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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

For the fiscal year ended December 31, 2002

or

Commission File No. 0-27436

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

400 Oyster Point Blvd., Suite 505, South San Francisco, California 94080
(Address of principal executive offices, including zip code)

(650) 244-4990
(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
None

Securities registered pursuant to Section 12(g) of the Act:
Common Stock, $.001 par value

        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 twelve (12) months (or for such shorter period that the registrant was required to file such report(s)), and (2) has been subject to the filing requirements for the past ninety (90) days. Yes ý No o

        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. ý

        Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act). Yes o No ý

        The aggregate market value of the 21,836,334 shares of voting and non-voting common equity held by non-affiliates of the registrant based on the closing price on June 30, 2002 was $73.2 million.

        As of March 24, 2003, 27,642,085 shares of common stock, $.001 par value, of the registrant were issued and outstanding.

PART I

        Statements in this Form 10-K that are not descriptions of historical facts are forward-looking statements that are subject to risks and uncertainties. Actual results could differ materially from those currently anticipated due to a number of factors, including those set forth under "Risk Factors" including, but not limited to, the results of research and development efforts, the results of pre-clinical and clinical testing, the effect of regulation by the United States Food and Drug Administration (FDA) and other agencies, the impact of competitive products, product development, commercialization and technological difficulties, the results of financing efforts, the effect of our accounting policies, and other risks detailed in our Securities and Exchange Commission filings.

        Spheramine®, Pivanex®, Probuphine™, CeaVac®, TriAb®, TriGem™ and CCM™ are trademarks of Titan Pharmaceuticals, Inc. This Form 10-K also includes trade names and trademarks of companies other than Titan Pharmaceuticals, Inc.

Item 1. Business

(a)    General Development of Business

        Titan Pharmaceuticals, Inc. is a biopharmaceutical company developing proprietary therapeutics for the treatment of central nervous system (CNS) disorders, cancer, and other serious and life threatening diseases. Our product development programs focus on large pharmaceutical markets with significant unmet medical needs and commercial potential. We currently have eight products under development, with our internal resources focused primarily on clinical development of the following products:

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Spheramine: for the treatment of late stage Parkinson's disease.

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Pivanex: for the treatment of non-small cell lung cancer.

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Gallium maltolate: for the treatment of several cancers and bone related disease associated with cancer.

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Probuphine: for the treatment of opiate addiction.

        We are directly developing our product candidates and also utilizing strategic partnerships, including a collaboration with Schering AG (Schering), as well as collaborations with Novartis Pharma AG (Novartis), and with several government-sponsored clinical cooperative groups. These collaborations help fund product development and enable us to retain significant economic interest in our products.

        Following the announcement of clinical study results last year, discussed in detail later, we are continuing to evaluate opportunities for the continued development of iloperidone for the treatment of schizophrenia, and the monoclonal antibodies—CeaVac, TriAb, and TriGem—for the treatment of various cancers. These programs are focused on externally funded collaborations for further support and development. In addition, Spheramine development is primarily funded by our corporate partner for Spheramine, Schering AG.

        Titan was incorporated in Delaware in February 1992 and has been funded through various sources, including an initial public offering in January 1996 and private placements of securities, as well as proceeds from warrant and option exercises, corporate licensing and collaborative agreements, and government-sponsored research grants.

        Some of our product development work is conducted through our two consolidated subsidiaries: Ingenex, Inc., and ProNeura, Inc. References to us and our products throughout this document include the products under development by the two subsidiaries.

(b)    Financial Information About Industry Segments

        We operate in only one business segment, the development of pharmaceutical products.

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(c)    Narrative Description Of Business

Product Development Programs

        The following table provides summary status of our products in development:

*Further development under review

        The following four programs comprise Titan's primary internal development focus:

Spheramine—Parkinson's Disease

        We are engaged in the development of cell-based therapeutics for the treatment of neurologic diseases. Our first product under development utilizing a proprietary cell-coated microcarrier (CCM) technology is Spheramine for the treatment of Parkinson's disease. Our proprietary technology enables the development of cell-based therapies for minimally-invasive, site-specific delivery to the central nervous system of therapeutic factors precisely where they are needed in order to treat the neurologic disease.

        Spheramine consists of microcarriers coated with L-dopa-producing human retinal pigment epithelial cells that directly enhance brain levels of dopamine, a neurotransmitter deficient in certain brain regions in Parkinson's disease, leading to movement disorders. Preclinical studies have demonstrated the preliminary efficacy and safety of Spheramine, including blinded studies in a primate model of Parkinson's disease. Positron emission tomography (PET) imaging studies have confirmed the presence of increased dopamine signals in regions treated with Spheramine. A pilot clinical study of Spheramine performed by Titan in six patients with late-stage Parkinson's disease demonstrated substantial improvement (average 48%) in motor function in all six patients at one year post treatment with no significant adverse events. These results were reported at the American Academy of Neurology (AAN) annual meeting in 2002. Data from this study at two years post treatment continues to look very promising and will be presented at the AAN meeting in April 2003. In December 2002, we announced the initiation of a multicenter, randomized, blinded, controlled study of Spheramine in Parkinson's disease. The newly launched Phase IIb clinical study will enroll 68 patients with later-stage Parkinson's disease (Hoehn and Yahr Stages III and IV) to further evaluate the efficacy, safety, and

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tolerability of Spheramine. Schering AG, Germany, Titan's corporate partner for worldwide development and commercialization of Spheramine, is fully funding the clinical development program for Spheramine. Under this agreement, Schering received exclusive, worldwide development, manufacturing and commercialization rights, and, in addition to the clinical and manufacturing development funding and milestone payments, Schering will pay us a royalty on future product sales. In February 2002, Titan announced the receipt of a $2 million milestone payment from Schering following the successful completion of Titan's Phase I/II clinical study of Spheramine, and the decision by Schering to initiate larger, randomized clinical testing of Spheramine for the treatment of late-stage Parkinson's disease.

Pivanex

        Pivanex is a novel small molecule that acts by inhibiting key enzymes called histone deacetylases, which are responsible for changing the expression of cancer-related genes. By altering gene expression, Pivanex slows cancer cell growth and causes destruction of cancer cells. Unlike traditional chemotherapeutic drugs which often kill both cancer cells and normal cells, thereby causing systemic side effects such as anemia, nausea, vomiting and risk of infection, Pivanex's novel approach substantially spares normal cells while slowing the growth of cancer cells and causing cancer cells to undergo programmed cell death or apoptosis. In May 2002, we presented data at the American Society of Clinical Oncology Annual Meeting showing that Pivanex demonstrated clinical benefit and showed promise for treatment of refractory non-small cell lung cancer (NSCLC) in a recently completed Phase II study. In this multi-center, open-label study, 47 patients with advanced NSCLC who had failed prior chemotherapy were treated with Pivanex. Results showed disease stabilization of 12 weeks or more in 30 percent of all patients and responses in 4.3 percent. In 29 patients whose cancer had progressed after one or two prior chemotherapy regimens, one-year survival was 47 percent and median survival was 11.1 months. This compares well to historical data with the approved agent in this setting, docetaxel, in similar patient groups, where one-year survival was 37 percent and median survival was 7.5 months. In addition, patients treated with Pivanex in this preliminary Phase II study showed decreased pleural effusions, weight gain, decreased cough and resolution of hemoptysis. Pivanex was very well tolerated, without severe side effects such as nausea, vomiting and decreased blood cells seen with many current cancer treatments.

        In January 2003, we initiated a dose escalation study to assess the safety of Pivanex combined with docetaxel as a second line treatment of NSCLC, the objective of which is to establish a safe and effective dose to be used in a subsequent Phase IIb trial that will randomize 225 patients with advanced, refractory NSCLC to Pivanex plus docetaxel versus docetaxel alone. This study is expected to commence in mid 2003 with initial results available by the end of 2004.

Gallium Maltolate

        Gallium maltolate is an orally administered form of gallium, a semi-metallic element. Intravenously administered gallium has demonstrated preliminary evidence in independent studies of clinical activity in several cancers, including multiple myeloma, lymphoma, bladder cancer and prostate cancer. Intravenous gallium, as gallium nitrate, received FDA approval in 1991 for hypercalcemia of malignancy. Evidence suggests that gallium may combine the desirable properties of naturally concentrating at sites of malignancy and then acting at these sites to inhibit abnormal cell proliferation. Gallium maltolate has two distinct potential actions: directly targeting and killing cancer cells, and protecting bone from the effects of tumor metastasis. A key enzyme essential for DNA replication in cancer cells is ribonucleotide reductase, which is active when bound to ferric iron. Gallium concentrates in tumor tissues and by substituting for ferric iron inhibits the activity of ribonucleotide reductase. This action inhibits DNA synthesis and cancer cell growth.

        Gallium maltolate has already been shown to safely provide sustained blood levels of gallium for the potential treatment of cancer and other diseases. Titan is currently evaluating gallium maltolate in

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Phase I/II clinical studies in multiple myeloma, metastatic prostate cancer, metastatic bladder cancer and refractory lymphoma. A Phase II study in bone disease related to metastatic cancer is planned to be initiated in the second half of 2003.

Probuphine

        We are developing a sustained drug delivery technology with applications in the treatment of a number of neurologic disorders in which conventional treatment is limited by variability in blood drug levels and poor patient compliance. The technology consists of a polymeric drug delivery system that potentially can provide controlled drug release over extended periods (i.e., from three months to one year).

        Our first product based upon this delivery system is Probuphine, which is expected to provide therapeutic levels of buprenorphine for the treatment of opiate addiction. Buprenorphine has demonstrated effectiveness in clinical studies as an oral therapy in the treatment of opiate addiction and was recently approved for marketing in the U.S. In June 2002, we presented data at the International Conference on Pain and Chemical Dependency in New York demonstrating that Probuphine continuously delivered buprenorphine for eight months in preclinical studies. Based on these results, Titan plans to initiate clinical testing of Probuphine in the first half of 2003 in patients currently receiving oral buprenorphine therapy for opiate addiction. The product is implanted subcutaneously to provide systemic delivery as body fluids wash over the implant and the drug is released. This results in a more constant rate of release similar to intravenous administration. We believe that such long-term, linear release characteristics are highly desirable by avoiding peak and trough level dosing that poses problems for many CNS and other therapeutic agents.

        The status of additional programs is as follows:

Iloperidone—Schizophrenia and Related Psychotic Disorders

        Iloperidone has been evaluated in an extensive Phase III program comprising over 3,500 patients at more than 200 sites in 24 countries, administered and funded by Novartis. In three completed efficacy studies, iloperidone statistically significantly reduced the symptoms of schizophrenia compared to placebo. Iloperidone has also been investigated in three 12-month safety studies, which confirm safety and tolerability. Additionally, Novartis has completed a study in elderly patients with good results. Although iloperidone was considered safe in the above efficacy studies, it has shown a dose dependent increase in the QTc interval.

        The results of a study evaluating the potential effect of iloperidone on the EKG profile (QTc interval prolongation) of patients receiving the drug were announced in July 2002. The study indicated that there was a dose dependent increase in QTc interval and results for iloperidone were roughly comparable to that for ziprasidone, one of the currently marketed agents in the study. The FDA has concurred with this assessment and has indicated that one additional successful pivotal Phase III study is necessary to complete the efficacy data package prior to NDA submission. The QTc profile may potentially limit the opportunity of iloperidone as first line therapy for schizophrenia. Novartis is currently evaluating the next steps for the iloperidone program, which may include sublicensing the compound to another company, continuing iloperidone development, or returning the rights to Titan.

Immunotherapeutics

        Titan's monoclonal antibody therapeutics under development mimic specific antigens that are primarily present on the targeted cancer cell and are not commonly found on normal tissue. From a structural perspective, the antibody bears an epitope that is conformationally similar to the cancer antigen. When injected into a patient, the antibody serves as a trigger for the normal immune system's response to produce anti-cancer antibodies to attack cancer cells.

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        These products have each demonstrated a robust immune response in humans against antigens associated with colon cancer, breast cancer, ovarian cancer, small cell lung cancer, melanoma and other cancers. The products and programs are summarized below:

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CeaVac—The target epitope mimicked by the novel monoclonal antibody CeaVac, carcinoembryonic antigen (CEA), is present in the largest group of cancers, adenocarcinomas. When injected in humans, CeaVac can generate an immune response against CEA. In December 2002, we announced results of a Phase III randomized, placebo-controlled study of CeaVac in patients with metastatic colorectal cancer receiving chemotherapy with 5-fluorouracil (5-FU) and leucovorin. Preliminary analysis from the study demonstrated a trend toward overall survival improvement of approximately 2 to 3 months in patients receiving more than 5 doses of CeaVac versus placebo (modified intent-to-treat population) but failed to demonstrate a statistically significant improvement in the primary endpoint of survival in the overall efficacy evaluable population or intent-to-treat population. We are further evaluating the study results and may continue product development, if warranted, through externally supported collaborations.

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TriAb—TriAb is a novel monoclonal antibody that mimics an epitope on the Human Milk Fat Globule (HMFG) and when injected in humans, can generate an immune response against HMFG, a tumor antigen expressed in several cancers, such as breast, ovarian, colon, pancreatic and non-small cell lung cancer.

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TriGem—TriGem is a novel monoclonal antibody that has demonstrated the ability to generate an immune response against the GD2 ganglioside tumor antigen which is expressed on melanoma, small cell lung cancer, neuroblastoma and sarcoma.

        The cancer target antigens mimicked by CeaVac, TriAb and TriGem are prevalent in more than 50% of solid tumors, and in the case of several cancers more than one of these antigens is present. We are taking advantage of this opportunity by using more than one monoclonal antibody in the treatment of certain cancers. We have three clinical trials in progress that utilize combinations of CeaVac, TriAb and TriGem and are funded by the National Cancer Institute (NCI), specifically:

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A Phase II study conducted by the Radiation Therapy Oncology Group utilizing a combination of CeaVac and TriAb in patients with limited stage non-small cell lung cancer,

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A Phase II study conducted by the Cancer and Leukemia Group B utilizing a combination of CeaVac and TriAb in patients with resected Dukes D colorectal cancer, and

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A Phase II study conducted by the Southwest Oncology Group utilizing a combination of TriAb and TriGem in patients with small cell lung cancer.

        We have established several collaborations with government-sponsored clinical cooperative groups to help fund and develop our cancer immunotherapy products. At the present time, further clinical development of these products will be pursued through external support from third parties such as the NCI.

RB94 Therapy

        RB94 is a truncated variant of the Retinoblastoma (RB) gene, which encodes a tumor suppressor protein that has a critical role in regulating cell proliferation. The RB pathway is inactivated in the vast majority of cancers, and we believe that the RB94 gene product is significantly more effective at suppressing tumor cell growth and promoting tumor cell death than the full-length RB gene product.

        In June 2002, we presented data at the annual meeting of the American Society of Gene Therapy (ASGT) in Boston demonstrating that RB94 gene therapy has potent anti-tumor effects in a preclinical study of human pancreatic cancer. In addition, data was also presented in which RB94 was shown to synergize with the chemotherapeutic agent cisplatin in the treatment of head and neck cancer, as

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reported in a separate preclinical study. In August 2002, we published a study on the treatment of head and neck cancer with RB94 in the journal Cancer Research. In December 2002, we presented data on the down-regulation of telomerase activity and the shortening of telomeres by combined RB94 and cisplatin therapy in human head and neck squamous cell carcinoma at the American Association of Cancer Research special meeting on The Role of Telomeres and Telomerase in Cancer.

        We are currently reviewing a product development path for this product, especially in light of regulatory concerns with respect to the safety of gene therapy, and we expect further development will be funded through external collaborations and grants.

Sponsored Research and License Agreements

        We are a party to several agreements with research institutions, companies, universities and other entities for the performance of research and development activities and for the acquisition of licenses relating to such activities.

Spheramine and Other Cell Therapy Products

        In November 1992, we acquired an exclusive, worldwide license under certain U.S. and foreign patent applications relating to the CCM technology pursuant to a research and license agreement with New York University (NYU). The NYU agreement provides for the payment of royalties based on future net sales of products and processes incorporating the licensed technology, as well as a percentage of any income we receive from any sublicense thereof. We are also obligated to reimburse NYU for all costs and expenses incurred by NYU in filing, prosecuting and maintaining the licensed patents and patent applications. We must satisfy certain other terms and conditions of the NYU agreement in order to retain our license rights. These include, but are not limited to, the use of best efforts to bring licensed products to market as soon as commercially practicable and to diligently commercialize such products thereafter. In January 2000, we entered into a sublicense agreement with Schering granting Schering exclusive worldwide commercialization rights to Spheramine. Under the agreement, Schering and Titan will collaborate on manufacturing and clinical development of cell therapy for the treatment of Parkinson's disease. We will receive funding for development activities, as well as potential reimbursement of certain prior research and development expenses. Schering will fully fund, and manage in collaboration with us, all future pilot and pivotal clinical studies, and manufacturing and development activities. Schering will pay us a royalty on net sales of Spheramine. Schering may terminate this sublicense for any reason by providing us 90 days notice in advance.

Pivanex

        We have acquired, from Bar-Ilan Research and Development Co. Ltd., in Israel, an exclusive, worldwide license to an issued United States patent and certain foreign patents, and patent applications covering novel analogues of butyric acid owned by Bar-Ilan University and Kupat Hulim Health Insurance Institution. The Bar-Ilan agreement provides for the payment by us to Bar-Ilan of royalties based on net sales of products and processes incorporating the licensed technology, subject to minimum annual amounts commencing in 1995, as well as a percentage of any income derived from any sublicense of the licensed technology. We must also pay all costs and expenses incurred in patent prosecution and maintenance and use reasonable best efforts to bring any products developed under the Bar-Ilan agreement to market. Our minimum annual royalty payment to Bar-Ilan is $60,000.

Gallium Complexes

        In August 2000, through the acquisition of GeoMed, Inc., we acquired an exclusive worldwide license to make, use and sell products developed under the patent rights to the compositions and application of gallium complexes. Under this license agreement, we are required to make an annual license payment to Dr. Lawrence Bernstein, technology inventor, of $50,000, as well as royalty

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payments based on future net sales of products and processes incorporating the licensed technology. We must also pay all costs and expenses incurred in patent prosecution and maintenance.

Long-term Drug Delivery System

        In October 1995, we acquired from the Massachusetts Institute of Technology (MIT) an exclusive worldwide license to certain U.S. and foreign patents relating to the long-term drug delivery system. The exclusive nature of the MIT license is subject to certain conditions regarding timely performance of product development activities. We must also satisfy certain other usual terms and conditions set forth in the MIT license in order to retain our license rights, including payments of royalties based on sale of products and processes incorporating the licensed technology, as well as a percentage of income derived from sublicenses of the licensed technology.

Iloperidone

        In January 1997, we acquired an exclusive worldwide license under U.S. and foreign patents and patent applications relating to the use of iloperidone for the treatment of psychiatric and psychotic disorders and analgesia from Aventis SA (formerly Hoechst Marion Roussel, Inc.). The Aventis agreement provides for the payment of royalties on future net sales and requires us to satisfy certain other terms and conditions in order to retain our rights, all of which have been met to date. In November 1997, we granted a worldwide sublicense, except Japan, to Novartis under which Novartis will continue, at its expense, all further development of iloperidone. In April 2001, that sublicense was extended to include Japan. Novartis will make our milestone payments to Aventis during the life of the Novartis agreement, and will also pay to Aventis and Titan a royalty on future net sales of the product. The results of a QTc study evaluating the EKG profile of patients taking iloperidone announced in July 2002 found that iloperidone has a similar profile to ziprasidone (Geodon), an approved product. These results have significantly delayed the regulatory filings for this product. Under the provisions of this sublicense agreement, Novartis has the obligation to determine, within a reasonable period of time, the next steps for the iloperidone program, which may include sublicensing the compound to another company or returning the rights to Titan.

Immunotherapeutics

        In May 1996, we acquired an exclusive, worldwide license under certain United States and foreign patent and patent applications pursuant to a license agreement with the University of Kentucky Research Foundation. These patent and patent applications relate to the anti-idiotypic antibodies known as 3H1, 1A7 and 11D10 and their fragments, derivatives or analogues. The Kentucky agreement required us to fund research at the University of Kentucky at amounts agreed to on an annual basis for the five-year period ending November 14, 2001. The Kentucky agreement provides for the payment of certain license fees as well as royalties based on future net sales of licensed products by Titan or any sublicensees. We must also pay all costs and expenses incurred in obtaining and maintaining patents, and diligently pursue a vigorous development program for the products in order to maintain our license rights under the Kentucky agreement.

        In November 1998, we entered into an agreement with the Wistar Institute of Anatomy and Biology, a not-for-profit organization in Philadelphia, Pennsylvania, for a non-exclusive license under certain patents for the use of anti-idiotypic antibodies for the treatment of tumors. The Wistar agreement provides for the payment of certain license fees as well as royalties based on future net sales of licensed products. Our minimum annual royalty payment to Wistar is $30,000.

Gene Therapy Product—RB94

        In October 1992, we acquired an exclusive, worldwide license under United States and foreign patent applications assigned to Baylor College of Medicine relating to the RB gene and its truncated variant, RB94, including the use of the gene in conferring senescence to tumors. The Baylor license

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provides for royalties based on net sales of products and processes incorporating the licensed technology, subject to a minimum annual license payment of $36,000 and a percentage of sublicensing income arising from the license of such products and processes. Some of the additional conditions under the Baylor license require us to use reasonable best efforts to bring any products developed under the Baylor license to market, make timely payment of royalty fees, and pay all costs and expenses incurred in patent filing, prosecution and maintenance.

Patents and Proprietary Rights

        We have obtained rights to certain patents and patent applications relating to our proposed products and may, in the future, seek rights from third parties to additional patents and patent applications. We also rely on trade secrets and proprietary know-how, which we seek to protect, in part, by confidentiality agreements with employees, consultants, advisors, and others. For risks we face with respect to patents and proprietary rights, see "Risk Factors—We may be unable to protect our patents and proprietary rights."

Spheramine and Other Cell Therapy Products

        We are the exclusive licensee under a license agreement with NYU of certain U.S. and foreign patent applications relating to our CCM technology. The U.S. Patent and Trademark Office has issued four U.S. patents on the core subject material underlying the NYU license and an additional one relating to uses in delivery of gene therapy to the central nervous system. Patents have issued that cover certain aspects of our Spheramine product and its use, including four U.S. patents that will expire in 2010, 2014, 2015, and 2017, and one foreign patent that will expire in 2011. Patents have issued relating to aspects of our gene transfer technology, including one U.S. patent that will expire in 2016, and three foreign patents, two of which will expire in 2017 and one of which will expire in 2019. These dates do not include possible term extensions. Prosecution of various divisional and continuation applications and their foreign counterparts continues satisfactorily, although it is uncertain whether additional patents will be granted.

Pivanex

        We are the exclusive licensee under the Bar-Ilan agreement of an issued U.S. patent, expiring in 2010 unless extended, patents in major European countries and Japan expiring in 2008 unless extended, a Canadian patent expiring in 2011, a Hong Kong patent expiring in 2008, and an Israeli patent expiring in 2007, all relating to Pivanex and/or formulations and uses of Pivanex. We also have a U.S. patent application pending on certain aspects of Pivanex.

Gallium Complexes

        We are the exclusive licensee under the license agreement with Dr. Lawrence Bernstein of certain U.S. and foreign patents and patent applications relating to the gallium complexes. Nine U.S. patents and several foreign patents have issued that cover pharmaceutical compositions and methods of use for gallium complexes. Prosecution of other U.S. and foreign patent applications relating to this technology continues satisfactorily, although it is uncertain whether additional patents will be granted. Unless any terms are extended, patents in this family will begin to expire in 2009.

Long-term Drug Delivery System

        We are the exclusive licensee under the MIT license to three U.S. patents, expiring in 2007, 2009 and 2014, and certain European patents relating to a long-term drug delivery system, expiring in 2008 and 2010.

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Iloperidone

        We hold a license from Aventis under one issued U.S. patent and certain foreign patents relating to iloperidone and its methods of use. Our license is exclusive for use in the treatment of psychiatric disorders, psychotic disorders and analgesia. Unless its term is extended, the U.S. patent that covers certain aspects of our iloperidone product and its use will expire in 2011. Prosecution of various divisional and continuation applications and their foreign counterparts continues satisfactorily, although it is uncertain whether additional patents will be granted.

Immunotherapeutics

        We are the exclusive licensee under a license agreement with the University of Kentucky Research Foundation of certain U.S. and foreign patents and patent applications related to the anti-idiotype antibodies known as 3H1, 1A7 and 11D10 and their fragments, derivatives or analogues. U.S. and foreign patents have been issued that relate to aspects of these technologies. Prosecution of patent applications relating to these technologies continues satisfactorily, as does prosecution of various divisional and continuation applications and their foreign counterparts for all the antibodies, although it is uncertain whether additional patents will be granted. Patents that cover certain aspects of CeaVac (antibody 3H1) include two U.S. patents that will expire in 2014 and 2017, and three foreign patents, two of which will expire in 2015 and one of which will expire in 2017. Patents that cover certain aspects of TriGem (antibody 1A7) include five U.S. patents, four of which will expire in 2015 and one of which will expire in 2018, and one foreign patent which will expire in 2016. Patents that cover certain aspects of TriAb (antibody 11D10) include one U.S. patent which will expire in 2018 and one foreign patent which will expire in 2016. These dates do not include possible term extensions.

Gene Therapy Product—RB94

        We are the exclusive licensee under the Baylor license of U.S. and foreign patents and patent applications, two of which are U.S. patents expiring in 2013 and 2016 relating to p94Rb. In particular, the issued claims relate to nucleotide sequences encoding p94Rb, to vectors comprising such nucleotide sequences, to cells comprising such vectors, and to the use of such nucleotide sequences and vectors in suppressing the proliferation of tumor cells. We are aware of the existence of a certain European patent publication made available to the public prior to the filing date of the applications from which the two U.S. patents matured. One seeking to challenge the validity of certain claims of the above-mentioned patents could argue that this publication discloses a nucleotide sequence comprising a nucleotide sequence encoding p94Rb. Although the U.S. patents are entitled to a presumption of validity, it cannot be certain that the challenged claims will not be found to be invalid in view of the disclosure of this publication.

Competition

        The pharmaceutical and biotechnology industries are characterized by rapidly evolving technology and intense competition. Many companies of all sizes, including major pharmaceutical companies and specialized biotechnology companies, are engaged in the development and commercialization of therapeutic agents designed for the treatment of the same diseases and disorders that we target. Many of our competitors have substantially greater financial and other resources, larger research and development staffs and more experience in the regulatory approval process. Moreover, potential competitors have or may have patents or other rights that conflict with patents covering our technologies.

Spheramine

        With regard to Spheramine, we are aware of several new treatments for Parkinson's disease that are in pre-clinical and clinical development. Amgen Inc. is pursuing clinical trials in Parkinson's patients with glial derived neurotrophic factor (GDNF) and is collaborating with Medtronic, Inc. in its

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delivery to the central nervous system. In addition, several well-funded public and private companies, including StemCells, Inc., are actively pursuing alternative cell transplant technologies. Deep brain stimulation, also known as subthalmic stimulation is also a competing therapy for Parkinson's disease. The FDA has approved a stimulator device (Activa) manufactured by Medtronic, Inc., which is marketed in the U.S. We believe Spheramine may have potential competitive advantages to this therapy.

Pivanex

        We are aware of several other companies developing anticancer drugs that destroy cancer cells by the same mechanism as Pivanex. Companies that are known to have histone deacetylase inhibitors in preclinical or clinical development include Pfizer, Schering AG, Novartis, Fujisawa, Aton Pharma and MethylGene. None of these companies have products that are marketed. There is considerable scientific interest in histone deacetylase inhibitors as a category of cancer drugs and it is expected that competition in this segment will increase.

Gallium Complexes

        We are aware that intravenously administered gallium nitrate is approved to treat hypercalcemia related to malignancy and may have potential for treatment of certain cancers. Genta is marketing this product under the brand name Ganite™. Other intravenous products including the bisphosphonates are available or are in development in the U.S. or Europe to treat osteoporosis, Paget's disease, primary hyperparathyroidism, hypercalcemia of malignancy and metastatic bone disease. Our product, gallium maltolate, is an orally administered drug and may have potential advantages in the treatment of cancer as well as bone-related diseases. Genta is also developing oral gallium compounds to treat bone-losing conditions.

        In addition to the foregoing, colleges, universities, governmental agencies and other public and private research organizations are likely to continue to conduct research and are becoming more active in seeking patent protection and licensing arrangements to collect royalties for use of technology that they have developed, some of which may directly compete with the technologies being developed by us.

Long-term Drug Delivery System

        With regard to our long-term drug delivery system, we are aware of an implantable therapeutic system being developed by ALZA Corporation. Companies such as Medtronic, Inc. are developing implantable pumps that could be used to infuse drugs into the central nervous system. Additionally, Reckitt & Benckaiser, Inc. received FDA approval in 2002 for sublingual buprenorphine product (combined with naloxone) for the treatment of opiate dependence. This product, to be administered daily, might compete with our six-month implantable product for drug abuse.

Iloperidone

        With respect to iloperidone, several products categorized as atypical antipsychotics are already on the market. These products include Risperdal sold by Janssen Pharmaceuticals, Zyprexa sold by Eli Lilly, Clozaril sold by Novartis, Seroquel sold by AstraZeneca, Geodon sold by Pfizer, and Abilify sold by Bristol-Myers Squibb. Competition among these companies is already intense and iloperidone will face significant competition. The success of iloperidone will depend on how it can be differentiated from products already on the market on the basis of efficacy, side-effect profile, cost, availability of formulations and dose requirements, among other things.

Immunotherapeutics

        With regard to our immunotherapeutic products, we are aware of several companies involved in the development of cancer therapeutics that target the same cancers as our products. Such companies

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include Progenics Pharmaceutical Inc., Biomira Inc., AltaRex Corp., Genentech Inc., ImClone Systems Incorporated and GlaxoSmithKline plc.

Gene or Protein delivery therapeutics

        With regard to our RB94 product, we are aware of several development stage and established enterprises that are exploring the field of human gene and/or protein delivery or are actively engaged in research and development in this area, including Introgen Therapeutics, Inc., Targeted Genetics Corp. and Cell Genesys, Inc. We are aware of other commercial entities that have produced gene and/or protein products used in human trials. It is expected that competition in this field will intensify.

        See "Risk Factors—We face intense competition."

Manufacturing

        We utilize contract manufacturing organizations to manufacture our products for pre-clinical studies and clinical trials. While we have not introduced any products on the commercial market to date, at such time as we are ready to do so we will need to allocate additional resources to the manufacture of the products for commercial marketing. We do not have the facilities to manufacture these products in-house nor do we intend to establish our own manufacturing operation at this time. We currently plan to pursue collaborative arrangements regarding the manufacture of any products that we may successfully develop.

Government Regulation

        In order to obtain FDA approval of a new drug, a company generally must submit proof of purity, potency, safety and efficacy, among other regulatory standards. In most cases, such proof entails extensive clinical and pre-clinical laboratory tests.

        The procedure for obtaining FDA approval to market a new drug involves several steps. Initially, the manufacturer must conduct pre-clinical animal testing to demonstrate that the product does not pose an unreasonable risk to human subjects in clinical studies. Upon completion of such animal testing, an Investigational New Drug application, or IND, must be filed with the FDA before clinical studies may begin. An IND application consists of, among other things, information about the proposed clinical trials. Among the conditions for clinical studies and IND approval is the requirement that the prospective manufacturer's quality control and manufacturing procedures conform to current Good Manufacturing Practices (cGMP), which must be followed at all times. Once the IND is approved (or if FDA does not respond within 30 days), the clinical trials may begin.

        Human clinical trials on drugs are typically conducted in three sequential phases, although the phases may overlap. Phase I trials typically consist of testing the product in a small number of healthy volunteers or patients, primarily for safety in one or more doses. During Phase II, in addition to safety, dose selection and efficacy of the product is evaluated in up to several hundred patients and sometimes more. Phase III trials typically involve additional testing for safety and confirmation of efficacy in an expanded patient population at multiple test sites. The FDA may order the temporary or permanent discontinuation of a clinical trial at any time. In August 2001, we became aware of an error in product shipment to a physician sponsored open label clinical trial and voluntarily suspended product shipment to certain open label clinical trials with cancer immunotherapeutic products. We also notified the FDA and, in September 2001, Titan was issued a Form FDA 483 on observations resulting from a FDA inspection pertaining to shipping procedure deficiencies. We have implemented additional procedures that address all issues identified and the FDA has accepted our response to the clinical hold on certain open label studies, allowing us to commence shipment of product and treatment of patients in continuing open label trials.

        The results of the pre-clinical and clinical testing on new drugs, if successful, are submitted to the FDA in the form of a New Drug Application, or NDA. The NDA approval process requires substantial

11

time and effort and there can be no assurance that any approval will be granted on a timely basis, if at all. The FDA may refuse to approve an NDA if applicable regulatory requirements are not satisfied. Product approvals, if granted, may be withdrawn if compliance with regulatory standards is not maintained or problems occur following initial marketing.

        The FDA may also require post-marketing testing and surveillance of approved products, or place other conditions on their approvals. These requirements could cause it to be more difficult or expensive to sell the products, and could therefore restrict the commercial applications of such products. Product approvals may be withdrawn if compliance with regulatory standards is not maintained or if problems occur following initial marketing. With respect to patented products or technologies, delays imposed by the governmental approval process may materially reduce the period during which we will have the exclusive right to exploit such technologies.

        In addition, our gene therapy product candidate is subject to guidelines established by the National Institutes of Health (NIH), covering deliberate transfers of recombinant DNA into human subjects conducted within NIH laboratories or with NIH funds, which provides that such products must be approved by the NIH Director. The NIH has established the Recombinant DNA Advisory Committee which sets forth guidelines concerning approval of NIH-supported research involving the use of recombinant DNA. Although the jurisdiction of the NIH applies only when NIH-funded research or facilities are involved in any aspect of the protocol, the Advisory Committee encourages all gene transfer protocols to be submitted for its review. We intend to comply with the Advisory Committee and NIH guidelines.

        We believe we are in compliance with all material applicable regulatory requirements. However, see "Risk Factors—We must comply with extensive government regulations" for additional risks we face regarding regulatory requirements and compliance.

Foreign Regulatory Issues

        Sales of pharmaceutical products outside the United States are subject to foreign regulatory requirements that vary widely from country to country. Whether or not FDA approval has been obtained, approval of a product by a comparable regulatory authority of a foreign country must generally be obtained prior to the commencement of marketing in that country. Although the time required to obtain such approval may be longer or shorter than that required for FDA approval, the requirements for FDA approval are among the most detailed in the world and FDA approval generally takes longer than foreign regulatory approvals.

Employees

        We currently have 72 full-time employees. None of our employees are represented by a labor union. We have not experienced any work stoppages and consider our relations with our employees to be good. See "Risk Factors—We may not be able to retain our key management and scientific personnel."

12

Risk Factors

        Our business is subject to numerous risks.

        We have a history of operating losses and may never be profitable.    From our inception through December 31, 2002, we had an accumulated deficit of approximately $129.9 million. We will continue to incur losses for the foreseeable future as a result of the various costs associated with our research, development, financial, administrative, regulatory, and management activities. We may never achieve or sustain profitability.

        Our products are at various stages of development and may not be successfully developed or commercialized.    We do not currently have any products being sold on the commercial market. Our proposed products are at various stages of development, but all will require significant further capital expenditures, development, testing, and regulatory clearances prior to commercialization. We are subject to the risk that some or all of our proposed products:

•

will be found to be ineffective or unsafe;



•

will not receive necessary regulatory clearances;



•

will be unable to get to market in a timely manner;



•

will not be capable of being produced in commercial quantities at reasonable costs;



•

will not be successfully marketed; or



•

will not be widely accepted by the physician community.

        We may experience unanticipated problems relating to product development, testing, regulatory compliance, manufacturing, marketing and competition, and our costs and expenses could exceed current estimates. We cannot predict whether we will successfully develop and commercialize any products. Of our product candidates, iloperidone is furthest in development. The results of a study evaluating the EKG profile of patients taking iloperidone found that iloperidone appeared to prolong the cardiac QTc interval, potentially a cause for concern. While iloperidone was shown to have a similar QTc profile to ziprasidone (Geodon), an already approved product, these results have significantly delayed the regulatory filings for this product. Novartis is currently evaluating the next steps for the iloperidone program, which may include sublicensing the compound to another company or returning the rights to Titan. We cannot predict when, if ever, the development program for iloperidone will advance. Furthermore, we recently announced study results with respect to a CeaVac trial that have a negative impact on the near-term commercial opportunity for this product and, accordingly, have determined to curtail our internal activities in this area.

        Our Spheramine product is based upon new technology which may be risky and fail to show efficacy. We are not aware of any other cell therapy products for CNS disorders that have been approved by the FDA or any similar foreign government entity and cannot assure you that we will be able to obtain the required regulatory approvals for any products based upon such technology.

        We must comply with extensive government regulations.    Our research, development, pre-clinical and clinical trial activities and the manufacture and marketing of any products that we may successfully develop are subject to an extensive regulatory approval process by the FDA and other regulatory agencies in the U.S. and other countries. The process of obtaining required regulatory approvals for drugs, including conducting pre-clinical and clinical testing to determine safety and efficacy, is lengthy, expensive and uncertain. Even after such time and expenditures, we may not obtain necessary regulatory approvals for clinical testing or for the manufacturing or marketing of any products. We have limited experience in obtaining FDA approval. Regulatory approval may entail limitations on the indicated usage of a drug, which may reduce the drug's market potential. Even if regulatory clearance is obtained, post-market evaluation of the products, if required, could result in restrictions on a product's marketing or withdrawal of the product from the market as well as possible civil and criminal

13

sanctions. We depend on third-party laboratories and medical institutions to conduct pre-clinical studies and clinical trials for our products and other third-party organizations to perform data collection and analysis, all of which must maintain both good laboratory and good clinical practices. We will also depend upon third party manufacturers for the production of any products we may successfully develop to comply with current Good Manufacturing Practices, which are similarly outside our direct control.

        Our regulatory submissions may be delayed or we may cancel plans to make submissions for proposed products for a number of reasons, including:

•

unanticipated pre-clinical testing or clinical trial reports;



•

changes in regulations or the adoption of new regulations;



•

unanticipated enforcement of existing regulations;



•

unexpected technological developments; and



•

developments by our competitors.

        Consequently, we cannot assure you that we will make our submissions promptly, or at all, or that our submissions will meet the approval from the FDA. If our corporate partners and we are unable to obtain regulatory approval for our products, our business will be seriously harmed.

        In addition, we and our collaborative partners may be subject to regulation under state and federal laws, including requirements regarding occupational safety, laboratory practices, environmental protection and hazardous substance control, and may be subject to other local, state, federal and foreign regulation. We cannot predict the impact of such regulation on us, although it could seriously harm our business.

        We face many uncertainties relating to our human clinical trial strategy and results.    In order to obtain the regulatory approvals that we need to commercialize any of our product candidates, we must demonstrate that each product candidate is safe and effective for use in humans for each target indication. Two of our product candidates have reached Phase III human clinical trials, however results from the studies have not supported a regulatory filing. Several other product candidates are currently advancing into Phase II human clinical trials. We may not be able to demonstrate that any of our product candidates will be safe or effective in advanced trials that involve larger numbers of patients. Clinical trials are subject to oversight by institutional review boards and the FDA and:

•

must be conducted in conformance with the FDA's good laboratory practice regulations;



•

must meet requirements for institutional review board oversight;



•

must meet requirements for informed consent;



•

must meet requirements for good clinical practices;



•

are subject to continuing FDA oversight; and



•

may require large numbers of test subjects.

        Our product development programs have in the past been and may in the future be curtailed, redirected or eliminated at any time for some or all of the following reasons:

•

unanticipated, adverse or ambiguous results;



•

undesirable side effects which delay or extend the trials;



•

our inability to locate, recruit and qualify a sufficient number of patients for our trials;



•

regulatory delays or other regulatory actions;



•

difficulties in manufacturing sufficient quantities of the particular product candidate or any other components needed for our pre-clinical testing or clinical trials;



•

change in the focus of our development efforts; and

14

•

reevaluation of our clinical development strategy.

        Accordingly, our clinical trials may not proceed as anticipated or otherwise adequately support our applications for regulatory approval.

        We face an inherent risk of clinical trial liability claims in the event that the use or misuse of our product candidates results in personal injury or death. Our clinical liability insurance coverage may not be sufficient to cover claims that may be made against us. Any claims against us, regardless of their merit, could severely harm our financial condition, strain our management and other resources or adversely impact or destroy the prospects for commercialization of the product which is the subject of any such claim.

        We may be unable to protect our patents and proprietary rights.    Our future success will depend to a significant extent on our ability to:

•

obtain and keep patent protection for our products and technologies on an international basis;



•

enforce our patents to prevent others from using our inventions;



•

maintain and prevent others from using our trade secrets; and



•

operate and commercialize products without infringing on the patents or proprietary rights of others.

        We cannot assure you that our patent rights will afford any competitive advantages, and these rights may be challenged or circumvented by third parties. Further, patents may not be issued on any of our pending patent applications in the U.S. or abroad. Because of the extensive time required for development, testing and regulatory review of a potential product, it is possible that before a potential product can be commercialized, any related patent may expire, or remain in existence for only a short period following commercialization, reducing or eliminating any advantage of the patent.

        If we sue others for infringing our patents, a court may determine that such patents are invalid or unenforceable. Even if the validity of our patent rights is upheld by a court, a court may not prevent the alleged infringement of our patent rights on the grounds that such activity is not covered by our patent claims.

        In addition, third parties may sue us for infringing their patents. In the event of a successful claim of infringement against us, we may be required to:

•

pay substantial damages;



•

stop using our technologies and methods;



•

stop certain research and development efforts;



•

develop non-infringing products or methods; and



•

obtain one or more licenses from third parties.

        If required, we cannot assure you that we will be able to obtain such licenses on acceptable terms, or at all. If we are sued for infringement, we could encounter substantial delays in development, manufacture and commercialization of our product candidates. Any litigation, whether to enforce our patent rights or to defend against allegations that we infringe third party rights, will be costly, time consuming, and may distract management from other important tasks.

        As is commonplace in the biotechnology and pharmaceutical industry, we employ individuals who were previously employed at other biotechnology or pharmaceutical companies, including our competitors or potential competitors. To the extent our employees are involved in research areas which are similar to those areas in which they were involved at their former employers, we may be subject to claims that such employees and/or we have inadvertently or otherwise used or disclosed the alleged trade secrets or other proprietary information of the former employers. Litigation may be necessary to

15

defend against such claims, which could result in substantial costs and be a distraction to management and which may have a material adverse effect on us, even if we are successful in defending such claims.

        We also rely in our business on trade secrets, know-how and other proprietary information. We seek to protect this information, in part, through the use of confidentiality agreements with employees, consultants, advisors and others. Nonetheless, we cannot assure you that those agreements will provide adequate protection for our trade secrets, know-how or other proprietary information and prevent their unauthorized use or disclosure. To the extent that consultants, key employees or other third parties apply technological information independently developed by them or by others to our proposed products, disputes may arise as to the proprietary rights to such information, which may not be resolved in our favor. Most of our consultants are employed by, or have consulting agreements with, third parties and any inventions discovered by such individuals generally will not become our property. There is a risk that other parties may breach confidentiality agreements or that our trade secrets may become known or independently discovered by competitors, which could adversely affect us.

        We face intense competition.    Competition in the pharmaceutical and biotechnology industries is intense. We face, and will continue to face, competition from numerous companies that currently market, or are developing, products for the treatment of the diseases and disorders we have targeted. Many of these entities have significantly greater research and development capabilities, experience in obtaining regulatory approvals and manufacturing, marketing, financial and managerial resources than we have. We also compete with universities and other research institutions in the development of products, technologies and processes, as well as the recruitment of highly qualified personnel. Our competitors may succeed in developing technologies or products that are more effective than the ones we have under development or that render our proposed products or technologies noncompetitive or obsolete. In addition, certain of such competitors may achieve product commercialization or patent protection earlier than us. Please see "Competition Section" for additional details.

        We are dependent upon our key collaborative relationships and license and sponsored research agreements.    As a company with limited resources, we rely significantly on the resources of third parties to conduct research and development and complete the regulatory approval process on our behalf. For example, our ability to ultimately derive revenues from iloperidone is almost entirely dependent upon Novartis or a new corporate partner conducting the Phase III trials and completing the regulatory approval process and implementing the marketing program necessary to commercialize iloperidone if the product is approved by the FDA. We are similarly dependent upon Schering, our collaborator for the development and commercialization of Spheramine. Beyond our contractual rights, we cannot control the amount or timing of resources that any existing or future corporate partner devotes to product development and commercialization efforts for our product candidates. In addition, we also receive substantial government funding for our cancer immunotherapeutic programs. We cannot assure you that we will continue to receive such governmental funding. If such funds are no longer available, some of our current and future development efforts may be delayed or terminated. We depend on our ability to maintain existing collaborative relationships, to develop new collaborative relationships with third parties and to acquire or in-license additional products and technologies for the development of new product candidates. We cannot assure you that we will be able to maintain or develop new collaborative relationships, or that any such third-party products or technology will be available on acceptable terms, if at all.

        Conflicts with our collaborators and strategic partners could have an adverse impact on our relationships with them and impair our ability to enter into future collaborations, either of which could seriously harm our business. Our collaborators have, and may, to the extent permitted by our agreements, develop competing products, preclude us from entering into collaborations with their competitors or terminate their agreements with us prematurely. Moreover, disagreements could arise with our collaborators or strategic partners over rights to our intellectual property and our rights to share in any of the future revenues from products or technologies resulting from use of our

16

technologies, or our activities in separate fields may conflict with other business plans of our collaborators.

        We must meet payment and other obligations under our license and sponsored research agreement.    Our license agreements relating to the in-licensing of technology generally require the payment of up-front license fees and royalties based on sales with minimum annual royalties, the use of due diligence in developing and bringing products to market, the achievement of funding milestones and, in some cases, the grant of stock to the licensor. Our sponsored research agreements generally require periodic payments on an annual or quarterly basis. Our failure to meet financial or other obligations under license or sponsored research agreements in a timely manner could result in the loss of our rights to proprietary technology or our right to have the applicable university or institution conduct research and development efforts.

        We may be dependent upon third parties to manufacture and market any products we successfully develop.    We currently do not have the resources or capacity to commercially manufacture or directly market any of our proposed products. Collaborative arrangements may be pursued regarding the manufacture and marketing of any products that may be successfully developed. We may be unable to enter into additional collaborative arrangements to manufacture or market any proposed products or, in lieu thereof, establish our own manufacturing operations or sales force.

        Healthcare reform and restrictions on reimbursements may limit our financial returns.    Our ability or the ability of our collaborators to commercialize drug products, if any, may depend in part on the extent to which government health administration authorities, private health insurers and other organizations will reimburse consumers for the cost of these products. These third parties are increasingly challenging both the need for and the price of new drug products. Significant uncertainty exists as to the reimbursement status of newly approved therapeutics. Adequate third party reimbursement may not be available for our own or our collaborator's drug products to enable us or them to maintain price levels sufficient to realize an appropriate return on their and our investments in research and product development. We cannot predict the effect that changes in the healthcare system may have on our business and these changes adversely affect our business.

        We may encounter difficulties managing our growth, which could adversely affect our results of operations.    Our success will depend on our ability to expand and manage our growth. We may not be able to manage our growth, to meet the staffing requirements of additional collaborative relationships or successfully assimilate and train new employees. If we continue to grow, our existing management skills and systems may not be adequate and we may not be able to manage any additional growth effectively. If we fail to achieve any of these goals, there could be a material adverse effect on our business, financial condition or results of operations.

        We may not be able to retain our key management and scientific personnel.    As a company with a limited number of personnel, we are highly dependent on the services of Dr. Louis R. Bucalo, our Chairman, President and Chief Executive Officer, Dr. Frank Valone, Executive Vice President of Clinical Development and Regulatory Affairs, as well as the other principal members of our management and scientific staff. The loss of one or more of such individuals could substantially impair ongoing research and development programs and could hinder our ability to obtain corporate partners. Our success depends in large part upon our ability to attract and retain highly qualified personnel. We compete in our hiring efforts with other pharmaceutical and biotechnology companies, as well as universities and nonprofit research organizations, and we may have to pay higher salaries to attract and retain personnel.

        We may need additional financing.    At December 31, 2002, we had approximately $73.5 million of cash, cash equivalents, and marketable securities that we believe will enable us to fund our operations through 2005. We may need to seek additional financing to continue our product development activities, and will be required to obtain substantial funding to commercialize any products other than

17

Spheramine that we may successfully develop. We do not have any funding commitments or arrangements. If we are unable to generate adequate revenues, enter into a corporate collaboration, complete a debt or equity offering, or otherwise obtain sufficient financing when and if needed, we may be required to reduce, defer or discontinue one or more of our product development programs.

        Future sales of our common stock in the public market could adversely impact our stock price.    Future sales of our common stock by existing stockholders pursuant to Rule 144 under the Securities Act, pursuant to an effective registration statement or otherwise, could have an adverse effect on the price of our securities.

        Our stock price has been and will likely continue to be volatile.    Our stock price has experienced substantial fluctuations and could continue to fluctuate significantly due to a number of factors, including:

•

variations in our anticipated or actual operating results;



•

sales of substantial amounts of our stock;



•

announcements about us or about our competitors, including introductions of new products;



•

litigation and other developments relating to our patents or other proprietary rights or those of our competitors;



•

conditions in the pharmaceutical or biotechnology industries;



•

governmental regulation and legislation; and



•

change in securities analysts' estimates of our performance, or our failure to meet analysts' expectations.

        Many of these factors are beyond our control.

        In addition, the stock markets in general, and the American Stock Exchange and the market for pharmaceutical and biotechnological companies in particular, have experienced extreme price and volume fluctuations recently. These fluctuations often have been unrelated or disproportionate to the operating performance of these companies. These broad market and industry factors may adversely affect the market price of our common stock, regardless of our actual operating performance.

        In the past, companies that have experienced volatility in the market prices of their stock have been the object of securities class action litigation. If we were the object of securities class action litigation, it could result in substantial costs and a diversion of management's attention and resources.

Item 2. Properties

        We have a five-year operating lease, expiring in June 2007, for approximately 22,595 square feet of office space in South San Francisco, California. We also have a five-year lease, expiring in October 2003, for approximately 4,200 square feet of office and laboratory space in Somerville, New Jersey.

Item 3. Legal Proceedings

        Not applicable

Item 4. Submission of Matters to a Vote of Security Holders

        Not applicable

18

PART II

Item 5. Market for Registrant's Common Equity and Related Stockholder Matters.

(a)    Price Range of Securities

        Our common stock trades on the American Stock Exchange under the symbol TTP. The table below sets forth the high and low sales prices of our common stock as reported by the American Stock Exchange for the periods indicated.

(b)    Approximate Number of Equity Security Holders

        The number of record holders of our common stock as of March 24, 2003 was approximately 166. Based on the last ADP search, we believe there are in excess of 12,000 beneficial holders of our common stock.

(c)    Dividends

        We have never paid a cash dividend on our common stock and anticipate that for the foreseeable future any earnings will be retained for use in our business and, accordingly, do not anticipate the payment of cash dividends.

19

Item 6. Selected Financial Data

        The selected financial data presented below summarizes certain financial data which has been derived from and should be read in conjunction with our consolidated financial statements and footnotes thereto included in the section beginning on page F-1. See also "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."

(1)

Revenues for 2001 include $2.5 million license fee payment from Novartis for the development and commercialization of iloperidone in Japan.

(2)

Acquired in-process research and development reflects the acquisition of GeoMed in 2000, and the acquisition of a minority interest in Theracell in 1999.

20

Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

        The following discussion should be read in conjunction with the Consolidated Financial Statements and Notes thereto beginning on page F-1 in this report.

        The following discussion contains certain forward-looking statements, within the meaning of the "safe harbor" provisions of the Private Securities Reform Act of 1995, the attainment of which involves various risks and uncertainties. Forward-looking statements may be identified by the use of forward-looking terminology such as "may," "will," "expect," "believe," "estimate," "plan," "anticipate," "continue," or similar terms, variations of those terms or the negative of those terms. Our actual results may differ materially from those described in these forward-looking statements due to, among other factors, the results of ongoing research and development activities and pre-clinical testing, the results of clinical trials and the availability of additional financing through corporate partnering arrangements or otherwise.

        Spheramine®, Pivanex®, Probuphine™, CeaVac®, TriAb®, TriGem™ and CCM™ are trademarks of Titan Pharmaceuticals, Inc.

Overview

        We are a biopharmaceutical company developing proprietary therapeutics for the treatment of central nervous system disorders, cancer, and other serious and life threatening diseases. Our product development programs focus on large pharmaceutical markets with significant unmet medical needs and commercial potential.

        We currently have eight products under development, with our internal resources focused primarily on clinical development of the following products:

•

Spheramine: for the treatment of late stage Parkinson's disease.



•

Pivanex: for the treatment of non-small cell lung cancer.



•

Gallium maltolate: for the treatment of several cancers and bone related disease associated with cancer.



•

Probuphine: for the treatment of opiate addiction.

        We are directly developing our product candidates and also utilizing strategic partnerships, including a collaboration with Schering AG (Schering), as well as collaborations with Novartis Pharma AG (Novartis), and with several government-sponsored clinical cooperative groups. These collaborations help fund product development and enable us to retain significant economic interest in our products.

        Following the announcement of clinical study results last year, discussed previously herein, we are continuing to evaluate opportunities for the continued development of iloperidone for the treatment of schizophrenia, and the monoclonal antibodies—CeaVac, TriAb, and TriGem—for the treatment of various cancers. These programs are focused on externally funded collaborations for further support and development. In addition, Spheramine development is primarily funded by our corporate partner for Spheramine, Schering AG.

21

        The following table provides summary status of our products in development:

*Further development under review

        For additional information on these product development programs, see Item 1(c) "Narrative Description of Business" section.

        Our products are at various stages of development and may not be successfully developed or commercialized. We do not currently have any products being sold on the commercial market. Our proposed products will require significant further capital expenditures, development, testing, and regulatory clearances prior to commercialization. We may experience unanticipated problems relating to product development and cannot predict whether we will successfully develop and commercialize any products. An estimation of product completion dates and completion costs can vary significantly for each product and are difficult to predict. Various statutes and regulations also influence our product development progress and the success of obtaining approval is highly uncertain. For a full discussion of risks and uncertainties in our product development, see "Risk Factors—Our products are at various stages of development and may not be successfully developed or commercialized."

Critical Accounting Policies and the Use of Estimates

        The preparation of our financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. Actual results could differ materially from those estimates. We believe the following accounting policies and estimates for the year ended December 31, 2002, to be critical:

•

Revenue associated with performance milestones, considered "at risk" until the milestones are completed, is recognized based on the achievement of the milestones, as defined in the respective agreements. Advance payments received prior to the achievement of milestones are classified as deferred revenue until earned. We recognized a $2.0 million milestone payment from Schering AG following Schering's decision in the first quarter 2002 to initiate larger, randomized clinical testing of Spheramine for the treatment of patients with late-stage

22

Parkinson's disease upon the successful completion of Titan's Phase I/II clinical study of Spheramine. We had no further obligations to perform under the agreement relating to this milestone and therefore recognized the milestone as revenue.

•

We have elected to continue to follow Accounting Principles Board Opinion No. 25 (or APB 25), "Accounting for Stock Issued to Employees," to account for employee stock options because the alternative fair value method of accounting prescribed by Statement of Financial Accounting Standards No. 123 (or SFAS 123), "Accounting for Stock-Based Compensation," requires the use of option valuation models that were not developed for use in valuing employee stock options. Under APB 25, no compensation expense is recognized when the exercise price of our employee stock options equals the market price of the underlying stock on the date of grant. Had we elected to follow SFAS 123 and to apply the fair value method to stock-based employee compensation, we would have recorded an additional $8.2 million in net loss, or an additional $0.30 of net loss per share for the year ended December 31, 2002.

Results of Operations

Comparison of Years Ended December 31, 2002 and 2001

        Revenues in 2002 were $2.9 million compared to $4.6 million for 2001, a decrease of $1.7 million. The 2002 revenue included a one-time $2 million milestone payment from Schering AG following successful completion of the Phase I/II study and Schering's decision to initiate randomized clinical testing of Spheramine for the treatment of patients with late-stage Parkinson's disease (See Note 7 to the Consolidated Financial Statements beginning on page F-1 in this report). The 2001 revenue included a one-time license fee payment of $2.5 million received from Novartis for the development and commercialization of iloperidone in Japan, and an SBIR grant received from the National Institutes of Health in support of the development of Spheramine.

        Research and development expenses for 2002 were $29.8 million compared to $23.3 million for 2001, an increase of $6.5 million. The increase in research and development was primarily associated with the completion of the randomized, placebo-controlled Phase III clinical study of CeaVac in Dukes' D colorectal cancer and our other expanded clinical programs in cancer, specifically the Phase II studies with Pivanex and the Phase I/II study with gallium maltolate. Research and development expenses are expected to decrease approximately 25% annually due to the fact that a larger portion of the clinical studies conducted by the Company will be funded by third parties, including Schering AG, the Company's corporate partner for the development of Spheramine, and the National Cancer Institute, which is funding various clinical studies of CeaVac, TriAb, and TriGem in cancer.

        General and administrative expenses for 2002 were $5.1 million compared to $5.4 million for 2001, a decrease of $300,000. The decrease was primarily due to lower stock option related non-cash compensation expenses. We expect G&A costs to remain approximately the same in the future.

        Other income, net, for 2002 was $3.8 million compared to $6.7 million for 2001, a decrease of $2.9 million. The decrease, primarily in interest income, was a result of declining interest rates and our smaller average cash and marketable securities position.

        As a result of the foregoing, we had a net loss of $28.2 million in 2002 compared to a net loss of $17.5 million in 2001.

        None of our products have been commercialized, and we do not expect to generate any revenue from product sales or royalties in the foreseeable future. We will also continue to identify new technologies and/or product candidates for possible in-licensing or acquisition. Accordingly, we expect to incur operating losses for the foreseeable future. We cannot assure you that we will ever achieve profitable operations.

23

Comparison of Years Ended December 31, 2001 and 2000

        Revenues in 2001 were $4.6 million compared to $1.9 million for 2000, an increase of $2.7 million. The increase in revenue was primarily due to a $2.5 million license fee payment from Novartis for the development and commercialization of iloperidone in Japan, and higher SBIR grant revenues from the National Institutes of Health in support of the development of Spheramine, our novel treatment for Parkinson's disease. See Note 6 to the Consolidated Financial Statements beginning on page F-1 in this report.

        Research and development expenses for 2001 were $23.3 million compared to $16.7 million for 2000, an increase of $6.6 million. The planned increase in research and development is associated with our expanded clinical programs in cancer, specifically the ongoing randomized, placebo-controlled Phase III clinical study of CeaVac in Dukes D colorectal cancer, Phase II studies with Pivanex, Phase I/II study with Spheramine and Phase I/II study with gallium maltolate.

        General and administrative expenses for 2001 were $5.4 million compared to $4.1 million for 2000, an increase of $1.3 million. The increase, consisting primarily of salaries and employment-related costs, was in support of our expanded clinical and pre-clinical operations and certain stock option related non-cash compensation charges.

        Other income, net, for 2001 was $6.7 million compared to $5.1 million for 2000, an increase of $1.6 million. The increase, primarily in interest income, was a result of our significantly larger average cash and marketable securities position.

        As a result of the foregoing, we had a net loss of $17.5 million in 2001 compared to a net loss of $18.8 million in 2000.

Liquidity and Capital Resources

        We have funded our operations since inception primarily through sales of our securities, as well as proceeds from warrant and option exercises, corporate licensing and collaborative agreements, and government sponsored research grants.

        In November 2000, we completed a private placement of 1.2 million shares of our common stock for net proceeds of approximately $40.9 million, after deducting fees and commissions and other expenses of the offering.

        In March 2000, we completed a private placement of 1.2 million shares of our common stock for net proceeds of approximately $38.8 million, after deducting fees and commissions and other expenses of the offering.

        Uses of cash in operating activities were primarily to fund product development programs and administrative expenses. We have entered into various agreements with research institutions, universities, and other entities for the performance of research and development activities and for the acquisition of licenses related to those activities. Certain of the licenses require us to pay royalties on

24

future product sales, if any. In addition, in order to maintain license and other rights while products are under development, we must comply with customary licensee obligations, including the payment of patent related costs and meeting project-funding milestones.

        The following table sets forth the aggregate contractual cash obligations as of December 31, 2002 (in thousands):

        We expect to continue to incur substantial additional operating losses from costs related to continuation and expansion of product and technology development, clinical trials, and administrative activities. We believe that we currently have sufficient working capital to sustain our planned operations through 2005.

Off Balance Sheet Arrangements

        Titan has never entered into any off-balance sheet financing arrangements and has never established any special purpose entities. We have not guaranteed any debt or commitments of other entities or entered into any options on non-financial assets.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

        Our portfolio of marketable securities creates an exposure to interest rate risk. We adhere to an investment policy that requires us to limit amounts invested in securities based on maturity, type of instrument, investment grade and issuer. We satisfy liquidity requirements by investing excess cash in securities with different maturities to match projected cash needs and limit concentration of credit risk by diversifying our investments among a variety of high credit-quality issuers. A hypothetical 100 basis point decrease in interest rates would result in an approximate $712K decrease in cash flow over the subsequent year. We do not use derivative financial instruments in our investment portfolio.

        The following table summarizes principal amounts and related weighted-average interest rates by year of maturity on our interest-bearing investment portfolio at December 31, 2002 (in thousands, except interest rate):

Item 8. Consolidated Financial Statements and Supplementary Data.

        The response to this item is included in a separate section of this Report. See "Index to Consolidated Financial Statements" on Page F-1.

Item 9. Changes and Disagreements with Accountants on Accounting and Financial Disclosure.

        Not applicable.

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PART III

Item 10. Directors and Executive Officers of Registrant.

        The following table sets forth the names, ages and positions of our executive officers and directors.

(1)

Member of Executive Committee

(2)

Member of Audit Committee

(3)

Member of Compensation Committee

        Louis R. Bucalo, M.D. is the founder of Titan and has served as our President and Chief Executive Officer since January 1993. Dr. Bucalo has served as a director of Titan since March 1993 and was elected Chairman of the Board of Directors in January 2000. From July 1990 to April 1992, Dr. Bucalo was Associate Director of Clinical Research at Genentech, Inc., a biotechnology company. Dr. Bucalo holds an M.D. from Stanford University and a B.A. in biochemistry from Harvard University.

        Sunil Bhonsle has served as our Executive Vice President and Chief Operating Officer since September 1995. Mr. Bhonsle served in various positions, including Vice President and General Manager-Plasma Supply and Manager-Inventory and Technical Planning, at Bayer Corporation from July 1975 until April 1995. Mr. Bhonsle holds an M.B.A. from the University of California at Berkeley and a B.Tech. in chemical engineering from the Indian Institute of Technology.

        Richard C. Allen, Ph.D., has served as our Executive Vice President, Cell Therapy, since August 1995. From January 1995 until it was merged into Titan in March 1999, he also served as President and Chief Executive Officer of Theracell, Inc. From June 1991 until December 1994, Dr. Allen was Vice President and General Manager of the Neuroscience Strategic Business Unit of Hoechst-Roussel Pharmaceuticals, Inc. Dr. Allen holds a Ph.D. in medicinal chemistry and a B.S. in pharmacy from the Medical College of Virginia.

        Robert E. Farrell has served as our Executive Vice President and Chief Financial Officer since September 1996. Mr. Farrell was employed by Fresenius USA, Inc. from 1991 until August 1996 where he served in various capacities, including Vice President Administration, Chief Financial Officer and

26

General Counsel. His last position was Corporate Group Vice President. Mr. Farrell holds a B.A. from the University of Notre Dame and a J.D. from Hastings College of Law, University of California.

        Frank H. Valone, M.D. has served as our Executive Vice President of Clinical Development and Regulatory Affairs since March 2002. From 1994 to 2002, Dr. Valone was the Chief Medical Officer at Dendreon Corporation, Seattle, WA. From 1991 to 1996, Dr. Valone held various positions at the Dartmouth-Hitchcock Medical Center and Norris Cotton Cancer Center including Professor of Medicine. From 1982 to 1991, Dr. Valone held faculty positions at the University of California, San Francisco, including Associate Professor of Medicine. Dr. Valone received a B.A. from Hamilton College and an M.D. from Harvard Medical School. His post-doctoral training was at the Brigham and Womens Hospital in Internal Medicine, Allergy and Rheumatology and at the Dana-Farber Cancer Center in Medical Oncology.

        Victor J. Bauer, Ph.D., has served on our Board of Directors since November 1997. He joined Titan in February 1997 and currently serves as our Executive Director of Corporate Development. From April 1996 until its merger into Titan, Dr. Bauer also served as a director and Chairman of Theracell. From December 1992 until February 1997, Dr. Bauer was a self-employed consultant to companies in the pharmaceutical and biotechnology industries. Prior to that time, Dr. Bauer was with Hoechst-Roussel Pharmaceuticals Inc., where he served as President from 1988 through 1992.

        Ernst-Günter Afting, M.D., Ph.D., has served on our Board of Directors since May 1996. He has served as the President of the GSF-National Center for Environment and Health, a government research center in Germany, since 1995. From 1984 until 1995, Dr. Afting was employed in various capacities by the Hoechst Group, serving as Divisional Head of the Pharmaceuticals Division of the Hoechst Group from 1991 to 1993 and as President and Chief Executive Officer of Roussel Uclaf (a majority stockholder of Hoechst AG) in Paris from 1993 until 1995. He currently serves on the Board of Directors of Sequenom, Inc.

        Eurelio M. Cavalier has served on our Board of Directors since September 1998. He was employed in various capacities by Eli Lilly & Co. from 1958 until his retirement in 1994, serving as Vice President Sales from 1976 to 1982 and Group Vice President U.S. Pharmaceutical Business Unit from 1982 to 1993. Mr. Cavalier currently serves on the Board of Directors of ProSolv, Inc.

        Michael K. Hsu has served on our Board of Directors since March 1993. He is currently a General Partner of EndPoint Merchant Group, a merchant bank specializing in making investments into the healthcare and life science industries. Mr. Hsu has served as Director-Corporate Finance of National Securities Corp. from November 1995 through April 1998, and from November 1994 through October 1995 served with Coleman & Company Securities in the same capacity. Mr. Hsu previously held various executive positions with Steinberg and Lyman Health Care Company, Ventana Venture Growth Fund and Asian Pacific Venture Group (Thailand).

        Hubert Huckel, M.D. has served on our Board of Directors since October 1995. He served in various positions with The Hoechst Group from 1964 until his retirement in December 1992. At the time of his retirement, Dr. Huckel was Chairman of the Board of Hoechst-Roussel Pharmaceuticals, Inc., Chairman and President of Hoechst-Roussel Agri-Vet Company and a member of the Executive Committee of Hoechst Celanese Corporation. He currently serves on the Board of Directors of Thermogenesis, Corp. and Amarin Pharmaceuticals, plc and is a member of their compensation committees.

        M. David MacFarlane, Ph.D., has served on the Board of Directors since May 2002. From 1989 until his retirement in August 1999, Dr. MacFarlane served as Vice President and Responsible Head of Regulatory Affairs of Genentech, Inc. Prior to joining Genentech, Inc., he served in various positions with Glaxo Inc., last as Vice President of Regulatory Affairs.

27

        Ley S. Smith has served on our Board of Directors since July 2000. He served in various positions with The Upjohn Company and Pharmacia & Upjohn from 1958 until his retirement in November 1997. From 1991 to 1993 he served as Vice Chairman of the Board of The Upjohn Company, and from 1993 to 1995 he was President and Chief Operating Officer of The Upjohn Company. At the time of his retirement, Mr. Smith was Executive Vice President of Pharmacia & Upjohn, and President of Pharmacia & Upjohn's U.S. Pharma Product Center. He currently serves on the Board of Directors of M.D.S. Proteomics Inc.

        Konrad M. Weis, Ph.D., has served on our Board of Directors since March 1993. He is the former President, Chief Executive Officer and Honorary Chairman of Bayer Corporation. Dr. Weis serves as a director of PNC Equity Management Company, Michael Baker Corporation, Visible Genetics, Inc. and Demegen, Inc.

        Directors serve until the next annual meeting or until their successors are elected and qualified. Officers serve at the discretion of the Board of Directors, subject to rights, if any, under contracts of employment. See "Item 11. Executive Compensation-Employment Agreements."

Director Compensation

        Directors are entitled to receive a fee for each meeting attended and stock options pursuant to our stockholder-approved stock option plans. During 2002, each director serving on the Board received a biennial option grant to purchase 15,000 shares of our common stock at an exercise price of $1.71. In addition, each director serving on a committee of the Board received an annual option grant to purchase 5,000 shares of our common stock at an exercise price of $1.71 per committee membership. Upon being elected director in May 2002, Dr. M. David MacFarlane received an option grant to purchase 10,000 shares of our common stock at an exercise price of $5.77. In addition to having their out-of-pocket expenses reimbursed, non-employee directors received $2,500 for each Board of Directors meeting attended in 2002. Directors are not precluded from serving us in any other capacity and receiving compensation therefore.

        We are a party to a consulting agreement with Dr. Ernst-Günter Afting pursuant to which he receives fees of $7,000 annually.

Board Committees and Designated Directors

        The Board of Directors has an Executive Committee, a Compensation Committee and an Audit Committee.

        The Executive Committee exercises all the power and authority of the Board of Directors in the management of the Company between Board meetings, to the extent permitted by law. The Compensation Committee makes recommendations to the Board concerning salaries and incentive compensation for our officers and employees and administers our stock option plans. The Audit Committee oversees the Company's financial reporting process on behalf of the Board of Directors.

        The Board of Directors met six times during the last fiscal year and also took action by unanimous written consent. The Executive Committee met twice and also took action by unanimous written consent. The Compensation Committee met one time and also took action by unanimous written consent. The Audit Committee met five times and also took action by unanimous written consent. Each of our current directors attended at least 75% of the aggregate of (i) the meetings of the Board of Directors and (ii) meetings of any Committees of the Board on which such person served which were held during the time such person served.

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Section 16(a) Beneficial Ownership Reporting Compliance

        Section 16(a) of the Securities Exchange Act of 1934, as amended, requires our executive officers, directors and persons who beneficially own more than 10% of a registered class of our equity securities to file with the Securities and Exchange Commission initial reports of ownership and reports of changes in ownership of our common stock and other equity securities. Such executive officers, directors, and greater than 10% beneficial owners are required by SEC regulation to furnish us with copies of all Section 16(a) forms filed by such reporting persons.

        Based solely on our review of such forms furnished to us and written representations from certain reporting persons, we believe that all filing requirements applicable to our executive officers, directors and greater than 10% beneficial owners were complied with.

Item 11. Executive Compensation.

        The following summary compensation table sets forth the aggregate compensation awarded to, earned by, or paid to the Chief Executive Officer and to executive officers whose annual compensation exceeded $100,000 for the fiscal year ended December 31, 2002 (collectively, the "named executive officers") for services during the fiscal years ended December 31, 2002, 2001, and 2000:

Summary Compensation Table

(1)

Dr. Valone joined Titan in March 2002.

(2)

Dr. Wallace left the company and ceased to be an officer in August 2001.

(3)

The amount disclosed for Mr. Farrell represents accrued vacation payment made in 2002.

29

Option Grants in Last Fiscal Year

        The following table contains information concerning the stock option grants made to the named executive officers during the fiscal year ended December 31, 2002. No stock appreciation rights were granted to these individuals during such year.

(1)

The exercise price may be paid in cash, in shares of common stock valued at the fair market value on the exercise date or through a cashless exercise procedure involving a same-day sale of the purchase shares.

Aggregate Option Exercises in Last Fiscal Year and Fiscal Year-End Option Values

        The following table sets forth information concerning option exercises and option holdings for the fiscal year ended December 31, 2002 with respect to the named executive officers. No stock appreciation rights were exercised during such year or were outstanding at the end of that year.

(1)

Based on the fair market value of our common stock at year-end, $1.43 per share, less the exercise price payable for such shares.

Compensation Committee Interlocks and Insider Participation

        Members of our Compensation Committee of the Board of Directors were Dr. Ernst-Günter Afting, Dr. Hubert E. Huckel and Dr. Konrad M. Weis. Mr. Eurelio M. Cavalier replaced Dr. Afting effective September 5, 2002. No member of our Compensation Committee was, or has been, an officer or employee of Titan or any of our subsidiaries.

        No member of the Compensation Committee has a relationship that would constitute an interlocking relationship with Executive Officers or Directors of the Company or another entity.

30

Employment Agreements

        We are a party to an employment agreement with Dr. Bucalo expiring in February 2004 that provides for a base annual salary of $210,000, subject to annual increases of 5% and bonuses of up to 25% at the discretion of the Board of Directors. In the event of the termination of the agreement with Dr. Bucalo, other than for reasons specified therein, we are obligated to make severance payments equal to his base annual salary for the greater of the balance of the term of the agreement or 18 months.

        Employment agreements with each of Dr. Allen, Mr. Bhonsle and Mr. Farrell provide for a base annual salary of $185,000 subject to automatic annual increases based on increases in the consumer price index, and bonuses of up to 20% at the discretion of the Board of Directors. An employment agreement with Dr. Valone provides for a base annual salary of $275,000 subject to automatic annual increases based on increases in the consumer price index, and bonuses of up to 20% at the discretion of the Board of Directors. In the event the employee's employment is terminated other than for "good cause" (as defined in each employment agreement), we are obligated to make severance payments equal to the base annual salary for six months. All of the agreements contain confidentiality provisions.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

        The following table sets forth, as of March 24, 2003, certain information concerning the beneficial ownership of our common stock by (i) each stockholder known by us to own beneficially five percent or more of our outstanding common stock; (ii) each director; (iii) each executive officer; and (iv) all of our executive officers and directors as a group, and their percentage ownership and voting power.

*

Less than one percent.

31

(1)

Unless otherwise indicated, the address of such individual is c/o Titan Pharmaceuticals, Inc.,
400 Oyster Point Boulevard, Suite 505, South San Francisco, California 94080.

(2)

In computing the number of shares beneficially owned by a person and the percentage ownership of a person, shares of our common stock subject to options held by that person that are currently exercisable or exercisable within 60 days are deemed outstanding. Such shares, however, are not deemed outstanding for purposes of computing the percentage ownership of each other person. Except as indicated in the footnotes to this table and pursuant to applicable community property laws, the persons named in the table have sole voting and investment power with respect to all shares of common stock.

(3)

Includes 1,472,651 shares issuable upon exercise of outstanding options.

(4)

Includes 44,249 shares issuable upon exercise of outstanding options.

(5)

Includes 498,014 shares issuable upon exercise of outstanding options.

(6)

Includes 178,246 shares issuable upon exercise of outstanding options.

(7)

Includes 598,944 shares issuable upon exercise of outstanding options.

(8)

Includes 59,062 shares issuable upon exercise of outstanding options.

(9)

Includes 240,591 shares issuable upon exercise of outstanding options.

(10)

Includes 40,312 shares issuable upon exercise of outstanding options.

(11)

Includes (i) 72,687 shares issuable upon exercise of outstanding options, (ii) 49,900 shares held by a family partnership for which Dr. Huckel serves as general partner, and (iii) 3,000 shares held by his wife.

(12)

Includes 12,812 shares issuable upon exercise of outstanding options.

(13)

Includes 53,437 shares issuable upon exercise of outstanding options.

(14)

Includes 50,224 shares issuable upon exercise of outstanding options.

(15)

Includes 88,366 shares issuable upon exercise of outstanding options.

(16)

Derived from a Schedule 13G/A filed by Kevin Douglas and The Douglas Family Trust as of December 31, 2002.

(17)

Derived from a Schedule 13G filed by Morgan Stanley Capital Services, Inc. on February 18, 2003.

(18)

Derived from a Schedule 13G filed by Lotsoff Capital Management on February 12, 2003.

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Equity Compensation Plan Information

        The following table sets forth aggregate information regarding our equity compensation plans in effect as of December 31, 2002:

(1)

In August 2002, we amended our 2001 Employee Non-Qualified Stock Option Plan. Pursuant to this amendment, a total of 1,750,000 shares of common stock were reserved and authorized for issuance for option grants to employees and consultants who are not officers or directors of Titan.

(2)

In November 1999 and in connection with the warrant call, we granted 813,000 non-qualified stock options outside of our stock option plans to our executive officers, at an exercise price of $12.69, vesting equally over 36 months from the date of grant.

Item 13. Certain Relationships and Related Transactions.

        In February 2001, we loaned Robert E. Farrell, our Executive Vice President and Chief Financial Officer, approximately $373,000 to finance certain federal and state income tax liabilities incurred by Mr. Farrell in connection with his exercise of stock options. The loan was due and payable on August 7, 2002 and as of December 31, 2002, the principal balance was paid in full.

        In December 2001, we entered into agreements with certain of our officers and directors pursuant to which those officers and directors rescinded stock options that were previously granted and exercised. Robert E. Farrell, our Executive Vice President and Chief Financial Officer, rescinded 63,294 options that he exercised on a "cashless" basis. As a result, Mr. Farrell returned 27,515 shares of our common stock to us. Eurelio M. Cavalier, a director, rescinded 20,000 previously exercised options. He returned 20,000 shares of our common stock to us and received $61,580 in return of his exercise price. Dr. Hubert Huckel, a director, rescinded 5,000 previously exercised options. Dr. Huckel returned 5,000 shares of our common stock to us and received $45,315 in return of his exercise price. All of the above options which were reinstated as a result of the rescissions were immediately cancelled.

Item 14. Controls and Procedures

        Based on the evaluation by Titan under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of Titan's disclosure controls and procedures pursuant to Rule 13a-14 of the Securities and Exchange Act of 1934, as amended (the Exchange Act), as of a date within 90 days of the filing date of this quarterly report, our Chief Executive Officer and Chief Financial Officer have concluded that the disclosure controls and procedures are effective in ensuring that information required to be disclosed by Titan in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time period specified by the Securities and Exchange Commission's rules and forms.

        Subsequent to the date of their evaluation, there were no significant changes in Titan's internal controls or in other factors that could significantly affect these controls nor were any corrective actions required with regard to significant deficiencies and material weaknesses.

33

PART IV

Item 15. Exhibits, Financial Statements Schedules and Reports on Form 8-K

(a)

1. Financial Statements

An index to Consolidated Financial Statements appears on page F-1.

2. Schedules

        All financial statement schedules are omitted because they are not applicable, not required under the instructions or all the information required is set forth in the financial statements or notes thereto.

3. Exhibits

34

†

Confidential treatment has been granted with respect to portions of this exhibit.

(1)

Incorporated by reference from the Registrant's Registration Statement on Form SB-2 (File No. 33-99386).

(2)

Incorporated by reference from the Registrant's Definitive Proxy Statement filed on September 3, 1996.

(3)

Incorporated by reference from the Registrant's Registration Statement on Form SB-2 (File No. 333-13469) filed on October 4, 1996, amended on November 25, 1996.

(4)

Incorporated by reference from the Registrant's Annual Report on Form 10-KSB for the year ended December 31, 1996.

(5)

Incorporated by reference from the Registrant's Registration Statement on Form S-3 (File No. 333-42367) filed on December 16, 1997.

(6)

Incorporated by reference from the Registrant's Annual Report on Form 10-K for the year ended December 31, 1997.

(7)

Incorporated by reference from the Registrant's Definitive Proxy Statement filed on July 28, 2000.

(8)

Incorporated by reference from the Registrant's Annual Report on Form 10-K for the year ended December 31, 1999.

(9)

Incorporated by reference from the Registrant's Quarterly Report on Form 10-Q for the period ended September 30, 2000.

(10)

Incorporated by reference from the Registrant's Annual Report on Form 10-K for the year ended December 31, 2001.

(b)  Reports on Form 8-K

        We filed a current report on Form 8-K with the Securities and Exchange Commission on December 11, 2002 to announce the results of a Phase III, randomized, placebo-controlled study of our monoclonal antibody CeaVac in patients with metastatic colorectal cancer.

35

TITAN PHARMACEUTICALS, INC.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

F-1

REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

The Board of Directors and Stockholders
Titan Pharmaceuticals, Inc.

        We have audited the accompanying consolidated balance sheets of Titan Pharmaceuticals, Inc. as of December 31, 2002 and 2001, and the related consolidated statements of operations, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2002. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits.

        We conducted our audits in accordance with auditing standards generally accepted in the United States. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

        In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of Titan Pharmaceuticals, Inc. at December 31, 2002 and 2001, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2002, in conformity with accounting principles generally accepted in the United States.

/s/ Ernst & Young LLP

Palo Alto, California
February 24, 2003

F-2

TITAN PHARMACEUTICALS, INC.

CONSOLIDATED BALANCE SHEETS

See accompanying notes.

F-3

TITAN PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

See accompanying notes.

F-4

TITAN PHARMACEUTICALS, INC

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY

(in thousands)