Exhibit 99.1

FOR IMMEDIATE RELEASE
Contact: Ami Knoefler
Director, Corporate Communications
(510) 284-6350
ABGENIX ANNOUNCES SECOND QUARTER 2003
FINANCIAL RESULTS
FREMONT, Calif., July 22, 2003 – Abgenix, Inc. (NASDAQ: ABGX) today reported financial results for the second quarter ended June 30, 2003.
For the quarter ended June 30, 2003, the company reported a net loss of $66.7 million or $0.76 per share, compared to a net loss of $79.7 million or $0.92 per share for the same period in 2002. The net loss for the second quarter of 2003 included a charge of $28 million resulting from Abgenix’s negotiated cancellation of a November 2000 agreement with Lonza Biologics for the use of one of its manufacturing facilities, which Abgenix no longer needs. The net loss for the second quarter of 2002 included impairment charges of $37.5 million for unrealized losses on investments in common stock related to various collaborations.
Contract revenues for the second quarter were $2.4 million, compared with $2.5 million for the same quarter in 2002. Including interest income, total revenues for the second quarter were $5.1 million, compared with $7.6 million for the same period in 2002. Contract revenues for the quarter primarily included license fees and milestone payments from customers and collaborators. Such revenues typically depend on the timing of certain events and vary from quarter to quarter.
Expenses for the second quarter of 2003 were $71.8 million, compared with $87.3 million for the same quarter in 2002. Second quarter 2003 expenses included $41 million in costs of starting up the company’s antibody production facilities. These start-up costs included the $28 million cancellation fee, which Abgenix will pay to Lonza in four equal quarterly installments, to eliminate Abgenix’s commitment to pay approximately $46 million in total monthly fees through August 2006.
Net cash used in operating activities in the second quarter of 2003 was $28.9 million.
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Abgenix ended the second quarter with approximately $307.4 million in cash, cash equivalents and marketable securities. In addition, Abgenix holds long-term investments, primarily equity in corporate collaborators, valued at $23.4 million.
“During the second quarter, we advanced several key collaborations and continued to deliver on our strategy of being the partner of choice in discovering, developing and commercializing monoclonal antibodies,” said Ray Withy, Ph.D., president and chief executive officer of Abgenix. “We are also extremely encouraged by the interim phase 2 data for ABX-EGF, and are working closely with Amgen to move the clinical development program forward as efficiently as possible.”
Recent company highlights include:
• Announcing a milestone payment resulting from the filing of an IND by Pfizer to begin clinical trials with a second antibody licensed from Abgenix as part of an ongoing research alliance with Pfizer to generate fully human antibodies for various diseases.
• Presenting interim phase 2 results of ABX-EGF in advanced colorectal cancer at the 39th annual meeting of the American Society of Clinical Oncology. Results from the multi-center study showed that 4 of 40 efficacy evaluable patients with metastatic colorectal cancer experienced partial responses and 22 of 40 had stable disease after 8 weeks.
• Advancing an ongoing collaboration with Human Genome Sciences, which has acquired a commercial license to develop and commercialize a XenoMouseâ generated antibody to a key HIV receptor, the chemokine receptor CCR5.
• Forming an alliance with Microscience, a biotechnology company based in the UK, to develop, discover and commercialize monoclonal antibodies against certain infectious diseases.
Conference Call Information
Abgenix will hold a conference call today at 4:30 pm ET, 1:30 pm PT to discuss financial results. To participate in the teleconference, please dial 800-901-5241 fifteen minutes before the conference begins. International callers should dial 617-786-2963. The pass code is 57137266. The call will also be webcast live at www.abgenix.com. A replay of the call will be available until August 5, 2003, on the company’s website, or by dialing 888-286-8010. International callers should dial 617-801-6888. The replay participant code is 43525625.
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About Abgenix
Abgenix is a biopharmaceutical company focused on the discovery, development and manufacturing of human therapeutic antibodies. The company’s antibody development platform includes a leading technology and state-of-the-art manufacturing capabilities that enable the rapid generation, selection and production of high affinity, fully human antibody product candidates to a variety of disease targets. Abgenix leverages its leadership position in human antibody technology to build a diversified product portfolio through the establishment of collaborations with multiple pharmaceutical and biotechnology companies. For more information on Abgenix, visit the company’s website at www.abgenix.com
Statements made in this press release about Abgenix’s technologies, product development activities, collaborative arrangements and manufacturing activities, other than statements of historical fact, and about its projected financial results, are forward-looking statements and are subject to a number of uncertainties that could cause actual results to differ materially from the statements made, including risks associated with the success of clinical trials, the progress of research and product development programs, product manufacturing, the regulatory approval process, competitive products, future capital requirements and the extent and breadth of Abgenix’s patent portfolio. Please see Abgenix’s public filings with the Securities and Exchange Commission for information about risks that may affect Abgenix.
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CONSOLIDATED STATEMENT OF OPERATIONS DATA
| | Three Months Ended June 30, | | Six Months Ended June 30, | |
(in thousands except per share data) | | 2003 | | 2002 | | 2003 | | 2002 | |
| | (unaudited) | | (unaudited) | |
| | | | | | | | | |
Revenues: | | | | | | | | | |
Contract revenues | | $ | 2,350 | | $ | 2,501 | | $ | 8,506 | | $ | 13,499 | |
Interest and other income | | 2,779 | | 5,121 | | 5,974 | | 10,392 | |
Total revenues | | 5,129 | | 7,622 | | 14,480 | | 23,891 | |
| | | | | | | | | |
Costs and Expenses: | | | | | | | | | |
Research and development | | 20,748 | | 38,940 | | 41,935 | | 67,919 | |
Manufacturing start-up costs | | 41,262 | | — | | 52,845 | | — | |
General and administrative | | 6,504 | | 7,220 | | 13,354 | | 13,927 | |
Amortization of intangible assets | | 1,791 | | 1,815 | | 3,606 | | 3,622 | |
Impairment of investments | | — | | 37,498 | | — | | 72,151 | |
Interest expense | | 1,485 | | 1,858 | | 2,481 | | 2,432 | |
Total costs and expenses | | 71,790 | | 87,331 | | 114,221 | | 160,051 | |
Loss before income tax expense | | $ | (66,661 | ) | $ | (79,709 | ) | $ | (99,741 | ) | $ | (136,160 | ) |
Foreign income tax expense | | — | | — | | 84 | | — | |
Net loss | | $ | (66,661 | ) | $ | (79,709 | ) | $ | (99,825 | ) | $ | (136,160 | ) |
Basic and diluted net loss per share | | $ | (0.76 | ) | $ | (0.92 | ) | $ | (1.14 | ) | $ | (1.57 | ) |
Shares used in computing basic and diluted net loss per share | | 87,873 | | 87,063 | | 87,841 | | 86,983 | |
CONSOLIDATED BALANCE SHEET DATA
(in thousands) | | June 30, 2003 | | December 31, 2002 | |
| | (unaudited) | | * | |
| | | | | |
Cash, cash equivalents and marketable securities | | $ | 307,409 | | $ | 396,549 | |
Other current assets | | 23,403 | | 21,182 | |
Total current assets | | 330,812 | | 417,731 | |
Property and equipment, net | | 258,192 | | 244,419 | |
Long-term investments | | 23,367 | | 20,939 | |
Intangible assets, net | | 122,079 | | 127,129 | |
Deposits & other assets | | 30,026 | | 31,779 | |
Total assets | | $ | 764,476 | | $ | 841,997 | |
Deferred revenue | | $ | 5,092 | | $ | 3,416 | |
Other current liabilities | | 49,787 | | 32,525 | |
Total current liabilities | | 54,879 | | 35,941 | |
Convertible subordinated notes | | 200,000 | | 200,000 | |
Deferred rent | | 5,454 | | 4,417 | |
Stockholders’ equity | | 504,143 | | 601,639 | |
Total liabilities and stockholders’ equity | | $ | 764,476 | | $ | 841,997 | |
* Derived from the December 31, 2002 audited financial statements.
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