U.S. SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C.  20549
                         ---------------------------

                                  FORM 10-Q



(X)    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
       SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 1998

                                     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:  0-28298
                         -------


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

Delaware                                          94-3154463
- --------                                          ----------
(State or other jurisdiction of                   (IRS Employer ID Number)
incorporation or organization)

                            3031 Research Drive
                         Richmond, California  94806
                   (Address of principal executive offices)

                             (510) 222-9700
              (Registrant's telephone number including area code)

Check whether the issuer (1) filed all reports required to be filed by Section
13 or 15(d) of the Exchange Act during the past 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.
           (XX)   Yes                    (   )   No

The number of outstanding shares of the registrant's Common Stock, $0.001 par
value, was 11,418,286 as of October 30, 1998.




                           ONYX PHARMACEUTICALS, INC.

                                     INDEX





PART I:  FINANCIAL INFORMATION

                                                                                       PAGE

                                                                                    
ITEM 1.        Financial Statements

                       Condensed balance sheets - September 30, 1998 and
                        December 31, 1997                                               3

                       Condensed statements of operations - three and nine months
                        ended September 30, 1998 and 1997                               4

                       Condensed statements of cash flows - nine months ended
                        September 30, 1998 and 1997                                     5

                       Notes to condensed financial statements                          6

ITEM 2.        Management's discussion and analysis of financial
                condition and results of operations                                     7



PART II:  OTHER INFORMATION

ITEM 6.        Exhibits and Reports on Form 8-K                                         11

SIGNATURES                                                                              12


EXHIBIT INDEX                                                                           13



                                       2



                           ONYX PHARMACEUTICALS, INC.

PART I:  FINANCIAL INFORMATION

ITEM 1:  FINANCIAL STATEMENTS

                            CONDENSED BALANCE SHEETS
                         (In thousands, except share data)



                                                  September 30,      December 31,
                                                      1998               1997
                                                  -------------      ------------
                                                   (unaudited)          (Note 1)
                                                               
ASSETS
  Current assets:
    Cash and cash equivalents                       $    22,263        $   18,828
    Short-term investments                               12,608            16,644
    Other current assets                                    960             1,002
                                                  -------------      ------------
  Total current assets                                   35,831            36,474

  Property and equipment, net                             3,811             4,562
  Notes receivable from related parties                     739               812
  Other assets                                               38                10
                                                  -------------      ------------
TOTAL ASSETS                                        $    40,419    $       41,858
                                                  -------------      ------------
                                                  -------------      ------------

LIABILITIES AND STOCKHOLDERS' EQUITY
  Current liabilities:
    Accounts payable                                $     1,276    $        1,319
    Accrued liabilities                                   3,033             1,731
    Accrued clinical trials and related expenses          2,352             1,704
    Accrued compensation                                    726               496
    Deferred revenue                                      2,101             1,209
    Long-term debt, current portion                       2,199             2,130
                                                  -------------      ------------
        Total current liabilities                        11,687             8,589
  Long-term debt, noncurrent portion                      2,932             4,336
  Deferred rent                                              50               112

  Stockholders' equity:
  Preferred stock, $0.001 par value: 5,000,000      
  shares authorized, none issued and outstanding           --                -- 
  Common stock, $0.001 par value: 25,000,000 shares
  authorized, 11,418,286 and 9,850,518 shares issued
  and outstanding as of September 30, 1998 and
  December 31, 1997, respectively                            11                10
  Additional paid-in capital                             84,933            74,836
  Deferred compensation                                    (249)             (413)
  Accumulated deficit                                   (58,945)          (45,612)
                                                  -------------      ------------
        TOTAL STOCKHOLDERS' EQUITY                       25,750            28,821
                                                  -------------      ------------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY          $    40,419    $       41,858
                                                  -------------      ------------
                                                  -------------      ------------


                           See accompanying notes.


                                       3



                           ONYX PHARMACEUTICALS, INC.


                       CONDENSED STATEMENTS OF OPERATIONS
                     (In thousands, except per share amounts)
                                   (unaudited)



                                             Three Months Ended     Nine Months Ended
                                                September 30,          September 30,
                                             ------------------     ------------------
                                               1998      1997         1998      1997
                                             --------  --------     --------  --------
                                                                  
Revenue:
    Contract and other revenue               $    479  $    300     $  1,274  $    910
    Contract revenue from related parties       2,183     1,590        7,301     5,280
                                             --------  --------     --------  --------

Total revenue                                   2,662     1,890        8,575     6,190

Operating expenses:
    Research and development                    6,625     5,489       19,309    14,469
    General and administrative                  1,331     1,319        3,941     3,912
                                             --------  --------     --------  --------

Total operating expenses                        7,956     6,808       23,250    18,381
                                             --------  --------     --------  --------

Loss from operations                           (5,294)   (4,918)     (14,675)  (12,191)

Interest income, net                              408       511        1,342     1,533
                                             --------  --------     --------  --------

Net loss                                     $ (4,886) $ (4,407)    $(13,333) $(10,658)
                                             --------  --------     --------  --------
                                             --------  --------     --------  --------

Basic and diluted net loss per share         $  (0.43) $  (0.45)    $  (1.19) $  (1.10)
                                             --------  --------     --------  --------
                                             --------  --------     --------  --------

Shares used in computing basic and
diluted net loss per share                     11,372     9,816       11,243     9,678
                                             --------  --------     --------  --------
                                             --------  --------     --------  --------


                             See accompanying notes.


                                       4

                       ONYX PHARMACEUTICALS, INC.

                   CONDENSED STATEMENTS OF CASH FLOW
                             (In thousands)
                              (unaudited)



                                                             Nine Months Ended
                                                               September 30,
                                                          --------     --------
                                                            1998         1997
                                                          --------     --------
                                                                 
CASH FLOWS FROM OPERATING ACTIVITIES:

Net loss                                                  $(13,333)    $(10,658)
Adjustments to reconcile net loss to net cash used
  in operating activities:                        
  Depreciation and amortization                              1,295        1,352
  Forgiveness of notes receivable                               89           12
  Amortization of deferred compensation                        164          164
  Changes in assets and liabilities:
    Other current assets                                        42           12
    Other assets                                               (28)         (48)
    Accounts payable                                           (43)        (150)
    Accrued clinical trials and related expenses               648          867
    Accrued liabilities                                      1,267          883
    Accrued compensation                                       230          192
    Deferred revenue                                           892          538
    Deferred rent                                              (62)        (140)
                                                          --------     --------
Net cash used in operating activities                       (8,839)      (6,976)
                                                          --------     --------
CASH FLOWS FROM INVESTING ACTIVITIES:

Purchases of short-term investments                        (11,308)     (30,631)
Sales and maturities of short-term investments              15,344       12,444
Capital expenditures                                          (544)      (1,549)
Notes receivable from related parties                          (16)        (482)
Proceeds from sale of fixed assets                              35          -
                                                          --------     --------
Net cash provided by (used in) investing activities          3,511      (20,218)
                                                          --------     --------
CASH FLOWS FROM FINANCING ACTIVITIES:

Payments on long-term debt                                  (1,335)        (335)
Net proceeds from issuance of common stock                  10,098        3,581
                                                          --------     --------
Net cash provided by financing activities                    8,763        3,246
                                                          --------     --------
Net increase (decrease) in cash and cash equivalents         3,435      (23,948)

Cash and cash equivalents at beginning of the period        18,828       36,258
                                                          --------     --------
Cash and cash equivalents at end of the period            $ 22,263     $ 12,310
                                                          --------     --------
                                                          --------     --------

                            See accompanying notes.

                                       5


                       ONYX PHARMACEUTICALS, INC.

                NOTES TO CONDENSED FINANCIAL STATEMENTS
                          SEPTEMBER 30, 1998
                             (UNAUDITED)

NOTE 1. BASIS OF PRESENTATION

The accompanying unaudited condensed financial statements have been prepared 
in accordance with generally accepted accounting principles for interim 
financial information and with the instructions to Form 10-Q. Accordingly, 
they do not include all of the information and footnotes required by 
generally accepted accounting principles for complete financial statements. 
In the opinion of management, all adjustments (consisting of normal recurring 
accruals) considered necessary for a fair presentation have been included.

Operating results for the three and nine months ended September 30, 1998 are 
not necessarily indicative of the results that may be expected for the year 
ending December 31, 1998. For further information, refer to the financial 
statements and footnotes thereto for the year ended December 31, 1997 
included in the Onyx Pharmaceuticals, Inc. (the "Company" or "Onyx") 
Annual Report on Form 10-K.

NOTE 2. NEW ACCOUNTING STANDARDS

As of January 1, 1998, the Company adopted Financial Accounting Standards 
Board Statement 130 ("SFAS 130"), "Reporting Comprehensive Income."  SFAS 
130 establishes new rules for the reporting and display of comprehensive 
income and its components; however, the adoption of SFAS 130 had no impact on 
the Company's net loss or stockholders' equity. SFAS 130 requires unrealized 
gains or losses on the Company's available-for-sale securities, which prior 
to adoption were reported separately in stockholders' equity, to be included 
in other comprehensive income.

During the quarter and nine months ended September 30, 1998 and 1997, total 
comprehensive income approximates net loss.

                                       6


                       ONYX PHARMACEUTICALS, INC.

                 MANAGEMENT'S DISCUSSION AND ANALYSIS
           OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS


EXCEPT FOR THE HISTORICAL INFORMATION CONTAINED HEREIN, THIS OVERVIEW AND THE 
FOLLOWING DISCUSSION CONTAIN FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS 
AND UNCERTAINTIES. THE COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY FROM 
THOSE DISCUSSED HERE. FACTORS THAT COULD CAUSE OR CONTRIBUTE TO SUCH 
DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED IN THE ANNUAL 
REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1997.

OVERVIEW

Since its inception, Onyx Pharmaceuticals, Inc. (the "Company" or "Onyx") 
has been engaged in the discovery and development of novel therapeutics 
including both small molecule drugs and therapeutic viruses which are based 
upon the genetics of human disease. The Company has initially chosen to focus 
its research in the area of cancer. The Company intends to pursue its 
therapeutic discovery programs independently and in collaboration with 
pharmaceutical companies, and to collaborate with such companies on the 
development and commercialization of any products which may result from the 
Company's discovery programs. The Company has entered into collaborative 
agreements with Bayer Corporation ("Bayer") in the area of ras oncogenes and 
Eli Lilly and Company ("Eli Lilly") on the function of the BRCA1 gene in 
breast cancer. The Company has also entered into two separate collaborative 
agreements with Warner-Lambert Company ("Warner-Lambert"), one in cell cycle 
mutations in cancer and a second pertaining to inflammation and autoimmunity.

The Company has not been profitable since inception and expects to incur 
substantial and increasing losses for the foreseeable future, primarily due 
to the expansion of its research and development programs, including 
preclinical studies and clinical trials to develop ONYX-015, the lead product 
in the Company's p53 therapeutic virus program. The Company expects that 
losses will fluctuate from quarter to quarter and that such fluctuations may 
be substantial. As of September 30, 1998, the Company's accumulated deficit 
was approximately $58.9 million.

The Company's business is subject to significant risks, including the risks
inherent in its research and development efforts, the results of the ONYX-015
clinical trials, uncertainties associated with obtaining and enforcing patents,
the lengthy and expensive regulatory approval process and competition from other
products. The Company does not expect to generate revenues from the sale of
proposed products in the foreseeable future.

A strategic decision has been made to focus the Company's resources on those 
programs that offer the most immediate potential for clinical and commercial 
development. As a result of this decision, the Company's mouse genomics 
research program will be phased out during the fourth quarter. This program 
represents leading-edge, early-stage technology that will require significant 
funding over the next several years in order to realize a product development 
opportunity. As a result, the program is not within the current strategic 
focus of the Company.

The mouse genomics effort was developed and has been led by Dr. Allan 
Balmain, Ph.D., F.R.S.E., Vice President of Research. Dr. Balmain has made 
the decision to leave Onyx to accept a position at the University of 
California San Francisco Cancer Research Center ("UCSF"). Onyx's mouse 
genomics group, including six scientists and researchers, will transfer to 
UCSF under Dr. Balmain's direction. Onyx will retain rights to initial 
product opportunities from this program, and Dr. Balmain will maintain a 
relationship with Onyx as a consultant and as a member of the Scientific 
Advisory Board.

                                       7


                       ONYX PHARMACEUTICALS, INC.

RESULTS OF OPERATIONS

THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1998 AND 1997

REVENUES

The Company's revenues increased 41% to $2,662,000 and 39% to $8,575,000 for 
the three and nine months ended September 30, 1998, respectively, as compared 
to the same periods in 1997. Revenues for the 1997 periods were $1,890,000 
and $6,190,000 respectively. Revenues for the three and nine months ended 
September 30, 1998 and 1997 were primarily attributable to amounts earned for 
research performed under the Company's collaborations with Bayer, 
Warner-Lambert and Eli Lilly. The increase in revenues for the three and nine 
months ended September 30, 1998 as compared to the same periods in 1997 is 
primarily due to the collaborative agreement with Warner-Lambert for the 
inflammation program which was effective as of July 31, 1997.

RESEARCH AND DEVELOPMENT EXPENSES

Research and development expenses increased 21% to $6,625,000 and 33% to 
$19,309,000 for the three and nine months ended September 30, 1998, 
respectively, as compared to the same periods in 1997. The increase was 
primarily due to additional clinical costs associated with Phase I and Phase 
II clinical trials of ONYX-015. The Company expects to continue to expand 
the scope of its research and development programs in future periods, which 
may result in substantial increases in research and development expenses, 
including costs associated with clinical development of ONYX-015. These 
research and development expenses may not be funded by collaborative 
partners. It is anticipated that the decision to transfer the mouse genomics 
research program to UCSF will have a favorable impact on operating expenses 
of approximately $400,000 in the first quarter of 1999.

GENERAL AND ADMINISTRATIVE EXPENSES

General and administrative expenses remained relatively flat at $1,331,000 
and $3,941,000 for the three and nine months ended September 30, 1998, 
respectively, as compared with $1,319,000 and $3,912,000 for the same periods 
in 1997. General and administrative expenses are expected to increase 
moderately to support the Company's research and development efforts.

NET INTEREST INCOME

The Company had net interest income of $408,000 and $1,342,000 for the three 
and nine months ended September 30, 1998, respectively, as compared with 
$511,000 and $1,533,000 for the same periods in 1997. The decrease in net 
interest income was due primarily to increased interest expense on the 
Company's line of credit arrangement.

LIQUIDITY AND CAPITAL RESOURCES

Since inception, the Company's cash expenditures have substantially exceeded 
its revenues and the Company has relied primarily on the proceeds from the 
sale of equity securities, revenue from collaborative research and 
development agreements and bank loans to fund its operations.

The Company's cash, cash equivalents and short-term investments were 
$34,871,000 at September 30, 1998, compared with $35,472,000 at December 31, 
1997. Increasing levels of clinical research and product development expenses 
associated with ONYX-015 resulted in approximately $8,839,000 of cash used in 
operations for the nine months ended September 30, 1998. The decrease in cash 
and investments of $601,000 at September 30, 1998 compared with December 31, 
1997 was due to cash used in operations and payment of bank loans partially 
offset by the private

                                       8


                       ONYX PHARMACEUTICALS, INC.

placement financing completed on January 12, 1998 which raised approximately 
$10 million. The Company expects cash used in operations will continue to 
increase as clinical development for ONYX-015 progresses.

Total capital expenditures for equipment and leasehold improvements for the 
nine-month period ended September 30, 1998 was $783,000. The Company expects 
to make expenditures of approximately $500,000 for the remainder of 1998 for 
capital equipment.

The Company believes that its existing capital resources and interest 
thereon, and anticipated revenues from existing collaborations will be 
sufficient to fund its current and planned operations through the end of 
1999. There can be no assurance, however, that changes in the Company's 
operating expenses will not result in the expenditure of such resources 
before such time, and in any event, the Company will need to raise 
substantial additional capital to fund its operations in future periods.

BUSINESS RISKS

The Company is at an early stage of development. The development of the 
Company's technology and proposed products will require a commitment of 
substantial funds to conduct these costly and time-consuming activities. All 
of the Company's potential products are in research or development and will 
require significant additional research and development efforts prior to any 
commercial use, including extensive preclinical and clinical testing as well 
as lengthy regulatory approval. The development of new products is subject 
to a number of significant risks. Potential products that appear to be 
promising at an early stage of development may not reach the market for a 
number of reasons. Such risks include the possibilities that the potential 
products will be found ineffective or unduly toxic during clinical trials, 
fail to receive necessary regulatory approvals, be difficult to manufacture 
on a large scale, be uneconomical to market or be precluded from 
commercialization by proprietary rights of third parties.

The Company is currently engaged in four self-funded Phase II clinical trials 
of ONYX-015 for the treatment of head and neck cancer and pancreatic cancer. 
The ability of the Company to obtain a corporate partner for ONYX-015 and to 
continue its development as a potential product will depend materially on the 
results of these trials. There is no assurance that such results will be 
positive or, even if they are positive, that they will be sufficiently strong 
to support the Company's corporate partnering or product development 
objectives.

In addition, many of the Company's potential products are subject to 
development and licensing arrangements with the Company's collaborators. 
Therefore, the Company is dependent on the research and development efforts 
of these collaborators. Moreover, the Company is entitled to only a portion 
of the revenues, if any, realized from the commercial sale of any of the 
potential products covered by the collaborations. Should the Company or its 
collaborators fail to perform in accordance with the terms of any of their 
agreements or terminate such agreements without cause, any consequent loss of 
revenue under the agreements could have a material adverse effect on the 
Company's results of operations.

There can be no assurance that the Company will be able to maintain existing 
collaborative agreements, negotiate collaborative arrangements in the future 
on acceptable terms, if at all, or that any such collaborative arrangements 
will be successful. To the extent that the Company is not able to maintain 
or establish such arrangements, the Company would be required to undertake 
such activities at its own expense.

The proposed products under development by the Company have never been 
manufactured on a commercial scale, and there can be no assurance that such 
products can be manufactured at a cost or in quantities necessary to make 
them commercially viable. The Company has no sales, marketing or 
distribution capability. If any of its products subject to collaborative 
agreements are successfully developed, the Company must rely on its 
collaborators to market such products. If the Company develops any products 
which are not subject to collaborative agreements, it must 

                                       9


                          ONYX PHARMACEUTICALS, INC.

either rely on other large pharmaceutical companies to market such products 
or must develop a marketing and sales force with technical expertise and 
supporting distribution capability in order to market such products directly. 

The Company intends to seek additional funding through collaborative 
arrangements, public or private equity or debt financings, capital lease 
transactions or other financing sources that may be available.  However, 
there can be no assurance that additional financing will be available on 
acceptable terms or at all.  If additional funds are raised by issuing equity 
securities, substantial dilution to existing stockholders may result.  If 
adequate funds are not available, the Company may be required to delay, 
reduce the scope of, or eliminate one or more of its research or development 
programs or to obtain funds through collaborative arrangements with others 
that are on unfavorable terms or that may require the Company to relinquish 
rights to certain of its technologies, product candidates or products that 
the Company would otherwise seek to develop itself.

The foregoing risks reflect the Company's early stage of development and the 
nature of its industry and proposed product.  Also inherent in the Company's 
stage of development is a range of additional risks, including competition, 
uncertainties regarding protection of patents and proprietary rights, 
government regulation and uncertainties regarding health care reform.

IMPACT OF THE YEAR 2000

Computer programs using two rather than four digits to identify the year in a 
date field may cause computer systems to malfunction in the year 2000.  Any 
computer programs that have time-related software may determine a date using 
"00" as the year 1900 rather than the year 2000. This could result in a 
system failure or miscalculations causing disruptions of operations, 
including, among other things, a temporary inability to engage in specific 
business activities.

The Company has appointed a task force comprised of certain members of 
management to initiate and monitor a Year 2000 ("Y2K") program.  The 
Company's plan to resolve the Y2K issue involves the following three phases: 
assessment, implementation of action plans and testing of systems to ensure 
compliance.  To date, the Company is approximately 70% complete with the 
assessment phase and expects to be 100% complete by January 31, 1999.  The 
assessments completed to date indicate that the financial systems of the 
Company are Y2K compliant. It is anticipated that the information technology 
systems of the Company will be 100% Y2K compliant by December 31, 1998. The 
Company intends to engage consultants to help it identify areas of exposure 
regarding its scientific research and development systems applications.  
There can be no assurance that the Company will be able to upgrade any or all 
of its systems in accordance with its Y2K program or, once upgraded, that the 
systems will be Y2K compliant.

The Company is gathering information about the Y2K compliance status 
of its significant suppliers and other third parties with which it has 
relationships.  The Company is requesting that its outside suppliers and 
other third parties notify the Company in writing of the status of their Y2K 
compliance programs.  To date, the Company is not aware of any outside 
supplier or other third party with a Y2K issue that would materially impact 
the Company's business operations.  However, there can be no assurance that 
the Company's outside suppliers and other third parties will be successful in 
their Y2K compliance efforts.

The Company believes that its costs associated with the upgrade and/or 
conversion of existing computer software and hardware relating to the Y2K 
issue will be less than $200,000 based on modifications to date as well as 
the amount of scientific research and development equipment that may have to 
be upgraded.

In the event that the Company does not upgrade its systems in a timely 
manner, the Company may encounter problems with the completion of certain 
scientific research and development experiments.  The Company currently has 
no contingency plans in place in the event it does not complete all phases of 
the Y2K program. The Company plans to evaluate the status of completion of 
its Y2K program in March 1999 and determine whether such a contingency plan 
is necessary.


                                       10

                          ONYX PHARMACEUTICALS, INC.

PART II:  OTHER INFORMATION




ITEM  6.  EXHIBITS AND REPORTS ON FORM 8-K

         a)  Exhibits

         Exhibit 27.1   Financial Data Schedule


         b)  Reports on Form 8-K

                 No reports on Form 8-K were filed during the period covered 
         by this report. 

                                       11

                          ONYX PHARMACEUTICALS, INC.

SIGNATURES

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

                                        ONYX PHARMACEUTICALS, INC.


                                     
Date:  November 13, 1998                By: /s/ Hollings C. Renton
                                            -----------------------
                                            Hollings C. Renton
                                            President, Chief Executive Officer and
                                            Director
                                            (Principal Executive Officer)




Date:  November 13, 1998                By: /s/ Douglas L. Blankenship
                                            --------------------------
                                            Douglas L. Blankenship
                                            Treasurer
                                            (Principal Financial and Accounting Officer)


                                       12

                          ONYX PHARMACEUTICALS, INC.
EXHIBIT INDEX


                                              
                                                 Sequentially
                                                   Numbered
Exhibit Number      Description of Exhibits          Page
- --------------      -----------------------          ----
    27.1            Financial Data Schedule