rights offering to our stockholders, which would provide all stockholders with non-transferable rights to acquire shares of our common stock, in an aggregate amount of up to approximately $163.0 million.  The price per share of the rights offering would be designated by Invus in a range between $4.50 and a then-current average market price of our common stock.  All stockholders would have oversubscription rights with respect to the rights offering and Invus would be required to purchase its pro rata portion of the offering.  Invus may exercise its right to require us to conduct such a rights offering by giving us notice within a period of one year beginning on February 28, 2011, which will be extended by the number of days during such period that Invus is not permitted under the securities purchase agreement to initiate the rights offering as a result of any “blackout period” in connection with certain public offerings of our common stock.


Under the securities purchase agreement, until the later of the completion of the rights offering or the expiration of the period during which Invus may require us to initiate the rights offering, we have agreed not to issue any of our common stock for a per share price of less than $4.50 without the prior written consent of Invus, except pursuant to an employee or director stock option, incentive compensation or similar plan or to persons involved in the pharmaceutical industry in connection with simultaneous strategic transactions involving such persons in the ordinary course.  In addition, if we notify Invus of a proposed public offering for an offering above $4.50 per share during the period in which Invus may require us to initiate the rights offering, Invus will have a period of 10 business days in which to exercise its right to require us to conduct the rights offering, in which case we would be required to forego the proposed public offering and proceed with the rights offering.


In connection with the securities purchase agreement, we entered into a stockholders' agreement with Invus, L.P. under which Invus (a) has specified rights with respect to designation of directors and participation in future equity issuances by us, (b) is subject to certain standstill restrictions, as well as restrictions on transfer and the voting of the shares of common stock held by it and its affiliates, and (c), as long as Invus holds at least 15% of the total number of outstanding shares of our common stock, is entitled to certain minority protections.


Symphony Drug Development Financing Agreements. In June 2007, we entered into a series of related agreements providing for the financing of the clinical development of certain drug programs, including LX1031, LX1032 and LX1033, along with any other pharmaceutical compositions modulating the same targets as those drug candidates.  Under the financing arrangement, we licensed to Symphony Icon, Inc., a then wholly-owned subsidiary of Symphony Icon Holdings LLC, our intellectual property rights related to the programs and Holdings contributed $45 million to Symphony Icon in order to fund the clinical development of the programs.  We also issued and sold to Holdings shares of our common stock in exchange for $15 million and received an exclusive option to acquire all of the equity of Symphony Icon, thereby allowing us to reacquire the programs.


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Upon the recommendation of Symphony Icon’s development committee, which was comprised of an equal number of representatives from us and Symphony Icon, Symphony Icon’s board of directors had the right to require us to pay Symphony Icon up to $15 million for Symphony Icon’s use in the development of the programs in accordance with a specified development plan and related development budget.  Through July 2010, Symphony Icon’s board of directors requested us to pay Symphony Icon $9.3 million under the agreement, all of which was paid prior to the exercise of the purchase option in July 2010.


In July 2010, we entered into an amended and restated purchase option agreement with Symphony Icon and Holdings and simultaneously exercised our purchase option. Pursuant to the amended terms of the purchase option, we paid Holdings $10 million and agreed to make up to $80 million in additional base and contingent payments.


The base payments will be in an amount equal to $50 million, less 50% of the expenses we incur after our exercise of the purchase option for the development of LX1031, LX1032, LX1033 and other pharmaceutical compositions modulating the same target as those drug candidates, which we refer to as the “LG103 programs,” subject to certain exceptions and up to an aggregate reduction of $15 million. The base payments are payable in our discretion at any time before July 30, 2013.


The contingent payments will consist of 50% of any consideration we receive pursuant to any licensing transaction under which we grant a third party rights to commercialize a drug candidate from the LG103 programs, subject to certain exceptions and up to a maximum of $30 million plus the amount of any reduction in the base payments for our development expenses for the LG103 programs, which we refer to as the “recapture eligible amount.” The contingent payments will be due if and when we receive such consideration from such a licensing transaction. In the event we receive regulatory approval in the United States for the marketing and sale of any product resulting from the LG103 programs prior to entering into such a licensing transaction for the commercialization of such product in the United States, in lieu of any contingent payment from such a licensing transaction, we will pay Holdings the sum of $15 million and any recapture eligible amount attributable to the development of such product, reduced by up to 50% of such sum for the amount of any contingent payments paid prior to such United States regulatory approval attributable to any such licensing transaction outside of the United States with respect to such product. In the event we make any such payment upon United States regulatory approval, we will have no obligation to make subsequent contingent payments attributable to any such licensing transactions for the commercialization of such product outside the United States until the proceeds of such licensing transactions exceed 50% of the payment made as a result of such United States regulatory approval.


The base payments and the contingent payments may be paid in cash, common stock, or a combination of cash and common stock, in our discretion, provided that at least 50% of any payment made on or prior to July 30, 2012 will be paid in common stock and no more than 50% of any payment made after such date will be paid in common stock.


Facilities. In April 2004, we obtained a $34.0 million mortgage on our facilities in The Woodlands, Texas.  The mortgage loan has a ten-year term with a 20 year amortization and bears interest at a fixed rate of 8.23%.  The mortgage had a principal balance outstanding of $28.2 million as of March 31, 2011 .  In May 2002, our subsidiary Lexicon Pharmaceuticals (New Jersey), Inc. leased a 76,000 square-foot laboratory and office space in Hopewell, New Jersey.  The term of the lease extends until June 30, 2013.  The lease provides for an escalating yearly base rent payment of $1.3 million in the first year, $2.1 million in years two and three, $2.2 million in years four to six, $2.3 million in years seven to nine and $2.4 million in years ten and eleven.  We are the guarantor of the obligations of our subsidiary under the lease.


Our future capital requirements will be substantial and will depend on many factors, including our ability to obtain drug discovery and development collaborations and other collaborations and technology license agreements, the amount and timing of payments under such agreements, the level and timing of our research and development expenditures, market acceptance of our products, the resources we devote to developing and supporting our products and other factors.  Our capital requirements will also be affected by any expenditures we make in connection with license agreements and acquisitions of and investments in complementary technologies and businesses.  We expect to devote substantial capital resources to continue our research and development efforts, to expand our support and product development activities, and for other general corporate activities.  We believe that our current unrestricted cash and investment balances and cash and revenues we expect to derive from drug discovery and development collaborations, other collaborations and technology licenses and other sources will be sufficient to fund our operations for at least the next 12 months.  During or after this period, if cash generated by operations is insufficient to satisfy our liquidity requirements, we will need to sell additional equity or debt securities or obtain additional credit arrangements.  Additional financing may not be available on terms acceptable to us or at all. The sale of additional equity or convertible debt securities may result in additional dilution to our stockholders.





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Disclosure about Market Risk





We are exposed to limited market and credit risk on our cash equivalents which have maturities of three months or less at the time of purchase.  We maintain a short-term investment portfolio which consists of U.S. Treasury bills, money market accounts, and certificates of deposit that mature three to 12 months from the time of purchase, which we believe are subject to limited market and credit risk.  We currently do not hedge interest rate exposure or hold any derivative financial instruments in our investment portfolio.


We had approximately $188.9 million in cash and cash equivalents and short-term investments as of March 31, 2011 .  We believe that the working capital available to us will be sufficient to meet our cash requirements for at least the next 12 months.


We have operated primarily in the United States and substantially all sales to date have been made in U.S. dollars. Accordingly, we have not had any material exposure to foreign currency rate fluctuations.


Item 3.                 Quantitative and Qualitative Disclosures About Market Risk





See “Disclosure about Market Risk” under “Item 2. Management’s Discussion and Analysis  of Financial Condition and Results of Operations” for quantitative and qualitative disclosures about market risk.





Item 4.                 Controls and Procedures





Our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures (as defined in rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) are effective to ensure that the information required to be disclosed by us in the reports we file under the Securities Exchange Act is gathered, analyzed and disclosed with adequate timeliness, accuracy and completeness, based on an evaluation of such controls and procedures as of the end of the period covered by this report.





Subsequent to our evaluation, there were no significant changes in internal controls or other factors that could significantly affect internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses.








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Part II -- Other Information





Item 1.    Legal Proceedings





We are from time to time party to claims and legal proceedings that arise in the normal course of our business and that we believe will not have, individually or in the aggregate, a material adverse effect on our results of operations, financial condition or liquidity.





Item 1A.      Risk Factors





The following risks and uncertainties are important factors that could cause actual results or events to differ materially from those indicated by forward-looking statements.  The factors described below are not the only ones we face and additional risks and uncertainties not presently known to us or that we currently deem immaterial also may impair our business operations.


Risks Related to Our Need for Additional Financing and Our Financial Results


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|• | We will need additional capital in the future and, if it is unavailable, we will be forced to significantly curtail or cease our operations.  If it is not available on reasonable terms, we will be forced to obtain funds by entering into financing agreements on unattractive terms.




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|• | Invus, L.P. and its affiliate Invus C.V., our largest stockholders, may decline to grant their consent which is required for us to conduct additional equity offerings at prices less than $4.50 per share.  In addition, we can provide no assurance that Invus will exercise its rights to require us to initiate a pro rata rights offering in which it would be obligated to purchase its pro rata portion of the offering.




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|• | We have a history of net losses, and we expect to continue to incur net losses and may not achieve or maintain profitability.




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|• | Our operating results have been and likely will continue to fluctuate, and we believe that period-to-period comparisons of our operating results are not a good indication of our future performance.




Risks Related to Discovery and Development of Our Drug Candidates


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|• | We are an early-stage company, and have not proven our ability to successfully develop and commercialize drug candidates based on our drug target discoveries.




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|• | Clinical testing of our drug candidates in humans is an inherently risky and time-consuming process that may fail to demonstrate safety and efficacy, which could result in the delay, limitation or prevention of regulatory approval.




Risks Related to Regulatory Approval of Our Drug Candidates


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|• | Our drug candidates are subject to a lengthy and uncertain regulatory process that may not result in the necessary regulatory approvals, which could adversely affect our ability to commercialize products.




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|• | If our potential products receive regulatory approval, we or our collaborators will remain subject to extensive and rigorous ongoing regulation.




Risks Related to Commercialization of Products


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|• | The commercial success of any products that we may develop will depend upon the degree of market acceptance of our products among physicians, patients, health care payors, private health insurers and the medical community.




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|• | If we are unable to establish sales and marketing capabilities or enter into agreements with third parties to market and sell our drug candidates, we may be unable to generate product revenues.




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|• | If we are unable to obtain adequate coverage and reimbursement from third-party payors for any products that we may develop, our revenues and prospects for profitability will suffer.




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|• | Our competitors may develop products that make our products obsolete.




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|• | We may not be able to manufacture our drug candidates in commercial quantities, which would prevent us from commercializing our drug candidates.




Risks Related to Our Relationships with Third Parties


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|• | We are dependent in many ways upon our collaborations with major pharmaceutical companies.  If milestone are not achieved under our collaborations or if our collaborators' efforts fail to yield pharmaceutical products on a timely basis, our opportunities to generate revenues and earn royalties will be reduced.




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|• | Conflicts with our collaborators could jeopardize the success of our collaborative agreements and harm our product development efforts.




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|• | We rely on third parties to carry out drug development activities.




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|• | We lack the capability to manufacture materials for preclinical studies, clinical trials or commercial sales and rely on third parties to manufacture our drug candidates, which may harm or delay our product development and commercialization efforts.




Risks Related to Our Intellectual Property


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|• | If we are unable to adequately protect our intellectual property, third parties may be able to use our technology, which could adversely affect our ability to compete in the market.




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|• | We may be involved in patent litigation and other disputes regarding intellectual property rights and may require licenses from third parties for our discovery and development and planned commercialization activities.  We may not prevail in any such litigation or other dispute or be able to obtain required licenses.




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|• | We use intellectual property that we license from third parties.  If we do not comply with these licenses, we could lose our rights under them.




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|• | We have not sought patent protection outside of the United States for some of our inventions, and some of our licensed patents only provide coverage in the United States.  As a result, our international competitors could be granted foreign patent protection with respect to our discoveries.




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|• | We may be subject to damages resulting from claims that we, our employees or independent contractors have wrongfully used or disclosed alleged trade secrets of their former employers.




Risks Related to Employees, Advisors and Facilities Operations


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|• | The loss of key personnel or the inability to attract and retain additional personnel could impair our ability to expand our operations.




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|• | Our collaborations with outside scientists may be subject to restriction and change.




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|• | Because most of our operations are located at a single facility, the occurrence of a disaster could significantly disrupt our business.




Risks Related to Environmental and Product Liability


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|• | We use hazardous chemicals and radioactive and biological materials in our business.  Any claims relating to improper handling, storage or disposal of these materials could be time consuming and costly.




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|• | We may be sued for product liability.




Risks Related to Our Common Stock


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|• | Our stock price may be extremely volatile.




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|• | Invus' ownership of our common stock and its other rights under our stockholders' agreement we entered into in connection with Invus, L.P.'s $205.5 million initial investment in our common stock provide Invus with substantial influence over

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matters requiring stockholder approval, including the election of directors and approval of significant corporate transactions, as well as other corporate matters.





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|• | We may engage in future acquisitions, which may be expensive and time consuming and from which we may not realize anticipated benefits.




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|• | Future sales of our common stock may depress our stock price.




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|• | If we are unable to meet Nasdaq continued listing requirements, Nasdaq may take action to delist our common stock.




For additional discussion of the risks and uncertainties that affect our business, see “Item 1A. Risk Factors” included in our annual report on Form 10-K for the year ended December 31, 2010 as filed with the Securities and Exchange Commission.





Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds


The following table provides information about our purchases of shares of our common stock during the three months ended March 31, 2011 :


PeriodTotal Number of Shares PurchasedAverage Price Paid Per ShareTotal Number of Shares Purchased as Part of Publicly Announced Plans or ProgramsMaximum Number of Shares that May Yet be Purchased Under the Plans or Programs(3)January 1-31, 2011—$———February 1-28, 201159,825(1)$1.81(2)——March 1-31, 2011—$———





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|(1) | Represents shares retained by us at the election of recipients of stock bonus awards granted in February 2011 under our Equity Incentive Plan in satisfaction of their withholding tax obligations with respect to such stock bonus awards.

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|(2) | Represents the market price of our common stock on the date of grant of such stock bonus awards, calculated in accordance with the process for determination of fair market value under our Equity Incentive Plan.

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|(3) | In the future, we may grant additional equity securities under our Equity Incentive Plan for which the recipient's tax withholding obligations with respect to the grant or vesting of such securities may be satisfied by our retention of a portion of such securities.  Further, for any such equity securities which are subject to vesting conditions, the number of equity securities which we may retain in satisfaction of the recipient's tax withholding obligations may be dependent on the continued employment of such recipient or other performance-based conditions.  Accordingly, we cannot predict with any certainty either the total amount of equity securities or the approximate dollar value of such securities that we may purchase in future years.




Item 6.    Exhibits





Exhibit No.Description31.1—Certification of Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 200231.2—Certification of Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 200232.1—Certification of Principal Executive and Principal Financial Officers Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002








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Signatures








Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.





Lexicon Pharmaceuticals, Inc.Date:May 5, 2011By:/s/ Arthur T. SandsArthur T. Sands, M.D., Ph.D.President and Chief Executive Officer





Date:May 5, 2011By:/s/ Jeffrey L. WadeJeffrey L. WadeExecutive Vice President, Corporate Development and Chief Financial Officer





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Index to Exhibits





Exhibit No.Description31.1—Certification of Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 200231.2—Certification of Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 200232.1—Certification of Principal Executive and Principal Financial Officers Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002





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