ABGENIX INC
10-Q, 1999-08-16
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                                    UNITED STATES
                          SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C. 20549

                                      ---------
                                      FORM 10-Q
                                      ---------

(Mark One)
[ X ] Quarterly report pursuant to Section 13 or 15(d) of the Securities
      Exchange Act of 1934

                          For the period ended June 30, 1999

                                          OR

[   ] Transition report pursuant to Section 13 or 15(d) of the Securities
      Exchange Act of 1934

                          Commission file number: 000-24207


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


               DELAWARE                                    94-3248826
   (State or other jurisdiction of                      (I.R.S. Employer
    incorporation or organization)                   Identification Number)


                                7601 DUMBARTON CIRCLE
                              FREMONT, CALIFORNIA 94555
                       (Address of principal executive offices)

                           TELEPHONE NUMBER (510) 608-6500
                 (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 / /

As of June 30,1999 there were 14,959,828 shares of the Registrant's Common Stock
outstanding.

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                                       1
<PAGE>

                                    ABGENIX, INC.

                                      FORM 10-Q

                                        INDEX

<TABLE>
<CAPTION>
                                                                                                    PAGE NO.
                                                                                                    --------
<S>                                                                                                 <C>
PART I - FINANCIAL INFORMATION

     ITEM 1 - FINANCIAL STATEMENTS

        Condensed Balance Sheets - June 30, 1999 and December 31, 1998 . . . . . . . . . . . . . . . .  3

        Condensed Statements of Operations - Three months and six months ended June 30, 1999
        and June 30, 1998 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

        Condensed Statements of Cash Flows - Three months and six months ended June 30, 1999
        and June 30, 1998. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5

        Notes to Condensed Financial Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . .  6

     ITEM 2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
     AND RESULTS OF OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8

PART II - OTHER INFORMATION

     ITEM 1 - LEGAL PROCEEDINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

     ITEM 2 - CHANGES IN SECURITIES AND USE OF PROCEEDS. . . . . . . . . . . . . . . . . . . . . . . . 29

     ITEM 3 - DEFAULTS UPON SENIOR SECURITIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

     ITEM 4 - SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. . . . . . . . . . . . . . . . . . . 30

     ITEM 5 - OTHER INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

     ITEM 6 - EXHIBITS AND REPORTS ON FORM 8-K . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

     SIGNATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
</TABLE>


                                       2
<PAGE>
                                 ABGENIX, INC.
                            CONDENSED BALANCE SHEETS
                (IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)

<TABLE>
<CAPTION>
                                                                               June 30,    December 31,
                                                                                 1999          1998
                                                                              -----------  ------------
                                                                              (Unaudited)
<S>                                                                           <C>          <C>
                                                ASSETS
Currents assets:
  Cash and cash equivalents                                                    $   3,010    $    1,415
  Marketable securities                                                           58,608        15,329
  Prepaid expenses and other current assets                                        2,337         1,438
                                                                              -----------  ------------
      Total current assets                                                        63,955        18,182

Property and equipment, net                                                        5,110         5,435
Deposits and other assets                                                          1,133           603
                                                                              -----------  ------------
                                                                               $  70,198    $   24,220
                                                                              -----------  ------------
                                                                              -----------  ------------

                                 LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                                             $   1,654    $      439
  Deferred revenue                                                                   425           425
  Accrued product development costs                                                2,111         1,225
  Other accrued liabilities                                                        1,452         1,293
  Current portion of long-term debt                                                1,729         1,699
                                                                              -----------  ------------
      Total current liabilities                                                    7,371         5,081

Long-term debt                                                                     1,308         2,180
Commitments
Stockholders' equity:
  Preferred stock, $.0001 par value; 5,000,000 shares authorized, none
    outstanding
  Common stock, $.0001 par value; 50,000,000 shares authorized, 14,959,828
    and 11,120,293 shares issued and outstanding at June 30, 1999 and
    December 31, 1998, respectively, at amount paid in                           108,726        55,842
  Additional paid-in capital                                                      31,978        31,588
  Deferred compensation                                                             (920)       (1,170)
  Accumulated deficit                                                            (78,265)      (69,301)
                                                                              -----------  ------------
      Total stockholders' equity                                                  61,519        16,959
                                                                              -----------  ------------
                                                                               $  70,198    $   24,220
                                                                              -----------  ------------
                                                                              -----------  ------------
</TABLE>

                            See accompanying notes.

                                       3
<PAGE>
                                 ABGENIX, INC.
                       CONDENSED STATEMENTS OF OPERATIONS
                      (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                                       Three Months Ended     Six Months Ended
                                                                            June 30,              June 30,
                                                                      --------------------  --------------------
                                                                        1999       1998       1999       1998
                                                                      ---------  ---------  ---------  ---------
<S>                                                                   <C>        <C>        <C>        <C>
Revenues:
  Revenue from collaborative agreements from related parties (net of
    related contributions to Xenotech of $195 and $310 for the three
    and six months ended June 30, 1998, respectively)                 $      --  $     212  $      --  $     502
  Contract revenue                                                        1,720        523      1,720      1,123
                                                                      ---------  ---------  ---------  ---------
      Total revenues                                                      1,720        735      1,720      1,625

Operating expenses:
  Research and development                                                5,312      3,553      9,878      8,919
  General and administrative                                              1,210        803      2,295      1,721
  Equity in income from the Xenotech joint venture                         (548)                 (540)
                                                                      ---------  ---------  ---------  ---------
      Total operating expenses                                            5,974      4,356     11,633     10,640
                                                                      ---------  ---------  ---------  ---------
Operating loss
Other income and expenses:
  Interest income                                                          (797)      (132)    (1,192)      (330)
  Interest expense                                                          111        161        244        310
                                                                      ---------  ---------  ---------  ---------
Net loss                                                              $  (3,568) $  (3,650) $  (8,965) $  (8,995)
                                                                      ---------  ---------  ---------  ---------
                                                                      ---------  ---------  ---------  ---------
Net loss per share                                                    $   (0.24) $   (0.45) $   (0.66) $   (1.11)
                                                                      ---------  ---------  ---------  ---------
                                                                      ---------  ---------  ---------  ---------
Shares used in computing net loss per share                              14,916      8,159     13,554      8,136
                                                                      ---------  ---------  ---------  ---------
                                                                      ---------  ---------  ---------  ---------
</TABLE>

                            See accompanying notes.

                                       4
<PAGE>
                                 ABGENIX, INC.
                       CONDENSED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                                           Six Months Ended
                                                                               June 30,
                                                                        ----------------------
                                                                           1999        1998
                                                                        ----------  ----------
<S>                                                                     <C>         <C>
Operating activities:
  Net loss                                                              $   (8,965) $   (8,995)
  Adjustments to reconcile net loss to net cash used by operating
    activities:
    Equity in (income) losses of Xenotech                                     (540)        310
    Depreciation and amortization                                              831         895
    Stock options issued to consultants                                        390
    Changes for certain assets and liabilities:
      Receivable from related party                                                       (406)
      Prepaid expenses and other current assets                               (899)       (448)
      Deposits and other assets                                                           (102)
      Accounts payable                                                       1,215         (28)
      Accrued product development costs                                        886
      Other accrued liabilities                                                159      (1,439)
                                                                        ----------  ----------
  Net cash used in operating activities                                     (6,923)    (10,213)
                                                                        ----------  ----------
Investing activities:
  Purchases of marketable securities                                       (48,462)     (7,023)
  Sales of marketable securities                                             5,183      10,705
  Capital expenditures                                                        (245)       (151)
  Contributions to Xenotech                                                               (321)
                                                                        ----------  ----------
  Net cash used in investing activities                                    (43,524)      3,210
                                                                        ----------  ----------
Financing activities:
  Net proceeds from issuances of common stock                               52,884          91
  Net proceeds from issuances of redeemable convertible preferred
    stock                                                                                3,936
  Principal payments on long-term debt and capital lease obligations          (842)       (847)
                                                                        ----------  ----------
  Net cash provided in financing activities                                 52,042       3,180
                                                                        ----------  ----------
Net increase (decrease) in cash and cash equivalents                         1,595      (3,823)

Cash and cash equivalents at the beginning of the period                     1,415       4,617
                                                                        ----------  ----------
Cash and cash equivalents at the end of the period                      $    3,010  $      794
                                                                        ----------  ----------
                                                                        ----------  ----------
</TABLE>

                            See accompanying notes.

                                       5
<PAGE>

                                    ABGENIX, INC.

                            NOTES TO FINANCIAL STATEMENTS
                                    JUNE 30, 1999

1.    BASIS OF PRESENTATION

The unaudited condensed financial statements of Abgenix, Inc. (the "Company" or
"Abgenix") included herein have been prepared by the Company pursuant to the
rules and regulations of the Securities and Exchange Commission. Certain
information or footnote disclosure normally included in financial statements
prepared in accordance with generally accepted accounting principles have been
condensed or omitted pursuant to such rules and regulations. In the opinion of
the Company, the accompanying unaudited condensed financial statements contain
all adjustments, consisting only of normal recurring adjustments, necessary to
present fairly the financial information included therein. While the Company
believes that the disclosures are adequate to make the information not
misleading, it is suggested that these financial statements be read in
conjunction with the audited financial statements for the year ended December
31, 1998 and accompanying notes included in the Company's Annual Report as
filed on Form 10-K with the Securities and Exchange Commission on March 18,
1999. The results of operations for the quarter and six months ended June 30,
1999 are not necessarily indicative of the results to be expected for the full
year or for any other future period.


2.    NET LOSS PER SHARE

Net loss per share is based on the weighted average number of common stock
outstanding.  Potentially dilutive securities have been excluded from the
computation, as their effect is antidilutive.


3.    FOLLOW-ON PUBLIC OFFERING

On March 4, 1999, the Company completed a follow-on public offering and issued
3,000,000 shares of its common stock to the public at a price of $15.00 per
share.  The Company received net proceeds of $42.3 million, after deducting
underwriting discounts and commissions and before deducting expenses payable by
the Company.  On April 7, 1999 the Company's underwriters exercised an option to
purchase an additional 208,000 shares of common stock at a price of $15.00 per
share to cover over-allotments.  The Company received net proceeds of
approximately $2.9 million, net of underwriting discounts and commissions.


4.    COLLABORATION AND LICENSE AGREEMENTS

In January 1999, the Company entered into a research license and option
agreement with AVI BioPharma ("AVI") to generate fully human antibodies to a
specified antigen. This agreement allows AVI to conduct research and provides
the partner with an option, for a limited time, to enter into a product license
agreement at a future date. If the product license agreement is signed, it may
provide the Company with additional license fees, milestone payments and
royalties.


                                       6
<PAGE>

In January 1999, the Company entered into a multi-antigen research license and
option agreement with Genentech. Under the agreement, the Company granted
Genentech a license to utilize XenoMouse technology in its antibody product
research efforts and an option to obtain product licenses for up to ten antigen
targets, but not more than two in any one year, over the agreement's six year
term. Included in the ten are the two previously identified antigen targets
under the now superceded research license and option agreement at the new
option, license fee and milestone payment levels. The agreement can be renewed
by Genentech for up to an additional four targets over a subsequent three year
period. Genentech acquired 495,356 shares of the Company's common stock for an
aggregate purchase price of $8,000,000. To renew the agreement at the end of the
sixth year, Genentech must purchase an additional $2,500,000 of the Company's
common stock at a 50% premium to the then current market price.

In March 1999, the Company entered into a research collaboration agreement with
BASF Bioresearch Corporation ("BASF"). Under the agreement, BASF can utilize
Abgenix's XenoMouse technology to develop fully human antibodies to an
undisclosed antigen target. In return, Abgenix will receive an upfront research
payment, and could receive additional fees and milestone payments plus royalties
on future product sales by BASF, if any. BASF will be responsible for product
development, manufacturing and marketing of any products developed through the
collaboration.

In April 1999 the Company entered into a research, option and license
agreement with Amgen, Inc. ("Amgen").  Under the agreement, the Company will
use its XenoMouse-TM- technology to generate for Amgen fully human monoclonal
antibodies to an undisclosed antigen.  In return, Abgenix will receive an
upfront research payment and could receive additional fees and milestone
payments plus royalties on future product sales by Amgen, if any.  Amgen will
be responsible for product development, manufacturing, and marketing of any
products developed through the collaboration.

In April 1999 the Company entered into a collaboration agreement with the United
States Army Medical Research Institute of Infectious Diseases (USAMRIID) to
develop antibodies that could potentially protect U.S. troops during biological
warfare. Under the agreement, USAMRIID will use the Company's Xenomouse
technology to make fully human monoclonal antibodies against filoviruses.

In June 1999 the Company entered into a collaboration agreement with Japan
Tobacco, Inc. on ABX-IL8 clinical development. Under the agreement, Japan
Tobacco will make certain payments to the Company and, subject to additional
payments, could potentially receive the right to use clinical data generated by
the Company in its own regulatory filings in Japan, Taiwan and Korea.


                                       7
<PAGE>

                                    ABGENIX, INC.

ITEM 2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
RESULTS OF OPERATIONS

      THE FOLLOWING MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS CONTAINS FORWARD-LOOKING STATEMENTS WITHIN THE MEANING
OF SECTION 27A OF THE SECURITIES ACT OF 1933 AND SECTION 21E OF THE SECURITIES
EXCHANGE ACT OF 1934. THESE STATEMENTS INCLUDE THE STATEMENTS IN PARAGRAPH TWO
UNDER "OVERVIEW" REGARDING OUR COMMERCIALIZATION STRATEGY, THE STATEMENTS IN
PARAGRAPH THREE UNDER "OVERVIEW" REGARDING FUTURE REVENUES FROM CURRENT AND
POTENTIAL FUTURE COLLABORATIVE ARRANGEMENTS, THE STATEMENTS IN PARAGRAPH SIX
UNDER "OVERVIEW" REGARDING ADVANTAGES TO GENENTECH OF EARLY IMPLEMENTATION OF
XENOMOUSE TECHNOLOGY, THE STATEMENTS IN PARAGRAPH SEVEN UNDER "OVERVIEW"
REGARDING THE RESULTS FROM ABX-CBL CLINICAL TRIALS, THE STATEMENTS IN PARAGRAPH
FIVE UNDER "LIQUIDITY AND CAPITAL RESOURCES" REGARDING EXPANSION OF RESEARCH AND
DEVELOPMENT USE OF AVAILABLE RESOURCES DURING FUTURE PERIODS, THE STATEMENTS IN
PARAGRAPH SIX UNDER "LIQUIDITY AND CAPITAL RESOURCES" REGARDING THE SUFFICIENCY
OF OUR AVAILABLE RESOURCES TO MEET WORKING CAPITAL AND CAPITAL EXPENDITURE
REQUIREMENTS, AND THE STATEMENTS BELOW UNDER "ADDITIONAL FACTORS AFFECTING
FUTURE OPERATING RESULTS", AMONG OTHERS. THESE FORWARD-LOOKING STATEMENTS ARE
BASED ON CURRENT EXPECTATIONS AND ENTAIL VARIOUS RISKS AND UNCERTAINTIES THAT
COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM THOSE PROJECTED IN THE
FORWARD-LOOKING STATEMENTS. SUCH RISKS AND UNCERTAINTIES ARE SET FORTH HEREIN
AND BELOW UNDER "ADDITIONAL FACTORS AFFECTING FUTURE OPERATING RESULTS".

OVERVIEW

We are a biopharmaceutical company that develops and intends to commercialize
antibody therapeutic products for the treatment of a variety of disease
conditions, including transplant-related diseases, inflammatory and autoimmune
disorders, and cancer. We have developed XenoMouse technology, a proprietary
technology, which we believe enables quick generation of high affinity, fully
human antibody product candidates to essentially any disease target appropriate
for antibody therapy. We intend to use XenoMouse technology to build a large and
diversified product portfolio that we plan to commercialize either through
corporate collaborations or internal product development programs.

We have established collaborative arrangements to use XenoMouse technology to
produce fully human antibodies with 11 companies covering at least 14 antigen
targets. Pursuant to these collaborations, we and our partners intend to
generate antibody product candidates for the treatment of cancer, inflammation,
transplant rejection, cardiovascular disease and growth factor modulation. Our
collaborative partners include Cell Genesys, Inc., Pfizer, Inc., Schering-Plough
Research Institute, Genentech, Inc., Millennium BioTherapeutics, Inc., Research
Corporation Technologies, Inc., Centocor, Inc., AVI BioPharma, Inc., BASF
Bioresearch Corporation, Amgen, Inc. and Japan Tobacco, Inc. Among our 11
collaborative partners, Pfizer, Genentech and Millennium BioTherapeutics have
each entered into additional collaborations with us specifying additional
antigens for XenoMouse antibody development. We expect that substantially all of
our revenues for the foreseeable future will result from payments under
collaborative arrangements. The terms of the collaboration arrangements vary,
reflecting the value we add to the development of any particular product
candidate. These collaborations typically provide our collaborative partners
with access to XenoMouse technology for the purpose of generating fully human
antibody product candidates to one or more specific antigen targets provided by
the collaborative partner. In most cases, we provide our mice to collaborative
partners who then carry out immunizations with their specific antigen target. In
other cases, we may immunize the mice with the collaborative partner's antigen
target for additional compensation. As an extension of this concept, we may
grant multi-antigen research licenses to select collaborative partners, allowing
them to incorporate XenoMouse technology into early stages of their antibody
product research


                                       8
<PAGE>

efforts without specifically knowing the antigens that they intend to target
for XenoMouse antibody generation. These collaborative partners will need to
execute product licenses for any antibody product they wish to develop and
commercialize.

The financial terms of our existing collaborations typically include upfront
payments, potential license fees and milestone payments paid to us by the
collaborative partner. Based on our collaborative agreements entered into, these
payments and fees may approximate $8.0-$10.0 million per antigen target assuming
our collaborative partner takes the antibody product candidate to
commercialization. In certain instances, the collaborative partner could make
reimbursement payments to us for research that we conduct on its behalf.
Additionally, if a product receives marketing approval from the FDA or an
equivalent foreign agency, we are entitled to receive royalties on any future
product sales by the collaborative partner. Furthermore, the collaborative
partner will be responsible for worldwide manufacturing, product development and
marketing of any product developed through the collaboration.

Our dependence on collaborative and licensing arrangements with third parties
subjects us to a number of risks. Agreements with collaborative partners
typically allow them significant discretion in electing whether to pursue any of
the planned activities. We cannot control the amount and timing of resources our
collaborative partners may devote to the product candidates. Even if we fulfill
our obligations under a collaborative agreement, the collaborative partner can
terminate the agreement at any time following proper written notice. If any
collaborative partner were to terminate or breach its agreement with us, or
otherwise fail to complete its obligations in a timely manner, our business,
financial condition and results of operations may be materially adversely
affected.

We also have four antibody product candidates that are under development
internally. Our lead product candidate, ABX-CBL, is an in-licensed mouse
antibody. We recently completed a multi-center confirmatory Phase II clinical
trial for ABX-CBL for the treatment of a transplant-related disease known as
graft versus host disease. Our other three product candidates were generated
using XenoMouse technology. We completed a Phase I clinical trial for our fully
human antibody product candidate in psoriasis, ABX-IL8, and began a Phase I/II
clinical trial in November 1998. In addition, we entered a Phase I clinical
trial for ABX-IL8 in rheumatoid arthritis in January 1999. We entered a Phase I
clinical trial for our fully human antibody product candidate in cancer,
ABX-EGF, in July 1999. We are in preclinical development with our fully human
antibody product candidate for use in the treatment of chronic immunological
disorders, ABX-RB2.

In January 1999, we entered into a multi-antigen research license and option
agreement with Genentech. Under the agreement, we granted Genentech a license to
utilize XenoMouse technology in its antibody product research efforts and an
option to obtain product licenses for up to ten antigen targets. Included in the
ten are two previously identified antigen targets under previous collaboration
arrangements with Genentech. We believe that this license will allow Genentech
to integrate the use of XenoMouse technology much earlier in its research and
development efforts, allowing a more complete realization of the advantages of
XenoMouse technology. We plan to pursue similar multi-antigen research licenses
with new or existing collaborative partners.

In February 1999, we reported the preliminary results of our multi-center
confirmatory Phase II clinical trial for ABX-CBL in graft versus host disease.
This trial supports the safety and efficacy data seen in previously published
clinical trials conducted by third parties. The trial was conducted at nine
sites on 27 patients. Data from 23 of the 27 patients was evaluated for efficacy
at four dosing levels. A response rate of 73% was reported among the 15 patients
in the three highest dose groups. The remaining eight patients reported a 25%
response at the lowest dose. We believe the treatment was safe and well
tolerated except for temporary


                                       9
<PAGE>

muscle pain. We will submit the complete report to the FDA and, if approved,
expect to commence a registration clinical trial for ABX-CBL in the latter
half of 1999.

In 1991, Cell Genesys and Akros Pharma, Inc., (formerly JT America, Inc.),
formed Xenotech, an equally owned joint venture, to develop XenoMouse technology
and to commercialize products generated from XenoMouse technology. Upon the
organization of Abgenix, Cell Genesys assigned its rights in Xenotech to
Abgenix. Xenotech funds its research and development activities through capital
contributions from Abgenix and Akros Pharma, Inc., and Abgenix is obligated to
fund 50% of all Xenotech expenses. During 1995, 1996 and 1997, Abgenix derived
revenues principally from performing research for Xenotech for the continued
development of XenoMouse technology.

In connection with the grant of stock options since our organization on July 15,
1996, we have recorded aggregate deferred compensation of approximately $2.3
million through December 31, 1998, representing the difference between the
deemed fair value of the common stock for accounting purposes and the option
exercise price at the date of grant. These amounts are presented as a reduction
of stockholders' equity and are amortized ratably over the vesting period of the
applicable options, generally four years. These valuations resulted in charges
to operations of $125,000 and $149,000 in three months ended March 31, 1999 and
1998, respectively and $ 250,000 and $298,000 in the six months ended June
30,1999 and 1998, respectively.

RESULTS OF OPERATIONS

THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 1999 AND 1998

Revenue under collaborative agreements from related parties for the three months
and the six months ended June 30, 1998 consisted of revenue derived principally
from performing research for Xenotech. The development of XenoMouse technology
was substantially completed in 1996 with modest ongoing research activities in
1997 and 1998.  Therefore, we do not expect to recognize significant revenues
from research performed on behalf of Xenotech in the future.

Contract revenue of $1.7 million in the three months and six months ended June
30, 1999 consisted primarily of non-refundable signing fees, a fee for the
achievement of a research milestone under an existing collaborative agreement
and a non-refundable reimbursement fee for clinical trial costs. Contract
revenues for the three months ended June 30, 1998 consisted of research
milestones under collaborative agreements and for the six months ended June 30,
1998 principally of a non-refundable signing fee paid in connection with the
execution of a collaborative agreement in February 1998.

Research and development expenses consist primarily of compensation and other
expenses related to research and development personnel, costs associated with
preclinical testing and clinical trials of our product candidates and facilities
expenses.  Research and development expenses increased from $3.6 million in the
three months ended June 30, 1998 to $5.3 million in the three months ended June
30, 1999 and from $8.9 million in the six months ended June 30, 1998 to $9.9
million in the six months ended June 30, 1999.  The increase in research and
development expenses reflects primarily the costs associated with the clinical
trials of ABX-CBL and ABX-IL8. Additionally, the increase is due in part to the
costs of Xenotech product licenses, increased legal costs related to patents,
and the valuation of stock options awarded to certain consultants.

General and administrative expenses include compensation and other expenses
related to finance and administrative personnel, professional services and
facilities. General and administrative expenses increased from $0.8 million in
the three months ended June 30, 1998 to $1.2 million in the three months ended
June 30, 1999 and from $1.7 million in the six months ended June 30, 1998 to
$2.3 million in the six months ended


                                       10
<PAGE>

June 30, 1999.  The increase in general and administrative expenses reflects
additional investor relation costs due to being a publicly traded company and
increased financing activity, primarily related to our follow-on public
offering. Additionally, the increase is due in part to personnel costs
including recruiting costs and an accrual for incentive compensation, which
is based on the Company meeting certain annual objectives.

Equity in income from the Xenotech joint venture in 1999 reflects our percentage
ownership in the net income from the joint venture. In the three months and six
months ended June 30, 1999, the joint venture recorded net income primarily from
the sale of licenses to Abgenix and our partner, Akros Inc. In the three months
and six months ended June 30, 1998, the joint venture incurred losses. For the
three months and six months ended June 30, 1998, the Company's equity in those
losses was netted against the Company's revenues from the joint venture.

Other income and expenses consist of interest income from cash, cash equivalents
and short-term investments and interest expense incurred in connection with
equipment lease line financing and loan facilities. Interest income increased
due to higher average balances of short-term investments as a result of our
initial and follow-on public offerings. Interest expense decreased due to the
pay down of related debt.

LIQUIDITY AND CAPITAL RESOURCES

Since formation, we have financed our operations primarily through capital
contributions by, and borrowings from Cell Genesys, private placements of our
capital stock, an initial public offering of common stock in 1998 and a
follow-on public offering of common stock in March and April 1999, revenue from
collaborative arrangements, equipment leaseline financings and loan facilities.
During the six months ended June 30, 1999 we received net cash of $52.9 million
principally from the following financing activities: $42.3 million from the sale
of 3,000,000 shares of common stock in a follow-on public offering in March
1999; $2.9 million from the sale of 208,000 shares of common stock in April 1999
pursuant to the exercise of the underwriters' over-allotment option granted in
connection with the follow-on public offering; and $8.0 million from the sale of
495,356 shares of common stock to Genentech in January 1999.

We have incurred operating losses in each of the last three years of operation,
including net losses of approximately $7.1 million in 1996, $35.9 million in
1997 and $16.8 million in 1998 and $9.0 million in the six months ended June 30,
1999. As of June 30, 1999, we had an accumulated deficit of approximately $78.3
million. Our losses have resulted principally from costs incurred in performing
research and development for our XenoMouse technology and antibody product
candidates, from the non-recurring cross-license and settlement charge
(described in our 1998 Annual Report) and from general and administrative costs
associated with our operations.  See our Annual Report "Management's Discussion
and Analysis of Financial Condition and Results of Operations - Overview" for a
description of the cross-license and settlement. We expect to incur additional
operating losses until at least the year 2000 as a result of our expenditures
for research and product development, including costs associated with conducting
preclinical testing and clinical trials. We expect the amount of such losses
will fluctuate significantly from quarter to quarter as a result of increases or
decreases in our research and development efforts, the execution or termination
of collaborative arrangements, or the initiation, success or failure of clinical
trials.

The Company's net cash used in operating activities was $6.9 million and $10.2
million for the six months ended June 30, 1999 and 1998, respectively.  The cash
used for operations was primarily to fund research and development expenses and
manufacturing costs related to the development of new products.

As of June 30, 1999, we had cash, cash equivalents and marketable securities of
$61.6 million. We have invested the net proceeds of our initial and follow on
public offering in highly liquid, interest bearing,


                                       11
<PAGE>

investment grade securities. We have an agreement with a financing company
under which we have financed purchases of about $2.0 million of our
laboratory and office equipment. The lease term is 48 months and bears
interest at rates ranging from 12.5% to 13.0%, which are based on the change
in the five year U.S. Treasury rate. We also have a construction financing
line with a bank in the amount of $4.3 million that was used to finance
construction of leasehold improvements at our current facility. The line
matures in January 2001, bears interest at a rate of prime plus one percent
(8.75% at June 30, 1999 and December 31, 1998). As of June 30, 1999, no
further borrowings were available under the construction financing line.

We plan to continue to expend substantial resources for the expansion of
research and development, including costs associated with conducting preclinical
testing and clinical trials. We may be required to expend substantial funds if
unforeseen difficulties arise in the course of completing required additional
development of product candidates, manufacturing of product candidates,
performing preclinical testing and clinical trials of such product candidates,
obtaining necessary regulatory approvals or other aspects of our business. Our
future liquidity and capital requirements will depend on many factors,
including:

- -  continued scientific progress in our research and development programs;

- -  size and complexity of these programs;

- -  scope and results of preclinical testing and clinical trials;

- -  time and expense involved in obtaining regulatory approvals;

- -  competing technological and market developments;

- -  establishment of further collaborative arrangements;

- -  maintaining current collaborations;

- -  time and expense of filing and prosecuting patent applications and enforcing
   patent claims;

- -  cost of establishing manufacturing capabilities, conducting
   commercialization activities and arrangements;

- -  product in-licensing; and

- -  other factors not within our control.

We believe that our current cash balances, cash equivalents, marketable
securities and the cash generated from our collaborative arrangements will be
sufficient to meet our operating and capital requirements for at least the next
two years. However, we may need additional financing within this timeframe. We
may need to raise additional funds through public or private financing,
collaborative relationships or other arrangements. We cannot assure you that
such additional funding, if needed, will be available on terms favorable to us.
Furthermore, any additional equity financing may be dilutive to stockholders,
and debt financing, if available, may involve restrictive covenants.
Collaborative arrangements may require us to relinquish our rights to certain of
our technologies, products or marketing territories. Our failure to raise
capital when needed may have a material adverse effect on our business,
financial condition and results of operations.


                                       12
<PAGE>

As of December 31, 1998, we had federal net operating loss carryforwards of
approximately $36.5 million. Our net operating loss carryforwards exclude losses
incurred prior to the organization of Abgenix in July 1996. Further, the amounts
associated with the cross-license and settlement that have been expensed for
financial statement accounting purposes have been capitalized and are being
amortized over a period of approximately fifteen years for tax purposes. The net
operating loss and credit carryforwards will expire in the years 2011 through
2018, if not utilized. Utilization of the net operating losses and credits may
be subject to a substantial annual limitation due to the "change in ownership"
provisions of the Internal Revenue Code of 1986 and similar state provisions.
The annual limitation may result in the expiration of net operating losses and
credits before utilization.

YEAR 2000

The Year 2000 issue is the result of computer programs being written using two
digits rather than four to define the applicable year. Any of our computer
programs or hardware that have date-sensitive software or embedded chips may
recognize a date using "00" as the year 1900 rather than the year 2000. This may
result in a system failure or miscalculations causing disruptions of operations,
including, among other things, a temporary inability to receive supplies from
our vendors, or operate our accounting and other internal systems.

Our plan to resolve the Year 2000 issue is based on a recently completed
assessment of our exposure. All of our time-sensitive software is widely used
and purchased from major vendors, all of whom have announced that their software
is either currently Year 2000-compliant or will be made so with upgrades before
the end of 1999. We have already purchased the Year 2000-compliant upgrade of
our accounting system. We have determined that each of our 60 personal computers
is compliant.   We have determined that our telephone, voicemail and network
equipment is not compliant and will be upgraded.  In addition, we will be
gathering information about the Year 2000 compliance status of third parties
with whom we have significant relationships to determine the extent to which our
operations are vulnerable to these third parties' failure to solve their own
Year 2000 issue. None of our systems interface with those of third parties.

Upgrading the accounting system was already planned in order to acquire the
benefits of its improved features, and was not accelerated by the Year 2000
issue. We believe that the total cost of our compliance with the Year 2000 issue
will be less than $50,000.

We believe we have an effective program in place to resolve the Year 2000 issue
in a timely manner. However, should our software vendors be unable to address
the Year 2000 compliance of their products, or should our suppliers' operations
be disrupted by the Year 2000 issue, then our ability to serve our collaborative
partners and develop products may be materially and adversely impacted. Our
contingency plans for minimizing the impact include increasing supplies of
materials used in clinical trials, establishing accounts with alternative
vendors, and temporarily employing manual accounting systems until alternative
systems can be installed.

ADDITIONAL FACTORS AFFECTING FUTURE OPERATING RESULTS

Abgenix became a public company in July 1998.  Included here are risk factors as
updated from the Company's Annual Report.  The following factors represent
current challenges that we face which create risk and uncertainty.  Failure to
adequately overcome any of the following challenges, either singly or in
combination, could materially adversely effect our results of operations,
business, or financial position.


                                       13
<PAGE>

OUR XENOMOUSE TECHNOLOGY MAY NOT PRODUCE SAFE, EFFICACIOUS OR COMMERCIALLY
VIABLE PRODUCTS

Our XenoMouse technology is a new approach to the generation of antibody
therapeutic products. We have not commercialized any antibody products based on
XenoMouse technology. We are not aware of any commercialized, fully human
antibody therapeutic products that have been generated from any technologies
similar to ours. Our antibody product candidates are still at a very early stage
of development. As of July 31, 1999, we have begun clinical trials with respect
to only two fully human antibody product candidates, ABX-IL8 and ABX-EGF. We
cannot be certain that XenoMouse technology will generate antibodies against all
the antigens to which it is exposed in an efficient and timely manner, if at
all. Furthermore, XenoMouse technology may not result in any meaningful benefits
to our current or potential collaborative partners or be safe and efficacious
for patients. If XenoMouse technology fails to generate antibody product
candidates that lead to the successful development and commercialization of
products, our business, financial condition and results of operations will be
materially adversely affected.

CLINICAL TRIALS FOR OUR PRODUCT CANDIDATES WILL BE EXPENSIVE AND THEIR OUTCOME
IS UNCERTAIN

Conducting clinical trials is a lengthy, time-consuming and expensive process.
Before obtaining regulatory approvals for the commercial sale of any products,
we must demonstrate through preclinical testing and clinical trials that our
product candidates are safe and effective for use in humans. We will incur
substantial expense for, and devote a significant amount of time to, preclinical
testing and clinical trials.

Historically, the results from preclinical testing and early clinical trials
have often not been predictive of results obtained in later clinical trials. A
number of new drugs and biologics have shown promising results in clinical
trials, but subsequently failed to establish sufficient safety and efficacy data
to obtain necessary regulatory approvals. Data obtained from preclinical and
clinical activities are susceptible to varying interpretations, which may delay,
limit or prevent regulatory approval. In addition, regulatory delays or
rejections may be encountered as a result of many factors, including changes in
regulatory policy during the period of product development.

As of July 31, 1999, three of our product candidates, ABX-CBL, ABX-IL8 and
ABX-EGF are in clinical trials. Patient follow-up for these clinical trials has
been limited. To date, data obtained from these clinical trials has been
insufficient to demonstrate safety and efficacy under applicable FDA guidelines.
As a result, such data will not support an application for regulatory approval
without further clinical trials. Clinical trials conducted by Abgenix or by
third parties on our behalf may not demonstrate sufficient safety and efficacy
to obtain the requisite regulatory approvals for ABX-CBL, ABX-IL8, ABX-EGF or
any other potential product candidates. Regulatory authorities may not permit us
to undertake any additional clinical trials for our product candidates.

In addition, our other product candidates are in preclinical development, and we
have not submitted investigational new drug applications nor begun clinical
trials for such product candidates. Our preclinical or clinical development
efforts may not be successfully completed. We may not file further
investigational new drug applications. Our clinical trials may not commence as
planned.

Completion of clinical trials may take several years or more. The length of time
generally varies substantially according to the type, complexity, novelty and
intended use of the product candidate. Our commencement and rate of completion
of clinical trials may be delayed by many factors, including:

- -     inability to manufacture sufficient quantities of materials used for
      clinical trials;


                                       14
<PAGE>

- -     slower than expected rate of patient recruitment;

- -     inability to adequately follow patients after treatment;

- -     unforeseen safety issues;

- -     lack of efficacy during the clinical trials; or

- -     government or regulatory delays.

We have limited experience in conducting and managing clinical trials. We rely
on third parties, including our collaborative partners, to assist us in managing
and monitoring clinical trials. Our reliance on such third parties may result in
delays in completing, or failing to complete, such trials if they fail to
perform under our agreements with them.

Our product candidates may fail to demonstrate safety and efficacy in clinical
trials. Such failure may delay development of other product candidates, and
hinder our ability to conduct related preclinical testing and clinical trials.
As a result of such failures, we may also be unable to obtain additional
financing. Our business, financial condition and results of operations will be
materially adversely affected by any delays in, or termination of, our clinical
trials.

THE CLINICAL SUCCESS OF ABX-CBL IS UNCERTAIN

We recently completed a multi-center confirmatory Phase II trial in graft versus
host disease, or GVHD. As of June 30, 1999, ABX-CBL had been administered to a
total of only 162 patients for GVHD and organ transplant rejection indications.
ABX-CBL was administered to a total of 85 of these 162 patients by third parties
prior to Abgenix obtaining an exclusive license to ABX-CBL. In our clinical
trials, we administered ABX-CBL to only 77 of these patients, 27 of which were
used for our preliminary Phase II report submitted to the FDA. We cannot rely on
data obtained from patients studied prior to our obtaining an exclusive license
to ABX-CBL to support the efficacy of ABX-CBL in an application for regulatory
approval. In addition, our clinical trials are being conducted with patients who
have failed conventional treatments and who are in the most advanced stages of
GVHD. During the course of treatment, these patients can die or suffer adverse
medical effects for reasons that may not be related to ABX-CBL. Such adverse
effects may affect the interpretation of clinical trial results.

As an extension to the original Phase II trial protocol, we filed for and
received permission from the FDA to enroll additional patients at a single dose.
Our application to the FDA for approval to advance to registration clinical
trials will contain the original Phase II data plus all additional data then
available from the extension protocol. There can be no assurance that the
results of the extension protocol will be favorable or will extend the findings
of the original Phase II study. In addition, the FDA may view our application as
insufficient and require additional clinical trials before allowing us to
commence a registration clinical trial. Additional clinical trials will be
extensive, expensive and time-consuming. If ABX-CBL fails to receive regulatory
approval, our business, financial condition and results of operations may be
materially adversely affected.


                                       15
<PAGE>

SUCCESSFUL DEVELOPMENT OF OUR PRODUCTS IS UNCERTAIN

Our development of current and future product candidates is subject to the risks
of failure inherent in the development of new pharmaceutical products and
products based on new technologies. These risks include:

- -     delays in product development, clinical testing or manufacturing;

- -     unplanned expenditures in product development, clinical testing or
      manufacturing;

- -     failure in clinical trials or failure to receive regulatory approvals;

- -     emergence of superior or equivalent products;

- -     inability to manufacture product candidates on a commercial scale;

- -     inability to market products due to third-party proprietary rights;

- -     election by our collaborative partners not to pursue product development;

- -     failure by our collaborative partners to successfully develop products;
      and

- -     failure to achieve market acceptance.

Because of these risks, our research and development efforts or those of our
collaborative partners may not result in any commercially viable products. To
date, none of our collaborative partners has exercised its right to obtain a
product license. If a significant portion of these development efforts is not
successfully completed, required regulatory approvals are not obtained, or any
approved products are not commercially successful, our business, financial
condition and results of operations will be materially adversely affected.

WE ARE AN EARLY STAGE COMPANY

You must evaluate us in light of the uncertainties and complexities present in
an early stage biopharmaceutical company. Our product candidates are in early
stages of development. We will require significant additional investment in
research and development, preclinical testing and clinical trials, regulatory
and sales and marketing activities to commercialize current and future product
candidates. We cannot assure you that such product candidates, if successfully
developed, will generate sufficient or sustainable revenues to enable us to be
profitable.

WE HAVE A HISTORY OF LOSSES

We have incurred net losses in each of the last four years of operation,
including net losses of approximately $8.3 million in 1995, $7.1 million in
1996, $35.9 million in 1997 and $16.8 million in 1998.  We have also incurred
net losses of approximately $9.0 million in the six months ended June 30, 1999.
As of June 30, 1999, our accumulated deficit was approximately $78.3 million.
Our losses have resulted principally from:

- -     research and development costs relating to the development of our
      XenoMouse technology and antibody product candidates;


                                       16
<PAGE>

- -     cross-license and settlement costs relating to our patent portfolio; and

- -     general and administrative costs relating to our operations.

We expect to incur additional operating losses until at least the year 2000 as a
result of increases in our research and development costs, including costs
associated with conducting preclinical testing and clinical trials. We expect
that the amount of operating losses will fluctuate significantly from quarter to
quarter as a result of increases or decreases in our research and development
efforts, the execution or termination of collaborative arrangements, or the
initiation, success or failure of clinical trials. See "Management's Discussion
and Analysis of Financial Condition and Results of Operations."

OUR FUTURE PROFITABILITY IS UNCERTAIN

Prior to June 1996, our business was owned by Cell Genesys and operated as a
business unit. Since that time, we have funded our research and development
activities primarily from contributions from Cell Genesys, private placements of
our capital stock, the initial public offering of our common stock, the
follow-on public offering of our common stock, revenues generated from our
collaborative arrangements, equipment leaseline financings and loan facilities.
We expect that substantially all of our revenues for the foreseeable future will
result from payments under collaborative arrangements. To date, such payments
have been in the form of upfront payments, reimbursement for research and
development expenses and milestone payments, but may include license fees in the
future. Payments under our existing and any future collaborative arrangements
will be subject to significant fluctuation in both timing and amount. Our
revenues may not be indicative of our future performance or of our ability to
continue to achieve such milestones. Our revenues and results of operations for
any period may also not be comparable to the revenues or results of operations
for any other period. We cannot assure you that we will:

- -     enter into further collaborative arrangements;

- -     successfully complete preclinical or clinical trials;

- -     obtain required regulatory approvals;

- -     successfully develop, manufacture and market product candidates; or

- -     generate additional revenues or profitability.

If we fail to achieve any of the above goals, our business, financial condition
and results of operations will be materially adversely affected. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."

WE WILL NEED TO FIND COLLABORATIVE PARTNERS TO DEVELOP MANY OF OUR PRODUCT
CANDIDATES

Our strategy for the development and commercialization of antibody therapeutic
products depends, in large part, upon the formation of collaborative
arrangements with several collaborative partners. Potential collaborative
partners include pharmaceutical and biotechnology companies, academic
institutions and other entities. We must enter into these collaborations to
successfully develop and commercialize product candidates. Such collaborations
are necessary in order for us to:

- -     access proprietary antigens for which we can generate fully human
      antibody products;


                                       17
<PAGE>

- -     fund our research and development activities;

- -     fund preclinical testing, clinical trials and manufacturing;

- -     seek and obtain regulatory approvals; and

- -     successfully commercialize existing and future product candidates.

Only a limited number of fully human antibody product candidates have been
generated pursuant to our collaborations. None of these collaborative product
candidates has entered clinical testing and may not result in commercially
successful products. Current or future collaborative arrangements may not be
successful. If we fail to maintain our existing collaborative arrangements or to
enter into additional collaborative arrangements, our business, financial
condition and results of operations will be materially adversely affected.

Our dependence on collaborative arrangements with third parties subjects us to a
number of risks. Such collaborative arrangements may not be on terms favorable
to Abgenix. Agreements with collaborative partners typically allow partners
significant discretion in electing whether to pursue any of the planned
activities. We cannot control the amount and timing of resources our
collaborative partners may devote to the product candidates. Our partners may
not perform their obligations as expected. Business combinations or significant
changes in a collaborative partner's business strategy may adversely affect a
partner's willingness or ability to complete its obligations under the
arrangement. Even if we fulfill our obligations under a collaborative agreement,
our partner can terminate the agreement at any time following proper written
notice. If any collaborative partner were to terminate or breach our agreement
with it, or otherwise fail to complete its obligations in a timely manner, our
business, financial condition and results of operations may be materially
adversely affected. If we are not able to establish further collaborative
arrangements or any or all of our existing collaborative arrangements are
terminated, we may be required to seek new collaborative arrangements or to
undertake product development and commercialization at our own expense. Such an
undertaking may:

- -     limit the number of product candidates that we will be able to develop
      and commercialize;

- -     reduce the likelihood of successful product introduction;

- -     significantly increase our capital requirements; and

- -     place additional strain on management's time.

Existing or future collaborative partners may pursue alternative technologies,
including those of our competitors. Disputes may arise with respect to the
ownership of rights to any technology or products developed with any current or
future collaborative partner. Lengthy negotiations with potential new
collaborative partners or disagreements between Abgenix and our collaborative
partners may lead to delays or termination in the research, development or
commercialization of product candidates or result in time consuming and
expensive litigation or arbitration. If our collaborative partners pursue
alternative technologies or fail to develop or commercialize successfully any
product candidate to which they have obtained rights from us, our business,
financial condition and results of operations may be materially adversely
affected.


                                       18
<PAGE>

OUR JOINT VENTURE WITH AKROS PHARMA, INC. MAY LIMIT OUR ABILITY TO DEVELOP
PRODUCT CANDIDATES

In 1991, Cell Genesys and Akros Pharma, Inc., (formerly JT America, Inc.),
formed Xenotech, L.P., an equally-owned joint venture, to develop genetically
modified strains of mice which can produce fully human monoclonal antibodies,
called XenoMouse technology, and to commercialize products generated from
XenoMouse technology. Upon our organization, Cell Genesys assigned its rights in
Xenotech to us.

We must obtain licenses from Xenotech to commercialize antibody products
generated by XenoMouse technology. We have the right to license the use of
XenoMouse technology from Xenotech to develop a certain number of antigen
targets each year. If we have used our yearly allotment of licenses to develop
antigen targets and desire to acquire a license to develop additional antigen
targets, we may have to negotiate with Akros Pharma, Inc. or others to acquire
such rights. Disputes with Akros Pharma, Inc., or its parent company Japan
Tobacco, Inc., may result in the loss of the right to commercialize a product
candidate by either party. Limits on our ability to acquire additional licenses
to develop antigen targets, or disputes with Akros Pharma, Inc. or Japan
Tobacco, Inc. will limit our ability to establish collaborations and fully
realize the commercial potential of XenoMouse technology.

WE FACE INTENSE COMPETITION AND RAPID TECHNOLOGICAL CHANGE

The biotechnology and pharmaceutical industries are highly competitive and
subject to significant and rapid technological change. We are aware of several
pharmaceutical and biotechnology companies that are actively engaged in research
and development in areas related to antibody therapy. These companies have
commenced clinical trials of antibody products or have successfully
commercialized antibody products. Many of these companies are addressing the
same diseases and disease indications as Abgenix or our collaborative partners.
Also, we compete with companies that offer antibody generation services to
companies that have antigens. These competitors have specific expertise or
technology related to antibody development. These companies include GenPharm
International, Inc., a wholly-owned subsidiary of Medarex, Inc., Cambridge
Antibody Technology Group plc, Protein Design Labs, Inc. and MorphoSys AG.

Some of our competitors have received regulatory approval or are developing or
testing product candidates that may compete directly with our product
candidates. Recently, Sangstat Medical Corp. received approval for an organ
transplant rejection product that may compete with ABX-CBL, which is in clinical
trials. We are also aware that several companies, including Genentech, Inc.,
have potential product candidates that may compete with ABX-IL8, which is in
clinical trials. Furthermore, we are aware that ImClone Systems, Inc., Medarex
and OSI Pharmaceuticals, Inc. have potential antibody and small molecule product
candidates already in clinical development that may compete with ABX-EGF, which
is in clinical trials. We may also compete with Japan Tobacco in supplying
XenoMouse technology or antibody product candidates to potential collaborative
partners.

Many of these companies and institutions, either alone or together with their
collaborative partners, have substantially greater financial resources and
larger research and development staffs than we do. In addition, many of these
competitors, either alone or together with their collaborative partners, have
significantly greater experience than we do in:

- -     developing products;

- -     undertaking preclinical testing and human clinical trials;

- -     obtaining FDA and other regulatory approvals of products; and


                                       19
<PAGE>

- -     manufacturing and marketing products.

Accordingly, our competitors may succeed in obtaining patent protection,
receiving FDA approval or commercializing products before us. If we commence
commercial product sales, we will be competing against companies with greater
marketing and manufacturing capabilities, areas in which we have limited or no
experience.

We also face, and will continue to face, competition from academic institutions,
government agencies and research institutions. There are numerous competitors
working on products to treat each of the diseases for which we are seeking to
develop therapeutic products. In addition, any product candidate that we
successfully develop may compete with existing therapies that have long
histories of safe and effective use. Competition may also arise from:

- -     other drug development technologies and methods of preventing or reducing
      the incidence of disease;

- -     new small molecules; or

- -     other classes of therapeutic agents.

Developments by competitors may render our product candidates or technologies
obsolete or noncompetitive. We face and will continue to face intense
competition from other companies for collaborative arrangements with
pharmaceutical and biotechnology companies for establishing relationships with
academic and research institutions, and for licenses to proprietary technology.
These competitors, either alone or with their collaborative partners, may
succeed in developing technologies or products that are more effective than
ours.

MARKET ACCEPTANCE OF OUR PRODUCTS IS UNCERTAIN

Our product candidates may not gain market acceptance among physicians,
patients, healthcare payors and the medical community. We may not achieve market
acceptance even if clinical trials demonstrate safety and efficacy, and the
necessary regulatory and reimbursement approvals are obtained. The degree of
market acceptance of any product candidates that we develop will depend on a
number of factors, including:

- -     establishment and demonstration of clinical efficacy and safety;

- -     cost-effectiveness of our product candidates;

- -     their potential advantage over alternative treatment methods;

- -     reimbursement policies of government and third-party payors; and

- -     marketing and distribution support for our product candidates.

Physicians will not recommend therapies using our products until such time as
clinical data or other factors demonstrate the safety and efficacy of such
procedures as compared to conventional drug and other treatments. Even if the
clinical safety and efficacy of therapies using our antibody products is
established, physicians may elect not to recommend the therapies for any number
of other reasons, including whether the mode of administration of our antibody
products is effective for certain indications. For example, antibody products
are typically administered by infusion or injection, which requires substantial
cost and inconvenience to patients. Our product candidates, if successfully
developed, will compete with a number of drugs and therapies manufactured and
marketed by major pharmaceutical and other biotechnology companies.


                                       20
<PAGE>

Our products may also compete with new products currently under development
by others. Physicians, patients, third-party payors and the medical community
may not accept and utilize any product candidates that Abgenix or our
collaborative partners develop. If our products do not achieve significant
market acceptance, our business, financial condition and results of
operations will be materially adversely affected.

OUR PATENT POSITION IS UNCERTAIN AND OUR SUCCESS DEPENDS ON OUR PROPRIETARY
RIGHTS

Our success depends in part on our ability to:

- -     obtain patents;

- -     protect trade secrets;

- -     operate without infringing upon the proprietary rights of others; and

- -     prevent others from infringing on our proprietary rights.

We will be able to protect our proprietary rights from unauthorized use by third
parties only to the extent that our proprietary rights are covered by valid and
enforceable patents or are effectively maintained as trade secrets. While we
have pending patent applications in the United States relating to XenoMouse
technology, no patents have been issued. We try to protect our proprietary
position by filing United States and foreign patent applications related to our
proprietary technology, inventions and improvements that are important to the
development of our business. The patent position of biopharmaceutical companies
involves complex legal and factual questions and, therefore, enforceability
cannot be predicted with certainty. Patents, if issued, may be challenged,
invalidated or circumvented. Thus, any patents that we own or license from third
parties may not provide any protection against competitors. Our pending patent
applications, those we may file in the future, or those we may license from
third parties, may not result in patents being issued. Also, patent rights may
not provide us with proprietary protection or competitive advantages against
competitors with similar technology. Furthermore, others may independently
develop similar technologies or duplicate any technology that we have developed.
The laws of certain foreign countries do not protect our intellectual property
rights to the same extent as do the laws of the United States.

In addition to patents, we rely on trade secrets and proprietary know-how. We
seek protection, in part, through confidentiality and proprietary information
agreements. These agreements may not provide meaningful protection or adequate
remedies for our technology in the event of unauthorized use or disclosure of
confidential and proprietary information. The parties may breach such
agreements. Furthermore, our trade secrets may otherwise become known to, or be
independently developed by, our competitors.

WE MAY FACE CHALLENGES FROM THIRD PARTIES REGARDING THE VALIDITY OF OUR PATENTS
AND PROPRIETARY RIGHTS

Research has been conducted for many years in the antibody field. This has
resulted in a substantial number of issued patents and an even larger number
of patent applications. Patent applications in the United States are, in most
cases, maintained in secrecy until patents issue. The publication of
discoveries in the scientific or patent literature frequently occurs
substantially later than the date on which the underlying discoveries were
made. Our commercial success depends significantly on our ability to operate
without infringing the patents and other proprietary rights of third parties.
Our technologies may infringe the patents or violate other proprietary rights
of third parties. In the event of infringement or violation, Abgenix and our
collaborative partners may be prevented from pursuing product development or
commercialization. Such a result will materially adversely affect our
business, financial condition and results of operations.


                                       21
<PAGE>

In March 1997, we entered into a cross-license and settlement agreement with
GenPharm to avoid protracted litigation. Under the cross-license, we licensed on
a non-exclusive basis certain patents, patent applications, third-party
licenses, and inventions pertaining to the development and use of certain
transgenic rodents including mice that produce fully human antibodies that are
integral to our products and business. Our business, financial condition and
results of operations will be materially adversely affected if any of the
parties breaches the cross-license agreement. We have one issued European patent
relating to XenoMouse technology that is currently undergoing opposition
proceedings within the European Patent Office and the outcome of this opposition
is uncertain.

The biotechnology and pharmaceutical industries have been characterized by
extensive litigation regarding patents and other intellectual property rights.
The defense and prosecution of intellectual property suits, United States Patent
and Trademark Office interference proceedings and related legal and
administrative proceedings in the United States and internationally involve
complex legal and factual questions. As a result, such proceedings are costly
and time-consuming to pursue and their outcome is uncertain. Litigation may be
necessary to:

- -     enforce our issued and licensed patents;

- -     protect trade secrets or know-how that we own or license; or

- -     determine the enforceability, scope and validity of the proprietary
      rights of others.

If we become involved in any litigation, interference or other administrative
proceedings, we will incur substantial expense and the efforts of our technical
and management personnel will be significantly diverted. An adverse
determination may subject us to significant liabilities or require us to seek
licenses that may not be available from third parties. We may be restricted or
prevented from manufacturing and selling our products, if any, in the event of
an adverse determination in a judicial or administrative proceeding or if we
fail to obtain necessary licenses. Costs associated with these arrangements may
be substantial and may include ongoing royalties. Furthermore, we may not be
able to obtain the necessary licenses on satisfactory terms, if at all. These
outcomes will materially adversely affect our business, financial condition and
results of operations.

WE ARE SUBJECT TO EXTENSIVE GOVERNMENT REGULATIONS AND WE MAY NOT BE ABLE TO
OBTAIN REGULATORY APPROVALS

Our product candidates under development are subject to extensive and rigorous
domestic government regulation. The FDA regulates, among other things, the
development, testing, manufacture, safety, efficacy, record-keeping, labeling,
storage, approval, advertising, promotion, sale and distribution of
biopharmaceutical products. If our products are marketed abroad, they also are
subject to extensive regulation by foreign governments. None of our product
candidates has been approved for sale in the United States or any foreign
market. The regulatory review and approval process, which includes preclinical
studies and clinical trials of each product candidate, is lengthy, expensive and
uncertain. Securing FDA approval requires the submission of extensive
preclinical and clinical data and supporting information to the FDA for each
indication to establish the product candidates safety and efficacy. For example,
we have not received FDA approval to commence a registration clinical trial for
ABX-CBL. The approval process takes many years, requires the


                                       22
<PAGE>

expenditure of substantial resources, involves post-marketing surveillance,
and may involve ongoing requirements for post-marketing studies. Delays in
obtaining regulatory approvals may:

- -     adversely affect the successful commercialization of any drugs that
      Abgenix or our collaborative partners develop;

- -     impose costly procedures on Abgenix or our collaborative partners;

- -     diminish any competitive advantages that Abgenix or our collaborative
      partners may attain; and

- -     adversely affect our receipt of revenues or royalties.

Certain material changes to an approved product such as manufacturing changes or
additional labeling claims are subject to further FDA review and approval. Any
required approvals, once obtained, may be withdrawn. Compliance with other
regulatory requirements may not be maintained. Further, if we fail to comply
with applicable FDA and other regulatory requirements at any stage during the
regulatory process, Abgenix or our contract manufacturers may be subject to
sanctions, including:

- -     delays;

- -     warning letters;

- -     fines;

- -     product recalls or seizures;

- -     injunctions;

- -     refusal of the FDA to review pending market approval applications or
      supplements to approval applications;

- -     total or partial suspension of production;

- -     civil penalties;

- -     withdrawals of previously approved marketing applications; and

- -     criminal prosecutions.

We expect to rely on our collaborative partners to file investigational new drug
applications and generally direct the regulatory approval process for many of
our products. Our collaborative partners may not be able to conduct clinical
testing or obtain necessary approvals from the FDA or other regulatory
authorities for any product candidates. If we fail to obtain required
governmental approvals, our collaborative partners will experience delays in or
be precluded from marketing products developed through our research. In
addition, the commercial use of our products will be limited. Delays and
limitations may materially adversely affect our business, financial condition
and results of operations.

Abgenix and our contract manufacturers also are required to comply with the
applicable FDA current good manufacturing practice regulations. Good
manufacturing practice regulations include requirements relating to


                                       23
<PAGE>

quality control and quality assurance as well as the corresponding
maintenance of records and documentation. Manufacturing facilities are
subject to inspection by the FDA. Such facilities must be approved before we
can use them in commercial manufacturing of our products. Abgenix or our
contract manufacturers may not be able to comply with the applicable good
manufacturing practice requirements and other FDA regulatory requirements. If
Abgenix or our contract manufacturers fails to comply, our business,
financial condition and results of operations will be materially adversely
affected.

WE RELY ON A SOLE SOURCE THIRD-PARTY MANUFACTURER AND DO NOT HAVE COMMERCIAL
SCALE MANUFACTURING EXPERIENCE

We lack the resources and capability to manufacture our products on a commercial
scale. We currently manufacture only limited quantities of antibody products for
preclinical testing. While we maintain a limited inventory of antibody products,
we depend on a sole source contract manufacturer to produce ABX-CBL, ABX-IL8 and
ABX-EGF under good manufacturing practice regulations for use in our clinical
trials. Our contract manufacturer has a limited number of facilities in which
our product candidates can be produced. Our contract manufacturer has limited
experience in manufacturing ABX-CBL, ABX-IL8 and ABX-EGF in quantities
sufficient for conducting clinical trials or for commercialization.

There are, on a worldwide basis, a limited number of contract facilities in
which our product candidates can be produced under good manufacturing practice
regulations for use in pharmaceutical drugs. It can also take a substantial
period of time for a contract facility to begin producing antibodies under good
manufacturing practice regulations. Accordingly, we depend on our contract
manufacturer to produce our product candidates under good manufacturing practice
regulations which meet acceptable standards for our clinical trials.

Contract manufacturers often encounter difficulties in scaling up production,
including problems involving production yields, quality control and quality
assurance and shortage of qualified personnel. Our contract manufacturer may not
perform as agreed or may not remain in the contract manufacturing business for
the time required by us to successfully produce and market our product
candidates. If our contract manufacturer fails to deliver the required
quantities of our product candidates for clinical use on a timely basis and at
commercially reasonable prices, and we fail to find a replacement manufacturer
or develop our own manufacturing capabilities, our business, financial condition
and results of operations will be materially adversely affected.

In addition, Abgenix and our third-party manufacturer are required to register
manufacturing facilities with the FDA and foreign regulatory authorities. The
facilities will then be subject to inspections confirming compliance with good
manufacturing practice requirements established by the FDA or corresponding
foreign regulations. If Abgenix or our third-party manufacturer fails to
maintain compliance with the good manufacturing practice requirements, our
business, financial condition and results of operations will be materially
adversely affected.

WE DO NOT HAVE MARKETING AND SALES EXPERIENCE

We do not have a marketing, sales or distribution capability. For certain
products, we may establish an internal marketing and sales force. We intend to
enter into arrangements with third parties to market and sell most of our
products. We may not be able to enter into marketing and sales arrangements with
others on acceptable terms, if at all. To the extent that we enter into
marketing and sales arrangements with other companies, our revenues, if any,
will depend on the efforts of others. These efforts may not be successful. If we
are unable to enter into third-party arrangements, then we must develop a
marketing and sales force, which may need to be substantial in size, in order to
achieve commercial success for any product candidate approved


                                       24
<PAGE>

by the FDA. We may not successfully develop marketing and sales experience or
have sufficient resources to do so. If we do develop such capabilities, we
will compete with other companies that have experienced and well-funded
marketing and sales operations. If we fail to establish successful marketing
and sales capabilities or fail to enter into successful marketing
arrangements with third parties, our business, financial condition and
results of operations will be materially adversely affected.

WE DEPEND ON KEY PERSONNEL AND MUST CONTINUE TO ATTRACT AND RETAIN KEY EMPLOYEES
AND CONSULTANTS

We are highly dependent on the principal members of our scientific and
management staff. If we lose any of these persons, our business, financial
condition and results of operations may be materially adversely affected. For us
to pursue product development, marketing and commercialization plans, we will
need to hire additional qualified scientific personnel to perform research and
development. We will also need to hire personnel with expertise in clinical
testing, government regulation, manufacturing, marketing and finance. Attracting
and retaining qualified personnel will be critical to our success. We may not be
able to attract and retain personnel on acceptable terms given the competition
for such personnel among biotechnology, pharmaceutical and healthcare companies,
universities and non-profit research institutions.

In addition, we rely on members of our Scientific and Medical Advisory Boards
and other consultants to assist us in formulating our research and development
strategy. All of our consultants and the members of our Scientific and Medical
Advisory Boards are employed by other entities. They may have commitments to, or
advisory or consulting agreements with, other entities that may limit their
availability to us. If we lose the services of these personnel, the achievement
of our development objectives may be impeded. Such impediments may materially
adversely affect our business, financial condition and results of operations.

DIRECTORS, EXECUTIVE OFFICERS, PRINCIPAL STOCKHOLDERS AND AFFILIATED ENTITIES
OWN A SIGNIFICANT PERCENTAGE OF OUR CAPITAL STOCK

Our directors, executive officers, principal stockholders and affiliated
entities beneficially own, in the aggregate, approximately 28.5% of our
outstanding common stock as of June 30, 1999. These stockholders, if acting
together, will be able to significantly influence all matters requiring approval
by our stockholders. Such matters include the election of directors and the
approval of mergers or other business combination transactions. We may be
adversely impacted by the control that such stockholders will have with respect
to matters affecting us.

WE MAY REQUIRE ADDITIONAL FINANCING

We will continue to expend substantial resources for the expansion of research
and development, including costs associated with conducting preclinical testing
and clinical trials. We will be required to expend substantial funds in the
course of completing required additional development, preclinical testing and
clinical trials of and regulatory approval for product candidates. Our future
liquidity and capital requirements will depend on many factors, including:

- -     the scope and results of preclinical testing and clinical trials;

- -     the retention of existing and establishment of further collaborative
      arrangements, if any;

- -     continued scientific progress in our research and development programs;


                                       25
<PAGE>

- -     the size and complexity of these programs;

- -     the time and expense involved in obtaining regulatory approvals, if any;

- -     competing technological and market developments;

- -     the time and expense of filing and prosecuting patent applications and
      enforcing patent claims;

- -     the cost of establishing manufacturing capabilities, conducting
      commercialization activities and arrangements and product in-licensing;
      and

- -     other factors not within our control.

We believe that our current cash balances, cash equivalents, short-term
investments and cash generated from our collaborative arrangements will be
sufficient to meet our operating and capital requirements for at least the next
two years. However, we may need additional financing within this timeframe. We
may need to raise additional funds through public or private financing,
collaborative arrangements or other arrangements. Additional funding may not be
available to us on favorable terms, if at all. Furthermore, any additional
equity financing may be dilutive to stockholders, and debt financing, if
available, may involve restrictive covenants. Collaborative arrangements may
require us to relinquish our rights to certain of our technologies, product
candidates or marketing territories. If we fail to raise additional funds when
needed, our business, financial condition and results of operations will be
materially adversely affected.

CELL GENESYS EXERCISES SIGNIFICANT INFLUENCE OVER US

As of June 30, 1999 Cell Genesys beneficially owns approximately 22.5% of our
outstanding capital stock.  As a result, Cell Genesys will have significant
influence over all matters requiring the approval of our stockholders. Such
matters include the election of our Board of Directors and changes in control of
Abgenix. We have entered into a governance agreement with Cell Genesys which
provides that so long as Cell Genesys or a group to which it belongs owns a
specific percentage of our outstanding voting stock, Cell Genesys or the group
shall have the right to nominate a fixed number of directors to serve on our
Board. The details of this arrangement are set forth in the table below:

<TABLE>
<CAPTION>
                                                         NUMBER OF
              PERCENTAGE OWNERSHIP                       DIRECTORS
              --------------------                       ---------
             <S>                                        <C>
              50% or more                                4 out of 7
              Less than 50% but greater than 25%         3 out of 7
              Less than 25% but greater than 15%         1 out of 7
</TABLE>

The governance agreement also provides that Cell Genesys and each of our
officers and directors who owns voting stock shall agree to vote for the persons
nominated as set forth above. We may be adversely impacted by the significant
influence which Cell Genesys will have with respect to matters affecting us.

WE FACE UNCERTAINTY OVER REIMBURSEMENT AND HEALTHCARE REFORM

In both domestic and foreign markets, sales of our product candidates will
depend in part upon the availability of reimbursement from third-party payors.
Such third-party payors include government health administration authorities,
managed care providers, private health insurers and other organizations. These
third-party payors are increasingly challenging the price and examining the cost
effectiveness of medical products and services.


                                       26
<PAGE>

In addition, significant uncertainty exists as to the reimbursement status of
newly approved healthcare products. We may need to conduct post-marketing
studies in order to demonstrate the cost-effectiveness of our products. Such
studies may require us to provide a significant amount of resources. Our
product candidates may not be considered cost-effective. Adequate third-party
reimbursement may not be available to enable us to maintain price levels
sufficient to realize an appropriate return on our investment in product
development. Domestic and foreign governments continue to propose and pass
legislation designed to reduce the cost of healthcare. Accordingly,
legislation and regulations affecting the pricing of pharmaceuticals may
change before our proposed products are approved for marketing. Adoption of
such legislation could further limit reimbursement for pharmaceuticals. If
the government and third-party payors fail to provide adequate coverage and
reimbursement rates for our product candidates, the market acceptance of our
products may be adversely affected. If our products do not receive market
acceptance, our business, financial condition and results of operations will
be materially adversely affected.

WE FACE PRODUCT LIABILITY RISKS AND MAY NOT BE ABLE TO OBTAIN ADEQUATE INSURANCE

The use of any of our product candidates in clinical trials, and the sale of any
approved products, may expose us to liability claims resulting from such use or
sale of our products. These claims might be made directly by consumers,
healthcare providers or by pharmaceutical companies or others selling such
products. We may experience financial losses in the future due to product
liability claims. We have obtained limited product liability insurance coverage
for our clinical trials. Our insurance coverage limits are $5.0 million per
occurrence and $5.0 million in the aggregate. We intend to expand our insurance
coverage to include the sale of commercial products if marketing approval is
obtained for product candidates in development. However, insurance coverage is
becoming increasingly expensive. We may not be able to maintain insurance
coverage at a reasonable cost or in sufficient amounts to protect us against
losses. If a successful product liability claim or series of claims is brought
against us for uninsured liabilities or in excess of insured liabilities, our
business, financial condition and results of operations may be materially
adversely affected.

OUR OPERATIONS INVOLVE HAZARDOUS MATERIALS

Our research and manufacturing activities involve the controlled use of
hazardous materials. We cannot eliminate the risk of accidental contamination or
injury from these materials. In the event of an accident or environmental
discharge, we may be held liable for any resulting damages, which may exceed our
financial resources and may materially adversely affect our business, financial
condition and results of operations.

OUR STOCK PRICE IS HIGHLY VOLATILE

The market price of our common stock has been highly volatile and is likely to
continue to be volatile. Factors affecting our stock price include:

- -     fluctuations in our operating results;

- -     announcements of technological innovations or new commercial therapeutic
      products by us or our competitors;

- -     published reports by securities analysts;

- -     progress with clinical trials;

- -     governmental regulation;


                                       27
<PAGE>

- -     changes in reimbursement policies;

- -     developments in patent or other proprietary rights;

- -     developments in our relationship with collaborative partners;

- -     public concern as to the safety and efficacy of our products; and

- -     general market conditions.

WE ARE SUBJECT TO ANTI-TAKEOVER PROVISIONS AND WE HAVE IMPLEMENTED A
STOCKHOLDERS RIGHTS PLAN

In June 1999, our Board of Directors adopted a Stockholder Rights Plan. The
Stockholder Rights Plan provides for a dividend distribution of one Preferred
Shares Purchase Right on each outstanding share of our common stock. Each Right
entitles stockholders to buy 1/1000th of a share of our Series A participating
preferred stock at an exercise price of $120.00. Each Right will become
exercisable following the tenth day after a person or group announces
acquisition of 15 percent or more of our common stock, or announces commencement
of a tender offer, the consummation of which would result in ownership by the
person or group of 15 percent or more of our common stock. In the case of Cell
Genesys, which beneficially owns approximately 22.5% of our outstanding capital
stock as of June 30, 1999, each right will become exercisable following the
tenth day after it announces the acquisition of 25 percent or more of our common
stock, or announces commencement of a tender offer, the consummation of which
would result in ownership by Cell Genesys of 25 percent or more of our common
stock. We will be entitled to redeem the Rights at $0.01 per Right at any time
on or before the tenth day following acquisition by a person or group of 15
percent or more (or in the case of Cell Genesys, 25 percent or more) of our
common stock.

The Stockholder Rights Plan and certain provisions of our Amended and Restated
Certificate of Incorporation and Amended and Restated Bylaws may have the effect
of making it more difficult for a third party to acquire, or of discouraging a
third party from attempting to acquire control of Abgenix. This could limit the
price that certain investors might be willing to pay in the future for our
shares of common stock. Certain provisions of our Amended and Restated
Certificate of Incorporation and Amended and Restated Bylaws allow Abgenix to
issue preferred stock without any vote or further action by the stockholders,
eliminate the right of stockholders to act by written consent without a meeting,
specify procedures for director nominations by stockholders and submission of
other proposals for consideration at stockholder meetings, and eliminate
cumulative voting in the election of directors. We are subject to certain
provisions of Delaware law that could also delay or make more difficult a
merger, tender offer or proxy contest involving Abgenix. In particular, Section
203 of the Delaware General Corporation Law prohibits a Delaware corporation
from engaging in any business combination with any interested stockholder for a
period of three years unless certain conditions are met. The Stockholder Rights
Plan, the possible issuance of preferred stock, the procedures required for
director nominations and stockholder proposals and Delaware law could have the
effect of delaying, deferring or preventing a change in control of Abgenix,
including without limitation, discouraging a proxy contest or making more
difficult the acquisition of a substantial block of our common stock. The
provisions could also limit the price that investors might be willing to pay in
the future for shares of our common stock.


                                       28
<PAGE>

WE DO NOT INTEND TO PAY DIVIDENDS

We intend to retain any future earnings to finance the growth and development of
our business and we do not plan to pay cash dividends in the foreseeable future.

WE FACE UNCERTAINTY WITH YEAR 2000 COMPLIANCE

The Year 2000 Issue is the result of computer programs being written using two
digits rather than four to define the applicable year. Any of our computer
programs or hardware that have date-sensitive software or embedded chips may
recognize a date using "00" as the year 1900 rather than the year 2000. This may
result in a system failure or miscalculations causing disruptions of operations,
including, among other things, a temporary inability to receive supplies from
our venders, or operate our accounting and other internal systems. If our
software vendors are unable to address the Year 2000 compliance of their
products, or should our suppliers' operations be disrupted by the Year 2000
Issue, then our ability to serve collaborative partners and develop products may
be materially adversely affected. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations."

PART II

      ITEM 1 - LEGAL PROCEEDINGS

      Not applicable.

      ITEM 2 - CHANGES IN SECURITIES AND USE OF PROCEEDS

      USE OF PROCEEDS

      In July 1998, we closed an initial public offering of 2,875,000 shares of
      our common stock at a per share price of $8.00 pursuant to a Registration
      Statement on Form S-1 (Registration No. 333-49415), which was declared
      effective on July 2, 1998.  The managing underwriters for our offering
      were BancAmerica Robertson Stephens (now BancBoston Robertson Stephens
      Inc.) and Lehman Brothers Inc.  Of the $23,000,000 in gross proceeds
      raised in connection with the offering, (i) $1,610,000 was paid to the
      managing underwriters in connection with underwriting discounts and (ii)
      approximately $1,359,000 was paid by us in connection with expenses,
      including legal, printing and filing fees, in connection with the
      offering.  Of the remaining net proceeds, we have paid $3,750,000
      pursuant to the cross-license and settlement with GenPharm and through
      the twelve month period ended June 30, 1999, approximately $18.5 million
      of the net proceeds have been spent on research and development
      activities.  There were no direct or indirect payments to any of our
      directors or officers or to any other person or entity.   No material
      amount of the proceeds from the offering have been used for the
      construction of plant, building or facility or installation of machinery
      or equipment, or the purchases of real estate or the acquisition of other
      businesses.  We are currently investing the remaining net proceeds from
      the offering for future use as additional working capital.  Such
      remaining net proceeds have been invested in highly liquid instruments,
      such as commercial paper and U.S Government obligations, with an average
      maturity of fifteen months or less.  A portion of those net proceeds may
      be used for the acquisition of businesses, products and technologies that
      are complimentary to those of Abgenix.


                                       29
<PAGE>

      RECENT SALES OF UNREGISTERED SECURITIES

      Not applicable

      ITEM 3 - DEFAULTS UPON SENIOR SECURITIES

      Not applicable

      ITEM 4 - SUBMISSION OF MATTERS TO VOTE OF SECURITY HOLDERS


      At our Annual Meeting of Stockholders, held on June 2, 1999, two matters
      were voted upon. A description of each matter and tabulation of votes
      follows:

          1.   Election of Directors:

<TABLE>
<CAPTION>
                                                             Votes
                                           -----------------------------------------
                  Nominee                         For                    Withheld
          --------------------------       -------------------   -------------------
<S>                                       <C>                    <C>
          R. Scott Greer                       9,773,759                    175
          Stephen A. Sherwin                   9,767,702                  6,232
          M. Kathleen Behrens                  9,773,749                    175
          Mark B. Logan                        9,773,749                    175
          Joseph E. Maroun                     9,773,759                    175
</TABLE>

          There were no abstentions or broker nonvotes.



          2.   Ratification of Ernst & Young, LLP as our independent auditors
               for the 1999 fiscal year ending December 31, 1999:

<TABLE>
<CAPTION>
                                              Votes
                 ----------------------------------------------------------------
                    For                       Against                     Abstain
                 ---------                  ----------                  ---------
<S>                                        <C>                         <C>
                 9,771,934                     1,200                        800
</TABLE>

          There were no broker nonvotes.


      ITEM 5 - OTHER INFORMATION

      Not applicable.


                                       30
<PAGE>

ITEM 6 - EXHIBITS AND REPORTS ON FORM 8-K

(a) Exhibits

<TABLE>
<CAPTION>
   Exhibit No.                     Caption
   -----------                     -------
   <S>         <C>
      10.1 (1) Preferred Shares Rights Agreement, dated as of June 14,
               1999, between Abgenix, Inc. and ChaseMellon Shareholder
               Services, L.L.C., including the Certificate of
               Determination, the form of Rights Certificate and the
               Summary of Rights Certificate and the Summary of Rights
               attached thereto as EXHIBITS A, B and C, respectively

          27.1 Financial Data Schedule
</TABLE>

- ---------------
      (1)Incorporated by reference to the same numbered exhibit previously
      filed with Abgenix's Registration Statement on Form 8-A (Registration No.
      000-24207).



(b)   Reports on Form 8-K

      No reports on Form 8-K were filed with the Securities and Exchange
      Commission during the second quarter of fiscal 1999.


                                       31
<PAGE>

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.

Dated:  August 13, 1999.

                              ABGENIX, INC.
                              (Registrant)


                                /s/   R. Scott Greer
                              -------------------------------------------
                              R. Scott Greer
                              President and Chief Executive Officer
                              (Principal Executive Officer)



                                /s/   Kurt Leutzinger
                              -------------------------------------------
                              Kurt Leutzinger
                              Vice President and Chief Financial Officer
                              (Principal Financial and Accounting Officer)


                                       32
<PAGE>

                                  INDEX TO EXHIBITS


EXHIBITS
- --------

27.1  Financial Data Schedule


                                       33

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED BALANCE SHEETS AND THE STATEMENTS OF OPERATIONS AS OF AND FOR THE
THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 1999 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             APR-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                           3,010
<SECURITIES>                                    58,608
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                63,955
<PP&E>                                           7,643
<DEPRECIATION>                                   2,533
<TOTAL-ASSETS>                                  70,198
<CURRENT-LIABILITIES>                            7,371
<BONDS>                                          1,308
                                0
                                          0
<COMMON>                                       108,726
<OTHER-SE>                                      47,207
<TOTAL-LIABILITY-AND-EQUITY>                    70,198
<SALES>                                              0
<TOTAL-REVENUES>                                 1,720
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                 5,974
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 111
<INCOME-PRETAX>                                (3,568)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (3,568)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (3,568)
<EPS-BASIC>                                     (0.24)
<EPS-DILUTED>                                   (0.24)


</TABLE>


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