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.