- -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 --------------------- FORM 10-K/A --------------------- (Mark One) [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 2002 OR [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO COMMISSION FILE NUMBER: 0-15190 --------------------- OSI PHARMACEUTICALS, INC. (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER) <Table> DELAWARE 13-3159796 (STATE OR OTHER JURISDICTION OF INCORPORATION OR (I.R.S. EMPLOYER IDENTIFICATION NO.) ORGANIZATION) </Table> <Table> 58 SOUTH SERVICE ROAD, MELVILLE, N.Y. 11747 (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE) </Table> REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE (631) 962-2000 SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: <Table> <Caption> TITLE OF EACH CLASS NAME OF EACH EXCHANGE ON WHICH REGISTERED ------------------- ----------------------------------------- NONE NONE </Table> SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: COMMON STOCK, PAR VALUE $.01 PER SHARE, AND SERIES SRPA JUNIOR PARTICIPATING PREFERRED STOCK PURCHASE RIGHTS (TITLE OF CLASS) 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. [X] Yes [ ] No Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [ ] As of March 28, 2002, the aggregate market value of the Registrant's voting stock held by non-affiliates was $1,057,560,516. For purposes of this calculation, shares of common stock held by directors, officers and stockholders whose ownership exceeds five percent of the common stock outstanding at March 28, 2002 were excluded. Exclusion of shares held by any person should not be construed to indicate that the person possesses the power, direct or indirect, to direct or cause the direction of the management or policies of the Registrant, or that the person is controlled by or under common control with the Registrant. Indicate by check mark whether the Registrant is an accelerated filer (as defined in Rule 12b-2 of the Securities Exchange Act of 1934). [X] Yes [ ] No As of November 29, 2002, there were 36,418,319 shares of the Registrant's common stock, par value $.01 per share, outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's definitive proxy statement for its 2003 annual meeting of stockholders are incorporated by reference into Part III of this Form 10-K. This Form 10-K/A is being filed to make certain typographical and formatting changes to the information presented in the Tarceva(TM) Phase II Data Table under the caption "OSI's Approach to Cancer Therapy" in Part I, Item 1, of the report on Form 10-K of OSI Pharmaceuticals, Inc. for the fiscal year ended September 30, 2002, which was filed with the Securities and Exchange Commission on December 12, 2002 (the "Form 10-K"). This Form 10-K/A is also being filed to make certain typographical and grammatical changes in other parts of Part I, Item 1 of the Form 10-K. - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- PART I ITEM 1. BUSINESS We are a leading biotechnology company focused on the discovery, development and commercialization of high-quality oncology products that both extend life and improve the quality-of-life for cancer patients worldwide. We have established a balanced pipeline of oncology drug candidates that includes both next-generation cytotoxic chemotherapy agents and novel mechanism-based, gene-targeted therapies. Our most advanced drug candidate, Tarceva(TM) (erlotinib HC1), is a small molecule inhibitor of the epidermal growth factor receptor, or HER1/EGFR. The protein product of the HER1/EGFR gene is a receptor tyrosine kinase that is over-expressed or mutated in many major solid tumors. We believe HER1/ EGFR inhibitors represent an exciting new class of relatively safe and well tolerated anti-cancer agents that may have utility in treating a wide range of cancer patients. Tarceva(TM) is an oral once-a-day small molecule drug designed to specifically block the activity of the HER1/EGFR protein. Currently, Tarceva(TM) is being developed in an alliance with Genentech, Inc. and Roche. If the drug receives regulatory approval, Genentech will lead the marketing effort in the United States and Roche will market it in the rest of the world. We will receive milestone payments from both Genentech and Roche, an equal profit share from U.S. sales, and royalties on sales outside of the United States. Tarceva(TM) has demonstrated encouraging indications of anti-cancer activity in single-agent, open label Phase II trials in non-small cell lung cancer, head and neck cancer and ovarian cancer. Tarceva(TM) is currently in Phase III clinical trials for non-small cell lung cancer and pancreatic cancer. Behind Tarceva(TM) we have five additional drug candidates in earlier stages of clinical development. Three of these (OSI-211, OSI-7904L and OSI-7836) are next generation cytotoxic chemotherapy agents and the other two (CP-547,632 and CP-724,714) are gene-targeted therapies currently being developed by Pfizer Inc. We own commercial rights to the first three and will receive royalty payments on the latter two if they are successfully commercialized. Our next generation cytotoxic chemotherapy candidates are designed to improve upon currently marketed products in the same drug class. OSI-211 is a liposomal formulation of lurtotecan, a topoisomerase-1 inhibitor, that is being developed to compete with topotecan (Hycamptin(R)). OSI-7904L is a liposomal formulation of a thymidylate synthase inhibitor, GW1843, that is being developed as a potential competitor to 5-Fluorouracil (5-FU) and capecitabine (Xeloda(R)), and OSI-7836 is a nucleoside analog being developed to compete with gemcitabine (Gemzar(R)). OSI-211 is in Phase II clinical trials, and OSI-7904L and OSI-7836 are in Phase I clinical trials. Like Tarceva(TM), the two gene-targeted therapies are receptor tyrosine kinase inhibitors. CP-547,632 is a small molecule targeting the vascular endothelial growth factor receptor, or VEGFR, and CP-724,714 is a small molecule targeting HER2/erbB2. Both agents are currently in Phase I clinical trials. In order to support our clinical pipeline, we have established (through acquisition and internal investment) a high quality oncology clinical development and regulatory affairs capability and a pilot scale chemical manufacturing and process chemistry group. Behind our clinical pipeline we have an extensive, fully integrated small molecule drug discovery organization designed to generate a pipeline of high quality oncology drug candidates to move into clinical development. This research operation has been built upon our historical strengths in high throughput screening, chemical libraries, medicinal and combinational chemistry, and automated drug profiling technology platforms. OUR STRATEGY We believe that Tarceva(TM) has established a corporate presence for us in the oncology field. Our strategy over the last several years has been designed to capitalize upon this presence and to re-orient our business 1 towards becoming a world class oncology organization. To this end, we have raised capital, formed alliances and engaged in merger and acquisition activity with the strategic intent to: - maximize our prospects for successful development and commercialization of Tarceva(TM); - enhance our skill sets and improve the quality of our organization, allowing us to establish a comprehensive array of research, development and business skills necessary for our cancer mission; - divest or exit from our current non-oncology research activities and alliances; - engage in active in-licensing and partnering efforts to add to our cancer pipeline and complement our internal cancer research programs; and - continue to invest in opportunities that will lead to successful growth while aggressively managing the risks inherent in our industry in order to sustain a strong balance sheet through to profitability. As we move forward, we intend to follow through on the following core elements of our strategy: Execution on Tarceva(TM). Together with our partners, Genentech and Roche, we have formulated a comprehensive, global development program for Tarceva(TM). Since the beginning of the alliance, we, with our partners, have collectively initiated numerous clinical trials, four of which are Phase III registration-oriented trials in lung and pancreatic cancers. This registration strategy focuses on the execution of adequate, controlled and well-designed studies to support a worldwide registration program. All four Phase III trials are designed as large-scale, placebo controlled, double-blinded trials with a primary endpoint of survival and several secondary endpoints which include, among others, symptom relief and quality of life. Should these studies prove successful, we have established a goal of achieving profitability within 18 to 24 months of market launch of Tarceva(TM). Focus on Oncology. We intend to focus our business entirely on oncology and continue to build upon our extensive pipeline of oncology product candidates, our strong core of discovery research, and our top-tier oncology clinical development and regulatory affairs group. As our pipeline reaches the commercialization stage, we also intend to establish a full commercial operation, initially in the U.S. market. Although we intend to commercialize selected products independently, we will also continue to engage in marketing partnerships where we believe this will add value to our ability to effectively and competitively commercialize our products. We also intend to complete the divestiture of all remaining non-oncology research programs. In July 2002, we agreed to accelerate the conclusion of the phase-down period of our funded research alliance with Anaderm Research Corporation, a wholly-owned subsidiary of Pfizer, focused on the development of novel treatments for skin and hair conditions. We expect the transfer of all research related to the collaboration to be completed by the beginning of 2003. We are in the process of divesting our diabetes program and certain of our adenosine receptor assets into an entity with the intent that this entity subsequently will be funded by third party investors and will be one in which we will maintain a minority interest. This planned divestiture coupled with steps we took in October 2002 to re-size and re-focus the skill sets of our organization will carry us into 2003 with approximately 425 research, development and business personnel focused entirely on oncology. These steps will allow us to maintain the level of resource commitment we believe is required to achieve our primary goal of building a first-class oncology franchise with a pipeline of clinical and research opportunities anchored around Tarceva(TM). Licensing and Acquiring Oncology Products and Clinical Candidates. In order to effectively manage the risks inherent in pharmaceutical research and development and to complement our internal research efforts, we believe it is essential that we continue to explore licensing and acquisition initiatives designed to add oncology products and clinical candidates to our pipeline in order to further strengthen our growing position in oncology. In December 2001, we acquired Gilead Sciences, Inc.'s entire pipeline of clinical candidates in oncology and certain related intellectual property, as well as Gilead's Boulder, Colorado operations, including clinical research, regulatory affairs and drug development personnel, 2 infrastructure, and facilities. This transaction accelerated our development and commercialization capabilities with the addition of an outstanding and complementary drug development and oncology group, and augmented our pipeline of gene-targeted small molecule therapeutics with several promising next-generation cytotoxic chemotherapy agents currently in clinical development. Under the terms of the transaction, we received exclusive worldwide development and commercialization rights to Gilead's three clinical development candidates in oncology. With a full array of cancer drug discovery and development capabilities and a strong balance sheet, we expect to be well positioned to compete for premier in-licensing and acquisition opportunities. OUR RESEARCH AND DEVELOPMENT PROGRAMS RESEARCH AND DEVELOPMENT PIPELINE The following table summarizes the status of our more advanced oncology product candidates as of November 30, 2002 and identifies any related collaborator. <Table> <Caption> PRODUCT/INDICATION STATUS* DRUG TYPE COLLABORATOR(S) - ------------------ --------- ------------------------- ------------------- Tarceva(TM)/Non Small Cell Lung Cancer Phase III Epidermal Growth Genentech and Roche Tarceva(TM)/Pancreatic Cancer Phase III Factor Receptor Inhibitor Tarceva(TM)/Ovarian, Head and Neck, Phase II (HER1/EGFR) Metastatic Breast and Glioblastoma Multiforme Tarceva(TM)/various-exploratory Phase I OSI-211/Ovarian Cancer Phase II Liposomal Topoisomerase-1 OSI-Owned OSI-211/Small Cell Lung Cancer Phase II Inhibitor OSI-7904L/various-exploratory Phase I Liposomal Thymidylate OSI-Owned Synthase Inhibitor OSI-7836/various-exploratory Phase I Nucleoside Analog OSI-Owned CP-547,632/various-exploratory Phase I Vascular Endothelial Pfizer Growth Factor Receptor (VEGFR) Inhibitor CP-724,714/various-exploratory Phase I HER2/erbB2 Receptor Pfizer Inhibitor </Table> - --------------- (*) Denotes clinical safety and efficacy tests as follows: Phase I - Evaluation of safety in humans. Phase II - Evaluation of safety, dosing, and initial efficacy in humans. Phase III - Evaluation of safety and efficacy in humans. OSI'S APPROACH TO CANCER THERAPY Cancer remains a major unmet healthcare concern with approximately 1.3 million Americans diagnosed with various solid tumors, lymphomas and leukemias every year. In total, it is estimated that the overall direct medical costs for cancer in the United States for 2001 were in excess of $56 billion. The worldwide market for anti-cancer drugs is estimated to be $14 billion in 2002 and is expected to grow as breakthrough products, which offer safer and more effective treatment options based upon an improved understanding of the genetic basis of human cancer, begin to enter the market. Traditionally, development of anti-cancer drugs has resulted in products which generally kill rapidly dividing cells. Although these products, called cytotoxic drugs, are effective in killing rapidly dividing cancer cells, they usually interfere directly and non-selectively with normal processes in the cell associated with DNA replication and cell division. Since these cell division processes occur routinely in healthy tissues, the cytotoxic drugs are severely limited in their utility by their serious side effects, such as disruption of the blood, immune and gastrointestinal systems. These side effects limit the anti-tumor value of these cytotoxic drugs because they can be used only in sub-optimal dosing regimens. 3 We have taken two general approaches in an attempt to improve the available drug treatment options for cancer patients. The first approach involves the development of next-generation cytotoxic agents which present improvements in activity over existing drugs or technological innovations, such as liposomal formulations that are designed to improve targeting of the cytotoxic agent to the tumor, thus reducing the incidence of the harmful side effects usually associated with cytotoxic drugs. The second approach involves the exploitation of our rapidly growing understanding of the genetic basis for cancer in order to develop drugs that directly target the genetic abnormalities present in human cancers or treat their consequences. As these new targeted therapies emerge in clinical testing, they may be used independently, in combination with other targeted drugs or in combination with cytotoxic chemotherapy drugs, in an attempt to maximize the anti-cancer benefit by using so-called drug cocktails. It is our belief that to be a successful oncology franchise, we should be developing both next-generation or improved cytotoxic drugs and targeted therapies in order to provide an array of effective treatment options for the cancer patient. Thus, while our drug discovery research efforts are focused on next-generation gene-targeted therapies, our acquisition of oncology assets from Gilead has complemented our research efforts with a portfolio of novel cytotoxic agents. These assets include OSI-211 and OSI-7904L, which are liposomal formulations of novel agents belonging to two classes of drug (topoisomerase 1 inhibitors and thymidylate synthase inhibitors, respectively), for which products are currently marketed. Our belief is that these liposomal formulations might allow us to achieve improved activity profiles over the existing marketed products. The third of our cytotoxic agents is OSI-7836, which, in pre-clinical testing, has clearly demonstrated anti-tumor activity in a variety of refractory solid tumor xenograft models and is being developed as an alternative to gemcitabine (Gemzar(R)), which is sold in the United States for the treatment of pancreatic cancer and non-small cell lung cancer. Our drug discovery efforts in targeted therapies were for many years conducted in partnership with Pfizer. Tarceva(TM) was jointly discovered as part of this alliance. Pfizer is continuing to develop three other targeted therapies from this alliance (two of which are in clinical development), the funded discovery phase of which concluded in April 2001. These drugs represent the vanguard of a substantial research effort directed toward the discovery and development of these next generation targeted drugs. If Pfizer is successful in commercializing any of these drug candidates, we will receive a royalty from Pfizer on the sales of such drugs. The novel, anti-cancer drugs resulting from our alliance with Pfizer, including Tarceva(TM), specifically target cancer-causing genes, or oncogenes, and processes required for tumor growth such as angiogenesis. Oncogenes are typically growth regulating genes that are either over-expressed or mutated in cancer cells in such a manner that they confer either a significant growth advantage on cancer cells in the body or interrupt the normal process of programmed cell death, or apoptosis, that contributes to the uncontrolled growth associated with cancer. One of the most important of these oncogenes is HER1 or EGFR. HER1/EGFR is part of a family of growth factor receptors (the HER family) that binds to natural protein signals like the epidermal growth factor, or EGF, and transforming growth factor-(LOGO), or TGF-(LOGO), sending growth signals, via the receptor's tyrosine kinase enzyme activity, to the nucleus of the cell controlling growth. In many solid tumors, HER1/EGFR is either over-expressed or mutated, leading to abnormal signaling which is linked to the development of a cancerous mass. HER1/EGFR kinase is over-expressed in a wide range of solid tumors and a significant number of patients diagnosed with cancer each year in the United States have solid tumors that over-express HER1/EGFR. In addition, a frequently occurring mutation of the HER1/EGFR gene called EGFRvIII is found in many tumors. Thus, there is both an urgent medical need and a substantial potential market for effective anti-HER1/EGFR agents. Progress in the field has established HER1/EGFR as a validated target for cancer intervention and small molecule tyrosine kinase inhibitors as promising drug candidates in this area. Antibody products are also under development which target the EGF binding region of the receptor and have demonstrated indications of improved anti-cancer activity when used in conjunction with existing treatment and chemotherapy regimens. We believe these agents are unlikely to effectively inhibit mutated forms of HER1/EGFR. They also require delivery via intravenous infusion and are sometimes difficult and expensive to produce. In contrast to these agents, small molecule inhibitors of the tyrosine kinase activity, such as Tarceva(TM), should be effective against either mutant or over-expressed forms of HER1/EGFR, are convenient 4 once-a-day oral therapies, and are relatively easy and inexpensive to manufacture. In addition, Tarceva(TM) has demonstrated anti-tumor activity when used clinically as a single agent in Phase II clinical trials. TARCEVA(TM) From 1986-2001, the focus of our cancer collaboration with Pfizer was the discovery and development of novel classes of orally active, gene-targeted, small molecule anti-cancer drugs based on oncogenes and tumor suppressor genes and the fundamental mechanisms underlying tumor growth. Today these approaches remain at the core of our in-house discovery efforts. The most prominent and advanced of these programs targets HER1/EGFR. Tarceva(TM), a small molecule anti-cancer agent, is a potent, selective and orally active inhibitor of the receptor tyrosine kinase activity of HER1/EGFR. Tarceva(TM) has demonstrated anti-cancer activity in open-label Phase II trials and is now in Phase III trials for non-small cell lung cancer and pancreatic cancer. We gained full development and marketing rights to Tarceva(TM) in June 2000 when the U.S. Federal Trade Commission ordered Pfizer to divest it to us as a result of an anti-trust finding upon the FTC's review of Pfizer's merger with Warner-Lambert Company. In January 2001, we entered into an alliance with Genentech and Roche for the global co-development and commercialization of Tarceva(TM). Clinical Data. Phase I and Phase II trials on Tarceva(TM) have demonstrated the drug to possess activity as a single agent and to be relatively safe and well-tolerated with manageable side effects, principally, reversible rash and a generally mild diarrhea. The dose limiting side effect in the Phase I trials was diarrhea, which was moderate to severe in three of nine patients in these particular studies involving very sick cancer patients at 200 mg per day. 150 mg per day was established as the maximum tolerated dose in this study. On a 150 mg oral daily dosing regimen, diarrhea is generally mild and is treated effectively (when necessary) with loperamide (over the counter Imodium(R)). Clinical investigators have generally considered the rash, which is common to all anti-HER1/EGFR drugs in development, to be the most common adverse event in the context of this anti-cancer therapy. Some success in treating rash has been observed with antibiotic creams as well as with a variety of other agents. However, we believe that the rash itself may serve to be a useful biomarker of the effective delivery and potential activity of Tarceva(TM). Indeed, in our Phase II trials the survival of patients who developed rash during Tarceva(TM) treatment was significantly higher than those who did not. A subset of patients in Phase I, Phase II and Phase III trials have now received daily doses of Tarceva(TM) for extended periods (one year or more) with generally well-managed side effect profiles. We have now completed Phase II trials for Tarceva(TM) in non-small cell lung cancer, head and neck cancer and ovarian cancer. Patients in these trials had advanced or metastatic cancer and had generally failed standard treatment regimens. We believe these trials are encouraging because they demonstrate objective clinical responses and noteworthy survival data for patients treated with Tarceva(TM) as a single agent. The primary endpoint in these trials was response rate, with stable disease, survival, time to progression and quality-of-life being monitored as secondary endpoints. Updated analysis of data from these Phase II trials showed that rash and rash related disorders were seen in 162 patients, or 79%, of the patients. Mild to moderate rash was seen in 146 of these patients and 16 patients showed severe rash. Diarrhea was experienced by 93, or 45%, of the patients. For 86 patients, the diarrhea was mild to moderate, and seven patients had severe diarrhea. Non-Small Cell Lung Cancer. This trial consisted of 57 non-small cell lung cancer, or NSCLC, patients having tumors that were confirmed to be HER1/EGFR positive and who had failed standard platinum-based chemotherapy. Patients received a daily dose of 150 mg of Tarceva(TM). The results from this trial showed that 51% of the patients had either a response or disease stabilization, 22 of whom demonstrated stable disease, five of whom had a partial response, and two of whom had a complete response. The median survival in this trial was 37 weeks. At 12 months, 40% of the patients were alive, 21% of the patients were alive at 18 months, and 16% of the patients are still alive, as of the last follow-up, over 18-24 months. In this trial, a strong correlation between rash and survival was observed. All seven responders experienced rash, 21 out of 22 patients (95%) with stable disease experienced rash while only 15 out of 28 patients (54%) with progressive disease experienced rash. The median survivals of patients who experienced no rash, grade 1 rash or grade 2/3 rash were 1.5, 8.5 and 19.6 months, respectively. 5 Head and Neck Cancer. This trial had 115 patients with advanced head and neck cancer receiving 150 mg of Tarceva(TM) per day. The results showed that 43% of the patients in the study had either a partial response or stable disease. Five patients had objective partial response while 44 patients demonstrated stable disease. The median survival in this study was 26 weeks with 21% of the patients surviving one year or longer. Ovarian Cancer. The third Phase II trial was in advanced ovarian cancer and reported a response plus stable disease rate of 53% based on 34 evaluable patients. Two patients had a partial response, and 16 patients demonstrated stable disease. The median survival of these patients was 35 weeks with 35% of the patients surviving one year or longer. Other Cancers. Genentech has completed an exploratory Phase II study in advanced metastatic breast cancer. Many of the patients in this study were resistant to Herceptin(R) which is another inhibitor of the HER family signaling pathway. Initial results from this study do not indicate broad-based activity for Tarceva(TM) in this patient population. We anticipate that results from this study will be presented in the near future. The data from the NSCLC, head and neck cancer and ovarian cancer Phase II trials are summarized in the following table: TARCEVA(TM) PHASE II DATA (SINGLE-AGENT SALVAGE STUDIES IN PATIENTS WITH REFRACTORY OR ADVANCED CANCER) <Table> <Caption> NON-SMALL CELL HEAD & NECK OVARIAN LUNG CANCER CANCER CANCER -------------- ----------- -------- Evaluable Patients.............................. 57 115 34 Complete Response (100% tumor reduction)........ 2 -- -- Partial Response (greater than 50% but less than 100% tumor reduction)......................... 5 5 2 Stable Disease (up to 50% tumor reduction or less than 25% tumor increase)................. 22 44 16 Overall Responders (complete response and partial response)............................. 12.3% 4.3% 5.9% Overall Responders and Stable Disease........... 51% 43% 53% Median Survival................................. 37 weeks 26 weeks 35 weeks One Year Survival............................... 40% 21% 35% </Table> - --------------- Data as of November 18, 2002 SIDE EFFECTS (ALL THREE STUDIES) <Table> Rash & Related Disorders.................................... 79% Diarrhea.................................................... 45% </Table> - --------------- Data as of November 18, 2002 Development. Since the inception of our alliance with Genentech and Roche in January 2001, we have implemented a global development strategy for Tarceva(TM) with our partners. This plan was designed to be a broad-based approach in implementing several Phase III trials to result in a registration with the U.S. Food and Drug Administration. These trials include a single agent trial for refractory NSCLC patients as well as combination trials with existing chemotherapy regimens for front-line use in pancreatic cancer and NSCLC. These trials are large, placebo-controlled, double-blind studies designed to demonstrate a survival and symptom improvement/quality-of-life benefit for Tarceva(TM) in either combination or single agent settings. We are also conducting several safety trials to review the effect of Tarceva(TM) in combination with other chemotherapy drugs, and additional Phase II studies are being conducted both independently and in collaboration with the U.S. National Cancer Institute's Cancer Therapy Evaluation Program, or CTEP, in a 6 wide array of tumor types including head and neck, ovarian and glioblastoma multiforme. Under the alliance, the following Phase III trials are being conducted, with the indicated enrollment goals: - An approximately 700 patient Phase III trial in refractory NSCLC. In this trial, Tarceva(TM) is being used as a single agent to treat second/third line NSCLC versus best supportive care of patients as a control group. We have been given fast track status by the FDA for the indication covered by this trial, and patient enrollment is expected to be completed by early 2003. - An approximately 1,000 patient Phase III front-line NSCLC trial comparing Tarceva(TM) used in combination with carboplatin (Paraplatin(R)) and paclitaxel (Taxol(R)), the standard of care in the United States, versus chemotherapy alone. This indication was given fast track status by the FDA and patient enrollment was completed in July 2002. - An approximately 1,200 patient Phase III front-line NSCLC trial comparing Tarceva(TM) used in combination with gemcitabine (Gemzar(R)) and cisplatin (Platinol(R)), a commonly used treatment regimen in Europe, versus chemotherapy alone. Enrollment in this trial was completed in September 2002. - A Phase III front-line pancreatic trial comparing Tarceva(TM) used in combination with gemcitabine (Gemzar(R)) versus chemotherapy alone. Patient enrollment is expected to be completed by spring 2003. These Phase III trials are large scale, placebo controlled registration orientated trials. Improvement in patient survival is the primary endpoint in all of these studies with symptom improvement and quality-of-life as key secondary endpoints. AstraZeneca PLC, a pharmaceutical company developing a direct competitor drug to Tarceva(TM), announced in August 2002 that its drug candidate, Iressa, showed no improvement in its front-line NSCLC trials when used in combination with chemotherapy against chemotherapy alone. These trials are similar to the Tarceva(TM) trials we are conducting in front-line NSCLC which assess Tarceva(TM) in combination with chemotherapy versus chemotherapy alone. AstraZeneca's announcement had a significant impact on our stock price. However, although both Tarceva(TM) and AstraZeneca's drug candidate belong to the same class of HER1/EGFR targeted therapies and a positive outcome for our Tarceva(TM) Phase III combination studies must therefore be considered higher risk, there are important differences between the two agents and the respective clinical programs including structure, formulation, pharmacokinetics, Phase III design, and dosing. The Phase III program for Tarceva(TM) is designed on the basis of our Phase II data which demonstrated encouraging indications of clinical activity in three separate single agent Phase II trials in refractory or advanced cancer patients with NSCLC, ovarian cancer or squamous cell carcinoma of the head and neck. Our two Phase III front-line studies in NSCLC are designed to assess the potential of survival benefit of Tarceva(TM) with standard chemotherapy. These trials contain noteworthy differences in study design as compared to those of AstraZeneca's trial design. The dose employed in our Phase III NSCLC program of 150 mg per day is the apparent maximum tolerated dose, or MTD, whereas the AstraZeneca trials were conducted at relatively lower doses for this agent versus the MTD determined for Iressa in earlier Phase I studies. The choice of the MTD as the dose for our Phase III studies is based on our belief that this dosing strategy may be clinically important in the use of this agent. In addition, and unlike AstraZeneca, we are conducting a Phase III study in refractory NSCLC investigating the potential survival benefit of single agent Tarceva(TM) at 150 mg per day. This is the most advanced single agent controlled Phase III study of an HER1/EGFR targeted agent designed to detect a survival advantage in refractory NSCLC. We believe this second/third line NSCLC trial is our highest priority and a key registration study for Tarceva(TM). We have, therefore, increased the patient size of this trial from 330 to approximately 700. We have also shifted emphasis from our pancreatic trial to our refractory NSCLC trial. In doing so, we intend to reduce the target patient enrollment in the pancreatic trial after consultation with the National Cancer Institute of Canada Clinical Trials Group with whom we are collaborating on this study. This reduction will not affect the endpoints but will extend the timeline for filing a new drug application, or NDA, for this indication. Initial results indicated that the combination of 100 mg per day of Tarceva(TM) with gemcitabine appeared to be the appropriate dose for this patient population. 7 During fiscal 2001, we agreed to collaborate with the U.S. National Cancer Institute in its CTEP program to conduct over 20 clinical trials with Tarceva(TM) in multiple tumor types, including epithelial malignancies of the gastrointestinal and genitourinary tracts, gynecological malignancies and brain tumors. The trials are being funded and managed by NCI, and we are providing Tarceva(TM) for these trials. These investigations generate useful clinical data in addition to maintaining awareness of Tarceva(TM) in the oncology community. OTHER PROPRIETARY CANCER PROGRAMS OSI-211. OSI-211 is a proprietary liposomal formulation of the active topoisomerase-1 inhibitor lurtotecan, a drug candidate that was originally licensed by Gilead from GlaxoSmithKline and subsequently acquired by us from Gilead. It is a member of the camptothecin class of cytotoxics that act as topoisomerase-1 inhibitors. This class of drugs has established activity in cancers. Two members of this class of drugs that are currently marketed are irinotecan (Camptosar(R) by Pharmacia Corporation in the United States and by Aventis in Europe) which is indicated primarily for colorectal cancer, and topotecan (Hycamtin(R) by GlaxoSmithKline) which is used to treat relapsed ovarian cancer and relapsed small cell lung cancer. Lurtotecan had been active in Phase II clinical trials. The liposome formulation was designed to enhance efficacy and improve the drug's therapeutic index. OSI-211 has been demonstrated to be active in a d,1,2,3 schedule (intravenous doses of OSI-211 on three consecutive days) for the treatment of relapsed ovarian cancer. However, in order to develop this agent, we believe it is essential that we clearly differentiate it from topotecan in terms of activity, safety and convenience. We have, therefore, initiated a head-to-head Phase II trial versus topotecan in relapsed ovarian cancer and a Phase II trial in advanced small cell lung cancer using the d,1,2,3 schedule. As part of the acquisition of the Gilead oncology assets, we have agreed to make a milestone payment to Gilead of $20 million, payable in cash or shares of our common stock or a combination of cash and shares of our common stock, at our option, upon our commencement of Phase III clinical trials for OSI-211. We have also agreed to pay to Gilead $10 million in cash upon our filing of an NDA with respect to OSI-211. Additional milestone payments are due to GlaxoSmithKline upon successful development of this product. OSI-7904L. OSI-7904L is a member of the thymidylate synthase inhibitor, or TSI, class of cytotoxic chemotherapies. This drug candidate was also originally licensed by Gilead from GlaxoSmithKline and subsequently acquired by us from Gilead. Milestone and royalty payments are due to GlaxoSmithKline upon successful development of this product. It is formulated in liposomes with a goal of extending its pharmacokinetic (or drug exposure) profile and thereby improving its therapeutic ratio. It is in Phase I clinical trials, having demonstrated promising activity in pre-clinical testing for the potential treatment of various solid tumors. The leading TSI used today is 5-Fluorouracil, or 5-FU, a generically available TSI which is extensively used in many tumor types, notably colorectal cancer. A recently marketed entrant from this class is capecitabine (Xeloda(R) by Roche), which is indicated in second line treatment of metastatic breast cancer and colon cancer. We believe that there is a need for better therapies than 5-FU or Xeloda(R) in relapsed colorectal cancer and metastatic breast cancer. Initial data from the Phase I study has indicated that the liposomal formulation has extended the drug exposure profile in patients' blood. OSI-7836. OSI-7836 was originally licensed by Gilead from the Southern Research Institute and subsequently acquired by us from Gilead. Milestone and royalty payments are due to Southern Research Institute upon successful development of this product. OSI-7836 is a member of the nucleoside class of cytotoxic drugs of which gemcitabine (Gemzar(R) marketed by Eli Lilly and Company) is the market leader. Gemzar(R) is approved in the United States for pancreatic cancer and non-small cell lung cancer. OSI-7836 is being developed as an alternative gemcitabine and has clearly demonstrated anti-tumor activity in a variety of refractory solid tumor xenograft models. PFIZER COLLABORATIVE CANCER PROGRAMS In April 1986, we entered into a collaborative research agreement and a license agreement with Pfizer which was focused on the discovery and development of cancer therapeutic products. On April 1, 2001, the 8 funded phase of the collaborative research agreement expired and was not renewed. We have three drug discovery programs in targeted therapies for cancer with Pfizer, two of which are in clinical trials and one is in advanced pre-clinical development. These programs are focused on developing drugs which are orally available, potent inhibitors of key protein tyrosine kinase receptors involved in signal transduction and angiogenesis. Angiogenesis is the process of blood vessel growth and is induced by solid tumors which require nutrients that enable growth. We believe that the ability to safely and effectively inhibit this process represents one of the most intriguing opportunities in cancer drug development. Under our alliance with Pfizer, we discovered two compounds in this area. CP-547,632 targets VEGFR and is in Phase I trials. A second drug candidate in this area, CP-673,451, targets the platelet derived growth factor receptor, or PDGFR, and is in advanced pre-clinical development. In September 2002, an additional candidate from the Pfizer program, CP-724,714, a potent, selective small molecule inhibitor of the HER2/erbB2 receptor tyrosine kinase, advanced to Phase I clinical trials. Overexpression of HER2/erbB2 oncogenes has been demonstrated to correlate with aggressive cancer growth, particularly in metastatic breast cancer. Approximately 25-30% of all women with metastatic breast cancer over express HER2/erbB2. OSI-754. On November 21, 2001, Pfizer chose to discontinue development of OSI-754, a farnesyl transferase inhibitor that was undergoing Phase I trials, and returned to us full commercial rights pursuant to the terms of the original license agreement between the parties. In November 2002, we suspended Phase I clinical development of OSI-754, allowing prioritization of clinical development resources to the Tarceva(TM) program. We will continue to conduct further internal, pre-clinical experiments with OSI-754 in order to gain a better understanding of the possible interactions and synergies of this class with our other research compounds. CONTINUOUS ENRICHMENT OF OUR PRODUCT PIPELINE We intend, through a combination of in-house research and aggressive technology acquisition, candidate in-licensing and partnering efforts, to add to our oncology pipeline of drug candidates. Since drug development is by its nature a high-risk venture, a philosophy of combining internal research and business development activities is important to our ability to sustain a high quality pipeline of clinical candidates. With the acquisition of the Gilead oncology assets in December 2001, as well as assets acquired from British Biotech plc in September 2001, we now have the skill sets necessary to conduct the entire process of drug discovery and development from the inception of the drug discovery process through to registration. These skill sets also enable us to absorb external opportunities at any stage of the drug discovery or development process. LICENSING AND ACQUISITIONS We have set ourselves a goal of continuing to enrich our pipeline beyond Tarceva(TM) by employing a strategy to identify and acquire products, clinical and pre-clinical development candidates and technology pertinent to our cancer mission. The acquisition of the oncology assets of Gilead is a successful example of this effort. This acquisition not only provided us with world class oncology development capabilities, but also three clinical stage drug candidates. The sourcing for these opportunities will range from academia to large pharmaceutical companies. INTERNAL DRUG DISCOVERY The core of our company has historically been built around a base of high quality scientific research focused on gene targeted, small molecule drug discovery. We have focused our internal discovery organization on oncology while continuing to collaborate extensively with high quality academic and technical groups. We believe this scientific base coupled with a platform of discovery technologies and capabilities will provide a stream of high quality product opportunities for our future growth. The mission of our drug discovery research teams is to generate a flow of product candidates to create a valuable pipeline which will contribute significant revenues in the five-to ten-year time frame. 9 OUR DRUG DISCOVERY AND DEVELOPMENT CAPABILITIES BACKGROUND Our approach is focused on the discovery and development of small molecule pharmaceutical products which, typically, would be taken either orally by a patient as a pill, capsule or suspension or intravenously as is common for many cancer products. Our drug discovery platform constitutes an integrated set of technologies and capabilities covering every major aspect of pre-clinical and clinical development. The process begins with a lead seeking phase. In this phase, which generally takes one to two years, a combination of modern molecular biology, robotics and computational science is used to build assay or test systems in which large libraries of diverse small molecules are tested to determine if any of these molecules possess activity against a drug target. In order to enhance our capabilities in this area, we have recently entered into a research collaboration with Cold Spring Harbor Laboratories to rapidly identify and validate new targets for cancer drug discovery. This collaboration will focus on identifying specific targets that we consider to be important in the progression of a variety of cancer types, thus allowing us the opportunity to take advantage of the wealth of genetic information that is rapidly being generated within the field of oncology. Our goal is to identify and validate a number of targets that will be proprietary to us and which can enter our automated screening tests. After this initial testing, active compounds are tested in a variety of secondary assays designed to determine their potency and selectivity, and to obtain early information on their potential metabolism, toxicity and mechanism of action. Active compounds surviving this selection process are considered leads and progress into lead optimization. During lead optimization, medicinal chemists synthesize new molecules and combinatorial libraries which are structurally related to the lead compound. These are tested extensively in order to produce a drug candidate which has greatly improved drug-like qualities, is active and well-tolerated in animal models and can be patented as a novel pharmaceutical. Having identified a suitable drug candidate, the molecule is advanced toward clinical trials and enters the IND-track phase, in which toxicological, scale-up synthesis and clinical trial design issues are addressed. This phase usually takes nine to 12 months. Upon entering clinical trials (with an investigational new drug, or IND, approval from the FDA or its foreign equivalent), a drug is first assessed for its safety. After these Phase I trials, drugs are tested in efficacy, or Phase II, trials to demonstrate initial activity in humans prior to extensive Phase III trials designed to collect the data necessary to support an NDA filing with the FDA. The entire drug discovery and development process typically takes over a decade and is subject to significant risk and attrition. A significant number of drug candidates which enter clinical trials fail to result in a successful product. We have, therefore, adopted a research strategy that manages a portfolio of product opportunities, adding, through in-licensing, lead compounds at various stages of the process in order to help mitigate the risks inherent in these efforts. We have integrated a platform of technologies designed to rapidly and cost-effectively enhance the overall process. OUR TECHNOLOGY PLATFORM We have built a fully-integrated drug discovery platform in order to accelerate the process of identifying and optimizing high-quality, small molecule drug candidates. Our core discovery technologies and capabilities include (i) gene transcription, signal transduction, protein kinases and other assay systems, (ii) automated high throughput screening, (iii) a library of over 350,000 proprietary small molecule compounds, (iv) medicinal and automated combinatorial chemistry, (v) in vivo pharmacology, pharmacokinetics and pharmaceutical development capabilities, and (vi) core clinical project management and regulatory affairs units. BIOLOGY AND LEAD SEEKING We are able to conduct high throughput screening on a wide variety of assay platforms, including enzyme, immuno and receptor assays. We have developed proprietary hardware and software systems to automate the entire drug screening process, from the addition of the test substances to assay systems to the analysis of the data generated from the tests. 10 Part of our assay technology includes the use of genetically engineered human cells to identify compounds that affect transcription of target genes. These assay systems, which employ reporter gene technology, represent a broadly enabling technology that is the subject of an extensive patent estate which we have successfully licensed to third parties. Access to large libraries of diverse, small molecule compounds is a key asset in our drug discovery efforts. Leads discovered from these libraries become the starting materials from which drugs are optimized. Our proprietary libraries include focused libraries of small molecule compounds derived from our high-speed combinatorial analoging, and libraries of diverse, high quality small molecule compounds that we have acquired. CHEMISTRY AND LEAD OPTIMIZATION The pharmaceutical properties of a lead compound generally must be optimized before clinical development of that compound begins. We have assembled a high quality medicinal chemistry team of combinatorial, computational and pharmaceutical development chemists, which are critical elements of the lead optimization process. A pilot manufacturing plant provides us the ability to rapidly scale up the production of small molecules for pre-clinical toxicology testing and early clinical trials and will further enable us to move competitively into clinical development. We also have a high quality group of professionals engaged in the in vivo testing of our lead compounds, including the use of so-called xenograft models. These models allow us to test potential anti-cancer drugs against human tumors grown in genetically modified mice. PRE-CLINICAL DEVELOPMENT We have expertise in pharmacokinetics, toxicology, drug metabolism and pharmaceutical chemistry to support the development of pre-clinical drug candidates. In addition, we have expertise in the management and generation of good laboratory practices and accredited data, which are required for regulatory dossier submissions to agencies such as the FDA. We are, therefore, able to independently support the development of a drug candidate for clinical testing. We have invested significant resources in expanding this capability and in technological enhancements in this area. CLINICAL DEVELOPMENT We have established an oncology development team with considerable expertise in clinical development, data management and analysis and regulatory approval. We also engage third-party clinical research organizations, or CROs, under the management and supervision of our clinical development team, to conduct large scale clinical studies. We have entered into agreements with CROs with expertise in oncology to monitor our ongoing clinical trials for Tarceva(TM). Our Tarceva(TM) development team works to integrate externally contracted clinical development support activities with contract research, manufacturing and inventory control organizations. Under our tripartite development agreement with Genentech and Roche, while the costs are shared equally, each party is responsible for managing certain trials. Genentech and Roche are each managing one of the Phase III trials in NSCLC testing Tarceva(TM) in combination with cytotoxic chemotherapy. We are managing the Tarceva(TM) Phase III trials in second/third line NSCLC and the combination chemotherapy trial in pancreatic cancer. MANUFACTURING AND SUPPLY We currently rely on third-party manufacturers to manufacture our late stage product candidates. Under our collaboration agreement with Genentech, we are responsible for the manufacture and supply of Tarceva(TM) for pre-clinical and clinical trials and to supply commercial quantities for sales within the United States. Under our collaboration agreement with Roche, Roche has elected to manufacture and supply Tarceva(TM) tablets for sale outside of the United States. Erlotinib HCl (Tarceva(TM)), a small molecule, is manufactured in a three-step process with high yield. We currently engage multiple third-party manufacturers to supply starting materials and active pharmaceutical ingredient, or API, used for the preparation of Tarceva(TM) tablets. We expect to enter into long-term 11 manufacturing and supply agreements with several of these manufacturers. In April 2001, we entered into a contract with a third party manufacturer to formulate erlotinib HC1 into tablets. Additionally, we are in the process of identifying an additional source for the tablet manufacture. All manufacturers are required to comply with current Good Manufacturing Practices, or cGMP. We have sufficient quantities of Tarceva(TM) tablets to conduct our ongoing clinical trials. We currently use third parties to label, inventory and distribute the drug product. In addition, we are using third-party manufacturers in connection with the development of alternative formulations of drug product consisting of an IV formulation and an oral solution. In connection with our acquisition of certain of the pre-clinical research operations of British Biotech in September 2001, we acquired a fully-integrated cGMP chemical pilot plant in Oxford, England. This plant is capable of producing clinical grade non-cytotoxic compounds on a scale sufficient to support our proprietary development activities generally through the completion of Phase II clinical trials. We plan to use this facility to manufacture products to support our current and future pre-clinical and clinical development programs. In connection with our purchase of certain oncology assets from Gilead in December 2001, we entered into a manufacturing agreement covering products acquired from Gilead. During a one-year transition period, Gilead has continued to manufacture and supply to us the API for preparation of OSI-7836 and OSI-7904L drug products. We are currently in the process of transitioning the manufacture of the API to new manufacturers as soon as practicable. Starting materials for OSI-7904L are manufactured by other third-party manufacturers. Starting materials for OSI-7836 are manufactured in our chemical pilot plant in our Oxford, England facility. The entire synthesis of OSI-211 API (including starting materials) is manufactured by a third party. Gilead will produce for us liposomal formulations of OSI-211 and OSI-7904L at its manufacturing facility in San Dimas, California to support our ongoing clinical trial activities and, upon FDA approval, commercial manufacturing needs for these two liposomal products. OSI-7836 drug product, which is a conventional IV formulation, will be prepared by a third party manufacturer that is yet to be determined. ROCHE AND GENENTECH COLLABORATION On January 8, 2001, we entered into an alliance with Genentech and Roche for the global co-development and commercialization of Tarceva(TM). We received upfront fees of $25 million related to this alliance, and Genentech and Roche each purchased $35 million of our common stock at $75.66 per share. We are also entitled to up to $92 million upon the achievement of certain milestones under the terms of the alliance. Under the Tripartite Agreement, we agreed with Genentech and Roche to optimize the use of each party's resources to develop Tarceva(TM) in certain countries around the world, and share certain global development costs on an equal basis; to share information generated under a global development plan; to facilitate attainment of necessary regulatory approval of Tarceva(TM) products for commercial marketing and sale in the world; and to work together on such matters as the parties agree from time to time during the development of Tarceva(TM). We, as well as Genentech and Roche, may conduct clinical and pre-clinical activities for additional indications for Tarceva(TM) not called for under the global development plan, subject to certain conditions. The Tripartite Agreement will terminate when either the OSI/Genentech agreement or the OSI/Roche agreement terminates. Under the OSI/Genentech agreement, we agreed to collaborate in the product development of Tarceva(TM) with the goal of obtaining regulatory approval for commercial marketing and sale in the United States of products resulting from the collaboration. Consistent with the development plan and with the approval of a joint steering committee, we will agree with Genentech as to who will own and be responsible for the filing of drug approval applications with the FDA other than the first NDA which we will own and be responsible for filing and the first supplemental NDA which we will have the option to own and be responsible for filing. Genentech has primary responsibility for the design and implementation of all product launch activities and the promotion, marketing and sales of all products resulting from the collaboration in the United States, its territories and Puerto Rico. We have certain co-promotion rights that may be enacted by mutual agreement at any time provided that we have established a commercial operation independent of Tarceva(TM). Genentech will pay us certain milestone payments and we will share equally in the operating profits or losses on products 12 resulting from the collaboration. Under the OSI/Genentech agreement, we granted to Genentech a royalty-free non-transferable (except under certain circumstances), non-sublicensable (except under certain circumstances), co-exclusive license under our patents and know-how related to Tarceva(TM) to use, sell, offer for sale and import products resulting from the collaboration in the United States, its territories and Puerto Rico. In addition, Genentech granted to us a royalty-free non-transferable (except under certain circumstances), non-sublicensable (except under certain circumstances), co-exclusive license to certain patents and know-how held by Genentech to use, make, have made, sell, offer for sale and import products resulting from the collaboration in the United States, its territories and Puerto Rico. We have primary responsibility for patent filings for the base patents protecting Tarceva(TM) and, in addition, we have the right, but not the obligation, to institute, prosecute and control patent infringement claims relating to the base patents. The term of the OSI/ Genentech agreement continues until the date on which neither we nor Genentech are entitled to receive a share of the operating profits or losses on any products resulting from the collaboration. The OSI/Genentech agreement is subject to early termination in the event of certain defaults. The agreement is also subject to early termination under certain circumstances. Under the OSI/Roche agreement, we granted to Roche a license under our intellectual property rights with respect to Tarceva(TM). Roche is collaborating with us and Genentech in the product development of Tarceva(TM) and is responsible for future marketing and commercialization of Tarceva(TM) outside of the United States in certain territories as defined in the agreement. The grant is a royalty-bearing, non-transferable (except under certain circumstances), non-sublicensable (except under certain circumstances), sole and exclusive license to use, sell, offer for sale and import products resulting from the development of Tarceva(TM) in the world, other than the territories covered by the OSI/Genentech agreement. In addition, Roche has the right, which it has exercised, to manufacture commercial supplies of Tarceva(TM) for its territory, subject to certain exceptions. Roche will pay us certain milestone payments and royalty payments on sales of products resulting from the collaboration. We have primary responsibility for patent filings for the base patents protecting Tarceva(TM) and, in addition, we have the right, but not the obligation, to institute, prosecute and control patent infringement claims relating to the base patents. The term of the OSI/Roche agreement continues until the date on which we are no longer entitled to receive a royalty on products resulting from the development of Tarceva(TM). The OSI/Roche agreement is subject to early termination in the event of certain defaults. In addition, after two and one half years from the effective date, Roche may terminate the agreement on a country-by-country basis. We may also have the right to terminate the agreement on a country-by-country basis if Roche has not launched or marketed a product in such country under certain circumstances. OTHER COLLABORATIONS ANADERM RESEARCH CORPORATION On April 23, 1996, we formed Anaderm with Pfizer and New York University for the discovery and development of novel compounds to treat conditions such as baldness, wrinkles and pigmentation disorders. In April 1999, we amended a prior research agreement with Pfizer and Anaderm to expand our collaborative program. On September 23, 1999 we sold our interest in Anaderm to Pfizer. The amended research agreement expired in April 2002, followed by a three-year phase-down period. Anaderm or Pfizer will pay royalties to us on the sales of products resulting from the collaboration. In July 2002, we announced our agreement with Anaderm to accelerate the conclusion of the phase-down period of this collaboration. We will receive an $8 million wind-down fee in consideration for transferring all research being performed by us to Anaderm. The transfer is expected to be completed by the beginning of 2003. DIABETES COLLABORATIONS We have collaborations with Tanabe Seiyaku Co., Ltd and the Vanderbilt University Diabetes Center in the area of diabetes. As a result of our strategy to focus on oncology, we intend to divest our diabetes program into an externally funded entity in which we will maintain a minority equity interest by the end of the second quarter of fiscal 2003. We believe that our high quality discovery research programs in this area can be more effectively capitalized through an externally-funded entity. We expect that the Tanabe and Vanderbilt collaborations will be transferred along with the diabetes program. In addition to our alliances with Tanabe 13 and Vanderbilt, our discovery research program in diabetes includes six proprietary gene-targeted discovery programs in the lead seeking and lead optimization phases, primarily focused in the glucose regulation and obesity fields. We intend to also transfer to this new entity these programs and the existing diabetes teams comprising approximately 24 employees from our existing work force. If external funding for this entity does not materialize, we will consider other alternatives to discontinue the diabetes program, including the outlicensing of the diabetes assets and employee headcount reductions. Our collaboration with Tanabe is focused on discovering and developing novel pharmaceutical products to treat diabetes. We are responsible for identification of targets, assay development, screening of compounds, identification of seed compounds, optimization of these seed compounds and identification of lead compounds meeting certain criteria specified in the agreement. Tanabe maintains responsibility for further development and marketing of a lead compound in exchange for milestone and royalty payments to us. The OSI/Vanderbilt research program, which commenced on April 28, 1998 and will end upon termination of the contract period under the Tanabe agreement unless mutually extended, is comprised of both research directed toward the targets identified, as well as those not identified, in the Tanabe agreement. Vanderbilt is assisting us in fulfilling our obligations under the OSI/Tanabe collaboration by providing access to Vanderbilt's drug discovery resources, including laboratories and assays. We provide funding to Vanderbilt to conduct the OSI/ Vanderbilt research program. A portion of this funding comes from Tanabe's funding of the OSI/Tanabe research program. We will also pay to Vanderbilt a percentage of the revenues we receive from Tanabe and any other third party which commercializes products resulting from the OSI/Tanabe research program, based on the extent to which Vanderbilt technology and patents contributed to the product generating the revenue. OTHER COLLABORATIVE RESEARCH PROGRAMS We have several other product candidates outside of cancer from our past collaborations which are being developed by our former partners. Should these candidates become commercialized drugs, we will receive royalties, and in one instance milestones, from sales of such products. These candidates are in various stages of early clinical and advanced pre-clinical development and include disease areas such as respiratory/asthma, heart disease and cosmeceuticals. The table below summarizes these agents. <Table> <Caption> PRODUCT/INDICATION STATUS * COLLABORATOR OSI INTEREST - ------------------ --------- ------------------------ ---------------------- AVE0309/Asthma Phase I Aventis Pharmaceuticals, Royalty Inc. OSIC-0961370/Congestive IND-Track Solvay Pharmaceuticals, Milestones and Royalty Heart Failure Inc. ADO1728/Cosmeceuticals IND-Track Pfizer/Anaderm Royalty AVE9488/Heart Disease IND-Track Aventis Pharmaceuticals, Royalty Inc. </Table> - --------------- (*) Denotes clinical safety and efficacy tests as follows: IND Track-Final stage of pre-clinical development which focuses on meeting formal FDA requirements for an IND. This phase typically takes nine months to one year to complete. Phase I-Evaluation of safety in humans. OUR INTELLECTUAL PROPERTY Patents and other proprietary rights are vital to our business. Our policy is to protect our intellectual property rights in technology developed by our scientific staff through a variety of means, including applying for patents in the United States and other major industrialized countries. We also rely upon trade secrets and improvements, unpatented proprietary know-how and continuing technological innovations to develop and maintain our competitive position. In this regard, we seek restrictions in our agreements with third parties, including research institutions, with respect to the use and disclosure of our proprietary technology. We also enter into confidentiality agreements with our employees, consultants and scientific advisors. 14 Patents issued in the United States, the European Patent Office, Japan, and 20 other countries, cover composition of matter for the Tarceva(TM) compound itself, processes for its preparation, and pharmaceutical compositions containing Tarceva(TM). Patent applications are being pursued, seeking protection in and outside the United States, for polymorphic, anhydrous, hydrate, and certain salt forms of Tarceva(TM), as well as for processes and important intermediate chemicals in the manufacture of Tarceva(TM). Further, patent protection for methods of use of Tarceva(TM) are being sought. As of September 30, 2002, we own 26 U.S. patents, 93 foreign patents, 32 pending applications for U.S. patents, two of which have been allowed, and 165 applications for foreign patents, two of which have been allowed. Moreover, we jointly own with Pfizer rights to numerous issued U.S. and foreign patents and pending U.S. and foreign patent applications and we jointly own, with North Carolina State University, two issued U.S. patent and certain U.S. and foreign pending patent applications. Further, other institutions have granted us exclusive rights under their U.S. and foreign patents and patent applications. More specifically, we co-own with Pfizer about 600 U.S. and foreign patents and patent applications in about 50 patent families. The majority are patent applications that cover novel compounds discovered during our cancer collaboration with Pfizer. These include two families of patents covering composition of matter for Tarceva(TM). They also include several families covering farnesyl transferase inhibitors (e.g., OSI-754), an OSI program, and other development compounds being pursued by Pfizer (i.e., VEGFR, PDGFR and erbB2 inhibitors). Several of the compounds in which we have an interest in certain of our research programs are also generically covered by some of these patents. We have assembled a strong gene transcription patent portfolio. We currently have 10 issued U.S. patents, one allowed European Patent Office patent, and two additional issued foreign patents in this patent estate. These include U.S. Patent Nos. 5,863,733, 5,665,543, 5,976,793 and 6,376,175, which cover the use of reporter genes in many cell-based transcription assays used for drug discovery; U.S. Patents Nos. 5,776,502 and 6,136,779, which cover methods of modulating gene transcription in vivo using low molecular weight compounds; U.S. Patent Nos. 5,580,722 and 5,846,720, which cover modulation of genes associated with cardiovascular disease, and U.S. Patent No. 6,165,712, which covers modulation of viral genes. We have additional patent applications pending, one of which has been allowed in the United States, that should further enhance our patent position in the area of gene transcription. We have a non-exclusive out-licensing program for our gene transcription patent estate. Currently, we have licensed this technology to Aurora Biosciences Corporation, Pharmacia, the R.W. Johnson Pharmaceutical Research Institute, Wyeth Corporation, BASF and Merck & Co., Inc. Helicon Therapeutics, Inc. also has an exclusive license for a narrow use. Under these agreements, we receive reciprocal license rights to other technology or annual fees together with milestone and royalty payments with respect to small-molecule gene transcription modulators developed and marketed as pharmaceutical products. We are seeking to expand our transcriptional licensing program to include additional users of the screening aspects of this technology. Financial return from this patent estate could accrue from licensing revenues in the event a compound, whose use is covered by our claims to methods of modulating gene transcription in vivo, becomes an approved drug. We have an exclusive license to patent applications filed by Southern Research Institute in the United States, European Patent Office, Japan, Canada, New Zealand and Australia to methods of use of OSI-7836 for the treatment of cancer, method of manufacture, and methods of inhibiting DNA synthesis. Patents directed to the OSI-211 and OSI-7904 compounds have issued in the United States, Japan, the European Patent Office, and, in the case of OSI-211, certain other countries. Patent protection is being sought for liposomal formulations of OSI-211 and OSI-7904. We also have non-exclusive licenses from Cadus Pharmaceutical Corporation (to seven U.S. patents, and additional U.S. and foreign applications) and Wyeth (to four U.S. patents, and additional foreign applications) to a portfolio of patents and applications covering yeast cells engineered to express heterologous gene-protein coupled receptors, or GPCR, and G-protein polypeptides, methods of use thereof in screening assays, and DNAs encoding biologically active yeast-mammalian hybrid GPCRs. 15 OUR COMPETITION The pharmaceutical and biotechnology industries are intensely competitive. We face, and will continue to face, intense competition from organizations such as large pharmaceutical companies, biotechnology companies and academic and research institutions. We face significant competition from industry participants which are pursuing the same or similar technologies as those that comprise our technology platform and are pursuing pharmaceutical products or therapies that are competitive with our potential products. Most of the major pharmaceutical organizations competing with us have greater capital resources, larger overall research and development staffs and facilities and greater experience in drug development, obtaining regulatory approval and pharmaceutical product manufacturing and marketing. Our major competitors include fully-integrated pharmaceutical companies that conduct extensive drug discovery efforts and are developing novel small molecule pharmaceuticals, as well as numerous smaller companies. With respect to our small molecule drug discovery programs, other companies have potential drugs in clinical trials to treat disease areas for which we are seeking to discover and develop drug candidates. These competing drug candidates may be further advanced in clinical development than our potential products in our small molecule programs and may result in effective, commercially successful products. In the cancer field, our lead drug candidate, Tarceva(TM), is currently in Phase III trials. At least three competitors, AstraZeneca PLC, ImClone Systems Incorporated/Bristol Myers Squibb, and Abgenix, Inc./Amgen, Inc., also have substantial clinical development programs for this target. AstraZeneca has recently received approval for Iressa, its anti-EGFR drug, in Japan and has an NDA before the FDA. We also face competition with respect to our next-generation cytotoxic drug candidates. The most advanced of these products, OSI-211, a topoisomerase-1 inhibitor, is currently in Phase II trials for refractory ovarian and small cell lung cancer. Hycamtin(R) is already marketed for this target by GlaxoSmithKline. The two other products, OSI-7836 and OSI-7904L, are both in Phase I trials. OSI-7836 is a nucleoside analog; Eli Lilly currently markets Gemzar(R) for this target. OSI-7904L is a thymidylate synthase inhibitor; this target faces generic competition, as well as competition from Xeloda(R) which is marketed by Roche. Companies with related research and development activities also present significant competition for us. For example, research efforts with respect to gene sequencing and mapping are identifying new and possibly superior target genes than our target genes. In addition, alternative drug discovery strategies, such as monoclonal antibodies, may prove more effective than those pursued by us. Furthermore, competitors may have access to more diverse compounds than we do for testing by virtue of larger compound libraries or through combinatorial chemistry skills or other means. We believe that our ability to compete successfully will be based upon, among other things, our ability to create and maintain scientifically advanced technology, attract and retain scientific and clinical personnel possessing a broad range of expertise, obtain patent protection or otherwise develop and protect proprietary products or processes, compete for premium in-licensing products, conduct clinical trials, obtain required government approvals on a timely basis and commercialize our products. GOVERNMENT REGULATION We and our collaborative partners are subject to, and any potential products discovered and developed by us must comply with, comprehensive regulation by the FDA in the United States and by comparable authorities in other countries. These national agencies and other federal, state, and local entities regulate, among other things, the pre-clinical and clinical testing, safety, effectiveness, approval, manufacture, labeling, marketing, export, storage, record keeping, advertising and promotion of pharmaceutical and diagnostic products. 16 THE FDA PROCESS The process required by the FDA before pharmaceutical products may be approved for marketing in the United States generally involves: - pre-clinical laboratory and animal tests; - submission to the FDA of an IND application, which must be in effect before clinical trials may begin; - adequate and well controlled human clinical trials to establish the safety and efficacy of the drug for its intended indication; - submission to the FDA of an NDA; and - FDA review of the NDA or product license application in order to determine, among other things, whether the drug is safe and effective for its intended uses. Pre-clinical tests include laboratory evaluation of product chemistry and formulation, as well as animal studies, to assess the potential safety and efficacy of the product. Certain pre-clinical tests must comply with FDA regulations regarding current good laboratory practices. The results of the pre-clinical tests are submitted to the FDA as part of an investigational new drug application to support human clinical trials and are reviewed by the FDA, with patient safety as the primary objective, prior to the commencement of human clinical trials. Clinical trials are conducted according to protocols that detail matters such as a description of the condition to be treated, the objectives of the study, a description of the patient population eligible for the study and the parameters to be used to monitor safety and efficacy. Each protocol must be submitted to the FDA as part of the investigational new drug application. Protocols must be conducted in accordance with FDA regulations concerning good clinical practices to ensure the quality and integrity of clinical trial results and data. Failure to adhere to good clinical practices and the protocols may result in FDA rejection of clinical trial results and data, and may delay or prevent the FDA from approving the drug for commercial use. Clinical trials are typically conducted in three sequential phases, which may overlap. During Phase I, when the drug is initially given to human subjects, the product is tested for safety, dosage tolerance, absorption, distribution, metabolism, and excretion. Phase I studies are often conducted with healthy volunteers depending on the drug being tested. Phase II involves studies in a limited patient population (typically patients with the conditions needing treatment) to: - evaluate preliminarily the efficacy of the product for specific, targeted indications; - determine dosage tolerance and optimal dosage; and - identify possible adverse effects and safety risks. Pivotal or Phase III adequate and well-controlled trials are undertaken in order to evaluate efficacy and safety in a comprehensive fashion within an expanded patient population for the purpose of registering the new drug. The FDA may suspend or terminate clinical trials at any point in this process if it concludes that patients are being exposed to an unacceptable health risk. Results of pre-clinical and clinical trials must be summarized in comprehensive reports for the FDA. In addition, the results of Phase III studies are often subject to vigorous statistical analysis. This data may be presented in accordance with the guidelines for the International Committee of Harmonization that can facilitate registration in Europe and Japan. FDA approval of our own and our collaborators' products is required before the products may be commercialized in the United States. FDA approval of the NDA will be based, among other factors, on our comprehensive reporting of clinical data, risk/benefit analysis, animal studies, and manufacturing processes and facilities. The process of obtaining NDA approvals from the FDA can be costly and time consuming and may be affected by unanticipated delays. Among the conditions for NDA approval is the requirement that the prospective manufacturer's procedures conform to good manufacturing practices, or cGMP, which must be followed at all times. In 17 complying with this requirement, manufacturers, including a drug sponsor's third-party contract manufacturers, must continue to expend time, money and effort in the area of production quality assurance, and quality control to ensure compliance. Domestic manufacturing establishments are subject to periodic inspections by the FDA in order to assess, among other things, compliance with cGMP. To supply products for use in the United States, foreign manufacturing establishments also must comply with cGMP and are subject to periodic inspection by the FDA or by regulatory authorities in certain countries under reciprocal agreements with the FDA. Both before and after market approval is obtained, a product, its manufacturer and the holder of the NDA for the product are subject to comprehensive regulatory oversight. Violations of regulatory requirements at any stage, including after approval, may result in various adverse consequences, including the FDA's delay in approving or refusal to approve a product, withdrawal of an approved product from the market and the imposition of criminal penalties against the manufacturer and NDA holder. In addition, later discovery of previously unknown problems may result in restrictions on the product, manufacturer or NDA holder, including withdrawal of the product from the market. Furthermore, new government requirements may be established that could delay or prevent regulatory approval of our products under development. OTHER REGULATORY PROCESSES For marketing of a drug outside the United States, we and our collaborators, and the drugs developed by us, if any, will be subject to foreign regulatory requirements governing human clinical trials and marketing approval for drugs. The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary widely from country to country. Before a new drug may be exported from the United States, it must either be approved for marketing in the United States or meet the requirements of exportation of an unapproved drug under Section 802 of the Export Reform and Enhancement Act or comply with FDA regulations pertaining to INDs. In addition to regulations enforced by the FDA, we must also comply with regulations under the Occupational Safety and Health Act, the Environmental Protection Act, the Toxic Substances Control Act, the Resource Conservation and Recovery Act and other federal, state and local regulations. Our research and development activities involve the controlled use of hazardous materials, chemicals and various radioactive compounds. Although we believe that our safety procedures for handling and disposing of hazardous materials comply with the standards prescribed by state and federal regulations, the risk of accidental contamination or injury from these materials cannot be completely eliminated. OUR EMPLOYEES In October 2002, reflecting the refocusing of our business on oncology and away from the screening services that we had historically provided to our former collaborative partners, we reduced our headcount by 42 employees, most of whom had been involved in early research activities. Following this reduction, as of October 31, 2002, we employed 429 persons worldwide (277 in the United States), of whom 173 were primarily involved in research activities and 140 in development activities, with the remainder engaged in executive and administrative capacities. Although we believe that we are now more appropriately sized to focus on our mission in oncology, we intend to add personnel with specialized oncology expertise, as needed. We believe that we have been successful to date in attracting skilled and experienced scientific and business professionals. We consider our employee relations to be good. However, competition for personnel is intense and we cannot assure that we will continue to be able to attract and retain personnel of high caliber. Further, we believe that our success is largely dependent upon our ability to attract and retain such qualified personnel. 18 CAUTIONARY FACTORS THAT MAY AFFECT FUTURE RESULTS (Cautionary Statement under the Private Securities Litigation Reform Act of 1995, as amended) This report contains forward-looking statements that do not convey historical information, but relate to predicted or potential future events, such as statements of our plans, strategies and intentions, or our future performance or goals for our product development programs. These statements can often be identified by the use of forward-looking terminology such as "believe," "expect," "intend," "may," "will," "should," or "anticipate" or similar terminology. The statements involve risks and uncertainties and are based on various assumptions. Stockholders and prospective stockholders are cautioned that these statements are only projections. In addition, any forward-looking statement that we make is intended to speak only as of the date on which we made the statement. We will not update any forward-looking statement to reflect events or circumstances that occur after the date on which the statement is made. The following risks and uncertainties, among others, may cause our actual results to differ materially from those described in forward-looking statements made in this report or presented elsewhere by management from time to time. ALTHOUGH WE HAVE POTENTIAL ONCOLOGY PRODUCTS THAT APPEAR TO BE PROMISING AT EARLY STAGES OF DEVELOPMENT AND IN CLINICAL TRIALS, NONE OF OUR POTENTIAL ONCOLOGY PRODUCTS MAY REACH THE MARKET FOR A NUMBER OF REASONS. Successful research and development of pharmaceutical products is high risk. Most projects and development candidates fail to reach the market. Our success depends on the discovery of new drugs that we can commercialize. It is possible that none of our potential oncology products, including Tarceva(TM), may ever reach the market for a number of reasons. They may be found ineffective or cause harmful side effects during pre-clinical testing or clinical trials or fail to receive necessary regulatory approvals. We may find that certain products cannot be manufactured on a commercial scale basis and, therefore, they may not be economical to produce. Our products could also fail to achieve market acceptance or be precluded from commercialization by proprietary rights of third parties. We have a number of oncology product candidates in early stages of development and we do not expect them to be commercially available for several years, if at all. All but six of our product candidates are in the pre-clinical development phase. The six candidates that are in clinical trials will still require significant research and development and regulatory approvals before we or our collaborative partners will be able to market them. IF WE HAVE A SETBACK IN OUR TARCEVA(TM) PROGRAM, OUR STOCK PRICE WOULD ALMOST CERTAINLY DECLINE. We are currently conducting four Phase III clinical trials for Tarceva(TM). If we do not receive any positive results from these trials, we would need to conduct additional clinical trials or abandon our Tarceva(TM) program. Since Tarceva(TM) is our most advanced product candidate, a setback of this nature would almost certainly cause a decline in our stock price. Recently, AstraZeneca announced unfavorable results from its clinical trials which were testing its drug candidate, Iressa, which is in the same class of targeted therapies as Tarceva(TM), in combination with traditional chemotherapy agents for the front line treatment of non small cell lung cancer. While there are important differences between Iressa and Tarceva(TM) and AstraZeneca's clinical program and our clinical program, including structure, formulation, pharmacokinetics and Phase III trial design and dosing, two of our four Phase III trials are designed to test Tarceva(TM) in combination with chemotherapy agents for NSCLC in studies similar to those of AstraZeneca. A positive outcome from these two trials must now be considered higher risk. SET-BACKS ON THE PART OF OUR COMPETITORS WHO ARE DEVELOPING DRUGS IN THE HER1/EGFR FIELD WHICH ARE SIMILAR TO TARCEVA(TM) COULD RESULT IN DECREASES IN OUR STOCK PRICE. Our major competitors who are developing drugs in the HER1/EGFR field which are similar to our most advanced clinical candidate, Tarceva(TM), have suffered setbacks with respect to their drug candidates during the last 12 months which have impacted our stock price by raising concerns regarding the HER1/EGFR class of targeted therapies. Both AstraZeneca and ImClone, who are each developing drug candidates in the same 19 class of HER1/EGFR targeted therapies as Tarceva(TM), suffered setbacks in their programs during the last year. These setbacks have resulted in casting doubt amongst some investors on all drug candidates targeting the HER1/EGFR gene, including Tarceva(TM), which has led to declining stock prices for us and others developing drugs in this class. Additional set-backs on the part of our competitors could result in a further decrease in our stock price. IF WE ARE UNABLE TO DEMONSTRATE ACCEPTABLE SAFETY AND EFFICACY OF TARCEVA(TM) DURING CLINICAL TRIALS, WE WILL NOT BE ABLE TO OBTAIN REGULATORY APPROVAL AND THUS WILL NOT BE ABLE TO COMMERCIALIZE AND GENERATE REVENUES FROM TARCEVA(TM). We must continue to demonstrate, through pre-clinical testing and clinical trials, that Tarceva(TM) is safe and effective. The results from pre-clinical testing and early clinical trials may not be predictive of results obtained in subsequent clinical trials, and we cannot be sure that our clinical trials will demonstrate the safety and efficacy necessary to obtain regulatory approval for Tarceva(TM). A number of companies in the biotechnology and pharmaceutical industries have suffered significant setbacks in advanced clinical trials, even after obtaining promising results in earlier trials. In addition, certain clinical trials are conducted with patients having the most advanced stages of disease. During the course of treatment, these patients often die or suffer other adverse medical effects for reasons that may not be related to the pharmaceutical agent being tested. These events can complicate our statistical analysis of clinical trial results and may lead to misinterpretation of clinical trial results. Any significant delays in, or termination of, clinical trials for Tarceva(TM) may hinder our ability to obtain regulatory approval of Tarceva(TM). Any delays in obtaining or failure to obtain regulatory approval will hinder or prevent us from commercializing and generating revenues from Tarceva(TM). IF WE DO NOT MAINTAIN OUR CO-DEVELOPMENT AND MARKETING ALLIANCE WITH GENENTECH AND ROCHE FOR TARCEVA(TM), OUR ABILITY TO PROCEED WITH THE TIMELY AND PROFITABLE MANUFACTURE AND SALE OF TARCEVA(TM) MAY BE COMPROMISED OR DELAYED. If we do not maintain a successful collaborative partnership with Genentech and Roche for the co-development and commercialization of Tarceva(TM), we may be forced to focus our efforts internally to commercialize Tarceva(TM) which would require a greater expenditure of financial resources and may cause a delay in launch and market penetration while we build our own commercial operation or seek alternative partners. Although we manage the manufacturing of Tarceva(TM) for the U.S. market through third party providers, there may be a delay in our ability to scale up if we were requested to replace Roche's manufacturing role in markets outside of the United States. IF OUR COMPETITORS WHO ARE DEVELOPING DRUGS IN THE HER1/EGFR FIELD RECEIVE FDA APPROVAL FOR THEIR DRUG CANDIDATES AND COMMENCE MARKETING SUCH PRODUCTS SIGNIFICANTLY IN ADVANCE OF OUR LAUNCH OF TARCEVA(TM), THEN OUR ABILITY TO COMPETE FOR SALES IN THIS MARKET MAY BE A GREATER CHALLENGE. If our competitors, some of whom have greater resources than we do, receive FDA approval for their drugs and begin marketing those products significantly in advance of our launch of Tarceva(TM), it may be more difficult for us to penetrate the market and our sales may be less than projected. This could negatively impact our potential future profitability and the scope of our operations including research and development of our other oncology drug candidates. IF OUR COMPETITORS SUCCEED IN DEVELOPING PRODUCTS AND TECHNOLOGIES THAT ARE MORE EFFECTIVE THAN OUR OWN, OUR PRODUCTS AND TECHNOLOGIES MAY BE RENDERED LESS COMPETITIVE. We face significant competition from industry participants that are pursuing similar products and technologies as we are and are developing pharmaceutical products that are competitive with our potential products. Where we are developing products independently, some of the organizations competing with us have greater capital resources, larger overall research and development staffs and facilities, and more extensive experience in drug discovery and development, obtaining regulatory approval and pharmaceutical product 20 manufacturing and marketing. With these additional resources, our competitors may be able to respond to the rapid and significant technological changes in the biotechnology and pharmaceutical industries faster than we can. Our future success will depend in large part on our ability to maintain a competitive position with respect to these technologies. Rapid technological development may result in our compounds, products or processes becoming obsolete before we recover any of the expenses incurred to develop them. In particular, we face significant competition from other biotechnology and pharmaceutical companies which are currently developing drugs similar to Tarceva(TM) that could dilute our potential for sales from Tarceva(TM). We are aware of at least three companies, some of which have resources substantially greater than we do, which currently have drugs similar to Tarceva(TM) in substantial clinical development programs. In addition to AstraZeneca's Iressa, ImClone/Bristol Myers Squibb and Abgenix/Amgen are developing a different kind of product, humanized antibodies, against the HER1/EGFR target. The ImClone product is currently in Phase III trials, and the Abgenix product is in Phase II trials. If our competitors succeed in developing drugs similar to Tarceva(TM) that are more effective than our own, our product may not gain widespread market acceptance. IF WE ARE UNABLE TO ESTABLISH A COMMERCIAL INFRASTRUCTURE FOR THE MARKETING OF OUR POTENTIAL ONCOLOGY PRODUCTS OTHER THAN TARCEVA(TM), WE WILL NEED TO ENTER INTO AND MAINTAIN ARRANGEMENTS WITH THIRD PARTIES FOR COMMERCIALIZATION OF SUCH PRODUCTS WHICH COULD SUBSTANTIALLY DIMINISH OUR SHARE OF THE REVENUES FROM THE SALES OF SUCH PRODUCTS. In order to successfully commercialize our other product candidates, we must be able to: - manufacture our products in commercial quantities at reasonable costs; - obtain reimbursement coverage for our products; - compete favorably against other products; and - market our products successfully. We may not be successful in establishing a commercial infrastructure to enable us to accomplish the above with respect to our products other than Tarceva(TM). If we are unsuccessful or delayed in establishing this infrastructure, we would need to enter into and successfully maintain additional co-development and commercialization agreements. This would result in our receipt of a decreased share of the revenues generated from the sale of such products. IF OUR COLLABORATIVE PARTNERS OR OTHER THIRD PARTY CONTRACTORS GIVE OTHER PRODUCTS GREATER PRIORITY THAN OUR PRODUCTS, OUR PRODUCTS MAY BE SUBJECT TO DELAYS IN RESEARCH AND DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION THAT MAY IMPEDE OUR ABILITY TO TAKE THEM TO MARKET BEFORE OUR COMPETITORS. THIS MAY RENDER OUR PRODUCTS OBSOLETE OR MAY RESULT IN LOWER THAN ANTICIPATED REVENUES FOR US. We rely on some of our collaborative partners and certain third party contractors to assist with research and development as well as the manufacture of our potential products in their FDA-approved manufacturing facilities. Some of our collaborative agreements allow these parties significant discretion in electing whether or not to pursue the activities that they have agreed to pursue for us. We cannot control the amount and timing of resources these parties devote to our programs or potential products. Our potential products may be in competition with other products for priority of access to these parties' research and development and manufacturing facilities. If these parties do not give significant priority to the research and development or manufacture of our potential products in an effective or timely manner, the clinical development of our product candidates or their submission for regulatory approval could be delayed, and our ability to deliver products to the market on a timely basis could be impaired. Furthermore, we may not be able to enter into any necessary third-party research and development or manufacturing arrangements on acceptable terms, if at all. 21 IF GOVERNMENT AGENCIES DO NOT GRANT US OR OUR COLLABORATIVE PARTNERS REQUIRED APPROVALS FOR ANY OF OUR POTENTIAL PRODUCTS, WE OR OUR COLLABORATIVE PARTNERS WILL NOT BE ABLE TO MANUFACTURE AND SELL OUR PRODUCTS. All of our newly discovered potential products must undergo an extensive regulatory approval process in the United States and other countries. This regulatory process, which includes pre-clinical testing and clinical trials of each compound to establish its safety and efficacy, can take many years and requires the expenditure of substantial resources. Moreover, data obtained from pre-clinical and clinical activities are susceptible to varying interpretations that could delay, limit or prevent regulatory approval. The FDA and other regulatory agencies may delay or deny the approval of our proposed products. None of our products has yet received governmental approval, and none may ever do so. If we do not receive the required regulatory approvals, we or our collaborative partners will not be able to manufacture and sell our products. Even if we obtain regulatory approval, a marketed product and its manufacturer are subject to continuing review, including post-marketing surveillance. We may be required to withdraw our product from the market if previously unknown problems are discovered. Violations of regulatory requirements at any stage may result in various unfavorable consequences to us, including the FDA's imposition of criminal penalties against the manufacturer and the holder of the NDA. OUR RELIANCE ON THIRD PARTIES SUCH AS CLINICAL DISTRIBUTORS, MANUFACTURERS AND CLINICAL RESEARCH ORGANIZATIONS, OR CROS, MAY RESULT IN DELAYS IN COMPLETING, OR A FAILURE TO COMPLETE, CLINICAL TRIALS IF THEY FAIL TO PERFORM UNDER OUR AGREEMENTS WITH THEM. From time to time in the course of product development, we may engage clinical distributors, manufacturers and/or CROs to manufacture and distribute the product candidate and to conduct and manage clinical studies and to assist us in guiding products through the FDA review and approval process. Because we have engaged and intend to engage clinical distributors, manufacturers and CROs to help us obtain market approval for our drug candidates, many important aspects of this process have been and will be out of our direct control. If the clinical distributors, manufacturers and CROs fail to perform their obligations under our agreements with them or fail to manufacture and distribute the product candidate and to perform clinical trials in a satisfactory manner, we may face delays in completing our clinical trials, as well as commercialization of any drug candidate. Furthermore, any loss or delay in obtaining contracts with such entities may also delay the completion of our clinical trials and the market approval of drug candidates. WE HAVE INCURRED LOSSES SINCE OUR INCEPTION, AND WE EXPECT TO INCUR LOSSES OVER THE NEXT SEVERAL YEARS, WHICH MAY CAUSE THE VALUE OF OUR COMMON STOCK TO DECREASE. We have had net operating losses since our inception in 1983. At September 30, 2002, our accumulated deficit was approximately $324.2 million. Our losses have resulted principally from costs incurred in research and development, acquired in-process research and development and from general and administrative costs associated with our operations. These costs have exceeded our revenues, and we expect them to continue to do so until we generate significant sales from marketed products. We expect to continue to incur operating losses over the next few years as a result of our expenses for the development of Tarceva(TM) and our other clinical products and our research programs. These expenses include enhancements in our drug discovery technologies and increases in the resources we will devote to our internally funded proprietary projects. We do not expect to generate revenues from the sale of our potential products for a number of years, and we expect to continue to incur operating losses during this period. IF WE CANNOT PROTECT OUR INTELLECTUAL PROPERTY RIGHTS, OUR ABILITY TO DEVELOP AND COMMERCIALIZE OUR PRODUCTS WILL BE SEVERELY LIMITED. As of September 30, 2002, we held 26 U.S. patents, 93 foreign patents, 32 pending applications for U.S. patents, two of which have been allowed, and 165 applications for foreign patents, two of which have been allowed. Moreover, we jointly hold with Pfizer rights to numerous issued U.S. and foreign patents and pending U.S. and foreign patent applications. We also jointly hold, with North Carolina State University, two issued 22 U.S. patents and certain U.S. and foreign pending patent applications. We intend to continue to aggressively seek patent protection for all of the product candidates that we have discovered, developed or acquired. Our success depends, in part, on our ability and our collaborative partners' ability to obtain patent protection for new product candidates, maintain trade secret protection and operate without infringing the proprietary rights of third parties. As with most biotechnology and pharmaceutical companies, our patent position is highly uncertain and involves complex legal and factual questions. Without patent and other similar protection, other companies could offer substantially identical products for sale without incurring the sizable discovery and development costs that we have incurred. Our ability to recover these expenditures and realize profits upon the sale of products could be diminished. The process of obtaining patents can be time consuming and expensive with no certainty of success. Even if we spend the necessary time and money, a patent may not issue or it may insufficiently protect the technology it was intended to protect. We can never be certain that we were the first to develop the technology or that we were the first to file a patent application for the particular technology because most U.S. patent applications are confidential until a patent issues, and publications in the scientific or patent literature lag behind actual discoveries. The degree of future protection for our proprietary rights will remain uncertain if our pending patent applications are not approved for any reason or if we are unable to develop additional proprietary technologies that are patentable. Furthermore, third parties may independently develop similar or alternative technologies, duplicate some or all of our technologies, design around our patented technologies or challenge our issued patents. IF OTHER COMPANIES CLAIM THAT WE INFRINGE ON THEIR INTELLECTUAL PROPERTY RIGHTS, WE MAY BE SUBJECT TO COSTLY AND TIME-CONSUMING LITIGATION AND DELAYS IN PRODUCT INTRODUCTION. Our processes and potential products may conflict with patents which have been or may be granted to competitors, academic institutions or others. As the biotechnology and pharmaceutical industries expand and more patents are filed and issued, the risk increases that our product candidates may give rise to a declaration of interference by the Patent and Trademark Office, or to claims of patent infringement by other companies, institutions or individuals. These entities or persons could bring legal proceedings against us seeking substantial damages or seeking to enjoin us from testing, manufacturing or marketing our products. If any of these actions were successful, we may also be required to cease the infringing activity or obtain the requisite licenses or rights to use the technology which may not be available to us on acceptable terms, if at all. Any litigation, regardless of the outcome, could be extremely costly to us. IF OTHER BIOTECHNOLOGY AND PHARMACEUTICAL COMPANIES ARE NOT WILLING TO PAY APPROPRIATE ROYALTIES FOR THE USE OF OUR PATENTED "GENE TRANSCRIPTION ESTATE," WE MAY NEED TO EXPEND SUBSTANTIAL AMOUNTS OF FUNDS AND RESOURCES IF WE CHOOSE TO ENFORCE THE PATENTS. We license to other companies rights to use our patented "gene transcription estate" which consists of drug discovery assays that provide a way to identify novel product candidates that can control the activity of genes. We believe technology and practices covered by these patents are in widespread use in the pharmaceutical and biotechnology industries. To date, we have granted seven licenses to use our gene transcription patents. If other pharmaceutical and biotechnology companies which we believe are using our patented technology are not willing to negotiate license arrangements with us on reasonable terms, we may have to choose between abandoning our licensing strategy or initiating legal proceedings against those companies. Legal action, particularly patent infringement litigation, is extremely costly. IF WE OR OUR COLLABORATIVE PARTNERS ARE REQUIRED TO OBTAIN LICENSES FROM THIRD PARTIES, OUR REVENUES AND ROYALTIES ON ANY COMMERCIALIZED PRODUCTS COULD BE REDUCED. The development of some of our products may require the use of technology developed by third parties. The extent to which efforts by other researchers have resulted or will result in patents and the extent to which we or our collaborative partners are forced to obtain licenses from others, if available, is currently unknown. If 23 we or our collaborative partners must obtain licenses from third parties, fees must be paid for such licenses. These fees would reduce the revenues and royalties we may receive on commercialized products. THE USE OF ANY OF OUR POTENTIAL PRODUCTS IN CLINICAL TRIALS AND THE SALE OF ANY APPROVED PRODUCTS MAY EXPOSE US TO LIABILITY CLAIMS RESULTING FROM THE USE OF PRODUCTS OR PRODUCT CANDIDATES. The nature of our business exposes us to potential liability risks inherent in the testing, manufacturing and marketing of drug discovery candidates and products. Using our drug candidates in clinical trials may expose us to product liability claims. These risks will expand with respect to drugs, if any, that receive regulatory approval for commercial sale. While we currently maintain product liability insurance that we believe is adequate, such insurance may not be available at reasonable rates, if at all, in the future. If we do not or cannot maintain adequate insurance coverage, we may incur significant liability if a product liability claim arises. IF WE CANNOT OBTAIN ADEQUATE FUNDING FOR OUR RESEARCH AND DEVELOPMENT EFFORTS OR OUR PROJECTED FUTURE SALES ARE DELAYED OR DIMINISHED, WE MAY HAVE TO LIMIT THE SCOPE OF OUR PROPRIETARY PRODUCT DEVELOPMENT IN FUTURE YEARS OR ENTER INTO MORE RESTRICTIVE ARRANGEMENTS WITH COLLABORATIVE PARTNERS. Our future capital requirements will depend on many factors, including the size and complexity of our research and development programs, the progress of pre-clinical testing and early stage clinical trials, the time and costs involved in obtaining regulatory approvals for our product candidates, the costs of manufacturing arrangements and the costs of commercialization activities. Although we believe our current cash reserves are sufficient for our near-term operating needs, we may choose to raise additional funds through public or private sales of our securities, including equity securities, as well as from collaborative partners in order to further our growth. We may not be able to obtain adequate funding from equity financings on reasonable or acceptable terms, if at all. Furthermore, any additional equity financings may dilute the value of the common stock held by our stockholders. If adequate funds are not available, we may be required to significantly curtail one or more of our research and development programs or obtain funds through arrangements with collaborative partners or others that may require us to relinquish certain of our rights to a number of our technologies or product candidates. IF THE MARKET PRICE OF OUR COMMON STOCK, SIMILAR TO OTHER BIOTECHNOLOGY COMPANIES, REMAINS HIGHLY VOLATILE, THEN OUR STOCKHOLDERS MAY NOT BE ABLE TO SELL THEIR STOCK WHEN DESIRED OR AT DESIRABLE PRICES. When the stock prices of companies in the Nasdaq Biotechnology Index fall, our stock price will most likely fall as well. The market price of the common stock of biotechnology and pharmaceutical companies and our common stock has been volatile and may remain volatile for the foreseeable future. If our stock price falls, our stockholders may not be able to sell their stock when desired or at desirable prices. The following factors, among others, some of which are beyond our control, may also cause our stock price to decline: - fluctuations in operating results; - announcements of technological innovations or new therapeutic products by others; - negative or neutral clinical trial results; - developments concerning strategic alliance agreements; - negative clinical or safety results from our competitors' products; - changes in government regulation including pricing controls; - delays with the FDA in the approval process for Tarceva(TM) and other clinical candidates; - developments in patent or other proprietary rights; - public concern as to the safety of our products; 24 - future sales of substantial amounts of our common stock by existing stockholders; and - comments by securities analysts and general market conditions. OUR OUTSTANDING INDEBTEDNESS HAS INCREASED SUBSTANTIALLY WITH THE ISSUANCE OF CONVERTIBLE SENIOR SUBORDINATED NOTES IN FEBRUARY 2002, AND WE MAY NOT BE ABLE TO PAY THESE NOTES AND OUR OTHER OBLIGATIONS. As a result of the sale of the Convertible Senior Subordinated Notes in February 2002 and the subsequent repurchase of a portion of these notes in August and September 2002, our long-term debt relating to these notes was $160 million as of September 30, 2002. This may: - make it more difficult for us to obtain any necessary financing in the future for working capital, capital expenditures, debt service requirements or other purposes; - significantly increase our interest expense and related debt service costs; and - make us more vulnerable in the event of a downturn in our business. Currently, we do not have any product sales and we are not generating sufficient cash flow to satisfy the annual debt service payments that will be required as a result of the consummation of the sale of the notes. This may require us to use a portion of the proceeds from the sale of the notes to pay interest or borrow additional funds or sell additional equity to meet our debt service obligations after the first three years when the payment of interest on the notes is no longer secured. If we are unable to satisfy our debt service requirements, or do not have the funds to repay the notes upon maturity in 2009, we will default on the notes and liquidity problems could result. OUR CORPORATE GOVERNANCE DOCUMENTS AND STATE LAW PROVIDE CERTAIN ANTI-TAKEOVER MEASURES WHICH WILL DISCOURAGE CERTAIN TYPES OF TRANSACTIONS INVOLVING AN ACTUAL OR POTENTIAL CHANGE IN CONTROL OF OUR COMPANY. Under our certificate of incorporation, our Board of Directors has the authority, without further action by the stockholders, to fix the rights and preferences, and issue shares of, preferred stock. Since January 1999, we have had a shareholders rights plan, which was subsequently replaced with a new plan, commonly referred to as a "poison pill." Further, we are subject to Section 203 of the Delaware General Corporation Law which, subject to certain exceptions, restricts certain transactions and business combinations between a corporation and a stockholder owning 15% or more of the corporation's outstanding voting stock for a period of three years from the date the stockholder becomes an interested stockholder. 25 SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. OSI PHARMACEUTICALS, INC. By: /s/ROBERT L. VAN NOSTRAND ------------------------------------ Robert L. Van Nostrand Vice President and Chief Financial Officer Date: January 23, 2003 82 CERTIFICATION I, Colin Goddard, certify that: 1. I have reviewed this annual report on Form 10-K of OSI Pharmaceuticals, Inc.; 2. Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report; 3. Based on my knowledge, the financial statements, and other financial information included in this annual report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this annual report; 4. The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and have: (a) designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared; (b) evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this annual report (the "Evaluation Date"); and (c) presented in this annual report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date; 5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions): (a) all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and (b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls; and 6. The registrant's other certifying officers and I have indicated in this annual report whether there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. Date: January 23, 2003 /s/ COLIN GODDARD -------------------------------------- Colin Goddard Chief Executive Officer 83 CERTIFICATION I, Robert L. Van Nostrand, certify that: 1. I have reviewed this annual report on Form 10-K of OSI Pharmaceuticals, Inc.; 2. Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report; 3. Based on my knowledge, the financial statements, and other financial information included in this annual report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this annual report; 4. The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and have: (a) designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared; (b) evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this annual report (the "Evaluation Date"); and (c) presented in this annual report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date; 5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions): (a) all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and (b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls; and 6. The registrant's other certifying officers and I have indicated in this annual report whether there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. Date: January 23, 2003 /s/ ROBERT L. VAN NOSTRAND -------------------------------------- Robert L. Van Nostrand Vice President and Chief Financial Officer 84 INDEX TO EXHIBITS <Table> <Caption> EXHIBIT - ------- 2.1+ Asset Purchase Agreement, dated July 30, 1999, by and between Cadus Pharmaceutical Corporation and OSI Pharmaceuticals, Inc., filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended June 30, 1999 (file no. 000-15190), and incorporated herein by reference. 2.2 OSI Pharmaceuticals, Inc. Non-Qualified Stock Option Plan for Former Employees of Cadus Pharmaceutical Corporation, filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended June 30, 1999 (file no. 000-15190), and incorporated herein by reference. 2.3+ Asset Purchase Agreement, dated November 17, 1999, by and among OSI Pharmaceuticals, Inc., Oncogene Science Diagnostics, Inc., and Bayer Corporation, filed by the Company as an exhibit to the Form 8-K filed on December 15, 1999 (file no. 000-15190), and incorporated herein by reference. 2.4 Amendment No. 1 to Asset Purchase Agreement, dated November 30, 1999, by and among OSI Pharmaceuticals, Inc., Oncogene Science Diagnostics, Inc., and Bayer Corporation, filed by the Company as an exhibit to the Form 8-K filed on December 15, 1999 (file no. 000-15190), and incorporated herein by reference. 2.5 Asset Purchase Agreement, dated November 26, 2001, by and between OSI Pharmaceuticals, Inc. and Gilead Sciences, Inc. filed by the Company as an exhibit to the Form 8-K filed on December 11, 2001 (file no. 000-15190), and incorporated herein by reference. 2.6 OSI Pharmaceuticals, Inc. Non-Qualified Stock Option Plan for Former Employees of Gilead Sciences, Inc. filed by the Company as an exhibit to the Form 8-K filed on January 7, 2002 (file no. 000-15190), and incorporated herein by reference. 3.1 Certificate of Incorporation, as amended, filed by the Company as an exhibit to the Form 10-K for the fiscal year ended September 30, 2001 (file no. 000-15190), and incorporated herein by reference. 3.2 Amended and Restated Bylaws filed by the Company as an exhibit to the Form 10-K for the fiscal year ended September 30, 2001 (file no. 000-15190), and incorporated herein by reference. 4.1 Stock Purchase Agreements, dated February 24, 2000, by and between OSI Pharmaceuticals, Inc. and each of Biotechnology Value Fund L.P., American Variable Insurance Series Global Small Capitalization Fund, Asset Management Holding Co., Biotechnology Value Fund, II L.P., Chelsey Capital, Forstmann International Fund, LTD, Forstmann Partners, L.P., Galleon Healthcare Overseas, Ltd., Galleon Healthcare Partners, LP, International Biotechnology Trust PLC, Investment 10, L.L.C., Janus Investment Fund, Lone Balsam, L.P., Lone Cypress, LTD, Lone Sequoia, L.P., Lone Spruce, L.P., Merlin BioMed LP, Merlin BioMed Intl LTD, Moore Global Investments, Ltd., Remington Investment Strategies, L.P., Sands Point Partners, SMALLCAP World Fund, Inc., United Capital Management, Inc., and Ziff Asset Management, L.P., filed by the Company as exhibits to the Form 8-K filed on March 1, 2000 (file no. 000-15190), and incorporated herein by reference. 4.2 Rights Agreement, dated September 27, 2000, between OSI Pharmaceuticals, Inc. and The Bank of New York as Rights Agent, including Terms of Series SRP Junior Participating Preferred Stock, Summary of Rights to Purchase Preferred Stock and Form of Right Certificate, filed by the Company as an exhibit to the Form 8-A filed on September 27, 2000 (file no. 000-15190), and incorporated herein by reference. 4.3 Stock Purchase Agreement, dated January 8, 2001, by and between OSI Pharmaceuticals, Inc. and Genentech, Inc., filed by the Company as an exhibit to the Form 8-K filed on February 14, 2001 (file no. 000-15190), and incorporated herein by reference. 4.4 Stock Purchase Agreement, dated January 8, 2001, by and between OSI Pharmaceuticals, Inc. and Roche Holdings, Inc., filed by the Company as an exhibit to the Form 8-K filed on February 14, 2001 (file no. 000-15190), and incorporated herein by reference. </Table> <Table> <Caption> EXHIBIT - ------- 4.5 Investor Rights Agreement, dated December 21, 2001, by and between OSI Pharmaceuticals, Inc. and Gilead Sciences, Inc., filed by the Company as an exhibit to the Form 8-K filed on January 7, 2002 (file no. 000-15190) and incorporated herein by reference. 4.6 Indenture, dated February 1, 2002, by and between OSI Pharmaceuticals, Inc. and The Bank of New York, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-3 filed April 19, 2002 (file no. 333-86624), and incorporated herein by reference. 4.7 Form of 4% Convertible Senior Subordinated Note Due 2009 (included in Exhibit 4.6). 4.8 Registration Rights Agreements, dated February 1, 2002, by and among OSI Pharmaceuticals, Inc., Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith, Incorporated, Robertson Stephens, Inc., Adams, Harkness & Hill, Inc. and Lazard Freres & Co. LLC, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-3 filed April 19, 2002 (file no. 333-86624), and incorporated herein by reference. 10.1 1985 Stock Option Plan, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 33-8980), and incorporated herein by reference. 10.2 1989 Incentive and Non-Qualified Stock Option Plan, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 33-38443), and incorporated herein by reference. 10.3 1993 Employee Stock Purchase Plan, as amended, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 33-60182), and incorporated herein by reference. 10.4 1993 Incentive and Non-Qualified Stock Option Plan, as amended, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 33-64713) and incorporated herein by reference. 10.5 Stock Purchase Plan for Non-Employee Directors, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 333-06861), and incorporated herein by reference. 10.6 1995 Employee Stock Purchase Plan, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 333-06861), and incorporated herein by reference. 10.7 1997 Incentive and Non-Qualified Stock Option Plan, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 333-39509), and incorporated herein by reference. 10.8 1999 Incentive and Non-Qualified Stock Option Plan, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 333-42274), and incorporated herein by reference. 10.9 2001 Incentive and Non-Qualified Stock Option Plan, filed as an exhibit to OSI Pharmaceuticals, Inc.'s registration statement on Form S-8 (file no. 333-91118), and incorporated herein by reference. 10.10+ Collaborative Research Agreement, dated April 1, 1996, between OSI Pharmaceuticals, Inc. and Pfizer Inc., filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended March 31, 1996, as amended (file no. 000-15190), and incorporated herein by reference. 10.11+ License Agreement, dated April 1, 1996, between OSI Pharmaceuticals, Inc. and Pfizer Inc., filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended March 31, 1996, as amended (file no. 000-15190), and incorporated herein by reference. 10.12 Employment Agreement, dated April 30, 1998, between OSI Pharmaceuticals, Inc. and Colin Goddard, Ph.D., filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended June 30, 1998 (file no. 000-15190), and incorporated herein by reference. 10.13 Consulting Agreement, dated October 1, 1998, between OSI Pharmaceuticals, Inc. and Gary E. Frashier, filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended December 31, 1998 (file no. 000-15190), and incorporated herein by reference. 10.14+ Amended and Restated Collaborative Research Agreement, dated April 23, 1999, by and among Pfizer, Inc., OSI Pharmaceuticals, Inc. and Anaderm Research Corp., filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended June 30, 1999 (file no. 000-15190), and incorporated herein by reference. </Table> <Table> <Caption> EXHIBIT - ------- 10.15+ Collaborative Research, License and Alliance Agreement, dated August 31, 1999, by and between OSI Pharmaceuticals, Inc. and Vanderbilt University, filed by the Company as an exhibit to the Form 10-K for the fiscal year ended September 30, 1999 (file no. 000-15190), and incorporated herein by reference. 10.16+ Collaborative Research and License Agreement, dated October 1, 1999, by and between OSI Pharmaceuticals, Inc. and Tanabe Seiyaku Co. Ltd., filed by the Company as an exhibit to the Form 10-K for the fiscal year ended September 30, 1999 (file no. 000-15190), and incorporated herein by reference. 10.17 Yeast Technology Agreement, dated February 15, 2000, by and between OSI Pharmaceuticals, Inc. and Cadus Pharmaceutical Corporation, filed by the Company as an exhibit to the Form 10-Q for the fiscal quarter ended March 31, 2000 (file no. 000-15190), and incorporated herein by reference. 10.18 Agreement, dated May 23, 2000, by and between OSI Pharmaceuticals, Inc. and Pfizer Inc., filed by the Company as an exhibit to the Form 8-K filed on June 20, 2000 (file no. 000-15190), and incorporated herein by reference. 10.19 Employment Agreement, dated September 28, 2000, between OSI Pharmaceuticals, Inc. and Nicholas G. Bacopoulous, Ph.D., filed by the Company as an exhibit to the Form 10-K for the fiscal year ended September 30, 2000 (file no. 000-15190), and incorporated herein by reference. 10.20+ Development and Marketing Collaboration Agreement, dated January 8, 2001, between OSI Pharmaceuticals, Inc. and Genentech, Inc., filed by the Company as an exhibit to the Form 8-K filed on February 14, 2001 (file no. 000-15190), and incorporated herein by reference. 10.21+ Development Collaboration and Licensing Agreement, dated January 8, 2001, between OSI Pharmaceuticals, Inc. and F. Hoffman -- La Roche Ltd., filed by the Company as an exhibit to the Form 8-K filed on February 14, 2001 (file no. 000-15190), and incorporated herein by reference. 10.22+ Tripartite Agreement, dated January 8, 2001, by and among OSI Pharmaceuticals, Inc., Genentech, Inc., and F. Hoffman -- La Roche Ltd., filed by the Company as an exhibit to the Form 8-K filed on February 14, 2001 (file no. 000-15190), and incorporated herein by reference. 10.23+ Manufacturing Agreement, dated December 21, 2001, by and between OSI Pharmaceuticals, Inc. and Gilead Sciences, Inc. filed by the Company as an exhibit to the Form 8-K filed on January 7, 2002 (file no. 000-15190), and incorporated herein by reference. 21 Subsidiary of OSI Pharmaceuticals, Inc. (filed by the Company as an exhibit to the Form 10-K filed on December 12, 2002 (file no. 000-15190), and incorporated herein by reference). 23 Consent of KPMG LLP, independent public accountants (filed by the Company as an exhibit to the Form 10-K filed on December 12, 2002 (file no. 000-15190), and incorporated herein by reference). 99.1* Certification of Chief Executive Officer pursuant to 18 U.S.C. sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 99.2* Certification of Chief Financial Officer pursuant to 18 U.S.C. sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. </Table> - --------------- * Filed herewith. + Portions of this exhibit have been redacted and are subject to a confidential treatment request filed with the Secretary of the Securities and Exchange Commission pursuant to Rule 24b-2 under the Securities Exchange Act of 1934, as amended.