UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC  20549


                                    FORM 10-Q/A


                                   (MARK ONE)

           [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

                         SECURITIES EXCHANGE ACT OF 1934


                 For the quarterly period ended: MARCH 31, 2003

                                       OR


          [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

                         SECURITIES EXCHANGE ACT OF 1934


               For the transition period from _______ to ________

                        Commission File Number:  0-30235


                                 EXELIXIS, INC.
             (Exact name of registrant as specified in its charter)


                Delaware                                   04-3257395
     (State or other jurisdiction of                   (I.R.S.  Employer
      incorporation or organization)                 Identification  Number)

                                 170 Harbor Way
                                  P.O. Box 511
                          South San Francisco, CA 94083
          (Address of principal executive offices, including zip code)

                                 (650) 837-7000
              (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:

            Yes  [X]                                     No  [  ]


Indicate  by  check  mark  whether  the  registrant  is an accelerated filer (as
defined  in  Exchange  Act  Rule  12b-2).  Yes  [X]   No  [  ]

As  of  April  30, 2003, there were 59,872,301 shares of the registrant's common
stock  outstanding.


Explanatory Note: - ----------------- On May 5, 2003, a preliminary copy of Exelixis, Inc.'s Quarterly Report on Form 10-Q was submitted to the Securities and Exchange Commission. This complete and final Form 10-Q/A is filed with exhibits that were previously omitted. The amended filing does not include any substantive changes to, or restatements of, the financial statements included as part of the report. EXELIXIS, INC. FORM 10-Q/A INDEX PART I. FINANCIAL INFORMATION Page No. Item 1. Financial Statements Consolidated Condensed Balance Sheets March 31, 2003 and December 31, 2002 3 Consolidated Condensed Statements of Operations Three Months Ended March 31, 2003 and 2002 4 Consolidated Condensed Statements of Cash Flows Three Months Ended March 31, 2003 and 2002 5 Notes to Consolidated Condensed Financial Statements March 31, 2003 6 Item 2. Management Discussion and Analysis of Financial Condition and Results of Operations 8 Item 3. Quantitative and Qualitative Disclosures About Market Risk 14 Item 4. Controls and Procedures 15 PART II. OTHER INFORMATION Item 5. Other Information 15 Item 6. Exhibits and Reports on Form 8-K 23 SIGNATURE CERTIFICATIONS

PART I. FINANCIAL INFORMATION ITEM 1. FINANCIAL STATEMENTS EXELIXIS, INC. CONSOLIDATED CONDENSED BALANCE SHEETS (in thousands) March 31, December 31, 2003 2002 (1) ------------ ------------ ASSETS (unaudited) Current assets: Cash and cash equivalents $ 73,146 $ 84,522 Short-term investments 123,113 131,704 Other receivables 3,270 3,325 Other current assets 4,533 3,841 ------------ ------------ Total current assets 204,062 223,392 Restricted cash 7,610 5,761 Property and equipment, net 32,230 32,406 Related-party receivables 713 904 Goodwill 67,364 67,364 Other intangibles, net 4,635 4,802 Other assets 4,215 4,484 ------------ ------------ Total assets $ 320,829 $ 339,113 ============ ============ LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts payable $ 3,495 $ 4,717 Other accrued expenses 9,618 7,992 Accrued compensation and benefits 4,112 5,060 Current portion of capital lease obligations 6,894 6,840 Current portion of notes payable and bank obligations 2,205 1,840 Deferred revenue 29,696 23,790 ------------ ------------ Total current liabilities 56,020 50,239 Capital lease obligations 4,545 6,280 Notes payable and bank obligations 5,110 3,973 Convertible promissory note and loan 55,000 55,000 Other long-term liabilities 369 119 Deferred revenue 44,248 47,582 ------------ ------------ Total liabilities 165,292 163,193 ------------ ------------ Commitments Stockholders' equity: Preferred stock - - Common stock 60 59 Additional paid-in-capital 465,534 463,764 Notes receivable from stockholders (843) (1,210) Deferred stock compensation, net (648) (977) Accumulated other comprehensive income 1,846 1,638 Accumulated deficit (310,412) (287,354) ------------ ------------ Total stockholders' equity 155,537 175,920 ------------ ------------ Total liabilities and stockholders' equity $ 320,829 $ 339,113 ============ ============ (1) The consolidated condensed balance sheet at December 31, 2002 has been derived from the audited financial statement at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The accompanying notes are an integral part of these consolidated condensed financial statements.

EXELIXIS, INC. CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (in thousands, except per share data) Three Months Ended March 31, ---------------------------- 2003 2002 ----------- ----------- (unaudited) Revenues: Contract and government grants $ 9,202 $ 8,909 License 3,128 2,633 ----------- ----------- Total revenues 12,330 11,542 ----------- ----------- Operating expenses: Research and development (1) 30,303 26,190 General and administrative (2) 5,168 4,676 Amortization of intangibles 166 166 ----------- ----------- Total operating expenses 35,637 31,032 ----------- ----------- Loss from operations (23,307) (19,490) Other income (expense): Interest income 1,226 2,121 Interest expense (918) (704) Other income (expense), net 36 66 ----------- ----------- Total other income 344 1,483 ----------- ----------- Loss from continuing operations before income taxes (22,963) (18,007) Provision for income taxes (95) - ----------- ----------- Loss from continuing operations (23,058) (18,007) Loss from operations of discontinued segment - Genomica Corporation - (414) ----------- ----------- Net loss $ (23,058) $ (18,421) =========== =========== Loss per share from continuing operations $ (0.39) $ (0.32) Loss per share from discontinued operations - (0.01) ----------- ----------- Net loss per share, basic and diluted $ (0.39) $ (0.33) =========== =========== Shares used in computing basic and diluted net loss per share 59,261 55,654 =========== =========== (1) Includes stock compensation expense of $198 and $482 for the three months ended March 31, 2003 and 2002, respectively. (2) Includes stock compensation expense of $246 and $336 for the three months ended March 31, 2003 and 2002, respectively. The accompanying notes are an integral part of these consolidated condensed financial statements.

EXELIXIS, INC. CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (in thousands) Three Months Ended March 31, ---------------------------- 2003 2002 ------------ ------------ Cash flows from operating activities: (unaudited) Net loss $ (23,058) $ (18,421) Adjustments to reconcile net loss to net cash used in operating activities: Depreciation and amortization 3,964 3,250 Stock compensation expense 444 818 Amortization of intangibles 166 166 Other 95 108 Changes in assets and liabilities: Other receivables (389) 257 Other current assets (501) (758) Related-party receivables 187 25 Other assets 35 (200) Accounts payable and other accrued expenses 809 (5,611) Accrued merger and acquisition costs - (2,043) Other long-term liabilities 250 - Deferred revenue 2,569 (3,902) ------------ ------------ Net cash used in operating activities (15,429) (26,311) ------------ ------------ Cash flows from investing activities: Purchases of property and equipment (2,661) (474) Change in restricted cash (1,849) - Proceeds from maturities of short-term investments 59,440 34,558 Purchases of short-term investments (51,247) (20,327) ------------ ------------ Net cash provided by investing activities 3,683 13,757 ------------ ------------ Cash flows from financing activities: Proceeds from exercise of stock options, net of repurchases 99 64 Repayment of notes from stockholders 365 351 Principal payments on capital lease obligations (1,681) (1,511) Proceeds from bank obligations 2,034 - Principal payments on notes payable and bank obligations (539) (525) ------------ ------------ Net cash provided by (used in) financing activities 278 (1,621) ------------ ------------ Effect of foreign exchange rates on cash and cash equivalents 92 35 ------------ ------------ Net decrease in cash and cash equivalents (11,376) (14,140) Cash and cash equivalents, at beginning of period 84,522 35,584 ------------ ------------ Cash and cash equivalents, at end of period $ 73,146 $ 21,444 ============ ============ The accompanying notes are an integral part of these consolidated condensed financial statements.

EXELIXIS, INC. NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS MARCH 31, 2003 (unaudited) NOTE 1 ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization Exelixis, Inc. ("Exelixis" or the "Company") is a biotechnology company whose primary mission is to develop proprietary human therapeutics by using its integrated discovery platform to increase the speed, efficiency and quality of pharmaceutical product discovery and development. The Company uses comparative genomics and model system genetics to find new drug targets and compounds that Exelixis believes would be difficult or impossible to uncover using other experimental approaches. The Company's research is designed to identify novel genes and proteins expressed by those genes that, when changed, either decrease or increase the activity in a specific disease pathway in a therapeutically relevant manner. These genes and proteins represent either potential product targets or drugs that may treat disease or prevent disease initiation or progression. The Company's most advanced proprietary pharmaceutical program focuses on drug discovery and development of small molecules in cancer. While the Company's proprietary programs focus on drug discovery and development, Exelixis believes that its proprietary technologies are valuable to other industries whose products can be enhanced by an understanding of DNA or proteins, including the agrochemical, agricultural and diagnostic industries. Basis of Presentation The accompanying unaudited consolidated condensed financial statements have been prepared by the Company in accordance with accounting principles generally accepted in the United States for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X 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 the Company's management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement of the results for the fiscal period have been included. Operating results for the three-month period ended March 31, 2003 are not necessarily indicative of the results that may be expected for the year ending December 31, 2003, or for any future period. These financial statements and notes should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2002 included in the Company's Annual Report on Form 10-K. Net Loss Per Share Basic and diluted net loss per share are computed by dividing the net loss for the period by the weighted-average number of shares of common stock outstanding during the period, adjusted for shares that are subject to repurchase. The calculation of diluted net loss per share excludes potential common stock because their effect is antidilutive. Potential common stock consists of common stock subject to repurchase, incremental common shares issuable upon the exercise of stock options and warrants and shares issuable upon conversion of a convertible promissory note. Stock-Based Compensation The Company recognizes employee stock-based compensation under the intrinsic value method of accounting as prescribed by Accounting Principles Board Opinion 25, "Accounting for Stock Issued to Employees" and related interpretations. Accordingly, no compensation expense is recognized in the Company's financial statements for the stock options granted to employees, which had an exercise price equal to the fair value of the underlying common stock on the date of grant. The following table illustrates the effect on net income and earnings per share if the Company had applied the fair value recognition provisions of Statement of Financial Accounting Standards ("SFAS") No. 123, "Accounting for Stock-Based Compensation," as amended by SFAS No. 148, "Accounting for Stock-Based Compensation - Transition and Disclosure - an amendment of FASB Statement No. 123" (in thousands, except per share amounts): Three Months Ended March 31, ---------------------------- 2003 2002 ------------ ------------ Net loss: As reported $ (23,058) $ (18,421) Add: Stock-based employee compensation expense included in reported net loss 444 691 Deduct: Total stock-based employee compensation expense determined under fair value method for all awards (5,723) (6,222) ------------ ------------ Pro forma net loss $ (28,337) $ (23,952) ============ ============ Net loss per share (basic and diluted): As reported $ (0.39) $ (0.33) ============ ============ Pro forma $ (0.48) $ (0.43) ============ ============ Since options vest over several years and additional option grants are expected to be made in future years, the pro forma impact on the results of operations for the three months ended March 31, 2003 and 2002 is not necessarily representative of the pro forma effects on the results of operations for future periods. Reclassification Certain prior period amounts have been reclassified to conform to the current period presentation. Recent Accounting Pronouncements In January 2003, the Financial Accounting Standards Board ("FASB") issued Interpretation No. 46 ("FIN 46"), "Consolidation of Variable Interest Entities." This interpretation will require the Company to consolidate a Variable Interest Entity ("VIE") if the entity meets certain criteria and if the Company is considered the primary beneficiary of the VIE (such as a direct or indirect ability to make significant decisions of that entity or the obligation to absorb a majority of the entity's expected losses or gains). FIN 46 also requires additional disclosure of an entity's relationship with a VIE. The consolidation provisions of this interpretation are currently required for all VIEs created after January 31, 2003. For VIEs created prior to January 31, 2003, the consolidation provisions of FIN 46 are effective July 1, 2003. The Company is currently evaluating the effect that the adoption of FIN 46 will have on its financial statements. NOTE 2 COMPREHENSIVE INCOME (LOSS) Comprehensive income (loss) is comprised of net income (loss) and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized gains and losses on available-for-sale securities, unrealized gains and losses on cash flow hedges and cumulative translation adjustments. Comprehensive loss for the quarters ended March 31, 2003 and 2002 are as follows (in thousands): Three Months Ended March 31, ---------------------------- 2003 2002 ------------ ------------ Net loss $ (23,058) $ (18,421) Decrease in unrealized gains on available-for-sale securities (29) (1,257) Increase in unrealized gains on cash flow hedges 132 18 Increase (decrease) in cumulative translation adjustment 105 (50) ------------ ------------ Comprehensive loss $ (22,850) $ (19,710) ============ ============ The components of accumulated other comprehensive income are as follows (in thousands): March 31, December 31, 2003 2002 ------------ ------------ Unrealized gains on available-for-sale securities $ 877 $ 906 Unrealized gains on cash flow hedges 251 119 Cumulative translation adjustment 718 613 ------------ ------------ Accumulated other comprehensive income $ 1,846 $ 1,638 ============ ============ NOTE 3 GENOMICA CORPORATION In December 2001, in connection with the acquisition of Genomica Corporation ("Genomica"), Exelixis adopted an exit plan for Genomica. Under this exit plan, the Company terminated Genomica's entire workforce and abandoned its leased facilities in Boulder, Colorado and Sacramento, California. The estimated costs of the exit plan amounted to $2.9 million and were included as part of the liabilities assumed in the acquisition. As of December 31, 2002, the remaining recorded obligation to exit the Genomica activities was $825,000. During the quarter ended March 31, 2003, Exelixis paid approximately $107,000 in lease payments reducing the balance of the lease obligation to $718,000. As of March 31, 2003, the remaining actions to be taken under the exit plan consisted primarily of residual payments related to the lease obligation for the facility in Boulder, Colorado, which are expected to continue until the termination of the lease in 2005, unless the facility is subleased earlier. In April 2002, Exelixis transferred the Genomica software business to Visualize, Inc. ("Visualize") for future consideration of up to $2.4 million in license fees and royalty payments. Pursuant to the terms of the transaction, Visualize obtained a license with all rights and obligations to third parties currently licensing the Genomica software, including the sole right to further develop and license the software to other third parties. Royalties that Exelixis receives, if any, will be recorded in the period they are earned as a gain from discontinued operations. In addition, Visualize assumed the lease obligation for the Company's abandoned facility in Sacramento, California. Exelixis retains an internal use license for the software. As a result of this transaction, the Company reported the operating results of Genomica and the estimated loss on the sale of Genomica as discontinued operations. For the quarter ended March 31, 2002, Genomica's operating results consisted of revenues of approximately $18,000 and an operating loss of approximately $414,000. ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS The following discussion and analysis contains forward-looking statements. These statements are based on our current expectations, assumptions, estimates and projections about our business and our industry, and involve known and unknown risks, uncertainties and other factors that may cause our or our industry's results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied in, or contemplated by, the forward-looking statements. Words such as "believe," "anticipate," "expect," "intend," "plan," "will," "may," "should," "estimate," "predict," "potential," "continue" or the negative of such terms or other similar expressions, identify forward-looking statements. Our actual results and the timing of events may differ significantly from the results discussed in the forward-looking statements. Factors that might cause such a difference include, but are not limited to, those discussed in "Risk Factors" as well as those discussed elsewhere in this Quarterly Report on Form 10-Q. This discussion and analysis should be read in conjunction with our financial statements and accompanying notes included in this report and the 2002 audited financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2002. Operating results are not necessarily indicative of results that may occur in future periods. We undertake no obligation to update any forward-looking statement to reflect events after the date of this report. Overview We believe that we are a leader in the discovery and validation of high-quality novel targets for several major human diseases, and a leader in the discovery of potential new drug therapies, specifically for cancer and other proliferative diseases. Our primary mission is to develop proprietary human therapeutics by leveraging our integrated discovery platform to increase the speed, efficiency and quality of pharmaceutical product discovery and development. Through our expertise in comparative genomics and model system genetics, we are able to find new drug targets that we believe would be difficult or impossible to uncover using other experimental approaches. Our research is designed to identify novel genes and proteins expressed by those genes that, when changed, either decrease or increase the activity in a specific disease pathway in a therapeutically relevant manner. These genes and proteins represent either potential product targets or drugs that may treat disease or prevent disease initiation or progression. Our most advanced proprietary pharmaceutical program focuses on drug discovery and development of small molecules in cancer. Specifically, the remarkable evolutionary conservation of the biochemical pathways strongly supports the use of simple model systems, such as fruit flies, nematode worms, zebrafish and mice, to identify key components of critical cancer pathways that can then be targeted for drug discovery. We expect to develop new cancer drugs by exploiting the underlying "genetic liabilities" of tumor cells to provide specificity in targeting these cells for destruction, while leaving normal cells unharmed. We have discovered and are further developing a number of small molecule drug targets in addition to monoclonal antibody drug targets. Molecules directed against these targets may selectively kill cancer cells while leaving normal cells unharmed, and may provide alternatives or supplements to current cancer therapies. We believe that our proprietary technologies are also valuable to other industries whose products can be enhanced by an understanding of DNA or proteins, including the agrochemical, agricultural and diagnostic industries. Many of these industries have shorter product development cycles and lower risk than the pharmaceutical industry, while at the same time generating significant sales with attractive profit margins. By partnering with companies in multiple industries, we believe that we are able to diversify our business risk, while at the same time maximizing our future revenue stream opportunities. Our strategy is to establish collaborations with major pharmaceutical, biotechnology and agrochemical companies based on the strength of our technologies and biological expertise in order to support additional development of our proprietary products. Through these collaborations, we obtain license fees and research funding, together with the opportunity to receive milestone payments and royalties from research results and subsequent product development. In addition, many of our collaborations have been structured strategically to provide us access to technology to advance our internal programs, saving both time and money, while at the same time retaining rights to use the same information in different industries. Our collaborations with leading companies in the agrochemical industries allow us to continue to expand our internal development capabilities while providing our partners with novel targets and assays. Since we believe that agrochemical products have reduced development time and lower risk, we expect to be able to maximize our potential future revenue stream through partnering in multiple industries. We have ongoing commercial collaborations with several leading pharmaceutical, biotechnology and agrochemical companies, including: Bayer CropScience LP (formerly Aventis USA LP), Bayer Corporation, Bristol-Myers Squibb Company (two collaborations), Cytokinetics, Inc., Dow AgroSciences LLC, Elan Pharmaceuticals, Inc., Merck & Co., Inc. (two collaborations), Protein Design Labs, Inc., Renessen LLC, Scios Inc., Schering-Plough Research Institute, Inc. and SmithKlineBeecham Corporation. In addition to our commercial collaborations, we have relationships with other biotechnology companies, academic institutions and universities that provide us access to specific technology or intellectual property for the enhancement of our business. These include collaborations with leading biotechnology product developers and solutions providers, among them: Affymetrix, Inc., GeneMachines, AVI BioPharma, Inc., Silicon Genetics, Galapagos NV, Genomics Collaborative Inc., Accelrys, Inc., Akceli, Inc., Ardais Corp., Cogen BioCognetics, Inc., Impath Predictive Oncology, Inc. and Virtual Arrays, Inc. We have a history of operating losses resulting principally from costs associated with research and development activities, investment in core technologies and general and administrative functions. As a result of planned expenditures for future research and development activities, including manufacturing and development expenses for compounds in pre-clinical and clinical studies, we expect to incur additional operating losses for the foreseeable future. Recent Developments XL784 During the first quarter of 2003, we submitted our first investigational new drug (IND) application to the U.S. Food & Drug Administration ("FDA") for our proprietary small molecule anticancer compound, XL784. The target against which XL784 is directed is a cell surface protease involved in cleavage of growth factors that promote cell growth and differentiation. The target was originally discovered in our anti-angiogenesis research program, and shows both anti-angiogenic and anti-proliferative effects. In preclinical studies, XL784 is orally bioavailable and has shown good potency, pharmacologic activity and a safety profile appropriate to support Phase 1 studies. Our clinical plans include initiating Phase 1 first-in-man studies, to be conducted in healthy volunteers, while continuing to explore the therapeutic utility of the compound in various animal models of disease, including cardiovascular disease. Following recent discussions with the FDA, we currently have an active IND and are in a position to initiate the Phase 1 program as soon as practicable. The trial, designed as a dose escalation study to measure the safety, pharmacokinetics and biological activity of XL784 following oral administration, will be conducted at a single center. Based on preclinical studies, the compound appears appropriate for testing in healthy volunteers and, to date, has shown none of the toxicities associated with traditional anticancer compounds that act through a cytotoxic mechanism. A third-party manufacturer is supplying the drug product to be used in the clinical trial. Results of Operations Total Revenues Total revenues were approximately $12.3 million and $11.5 million for the three-month periods ended March 31, 2003 and 2002, respectively. The increase from 2002 to 2003 was driven primarily by revenue from our corporate collaboration with SmithKlineBeecham Corporation ("GlaxoSmithKline" or "GSK"), partially offset by the reduction in revenue from the conclusion of our Pharmacia Corporation relationship in February 2002. Research and Development Expenses Research and development expenses consist primarily of salaries and other personnel-related expenses, facilities costs, lab supplies, consulting and outsourcing expenses, licenses and depreciation of facilities and laboratory equipment. Research and development expenses were approximately $30.3 million and $26.2 million for the three-month periods ended March 31, 2003 and 2002, respectively. The increase in 2003 over 2002 resulted primarily from the following costs: - - Increased Personnel - Staffing costs in 2003 increased by approximately 6% from 2002 levels to approximately $11.4 million. The increase was primarily to support activities related to advancing our clinical and preclinical development programs, in addition to supporting our collaborative arrangements and our internal proprietary research and development efforts. Salaries, bonuses, related fringe benefits, recruiting and relocation costs are included in personnel costs. We expect these personnel costs to increase further as we continue to build our organization. - - Increased Lab Supplies - As a result of the increase in personnel, our compound collaborations and expansion of our drug discovery operations, lab supplies expense increased approximately 4% to $5.3 million during the first quarter of 2003. - - Increased Licenses and Consulting - The increase in license and consulting expenses was approximately 146% to $4.6 million during the first quarter of 2003. The increase was driven primarily by activities related to advancing our clinical and preclinical development programs. These activities included: completing regulatory toxicology testing of XL784 and successfully filing the IND application at the end of the first quarter of 2003; advancing a series of development candidates and back-up compounds into preclinical testing in anticipation of filing additional IND applications; manufacturing drug substance for those compounds to support preclinical studies; building additional infrastructure in clinical development to support an expanding clinical pipeline; and costs associated with manufacturing the rebeccamycin analogue to support initiation of registration trials later in 2003. We expect that research and development expenses will continue to increase in absolute dollar amounts in the future, as we continue to advance drug discovery and development programs, including manufacturing and clinical development efforts on our maturing pipeline of products. With respect to the rebeccamycin analogue, XL784 and our other proprietary compounds, we are currently relying on collaborators and third-party contractors to produce materials for clinical trials. We expect clinical costs will increase in the future as we enter clinical trials for XL784 and other proprietary product candidates and additional trials for our rebeccamycin analogue. We currently do not have estimates of total costs to reach the market by a particular drug candidate or in total. Our potential therapeutic products 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. In addition, clinical trials of our potential products may fail to demonstrate safety and efficacy, which could prevent or significantly delay regulatory approval. Our most advanced clinical program is the rebeccamycin analogue ("XL119"), an anticancer compound that we in-licensed from Bristol-Myers Squibb Company in 2001. The rebeccamycin analogue has completed Phase 1 testing. The Phase 2 clinical testing program, which is being conducted by the National Cancer Institute ("NCI"), is well advanced. To date, the most pronounced antitumor activity was observed in upper gastrointestinal tumors (most prominently in bile duct or hepatobiliary tumors), where several partial responses and instances of prolonged disease stabilization occurred. We anticipate initiating next development steps following discussions with the FDA. General and Administrative Expenses General and administrative expenses consist primarily of staffing costs to support our research activities, facilities costs and professional expenses, such as legal fees. General and administrative expenses were approximately $5.2 million and $4.7 million for the three-month periods ended March 31, 2003 and 2002, respectively. The increase in 2003 over 2002 of approximately 11% was driven primarily by costs associated with personnel and facilities to support expansion in our research and development operations. Stock Compensation Expense Deferred stock compensation for options granted to our employees is the difference between the fair value for financial reporting purposes of our common stock on the date such options were granted and their exercise price. Deferred stock compensation for options granted to consultants has been determined based upon estimated fair value, using the Black-Scholes option valuation model. As of March 31, 2003, we had approximately $700,000 of remaining deferred stock compensation related to stock options granted to consultants and employees. Deferred stock compensation is recorded as a component of stockholders' equity and is being amortized as stock compensation expense over the vesting periods of the options, which is generally four years. We recognized stock compensation expense of approximately $400,000 and $800,000 for the three-month periods ended March 31, 2003 and 2002, respectively. The decrease in stock compensation expense in 2003 compared to 2002 primarily resulted from the accelerated amortization method used for amortizing deferred compensation expense for accounting purposes. During April 2001, we granted approximately 545,000 supplemental stock options under our 2000 Equity Incentive Plan to certain employees (excluding officers and directors) who had stock options under the 2000 Equity Incentive Plan with exercise prices greater than $16.00 per share. The number of supplemental options granted was equal to 50% of the corresponding original grant held by each employee. The supplemental options have an exercise price of $16.00, vest monthly over a two-year period beginning April 1, 2001 and have a 27-month term. The vesting on the corresponding original stock options was suspended and will resume in April 2003 following the completion of vesting of the supplemental options. This new grant constitutes a synthetic repricing as defined in the Financial Accounting Standards Board ("FASB") Interpretation Number 44, "Accounting for Certain Transactions Involving Stock Compensation," and resulted in certain options being reported using the variable plan method of accounting for stock compensation expense until they are exercised, forfeited or expire. For the quarter ended March 31, 2003, we recorded no compensation expense compared to a reversal of $200,000 of compensation expense during the quarter ended March 31, 2002, due to a decrease in the market value of our common stock during that period. Amortization of Intangibles Intangible assets resulted from our acquisitions of Genomica Corporation, Artemis Pharmaceuticals GmbH and Agritope, Inc. (renamed Exelixis Plant Sciences). Amortization of intangibles was approximately $200,000 for both of the three-month periods ended March 31, 2003 and 2002. Other Income (Expense), Net Other income (expense), net, was approximately $300,000 in income for the three-month period ended March 31, 2003, compared to income of approximately $1.5 million for the comparable period in 2002. Other income (expense) consists primarily of interest income earned on cash, cash equivalents and short-term investments, offset by interest expense incurred on notes payable, bank obligations and capital lease obligations. The decrease in 2003 from 2002 was primarily due to an overall decline in interest rates coupled with an increase in interest expense related to notes payable and bank obligations. Discontinued Operations Loss from discontinued operations was zero and approximately $400,000 for the three-month periods ended March 31, 2003 and 2002, respectively. In April 2002, we transferred the Genomica software business to Visualize for future consideration of up to $2.4 million in license fees and royalty payments. Pursuant to the terms of the transaction, Visualize obtained a license with all rights and obligations to third parties currently licensing the Genomica software, including the sole right to further develop and license the software to other third parties. Royalties that we receive, if any, will be recorded in the period they are earned as a gain in discontinued operations. In addition, Visualize assumed the lease obligation for Genomica's abandoned facility in Sacramento, California. We retained an internal use license for the software. As a result of this transaction, we reported the operating results of Genomica as discontinued operations. For the three-month period ended March 31, 2002, Genomica's operating results included revenues of approximately $18,000 and an operating loss of approximately $400,000. Income Taxes We have incurred net losses since inception and, consequently, have not recorded any U.S. federal or state income taxes. We have recorded a tax provision of approximately $95,000 for the period ended March 31, 2003 related to income earned in our foreign operations, compared to none for the comparable period in 2002. Liquidity and Capital Resources Since inception, we have financed our operations primarily through the sale of equity, equipment lease financings and other loan facilities and payments from collaborators. Our initial public offering, completed in the second quarter of 2000, raised $124.5 million in net cash proceeds. In addition, we acquired Genomica in December 2001, including $109.6 million in cash and investments. As of March 31, 2003, we had approximately $203.9 million in cash, cash equivalents, short-term investments and restricted cash. Our operating activities used cash of approximately $15.4 million and $26.3 million for the three-month periods ended March 31, 2003 and 2002, respectively. For the three-month period ended March 31, 2003, cash used in operating activities related primarily to funding net losses and an increase in deferred revenue from our collaborators, partially offset by non-cash charges related to depreciation. For the comparable period in 2002, cash used in operating activities related primarily to funding net losses, cash payments related to our December 2001 acquisition of Genomica and a decrease in deferred revenue from our collaborators, partially offset by non-cash charges related to depreciation. Our investing activities provided cash of approximately $3.7 million and $13.8 million for the three-month periods ended March 31, 2003 and 2002, respectively. The cash provided resulted primarily from the proceeds from maturities of short-term investments, offset by purchases of short-term investments. Our financing activities provided cash of approximately $300,000 for the three-month period ended March 31, 2003 and used cash of $1.6 million for the comparable period in 2002. For the three-month period ended March 31, 2003, cash provided from financing activities resulted primarily from proceeds from bank obligations, partially offset by principal payments on capital lease obligations. For the comparable period in 2002, cash used in financing activities resulted primarily from principal payments on capital lease obligations and notes payable, partially offset by repayment of notes from stockholders and proceeds from the exercise of stock options, net of repurchases. We believe that our current cash and cash equivalents, short-term investments and funding to be received from collaborators, will be sufficient to satisfy our anticipated cash needs for at least the next two years. Changes in our operating plan as well as factors described in our "Risk Factors" elsewhere in this Quarterly Report on Form 10-Q could require us to consume available resources much sooner than we expect. It is possible that we will seek additional financing within this timeframe. We may raise additional funds through public or private financing, collaborative relationships or other arrangements. In July 2001, we filed a registration statement on Form S-3 to offer and sell up to $150.0 million of our common stock. We have no current commitments to offer or sell securities with respect to shares that may be offered or sold pursuant to that filing. We cannot assure you that additional funding, if sought, will be available or, even if available, will be available on terms favorable to us. Further, any additional equity financing may be dilutive to stockholders, and debt financing, if available, may involve restrictive covenants. Our failure to raise capital when needed may harm our business and operating results. Recent Accounting Pronouncements In January 2003, the FASB issued Interpretation No. 46 ("FIN 46"), "Consolidation of Variable Interest Entities." This interpretation will require us to consolidate a Variable Interest Entity ("VIE") if the entity meets certain criteria and if we are considered the primary beneficiary of the VIE (such as a direct or indirect ability to make significant decisions of that entity or the obligation to absorb a majority of the entity's expected losses or gains). FIN 46 also requires additional disclosure of an entity's relationship with a VIE. The consolidation provisions of this interpretation are currently required for all VIEs created after January 31, 2003. For VIEs created prior to January 31, 2003, the consolidation provisions of FIN 46 are effective July 1, 2003. We are currently evaluating the effect that the adoption of FIN 46 will have on our financial statements. Disclosures on Stock Option Plans Option Program Description Our stock option program is a broad-based, long-term retention program that is intended to attract and retain talented employees and align stockholder and employee interests. We consider our stock option program to be critical to our operation and productivity; essentially all of our employees participate. Of the options we granted in 2002, 94% went to employees other than the five most highly compensated executive officers. Options are currently granted under two stock option plans: one under which options to purchase shares of our stock are granted to non-employee directors and one under which options to purchase shares of our stock may be granted to all employees. Option vesting periods are generally four years. Our board of directors or a designated committee of our board of directors is responsible for the administration of our employee stock option plans and determines the term, exercise price and vesting terms of each option. Incentive stock options may be granted at an exercise price per share at least equal to the estimated fair value per underlying common share on the date of grant (not less than 110% of the estimated fair value in the case of holders of more than 10% of our voting stock). Options granted under the plans are exercisable when granted and generally expire ten years from the date of grant (five years for incentive stock options granted to holders of more than 10% of our voting stock).

Distribution and Dilutive Effect of Options Employee and Executive Option Grants Three Months Ended Year Ended March 31, December 31, ------------- 2003 2002 2001 ------------------ ----- ----- Net grants during the period as a % of outstanding shares 1.6% 5.1% 5.1% Grants to listed officers* during the period as % of total options granted 66.0% 5.8% 25.2% Grants to listed officers* during the period as % of outstanding shares 1.6% 0.4% 1.4% Cumulative options held by listed officers as % of total options outstanding 23.0% 17.2% 22.5% * Our chief executive officer and the four other most highly compensated executive officers for the most recently completed fiscal year are referred to as the "listed officers." During the three months ended March 31, 2003, we granted our employees options to purchase 976,236 shares of our common stock, which was net of 479,039 shares related to forfeited options. The net options granted after forfeitures represented 1.6% of our total outstanding shares of common stock, which was approximately 59.4 million as of the beginning of 2003. During the three months ended March 31, 2003, 960,000 options were granted to the listed officers. Options granted to the listed officers as a percentage of total options granted to all employees varies from year to year. The percentage of grants to listed officers as a percentage of total options granted decreased in 2002 as compared to 2001. The decrease primarily related to the listed officers receiving their 2002 annual merit grant during the first quarter of 2003 instead of the fourth quarter of 2002, which would have been consistent with the timing of prior years' annual merit grants. If the listed officers had received their annual merit grants during the fourth quarter of 2002, their grants would have comprised 20% of the total options granted in 2002. General Option Information Summary of Option Activity Weighted-Average Shares Exercise Price ----------------- ---------------- Options outstanding at December 31, 2000 4,492,835 $ 17.70 Granted 3,160,628 14.47 Exercised (204,125) 2.75 Cancelled (270,902) 19.92 ----------------- Options outstanding at December 31, 2001 7,178,436 16.63 Granted 3,879,981 11.25 Exercised (134,743) 0.77 Cancelled (868,058) 18.48 ----------------- Options outstanding at December 31, 2002 10,055,616 14.60 Granted 1,455,275 6.44 Exercised (24,561) 4.09 Cancelled (479,039) 14.17 ----------------- Options outstanding at March 31, 2003 11,007,291 13.57 =================

In-the-Money and Out-of-the-Money Option Information as of March 31, 2003 Outstanding and Exercisable -------------------------------- Weighted-Average Shares Exercise Price -------------- --------------- In-the-Money 2,289,985 $ 5.09 Out-of-the-Money (1) 8,717,306 $ 15.79 -------------- Total Options Outstanding 11,007,291 $ 13.57 ============== (1) Out-of-the-money options are those options with an exercise price above the closing price of $6.65 at March 31, 2003. Equity Compensation Plan Information (1) (2) (3) Number of securities Weighted-Average Number of securities remaining to be issued upon exercise price available for future issuance exercise of outstanding of outstanding under equity compensation options, warrants options, warrants plans (excluding securities Plan Category and rights and rights reflected in column (1)) ------------------------ ------------------------ ------------------------------ Equity compensation plans approved by shareholders 11,007,291 $ 13.57 2,756,979 Equity compensation plans not approved by shareholders - - - ------------------------ ------------------------ ------------------------------ Total 11,007,291 $ 13.57 2,756,979 ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK Our exposure to market risk for changes in interest rates relates primarily to our investment portfolio and our long-term debt. We had investments in debt securities of approximately $198.6 million and $213.8 million at March 31, 2003 and December 31, 2002, respectively. Our investments are subject to interest rate risk, and our interest income may fluctuate due to changes in U.S. interest rates. By policy, we limit our investments to money market instruments, debt securities of U.S. government agencies and debt obligations of U.S. corporations. We manage market risk by our diversification requirements, which limit the amount of our portfolio that can be invested in a single issuer. We manage credit risk by limiting our purchases to high-quality issuers. Through our money managers, we maintain risk management control systems to monitor interest rate risk. The risk management control systems use analytical techniques, including sensitivity analysis. We had long-term debt outstanding of approximately $64.7 million and $65.3 million at March 31, 2003 and December 31, 2002, respectively. Our payment commitments associated with these debt instruments are fixed during the corresponding terms and are comprised of interest payments, principal payments or a combination thereof. The fair value of our long-term debt will fluctuate with movements of interest rates, increasing in periods of declining rates of interest and declining in periods of increasing rates of interest. We have estimated the effects on our interest rate sensitive assets and liabilities based on a one percentage point hypothetical increase or decrease in interest rates as of March 31, 2003 and December 31, 2002. As of March 31, 2003, a decrease in interest rates of one percentage point would have a net adverse change in the fair value of interest rate sensitive assets and liabilities of approximately $1.4 million. As of December 31, 2002, a decrease in interest rates of one percentage point would have a net adverse change in the fair value of interest rate sensitive assets and liabilities of approximately $1.6 million. We have assumed the changes occur immediately and uniformly to each category of instrument containing interest rate risks. Significant variations in market interest rates could produce changes in the timing of repayments due to available prepayment options. The fair value of such instruments could be affected and, therefore, actual results might differ from our estimate. We are exposed to foreign currency exchange rate fluctuations related to the operations of our German subsidiaries. The revenues and expenses of our German subsidiaries are denominated in Euro. At the end of each reporting period, the revenues and expenses of these subsidiaries are translated into U.S. dollars using the average currency rate in effect for the period, and assets and liabilities are translated into U.S. dollars using the exchange rate in effect at the end of the period. Fluctuations in exchange rates, therefore, impact our financial condition and results of operations as reported in U.S. dollars. We use derivative financial instruments to reduce our exposure to foreign currency exchange rate movements on our consolidated operating results. As of March 31, 2003, we had outstanding an aggregate notional amount of $4.3 million of written foreign currency put option contracts and a notional amount of $2.2 million of purchased foreign currency call option contracts denominated in Euro. Both the put and call option contracts have an average exercise price of $1.0291 and expire no later than October 10, 2003. The fair value of these contracts at March 31, 2003 was approximately $251,000, which is reflected on the balance sheet as an asset. As of December 31, 2002, we had outstanding an aggregate notional amount of $5.8 million of written foreign currency put option contracts and a notional amount of $2.9 million of purchased foreign currency call option contracts denominated in Euro. Both the put and call option contracts have an average exercise price of $1.0289 and expire no later than October 10, 2003. The fair value of these contracts at December 31, 2002 was approximately $119,000, which is reflected on the balance sheet as an asset. Our hedging strategy is designed such that any potential losses on these instruments will be materially offset in earnings by a reduction in Euro denominated costs for our German operations. We cannot give any assurance that our hedging strategies will be effective or that transaction losses can be minimized or forecasted accurately. ITEM 4. CONTROLS AND PROCEDURES Evaluation of disclosure controls and procedures. Based on their evaluation as of a date within 90 days of the filing date of this report, our principal executive officer and principal financial officer have concluded that Exelixis' disclosure controls and procedures (as defined in Rules 13a-14(c) and 15d-14(c) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) are sufficiently effective to ensure that the information required to be disclosed by Exelixis in the reports that we file under the Exchange Act is gathered, analyzed and disclosed with adequate timeliness, accuracy and completeness. Changes in internal controls. There have been no significant changes in our internal controls or in other factors that could significantly affect these controls subsequent to the date of the evaluation referred to above, nor were there any significant deficiencies or material weaknesses in Exelixis' internal controls. Accordingly, no corrective actions were required or undertaken. Limitations on the effectiveness of controls. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues, if any, within a company have been detected. PART II. OTHER INFORMATION ITEM 5. OTHER INFORMATION Risk Factors EXELIXIS HAS A HISTORY OF NET LOSSES. WE EXPECT TO CONTINUE TO INCUR NET LOSSES, AND WE MAY NOT ACHIEVE OR MAINTAIN PROFITABILITY. We have incurred net losses each year since our inception, including a net loss of approximately $23.1 million for the quarter ended March 31, 2003. As of that date, we had an accumulated deficit of approximately $310.4 million. We expect these losses to continue and anticipate negative operating cash flow for the foreseeable future. The size of these net losses will depend, in part, on the rate of growth, if any, in our license and contract revenues and on the level of our expenses. Our research and development expenditures and general and administrative costs have exceeded our revenues to date, and we expect to spend significant additional amounts to fund research and development in order to enhance our core technologies and undertake product development. In 2001, we acquired a rebeccamycin analogue that is in Phase 2 clinical development. We anticipate initiating next development steps following discussions with the U.S. Food and Drug Administration, or FDA. Drug substance to be used in Exelixis-sponsored clinical trials has been manufactured in bulk supply by third-party suppliers. In addition, we recently filed our first IND for a proprietary compound, XL784, and plan to initiate Phase 1 safety trials in the second quarter of 2003, pending acceptance of the application by the FDA. As a result, we expect that our operating expenses will increase significantly in the near term, and consequently, we will need to generate significant additional revenues to achieve profitability. Even if we do increase our revenues and achieve profitability, we may not be able to sustain or increase profitability. WE WILL NEED ADDITIONAL CAPITAL IN THE FUTURE, WHICH MAY NOT BE AVAILABLE TO US. Our future capital requirements will be substantial and will depend on many factors, including: - payments received under collaborative agreements; - the progress and scope of our collaborative and independent research and development projects; - our need to expand our product and clinical development efforts as well as develop manufacturing and marketing capabilities to commercialize products; - the filing, prosecution and enforcement of patent claims; and - increased costs for clinical activities. We anticipate that our current cash and cash equivalents, short-term investments and funding to be received from collaborators will enable us to maintain our currently planned operations for at least the next two years. Changes to our current operating plan may require us to consume available capital resources significantly sooner than we expect. We may be unable to raise sufficient additional capital when we need it, on favorable terms or at all. If our capital resources are insufficient to meet future capital requirements, we will have to raise additional funds. The sale of equity or convertible debt securities in the future may be dilutive to our stockholders, and debt financing arrangements may require us to pledge certain assets and enter into covenants that would restrict our ability to incur further indebtedness. If we are unable to obtain adequate funds on reasonable terms, we may be required to curtail operations significantly or to obtain funds by entering into financing, supply or collaboration agreements on unattractive terms. DIFFICULTIES WE MAY ENCOUNTER MANAGING OUR GROWTH MAY DIVERT RESOURCES AND LIMIT OUR ABILITY TO SUCCESSFULLY EXPAND OUR OPERATIONS. We have experienced a period of rapid and substantial growth that has placed, and our anticipated growth in the future will continue to place, a strain on our research, administrative and operational infrastructure. As our operations expand domestically and internationally, we will need to continue to manage multiple locations and additional relationships with various collaborative partners, suppliers and other third parties. Our ability to manage our operations and growth effectively requires us to continue to improve our operational, financial and management controls, reporting systems and procedures. In addition, recent SEC rules and regulations have increased the internal control and regulatory requirements under which we operate. We may not be able to successfully implement improvements to our management information and control systems in an efficient or timely manner and may discover deficiencies in existing systems and controls. In addition, acquisitions involve the integration of different financial, internal control and management reporting systems. We may not be able to successfully integrate the administrative and operational infrastructure without significant additional improvements and investments in management systems and procedures. WE ARE DEPENDENT ON OUR COLLABORATIONS WITH MAJOR COMPANIES. IF WE ARE UNABLE TO ACHIEVE MILESTONES, DEVELOP PRODUCTS OR RENEW OR ENTER INTO NEW COLLABORATIONS, OUR REVENUES MAY DECREASE AND OUR ACTIVITIES MAY FAIL TO LEAD TO COMMERCIALIZED PRODUCTS. Substantially all of our revenues to date have been derived from collaborative research and development agreements. Revenues from research and development collaborations depend upon continuation of the collaborations, the achievement of milestones and royalties derived from future products developed from our research. If we are unable to successfully achieve milestones or our collaborators fail to develop successful products, we will not earn the revenues contemplated under such collaborative agreements. In addition, some of our collaborations are exclusive and preclude us from entering into additional collaborative arrangements with other parties in the area or field of exclusivity. We currently have collaborative research agreements with Bayer Corporation, Bristol-Myers Squibb (two agreements), SmithKlineBeecham, Protein Design Labs, Dow AgroSciences, Renessen and Bayer CropScience. Our current collaborative agreement with Bayer Corporation is scheduled to expire in 2008, after which it will automatically be extended for one-year terms unless terminated by either party upon 12-months written notice. Our agreement permits Bayer to terminate our collaborative activities prior to 2008 upon the occurrence of specified conditions, such as the failure to agree on key strategic issues after a period of years or the acquisition of Exelixis by certain specified third parties. Our agreement with Bayer is subject to termination at an earlier date if two or more of our Chief Executive Officer, Chief Scientific Officer, Agricultural Biotechnology Program Leader and Chief Informatics Officer cease to have a relationship with us within nine months of each other. Our MOA collaborative agreement with Bristol-Myers Squibb expires in September 2004. Our cancer collaborative agreement with Bristol-Myers Squibb expires in July 2004. Our recent alliance with SmithKlineBeecham is scheduled to expire in October 2008, but is subject to earlier termination at the discretion of SmithKlineBeecham starting in 2005 if Exelixis fails to meet certain diligence obligations. Research funding under our collaborative agreement with Protein Design Labs will expire in June 2003. Similarly, funding under our arrangement with Dow AgroSciences is scheduled to expire in July 2003, after which Dow AgroSciences has the option to renew on an annual basis. Our collaborative research arrangement with Bayer CropScience is scheduled to expire in September 2004. The Bayer CropScience arrangement is conducted through a limited liability company, Agrinomics, which is owned equally by Bayer CropScience and Exelixis. Bayer CropScience may surrender its interest in Agrinomics and terminate the related research collaboration prior to the scheduled expiration upon the payment of the subsequent year's funding commitment. Agrinomics is party to a recent collaborative agreement with Renessen, which expires in December 2005 but is subject to earlier termination at the discretion of Renessen prior to October 2003. If these existing agreements are not renewed or if we are unable to enter into new collaborative agreements on commercially acceptable terms, our revenues and product development efforts may be adversely affected. For example, our agreement with Pharmacia Corporation terminated by mutual agreement in February 2002, which eliminated the opportunity for us to earn approximately $9.0 million in research revenue in 2002 and 2003. Although we have entered into other collaborations that offset this loss of revenue, we may not be able to enter into a new collaborative agreement on similar or superior financial terms than those under our existing arrangements, and the timing of new collaborative agreements may have a significant effect on our ability to continue to successfully meet our corporate goals and milestones. CONFLICTS WITH OUR COLLABORATORS COULD JEOPARDIZE THE OUTCOME OF OUR COLLABORATIVE AGREEMENTS AND OUR ABILITY TO COMMERCIALIZE PRODUCTS. We are conducting proprietary research programs in specific disease, therapeutic modality and agricultural product areas that are not covered by our collaborative agreements. Our pursuit of opportunities in agricultural and pharmaceutical markets could, however, result in conflicts with our collaborators in the event that any of our collaborators take the position that our internal activities overlap with those areas that are exclusive to our collaborative agreements, and we should be precluded from such internal activities. Moreover, disagreements with our collaborators could develop over rights to our intellectual property. In addition, our collaborative agreements may have provisions that give rise to disputes regarding the rights and obligations of the parties, including the rights of collaborators with respect to our internal programs and disease area research. Any conflict with or among our collaborators could lead to the termination of our collaborative agreements, delay collaborative activities, reduce our ability to renew agreements or obtain future collaboration agreements or result in litigation or arbitration and would negatively impact our relationship with existing collaborators. We have limited or no control over the resources that our collaborators may choose to devote to our joint efforts. Our collaborators may breach or terminate their agreements with us or fail to perform their obligations thereunder. Further, our collaborators may elect not to develop products arising out of our collaborative arrangements or may fail to devote sufficient resources to the development, manufacture, marketing or sale of such products. Certain of our collaborators could also become our competitors in the future. If our collaborators develop competing products, preclude us from entering into collaborations with their competitors, fail to obtain necessary regulatory approvals, terminate their agreements with us prematurely or fail to devote sufficient resources to the development and commercialization of our products, our product development efforts could be delayed and may fail to lead to commercialized products. OUR POTENTIAL THERAPEUTIC PRODUCTS 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. The FDA must approve any drug or biologic product before it can be marketed in the U.S. Any products resulting from our research and development efforts must also be approved by the regulatory agencies of foreign governments before the product can be sold outside of the U.S. Before a new drug application or biologics license application can be filed with the FDA, the product candidate must undergo extensive clinical trials, which can take many years and may require substantial expenditures. The regulatory process also requires preclinical testing. Data obtained from preclinical and clinical activities are susceptible to varying interpretations, which could delay, limit or prevent regulatory approval. In addition, delays or rejections may be encountered based upon changes in regulatory policy for product approval during the period of product development and regulatory agency review. Completion of clinical trials may take several years or more, but the length of time generally varies substantially according to the type, complexity, novelty and intended use of a product candidate. We currently estimate that typical clinical trials are completed over the following timelines: Clinical Phase Estimated Completion Period -------------- --------------------------- Phase 1 1 Year Phase 2 1-2 Years Phase 3 2-4 Years However, the duration and the cost of clinical trials may vary significantly over the life of a project as a result of differences arising during the clinical trial protocol, including, among others, the following: - the number of patients that ultimately participate in the trial; - the duration of patient follow-up that seems appropriate in view of the results; - the number of clinical sites included in the trials; and - the length of time required to enroll suitable patient subjects. Any clinical trial may fail to produce results satisfactory to the FDA. The FDA could determine that the design of a clinical trial is inadequate to produce reliable results. Negative or inconclusive results or adverse medical events during a clinical trial could cause a clinical trial to be repeated or development of a product or clinical trial to be terminated. The clinical development and regulatory approval process is expensive and time consuming. Any failure to obtain regulatory approval could delay or prevent us from commercializing products. Our efforts to date have been primarily limited to identifying targets and developing small molecule compounds against those targets. Significant research and development efforts will be necessary before any of our products directed against such targets can be commercialized. If regulatory approval is granted to any of our products, the approval may impose limitations on the uses for which a product may be marketed. Further, even if regulatory approval is obtained, a marketed product and its manufacturer are subject to continual review, and discovery of previously unknown problems with a product or manufacturer may result in restrictions and sanctions with respect to the product, manufacturer and relevant manufacturing facility, including withdrawal of the product from the market. CLINICAL TESTING OF OUR POTENTIAL PRODUCTS MAY FAIL TO DEMONSTRATE SAFETY AND EFFICACY, WHICH COULD PREVENT OR SIGNIFICANTLY DELAY REGULATORY APPROVAL. Clinical trials are inherently risky and may reveal that our potential products are ineffective or have unacceptable toxicity or other side effects that may significantly limit the possibility of regulatory approval of the potential product. The regulatory review and approval process is extensive and uncertain and typically takes many years to complete. The FDA requires submission of extensive preclinical, clinical and manufacturing data for each indication for which approval is sought in order to assess the safety and efficacy of the potential product. In addition, the results of preliminary studies do not necessarily predict clinical or commercial success, and larger later-stage clinical trials may fail to confirm the results observed in the preliminary studies. With respect to our own proprietary compounds in development, we have established timelines for manufacturing and clinical development based on existing knowledge of the compound and industry metrics. We have limited experience in conducting clinical studies and may not be able to assure that any specified timelines with respect to the initiation or completion of clinical studies may be achieved. In July 2001, we acquired a cancer compound, a rebeccamycin analogue, currently in Phase 2 clinical studies. This compound was manufactured by Bristol-Myers Squibb, and clinical trials to date have been conducted by the National Cancer Institute, or NCI. We will have to conduct additional clinical testing in order to meet FDA requirements for regulatory approval. We have no prior experience in conducting clinical trials, and, in conjunction with the NCI, we expect to undertake further clinical development of this compound under our own IND in order to obtain regulatory approval. We are currently in discussions with the FDA regarding a registration clinical trial program. We may not be able to rapidly or effectively assume responsibility for further development of this compound or meet the requirements identified based on our discussions with the FDA. We do not know whether planned clinical trials will begin on time, will be completed on schedule, or at all, will be sufficient for registration or will result in approvable products. Our product development costs will increase if we have delays in testing or approvals or if we need to perform more or larger clinical trials than planned. If the delays are significant, our financial results and the commercial prospects for our products will be harmed, and our ability to become profitable will be delayed. WE LACK THE CAPABILITY TO MANUFACTURE COMPOUNDS FOR CLINICAL TRIALS AND WILL RELY ON THIRD PARTIES TO MANUFACTURE OUR POTENTIAL PRODUCTS, AND WE MAY BE UNABLE TO OBTAIN REQUIRED MATERIAL IN A TIMELY MANNER OR AT A QUALITY LEVEL REQUIRED TO RECEIVE REGULATORY APPROVAL. We currently do not have manufacturing capabilities or experience necessary to produce materials for clinical trials, including for our Phase 2 clinical compound, a rebeccamycin analogue. We intend to rely on collaborators and third-party contractors to produce materials necessary for preclinical and clinical testing. We will rely on selected manufacturers to deliver materials on a timely basis and to comply with applicable regulatory requirements, including the FDA's current Good Manufacturing Practices, or GMP. These manufacturers may not be able to produce material on a timely basis or manufacture material at the quality level or in the quantity required to meet our development timelines and applicable regulatory requirements. If we are unable to contract for production of sufficient quantity and quality of materials on acceptable terms, our planned clinical trials may be delayed. Delays in preclinical or clinical testing could delay the filing of our INDs and the initiation of clinical trials that we have currently planned. In addition, our outsourcing efforts with respect to manufacturing clinical supplies will result in a dependence on our suppliers to timely manufacture and deliver sufficient quantities of materials produced under GMP conditions to enable us to conduct planned clinical trials, and if possible to bring products to market in a timely manner. WE HAVE NO EXPERIENCE IN DEVELOPING, MANUFACTURING AND MARKETING PRODUCTS AND MAY BE UNABLE TO COMMERCIALIZE PROPRIETARY PRODUCTS. Initially, we relied on our collaborators to develop and commercialize products based on our research and development efforts. We have limited or no experience in using the targets that we identify to develop our own proprietary products, or developing small molecule compounds against those targets. Our recent efforts in applying our drug development capabilities to our proprietary targets in cancer are subject to significant risk and uncertainty, particularly with respect to our ability to meet currently estimated timelines and goals for completing preclinical development efforts and filing an IND for compounds developed. In order for us to commercialize products, we would need to significantly enhance our capabilities with respect to product development and establish manufacturing and marketing capabilities, either directly or through outsourcing or licensing arrangements. We may not be able to enter into such outsourcing or licensing agreements on commercially reasonable terms, or at all. SINCE OUR TECHNOLOGIES HAVE MANY POTENTIAL APPLICATIONS AND WE HAVE LIMITED RESOURCES, OUR FOCUS ON A PARTICULAR AREA MAY RESULT IN OUR FAILURE TO CAPITALIZE ON MORE PROFITABLE AREAS. We have limited financial and managerial resources. This requires us to focus on product candidates in specific industries and forego opportunities with regard to other products and industries. For example, depending on our ability to allocate resources, a decision to concentrate on a particular agricultural program may mean that we will not have resources available to apply the same technology to a pharmaceutical project. While our technologies may permit us to work in both areas, resource commitments may require trade-offs resulting in delays in the development of certain programs or research areas, which may place us at a competitive disadvantage. Our decisions impacting resource allocation may not lead to the development of viable commercial products and may divert resources from more profitable market opportunities. OUR COMPETITORS MAY DEVELOP PRODUCTS AND TECHNOLOGIES THAT MAKE OUR PRODUCTS AND TECHNOLOGIES OBSOLETE. The biotechnology industry is highly fragmented and is characterized by rapid technological change. In particular, the area of gene research is a rapidly evolving field. We face, and will continue to face, intense competition from large biotechnology and pharmaceutical companies, as well as academic research institutions, clinical reference laboratories and government agencies that are pursuing research activities similar to ours. Some of our competitors have entered into collaborations with leading companies within our target markets, including some of our existing collaborators. Our future success will depend on our ability to maintain a competitive position with respect to technological advances. Any products that are developed through our technologies will compete in highly competitive markets. Further, our competitors may be more effective at using their technologies to develop commercial products. Many of the organizations competing with us have greater capital resources, larger research and development staffs and facilities, more experience in obtaining regulatory approvals and more extensive product manufacturing and marketing capabilities. As a result, our competitors may be able to more easily develop technologies and products that would render our technologies and products, and those of our collaborators, obsolete and noncompetitive. 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. Our success will depend in part on our ability to obtain patents and maintain adequate protection of the intellectual property related to our technologies and products. The patent positions of biotechnology companies, including our patent position, are generally uncertain and involve complex legal and factual questions. We will be able to protect our intellectual property rights from unauthorized use by third parties only to the extent that our technologies are covered by valid and enforceable patents or are effectively maintained as trade secrets. The laws of some foreign countries do not protect intellectual property rights to the same extent as the laws of the U.S., and many companies have encountered significant problems in protecting and defending such rights in foreign jurisdictions. We will continue to apply for patents covering our technologies and products as and when we deem appropriate. However, these applications may be challenged or may fail to result in issued patents. Our existing patents and any future patents we obtain may not be sufficiently broad to prevent others from practicing our technologies or from developing competing products. Furthermore, others may independently develop similar or alternative technologies or design around our patents. In addition, our patents may be challenged, invalidated or fail to provide us with any competitive advantages. We rely on trade secret protection for our confidential and proprietary information. We have taken security measures to protect our proprietary information and trade secrets, but these measures may not provide adequate protection. While we seek to protect our proprietary information by entering into confidentiality agreements with employees, collaborators and consultants, we cannot assure you that our proprietary information will not be disclosed, or that we can meaningfully protect our trade secrets. In addition, our competitors may independently develop substantially equivalent proprietary information or may otherwise gain access to our trade secrets. LITIGATION OR THIRD-PARTY CLAIMS OF INTELLECTUAL PROPERTY INFRINGEMENT COULD REQUIRE US TO SPEND SUBSTANTIAL TIME AND MONEY AND ADVERSELY AFFECT OUR ABILITY TO DEVELOP AND COMMERCIALIZE PRODUCTS. Our commercial success depends in part on our ability to avoid infringing patents and proprietary rights of third parties and not breaching any licenses that we have entered into with regard to our technologies. Other parties have filed, and in the future are likely to file, patent applications covering genes and gene fragments, techniques and methodologies relating to model systems and products and technologies that we have developed or intend to develop. If patents covering technologies required by our operations are issued to others, we may have to rely on licenses from third parties, which may not be available on commercially reasonable terms, or at all. Third parties may accuse us of employing their proprietary technology without authorization. In addition, third parties may obtain patents that relate to our technologies and claim that use of such technologies infringes these patents. Regardless of their merit, such claims could require us to incur substantial costs, including the diversion of management and technical personnel, in defending ourselves against any such claims or enforcing our patents. In the event that a successful claim of infringement is brought against us, we may be required to pay damages and obtain one or more licenses from third parties. We may not be able to obtain these licenses at a reasonable cost, or at all. Defense of any lawsuit or failure to obtain any of these licenses could adversely affect our ability to develop and commercialize products. THE LOSS OF KEY PERSONNEL OR THE INABILITY TO ATTRACT AND RETAIN ADDITIONAL PERSONNEL COULD IMPAIR OUR ABILITY TO EXPAND OUR OPERATIONS. We are highly dependent on the principal members of our management and scientific staff, the loss of whose services might adversely impact the achievement of our objectives and the continuation of existing collaborations. In addition, recruiting and retaining qualified scientific and clinical personnel to perform future research and development work will be critical to our success. We do not currently have sufficient executive management and technical personnel to fully execute our business plan. There is currently a shortage of skilled executives and employees with technical expertise, and this shortage is likely to continue. As a result, competition for skilled personnel is intense, and turnover rates are high. Although we believe we will be successful in attracting and retaining qualified personnel, competition for experienced scientists from numerous companies and academic and other research institutions may limit our ability to do so. Our business operations will require additional expertise in specific industries and areas applicable to products identified and developed through our technologies. These activities will require the addition of new personnel, including management and technical personnel and the development of additional expertise by existing employees. The inability to attract such personnel or to develop this expertise could prevent us from expanding our operations in a timely manner, or at all. OUR COLLABORATIONS WITH OUTSIDE SCIENTISTS MAY BE SUBJECT TO RESTRICTION AND CHANGE. We work with scientific and clinical advisors and collaborators at academic and other institutions that assist us in our research and development efforts. These scientists and advisors are not our employees and may have other commitments that would limit their availability to us. Although our advisors and collaborators generally agree not to do competing work, if a conflict of interest between their work for us and their work for another entity arises, we may lose their services. In addition, although our advisors and collaborators sign agreements not to disclose our confidential information, it is possible that valuable proprietary knowledge may become publicly known through them. SOCIAL ISSUES MAY LIMIT THE PUBLIC ACCEPTANCE OF GENETICALLY ENGINEERED PRODUCTS, WHICH COULD REDUCE DEMAND FOR OUR PRODUCTS. Although our technology is not dependent on genetic engineering, genetic engineering plays a prominent role in our approach to product development. For example, research efforts focusing on plant traits may involve either selective breeding or modification of existing genes in the plant under study. Public attitudes may be influenced by claims that genetically engineered products are unsafe for consumption or pose a danger to the environment. Such claims may prevent our genetically engineered products from gaining public acceptance. The commercial success of our future products will depend, in part, on public acceptance of the use of genetically engineered products, including drugs and plant and animal products. The subject of genetically modified organisms has received negative publicity, which has aroused public debate. For example, certain countries in Europe are considering regulations that may ban products or require express labeling of products that contain genetic modifications or are "genetically modified." Adverse publicity has resulted in greater regulation internationally and trade restrictions on imports of genetically altered products. If similar action is taken in the U.S., genetic research and genetically engineered products could be subject to greater domestic regulation, including stricter labeling requirements. To date, our business has not been hampered by these activities. However, such publicity in the future may prevent any products resulting from our research from gaining market acceptance and reduce demand for our products. LAWS AND REGULATIONS MAY REDUCE OUR ABILITY TO SELL GENETICALLY ENGINEERED PRODUCTS THAT WE OR OUR COLLABORATORS DEVELOP IN THE FUTURE. We or our collaborators may develop genetically engineered agricultural and animal products. The field-testing, production and marketing of genetically engineered products are subject to regulation by federal, state, local and foreign governments. Regulatory agencies administering existing or future regulations or legislation may prevent us from producing and marketing genetically engineered products in a timely manner or under technically or commercially feasible conditions. In addition, regulatory action or private litigation could result in expenses, delays or other impediments to our product development programs and the commercialization of products. The FDA has released a policy statement stating that it will apply the same regulatory standards to foods developed through genetic engineering as it applies to foods developed through traditional plant breeding. Genetically engineered food products will be subject to premarket review, however, if these products raise safety questions or are deemed to be food additives. Our products may be subject to lengthy FDA reviews and unfavorable FDA determinations if they raise questions regarding safety or our products are deemed to be food additives. The FDA has also announced that it will not require genetically engineered agricultural products to be labeled as such, provided that these products are as safe and have the same nutritional characteristics as conventionally developed products. The FDA may reconsider or change its policies, and local or state authorities may enact labeling requirements, either of which could have a material adverse effect on our ability or the ability of our collaborators to develop and market products resulting from our efforts. 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. Our research and development processes involve the controlled use of hazardous materials, including chemicals and radioactive and biological materials. Our operations produce hazardous waste products. We cannot eliminate the risk of accidental contamination or discharge and any resultant injury from these materials. Federal, state and local laws and regulations govern the use, manufacture, storage, handling and disposal of hazardous materials. We may be sued for any injury or contamination that results from our use or the use by third parties of these materials, and our liability may exceed our insurance coverage and our total assets. Compliance with environmental laws and regulations may be expensive, and current or future environmental regulations may impair our research, development and production efforts. In addition, our collaborators may use hazardous materials in connection with our collaborative efforts. To our knowledge, their work is performed in accordance with applicable biosafety regulations. In the event of a lawsuit or investigation, however, we could be held responsible for any injury caused to persons or property by exposure to, or release of, these hazardous materials used by these parties. Further, we may be required to indemnify our collaborators against all damages and other liabilities arising out of our development activities or products produced in connection with these collaborations. WE EXPECT THAT OUR QUARTERLY RESULTS OF OPERATIONS WILL FLUCTUATE, AND THIS FLUCTUATION COULD CAUSE OUR STOCK PRICE TO DECLINE, CAUSING INVESTOR LOSSES. Our quarterly operating results have fluctuated in the past and are likely to fluctuate in the future. A number of factors, many of which we cannot control, could subject our operating results and stock price to volatility, including: - recognition of upfront licensing or other fees; - payments of non-refundable upfront or licensing fees to third parties; - acceptance of our technologies and platforms; - the success rate of our discovery efforts leading to milestone payments and royalties; - the introduction of new technologies or products by our competitors; - the timing and willingness of collaborators to commercialize our products; - our ability to enter into new collaborative relationships; - the termination or non-renewal of existing collaborations; - the timing and amount of expenses incurred for clinical development and manufacturing of our products; - the impairment of acquired goodwill and other assets; and - general and industry-specific economic conditions that may affect our collaborators' research and development expenditures A large portion of our expenses, including expenses for facilities, equipment and personnel, are relatively fixed in the short term. In addition, we expect operating expenses to increase significantly during the next year. Accordingly, if our revenues decline or do not grow as anticipated due to the expiration of existing contracts or our failure to obtain new contracts, our inability to meet milestones or other factors, we may not be able to correspondingly reduce our operating expenses. Failure to achieve anticipated levels of revenues could therefore significantly harm our operating results for a particular fiscal period. Due to the possibility of fluctuations in our revenues and expenses, we believe that quarter-to-quarter comparisons of our operating results are not a good indication of our future performance. As a result, in some future quarters, our operating results may not meet the expectations of stock market analysts and investors, which could result in a decline in the price of our stock. OUR STOCK PRICE MAY BE EXTREMELY VOLATILE. We believe the trading price of our common stock will remain highly volatile and may fluctuate substantially due to factors such as the following: - the announcement of new products or services by us or our competitors; - the failure of new products in clinical trials by us or our competitors; - quarterly variations in our or our competitors' results of operations; - failure to achieve operating results projected by securities analysts; - changes in earnings estimates or recommendations by securities analysts; - developments in the biotechnology industry; - acquisitions of other companies or technologies; and - general market conditions and other factors, including factors unrelated to our operating performance or the operating performance of our competitors. These factors and fluctuations, as well as general economic, political and market conditions, may materially adversely affect the market price of our common stock. In the past, following periods of volatility in the market price of a company's securities, securities class action litigation has often been instituted. A securities class action suit against us could result in substantial costs and divert management's attention and resources, which could have a material and adverse effect on our business. WE ARE EXPOSED TO RISKS ASSOCIATED WITH ACQUISITIONS. We have made, and may in the future make, acquisitions of, or significant investments in, businesses with complementary products, services and/or technologies. Acquisitions involve numerous risks, including, but not limited to: - difficulties and increased costs in connection with integration of the personnel, operations, technologies and products of acquired companies; - diversion of management's attention from other operational matters; - the potential loss of key employees of acquired companies; - the potential loss of key collaborators of the acquired companies; - lack of synergy, or the inability to realize expected synergies, resulting from the acquisition; and - acquired intangible assets becoming impaired as a result of technological advancements or worse-than-expected performance of the acquired company. Mergers and acquisitions are inherently risky, and the inability to effectively manage these risks could materially and adversely affect our business, financial condition and results of operations. IF PRODUCT LIABILITY LAWSUITS ARE SUCCESSFULLY BROUGHT AGAINST US, WE COULD FACE SUBSTANTIAL LIABILITIES THAT EXCEED OUR RESOURCES. We may be held liable if any product our collaborators or we develop causes injury or is found otherwise unsuitable during product testing, manufacturing, marketing or sale. Although we intend to obtain general liability and product liability insurance, this insurance may be prohibitively expensive, or may not fully cover our potential liabilities. Inability to obtain sufficient insurance coverage at an acceptable cost or to otherwise protect ourselves against potential product liability claims could prevent or inhibit the commercialization of products developed by our collaborators or us. OUR HEADQUARTERS FACILITIES ARE LOCATED NEAR KNOWN EARTHQUAKE FAULT ZONES, AND THE OCCURRENCE OF AN EARTHQUAKE OR OTHER CATASTROPHIC DISASTER COULD CAUSE DAMAGE TO OUR FACILITIES AND EQUIPMENT, WHICH COULD REQUIRE US TO CEASE OR CURTAIL OPERATIONS. Given our headquarters location in South San Francisco, California, our facilities are vulnerable to damage from earthquakes. We are also vulnerable worldwide to damage from other types of disasters, including fire, floods, power loss, communications failures and similar events. If any disaster were to occur, our ability to operate our business at our facilities would be seriously, or potentially completely, impaired. In addition, the unique nature of our research activities could cause significant delays in our programs and make it difficult for us to recover from a disaster. The insurance we maintain may not be adequate to cover our losses resulting from disasters or other business interruptions. Accordingly, an earthquake or other disaster could materially and adversely harm our ability to conduct business. FUTURE SALES OF OUR COMMON STOCK MAY DEPRESS OUR STOCK PRICE. If our stockholders sell substantial amounts of our common stock (including shares issued upon the exercise of outstanding options and warrants) in the public market, the market price of our common stock could fall. These sales also might make it more difficult for us to sell equity or equity-related securities in the future at a time and price that we deemed appropriate. For example, following an acquisition, a significant number of shares of our common stock held by new stockholders may become freely tradable. Similarly, shares of common stock held by existing stockholders prior to our initial public offering became freely tradable in 2000, subject in some instances to the volume and other limitations of Rule 144 of the Securities Act. Sales of these shares and other shares of common stock held by existing stockholders could cause the market price of our common stock to decline. SOME OF OUR EXISTING STOCKHOLDERS CAN EXERT CONTROL OVER US, AND THEIR INTERESTS COULD CONFLICT WITH THE BEST INTERESTS OF OUR OTHER STOCKHOLDERS. Due to their combined stock holdings, our officers, directors and principal stockholders (stockholders holding more than 5% of our common stock) acting together, may be able to exert significant influence over all matters requiring stockholder approval, including the election of directors and approval of significant corporate transactions. In addition, this concentration of ownership may delay or prevent a change in control of our company, even when a change may be in the best interests of our stockholders. In addition, the interests of these stockholders may not always coincide with our interests as a company or the interests of other stockholders. Accordingly, these stockholders could cause us to enter into transactions or agreements that you would not approve of. Available Information We maintain a site on the world wide web at www.exelixis.com; however, ---------------- information found on our website is not incorporated by reference into this report. We make available free of charge on or through our website our SEC filings, including our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission. ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K (a) Exhibits The exhibits listed on the accompanying index to exhibits are filed or incorporated by reference (as stated therein) as part of this Quarterly Report on Form 10-Q. (b) Reports on Form 8-K None. SIGNATURE 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. Date: May 5, 2003 EXELIXIS, INC. /s/ Glen Y. Sato ------------------- Glen Y. Sato Senior Vice President, Chief Financial Officer and General Counsel (Principal Financial and Accounting Officer)

CERTIFICATION I, George A. Scangos, Ph.D., Chief Executive Officer of Exelixis, Inc., certify that: 1. I have reviewed this quarterly report on Form 10-Q of Exelixis, Inc.; 2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report; 3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report; 4. The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have: a) designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared; b) evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and c) presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date; 5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function): a) all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls; and 6. The registrant's other certifying officers and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. Date: May 5, 2003 --------------------- /s/ George A. Scangos - -------------------------- George A. Scangos President and Chief Executive Officer

CERTIFICATION I, Glen Y. Sato, Chief Financial Officer of Exelixis, Inc., certify that: 1. I have reviewed this quarterly report on Form 10-Q of Exelixis, Inc.; 2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report; 3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report; 4. The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have: a) designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared; b) evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and c) presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date; 5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function): a) all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls; and 6. The registrant's other certifying officers and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. Date: May 5, 2003 ----------------------------------------- /s/ Glen Y. Sato - ---------------------------------------------- Glen Y. Sato Senior Vice President, Chief Financial Officer and General Counsel

INDEX TO EXHIBITS Exhibit Number Description of Document - ------ ------------------------- 10.41 Separation Agreement, dated as of March 17, 2003, by and between Exelixis, Inc. and Robert Myers. 99.1 Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. (1) - -------------- (1) This certification "accompanies" the Quarterly Report on Form 10-Q, as amended, to which it relates, pursuant to Section 906 of the Sarbanes Oxley Act of 2002, and is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Exelixis, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Quarterly Report on Form 10-Q), irrespective of any general incorporation language contained in such filing.

March  17,  2003


Mr. Robert M. Myers
Exelixis, Inc.
170 Harbor Way
South San Francisco, CA 94083-0511

Dear Bob:

As  we  discussed, I have received and accepted your resignation with regret.  I
understand  your  desire to spend more time with your family at this moment.  In
view  of  our  desire  to have your continued services as an employee until your
resignation  and, subsequently, as a consultant, I am writing this letter to set
forth  the substance of the agreement (the "Agreement") that Exelixis, Inc. (the
"Company")  has  reached  with  you.

     1.  Resignation.  Your  resignation  from  your employment with the Company
shall  be  effective  the earlier of March 31, 2003 or any earlier date that you
determine to terminate your employment relationship (the "Resignation Date"). On
the  Resignation  Date,  the  Company  will  pay you all accrued salary, and all
accrued  and unused vacation earned through the Resignation Date, subject to the
customary  payroll  deductions  and  required  withholdings. You are entitled to
these  payments  regardless  of whether or not you sign this Agreement. Further,
you  acknowledge that, as of the date you sign this Agreement, you have received
your  bonus  for  2002.

     2.  Transition  Period.  From  the  date  of  this  Agreement  through  the
Resignation  Date  (the  "Transition  Period")  you  will serve as the Company's
Executive  Vice  President  of  Pharmaceuticals  at your current base salary and
benefits,  except  that  no  additional  vacation  time  shall accrue during the
Transition Period. During the Transition Period, you will be expected to work at
least  50%  of  a  full-time  schedule  to  perform  your regular duties and any
transition  duties as assigned by the Company's Chief Executive Officer ("CEO");
and  the  Company  will allow you to devote reasonable time during work hours to
other activities, provided that they do not unreasonably interfere with your job
duties.  During  the  Transition  Period,  you may not accept a position with or
render  services  to  a  Competitor  with  the  Company.

     3.  Consulting.  The  Company  agrees  to retain you, and you agree to make
yourself  available  to  perform services, as a consultant to the Company, under
the  terms  specified  below.

          (a)  Consulting Period. The Company hereby engages you as a consultant
for  the  nine  (9) month period following the Resignation Date (the "Consulting
Period"),  provided that on or after the Resignation Date, you promptly sign and
return  to  the  Company  the  supplemental  release of claims, as referenced in
paragraph  16  below.

          (b)  Consulting  Services.  During the Consulting Period, you agree to
make  yourself  available,  by  telephone,  or  in person, to provide consulting
services  to  the Company as requested by the CEO of the Company up to a maximum
of  ten  (10)  days  per  month.  You  agree  to  exercise the highest degree of
professionalism and to utilize your expertise and creative talents in performing
these  services.  The  consulting  services  shall  be  performed  at a location
designated  by  the  Company  in  the  Company's  discretion.

          (c)  No  Agency  or  Employment  Relationship.  During  the Consulting
Period,  you  will  be  an  independent contractor and will not be considered an
agent  or  an  employee  of the Company; you will not have authority to make any
representation,  contract,  or commitment on behalf of the Company and shall not
purport  to  have any such authority; and you will not be entitled to any of the
benefits  which  the  Company may make available to its employees, such as group
insurance,  workers'  compensation  insurance  coverage,  profit  sharing,  or
retirement  benefits, other than continuing post-employment benefits provided by
this  Agreement  or  by  law,  such  as  COBRA  benefits.

          (d)  Consulting  Fees.  During the Consulting Period, the Company will
pay  you  consulting  fees in the amount of $30,000, each month (the "Consulting
Fees").  The  Consulting Fees will be paid on or before the fifteenth day of the
month  following the completion of each full month during the Consulting Period.

          (e)  Taxes  and  Withholding. Because you will perform your consulting
services  as  an  independent contractor, the Company will not withhold from the
Consulting  Fees  any  amount  for  taxes,  social  security  or  other  payroll
deductions.  The  Company will report your Consulting Fees on IRS Form 1099. You
acknowledge that you will be entirely responsible for payment of any taxes which
may be due with regard to the Consulting Fees, and you hereby indemnify and hold
the  Company  harmless  from  any  liability  that may be assessed by any taxing
authority  with  respect  to  the  Consulting  Fees,  with  the exception of the
employer's  share  of  social  security,  if  any.

          (f)  Protection  of Consulting Information. You agree that, during the
Consulting  Period and thereafter, you will not use or disclose any confidential
or  proprietary  information  or  materials  of  the Company which you obtain or
develop  in the course of performing consulting services for the Company, except
with  the  written permission of the Company's CEO. Any and all work product you
create  in  connection  with  your  consulting  services  will  be  the sole and
exclusive  property  of the Company. You hereby assign to the Company all right,
title,  and  interest  in  all inventions, techniques, processes, materials, and
other  intellectual  property  developed  in the course of performing consulting
services  for  the  Company.

     4.  Other Work Activities. During the Consulting Period: (i) you may engage
in  employment,  consulting or other work relationships in addition to your work
for  the  Company  other than for or on behalf of a Competitor; (ii) the Company
shall  not  require  you  to render consulting services at times and places that
unreasonably  interfere  with  your  ability  to  engage  in  other  such  work
relationships;  and (iii) you shall not, directly or indirectly, for yourself or
any  other  person  or entity, solicit, recruit, induce, or encourage any of the
Company's employees to leave their employment with the Company, nor to undertake
employment  with  a Competitor. The Company agrees that the following noncompete
provision  will  not  be  breached  by  interviewing  for  or otherwise pursuing
employment  with  a  Competitor  of the Company during the Consulting Period, so
long  as you do not provide services of any kind to the Competitor. For purposes
of  this Agreement, a Competitor shall be defined as the following companies: 1)
Celera,  2) Millenium, 3) Tularik, 4) Cytokinetics. The CEO will have discretion
to  determine  the  location  at  which  you  perform  your  services during the
Transition  Period.

     5. Health Insurance. To the extent provided by the federal COBRA law and by
the  Company's  current  group  health insurance policies, after the Resignation
Date  you  will  be eligible to continue your group health insurance benefits at
your  own  expense.  Later,  you  may be able to convert to an individual policy
through  the provider of the Company's health insurance, if you wish. As part of
this  Agreement,  if  you  timely  elect continued coverage of your group health
insurance  under the COBRA law, the Company will pay 100% of your COBRA premiums
for  coverage  for  you  and  your  dependents  through  December  31,  2003.

     6.  Stock  Options.  Under  the  terms  of your stock option agreement, the
Company's  2000 Equity Incentive Plan (the "Plan") and this Agreement, continued
vesting  of  any  unvested  stock  options  you may possess will cease as of the
Resignation Date. Your right to exercise any vested option shares, and all other
rights  and  obligations  with  respect  to your stock option(s), will be as set
forth  in  your  stock option agreement and the Plan; provided, however, that if
you  sign  the  supplemental  release  as  set  forth in paragraph 16 below, the
Company  shall extend the period during which you may exercise any vested option
shares  to  eighteen  (18)  months  following  the  Resignation  Date.

     7.  Other  Compensation  Or  Benefits.  You  acknowledge  that,  except  as
expressly  provided  in  this  Agreement,  you  will  not receive any additional
compensation,  severance, or benefits after the Resignation Date, except for any
vested  rights  you  may  have under a written group benefit plan of the Company
(e.g.,  401(k)  account).

     8.  Expense  Reimbursements. You agree that, within thirty (30) days of the
Resignation  Date,  you  will submit your final documented expense reimbursement
statement  reflecting all business expenses you incurred through the Resignation
Date,  if  any, for which you seek reimbursement. The Company will reimburse you
for  these  expenses  pursuant  to  its  regular  business  practice. Documented
expenses  incurred during the Consulting Period with the Company's authorization
will  also  be  reimbursed  pursuant to the Company's regular business practice.

     9.  Return Of Company Property. By the Resignation Date, you will return to
the  Company  all  Company  documents (and all copies thereof) and other Company
property  in  your  possession or control, including, but not limited to, files,
notes, notebooks, correspondence, memoranda, records, plans, forecasts, reports,
studies,  proposals,  agreements,  financial  information,  business development
information,  investor  relations  information, sales and marketing information,
research  and  development  information,  personnel information, specifications,
drawings,  computer-recorded  information, equipment and other tangible property
(including,  but  not  limited  to,  computers,  credit  cards,  entry  cards,
identification  badges, and keys), and any materials of any kind that contain or
embody  any  proprietary  or  confidential  information  of the Company (and all
reproductions  thereof in whole or in part). You agree to make a diligent search
to  locate  all  such  materials.

     10.  Proprietary  Information  Obligations.  Both  during  and  after  your
employment  you  will  refrain  from  any  unauthorized use or disclosure of the
Company's  proprietary or confidential information or materials. You acknowledge
and  will  comply  with  your  continuing  obligations  under  your  Proprietary
Information  and  Inventions  Agreement  (attached  as  Exhibit  B).

     11.  Confidentiality.  The  provisions  of  this  Agreement will be held in
strictest  confidence  by  you  and  the  Company  and will not be publicized or
disclosed  in  any  manner  whatsoever;  provided,  however,  that:  (a) you may
disclose  this Agreement in confidence to your immediate family; (b) the parties
may  disclose  this  Agreement  in  confidence  to  their  respective attorneys,
accountants,  auditors,  tax  preparers, and financial advisors; (c) the Company
may disclose this Agreement as necessary to fulfill standard or legally required
corporate  reporting  or  disclosure  requirements;  (d)  you  may  disclose the
existence  of  this  Agreement  to  potential employers; and (e) the parties may
disclose  this  Agreement insofar as such disclosure may be necessary to enforce
its  terms  or  as  otherwise  required  by  law.  In  particular,  and  without
limitation, you agree not to disclose the terms of this Agreement to any current
or  former  Company  employee.

     12.  Nondisparagement.  You  and  the  Company  (through  its  officers and
directors)  agree  not  to disparage the other party or its officers, directors,
employees,  shareholders, and agents, in any manner likely to be harmful to that
party  or  its  business,  business reputation, or personal reputation; provided
that  both you and the Company may respond accurately and fully to any question,
inquiry  or  request  for  information  when  required  by  legal  process.

     13.  No  Admissions.  The promises in consideration of this Agreement shall
not  be  construed  to  be an admission of any liability or obligation by either
party  to  the  other party or to any other person, and the parties make no such
admissions.

     14.  Release  Of  Claims.  In  exchange  for  the  consideration under this
Agreement  to  which you would not otherwise be entitled, and except as provided
in  this  Agreement, you hereby generally and completely release the Company and
its  predecessors,  successors,  parent, subsidiary and affiliated entities, and
their  directors, officers, employees, shareholders, partners, agents, insurers,
and assigns from any and all claims, liabilities and obligations, both known and
unknown,  arising  from  or  in  any  way  related  to events, acts, conduct, or
omissions  occurring  at  any time prior to and including the date you sign this
Agreement.  This general release includes, but is not limited to: (a) all claims
arising  from  or  in any way related to your employment with the Company or the
termination  of  that employment; (b) all claims related to your compensation or
benefits from the Company, including salary, bonuses, commissions, vacation pay,
expense  reimbursements,  severance  pay  and  benefits, fringe benefits, stock,
stock  options,  or any other ownership interests in the Company; (c) all claims
for breach of contract, wrongful termination, and breach of the implied covenant
of good faith and fair dealing; (d) all tort claims, including claims for fraud,
defamation, emotional distress, and discharge in violation of public policy; and
(e)  all  federal,  state,  and  local  statutory  claims,  including claims for
discrimination,  harassment,  retaliation,  attorneys'  fees,  or  other  claims
arising  under  the  federal  Civil Rights Act of 1964 (as amended), the federal
Americans  with Disabilities Act of 1990, and the California Fair Employment and
Housing Act (as amended). Notwithstanding the release in the preceding sentence,
you  shall not hereby surrender any right you may have to indemnification by the
Company  pursuant  to  the  by-laws  of  the  Company,  applicable  law, or your
Indemnity  Agreement  with  the  Company  dated  January  16,  2002.

     15.  Section  1542  Waiver.  In granting the release herein, which includes
claims  which  may  be  unknown to you at present, you acknowledge that you have
read and understand Section 1542 of the California Civil Code:

     A  general  release  does  not extend to claims which the creditor does not
     know or suspect to exist in his favor at the time of executing the release,
     which if known by him must have materially affected his settlement with the
     debtor.

You  hereby  expressly  waive  and relinquish all rights and benefits under that
section  and  any  law  or legal principle of similar effect in any jurisdiction
with  respect  to  the releases granted herein, including but not limited to the
release  of  unknown  and  unsuspected  claims  granted  in  this  Agreement.

     16.  Employment  References.  You  agree to direct any individual or entity
seeking  an  employment  reference  for  you from the Company to George Scangos.

     17.  Supplemental  Release. As part of this Agreement you agree to promptly
sign  and  deliver  to  the  Company  a  supplemental  release  of  claims  (the
"Supplemental  Release")  in  the form attached hereto as Exhibit A, on or after
the  Resignation  Date.

     18.  Arbitration. To ensure rapid and economical resolution of any disputes
which may arise under this Agreement, you and the Company agree that any and all
disputes or controversies of any nature whatsoever arising from or regarding the
interpretation,  performance,  enforcement  or breach of this Agreement shall be
resolved,  to  the  fullest  extent permitted by law, by confidential, final and
binding  arbitration  conducted  by Judicial Arbitration and Mediation Services,
Inc.  ("JAMS"),  before a single arbitrator, in San Francisco, California, under
the  then-applicable JAMS rules. By agreeing to this arbitration procedure, both
you  and the Company waive the right to resolve any such dispute through a trial
by  jury, judge or administrative proceeding. The parties shall bear equally the
costs  and  fees of the arbitration; however, the arbitrator, in his or her sole
discretion,  shall be authorized to determine whether and to what extent a party
is  the  prevailing  party,  and  if  so,  to  award  to  that  prevailing party
reimbursement  for  its  reasonable  attorneys'  fees, disbursements (including,
without  limitation,  expert  witness fees and expenses), and costs arising from
the  arbitration.  The  arbitrator, and not a court, shall also be authorized to
determine  whether  the  provisions  of  this  paragraph  apply  to  a  dispute,
controversy  or claim sought to be resolved in accordance with these arbitration
procedures.  Nothing  in this Agreement is intended to prevent either you or the
Company  from  obtaining  injunctive relief in court to prevent irreparable harm
pending  the  conclusion  of  any  such  arbitration.

     19.  Miscellaneous. This Agreement, including its exhibits, constitutes the
complete, final and exclusive embodiment of the entire agreement between you and
the  Company  with  regard  to  its  subject  matter. It is entered into without
reliance  on  any  promise  or representation, written or oral, other than those
expressly  contained  herein,  and  it  supersedes  any  other  such agreements,
promises,  warranties  or  representations,  written  or oral, including but not
limited  to  your  employment offer letter dated January 4, 2002. This Agreement
may not be modified or amended except in a writing signed by both you and a duly
authorized  officer of the Company. This Agreement will bind the heirs, personal
representatives,  successors  and assigns of both you and the Company, and inure
to the benefit of both you and the Company, their heirs, successors and assigns.
If any provision of this Agreement is determined to be invalid or unenforceable,
in  whole  or in part, this determination will not affect any other provision of
this  Agreement  and  the  provision  in  question  will be modified so as to be
rendered  enforceable  in  a  manner  consistent  with the intent of the parties
insofar as possible. This Agreement will be deemed to have been entered into and
will  be  construed  and  enforced  in  accordance with the laws of the State of
California  as  applied  to  contracts  made and to be performed entirely within
California.  Any  ambiguity  in  this  Agreement  shall not be construed against
either  party  as the drafter. Any waiver of a breach of this Agreement shall be
in  writing  and  shall  not be deemed to be a waiver of any prior or successive
breach.  This Agreement may be executed in counterparts and facsimile signatures
will  suffice  as  original  signatures.

If  this  Agreement  is  acceptable  to  you,  please  sign below and return the
original  to  me  by  February  21,  2003.

We wish you the very best in your future endeavors.

Sincerely,

EXELIXIS,  INC.


By:  /s/George Scangos
    ------------------------------------------
        George A. Scangos
        President and Chief Executive Officer

Exhibit A: Supplemental Release


I HAVE READ, UNDERSTAND AND AGREE FULLY TO THE FOREGOING AGREEMENT:

/s/  Bob  Myers
- --------------------------------
Robert  M.  Myers

17th  Mar  2003
- --------------------------------
Date

EXHIBIT A SUPPLEMENTAL RELEASE AGREEMENT (To be signed on or after the Resignation Date) I understand that my employment with Exelixis, Inc. Corporation (the "Company") terminated effective March 31, 2003 (the "Resignation Date"). The Company has agreed that if I choose to sign this Supplemental Release Agreement ("Release"), the Company will pay me certain benefits and engage me to perform certain consulting services pursuant to the terms of the Resignation letter agreement dated January 31, 2003 (the "Agreement"). I understand that I am not entitled to such benefits or consulting arrangement unless I sign this Release and return it to the Company. I understand that, regardless of whether I sign this Release, the Company will pay me all of my accrued salary and vacation through the Resignation Date, to which I am entitled by law. In consideration for the benefits and consulting arrangement I am receiving under the Agreement, as described therein, I hereby generally and completely release the Company and its parents, subsidiaries, successors, predecessors and affiliates, and its and their directors, officers, employees, shareholders, agents, attorneys, predecessors, insurers, affiliates and assigns, from any and all claims, liabilities and obligations, both known and unknown, that arise out of or are in any way related to events, acts, conduct, or omissions occurring at any time prior to and including the date I sign this Release. This general release includes, but is not limited to: (a) all claims arising out of or in any way related to my employment with the Company or the termination of that employment; (b) all claims related to my compensation or benefits, including salary, bonuses, commissions, vacation pay, expense reimbursements, severance pay, fringe benefits, stock, stock options, or any other ownership interests in the Company; (c) all claims for breach of contract, wrongful termination, and breach of the implied covenant of good faith and fair dealing; (d) all tort claims, including claims for fraud, defamation, emotional distress, and discharge in violation of public policy; and (e) all federal, state, and local statutory claims, including claims for discrimination, harassment, retaliation, attorneys' fees, or other claims arising under the federal Civil Rights Act of 1964 (as amended), the federal Americans with Disabilities Act of 1990 (as amended), the federal Family and Medical Leave Act, the California Family Rights Act, and the California Fair Employment and Housing Act (as amended). In releasing claims unknown to me at present, I am waiving all rights and benefits under Section 1542 of the California Civil Code, and any law or legal principle of similar effect in any jurisdiction: "A general release does not extend to claims which the creditor does not know or suspect to exist in his favor at the time of executing the release, which if known by him must have materially affected his settlement with the debtor." I accept and agree to the terms and conditions stated above: /s/ Robert M. Myers 31st March 2003 - ------------------------------------ ----------------------------------- Robert M. Myers Date

                                                                    Exhibit 99.1


                                 CERTIFICATION*

Pursuant  to  Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C.  1350, as
adopted),  George  A.  Scangos,  Chief  Executive Officer of Exelixis, Inc. (the
"Company"),  and  Glen  Y.  Sato,  Chief  Financial Officer of the Company, each
hereby  certify  that,  to  the  best  of  their  knowledge:

1.  The  Company's  Quarterly Report on Form 10-Q for the period ended March 31,
2003,  to  which  this  Certification is attached as Exhibit 99.1 (the "Periodic
Report"), fully complies with the requirements of section 13(a) or section 15(d)
of  the  Securities  Exchange  Act  of  1934;  and

2.  The  information  contained  in  the Periodic Report fairly presents, in all
material  respects,  the  financial  condition  and results of operations of the
Company.

In  Witness  Whereof,  the undersigned have set their hands hereto as of the 5th
day  of  May,  2003.

 /s/  George  A.  Scangos         /s/  Glen  Y.  Sato
 ------------------------         -------------------
 George A. Scangos                Glen  Y.  Sato
 President and Chief Executive    Senior Vice President, Chief Financial Officer
 Officer                          and General Counsel



*    This  certification  "accompanies"  the  Quarterly  Report on Form 10-Q, as
     amended, to which it relates, pursuant to Section 906 of the Sarbanes Oxley
     Act  of  2002,  and  is  not  deemed filed with the Securities and Exchange
     Commission  and  is  not to be incorporated by reference into any filing of
     Exelixis,  Inc.  under  the  Securities  Act  of  1933,  as amended, or the
     Securities  Exchange  Act of 1934, as amended (whether made before or after
     the date of the Quarterly Report on Form 10-Q), irrespective of any general
     incorporation  language  contained  in  such  filing.

     A  signed  original  of  this written statement required by Section 906 has
     been  provided to Exelixis, Inc. and will be retained by Exelixis, Inc. and
     furnished  to  the  Securities  and  Exchange  Commission or its staff upon
     request.