Exhibit 99.1 Chiron Reports 2003 Total Revenues of $1.8 Billion 47 Percent Increase in Net Product Sales Over 2002 19 Percent Increase in Pro-Forma Earnings Per Share Over 2002 EMERYVILLE, Calif., Jan. 28 /PRNewswire-FirstCall/ -- Chiron Corporation (Nasdaq: CHIR) today reported pro-forma income from continuing operations of $297 million, or $1.54 per share, for the year ended December 31, 2003, compared to $248 million, or $1.29 per share, for the year ended December 31, 2002. For the year, foreign exchange rates, on a pro-forma basis, resulted in a $0.06 increase in earnings per share. On a GAAP basis, Chiron reported income from continuing operations of $220 million, or $1.15 per share, for the year 2003, compared to income from continuing operations of $181 million, or $0.94 per share, for the year 2002. For the fourth quarter of 2003, Chiron reported pro-forma income from continuing operations of $56 million, or $0.29 per share, compared to $63 million, or $0.33 per share, for the fourth quarter of 2002. For the quarter, foreign exchange rates, on a pro-forma basis, resulted in a $0.02 increase in earnings per share over the fourth quarter of 2002. On a GAAP basis, Chiron reported income from continuing operations of $118 million, or $0.59 per share, for the fourth quarter of 2003, compared to income from continuing operations of $67 million, or $0.35 per share, for the fourth quarter of 2002. On a GAAP basis, Chiron recorded a purchase-price allocation adjustment to the write-off of purchased, in-process research and development related to the PowderJect Pharmaceuticals acquisition, for the fourth quarter of 2003, upon completion of strategic assessments of the value of certain research and development projects. Chiron management uses pro-forma financial statements to gain an understanding of the company's operating performance on a comparative basis. Pro-forma results exclude special items relating to certain acquisitions and revenues, which may not be relevant to gaining an understanding of the company's trends or potential future performance. Please refer to the attached tables at the end of this document for more detail on these items and a reconciliation to GAAP financial statements. All references to per-share amounts are per diluted share. "Chiron's strong performance shows our ability to deliver excellent financial results while making key investments in our businesses to create future value for shareholders," said Howard Pien, Chiron's president and chief executive officer. "Building on our 2003 successes, we have set aggressive goals for ourselves in 2004. "We are aiming to reach 20 significant goals and milestones, including the geographic expansion of Blood Testing into the Pacific Rim, continued investment in flu vaccine production and development, and initiation of Phase II and III clinical trials in our infectious disease and cancer franchises, as well as delivering 20 percent long-term EPS growth. These advances and investments attest to our commitment to pioneering science and to improve human health worldwide." Overall Revenues Total revenues were $1.8 billion for the year 2003, compared to $1.3 billion for the year 2002. Foreign exchange rates resulted in an 8 percent increase in total revenues. Net product sales were $1.3 billion for the year 2003, compared to $914 million for the year 2002. Total 2003 revenues for PowderJect Pharmaceuticals, which Chiron acquired during the third quarter of 2003, were $245 million. Excluding PowderJect revenues and foreign exchange effect, all other revenues increased 11 percent in 2003. Blood Testing Total Blood Testing revenues were $422 million for the year 2003, compared to $316 million for the year 2002. Blood Testing revenues primarily include revenues from the sales of products related to Chiron's Procleix(R) HIV-1/HCV Assay; revenues related to Chiron's joint business arrangement for immunodiagnostics with Ortho-Clinical Diagnostics, Inc. (Ortho), a Johnson & Johnson company; and royalties paid by F. Hoffmann-La Roche (Roche) related to nucleic acid testing (NAT) blood screening. -- Sales related to the Procleix(R) System were $200 million for the year 2003, compared to sales of $125 million for the year 2002. The increase is primarily due to a full year of commercial pricing in the United States, revenues from the investigation-only use of the Procleix(R) West Nile Virus Assay in the United States, market share gains in the United States, and continued penetration into several markets abroad. Procleix sales were $58 million for the fourth quarter of 2003, compared to $42 million for the fourth quarter of 2002. -- Revenues from Chiron's joint business arrangement with Ortho were $108 million for the year 2003, compared to $105 million for the year 2002. Revenues from the joint business arrangement were $28 million for the fourth quarter of 2003, compared to $26 million for the fourth quarter of 2002. -- Royalties paid by Roche related to NAT blood screening were $62 million for the year 2003, compared to $49 million for the year 2002. Royalties paid by Roche related to NAT blood screening were $14 million for the fourth quarter of 2003, compared to $15 million for the fourth quarter of 2002. Vaccines Vaccines net product sales were $678 million for the year 2003, compared to $357 million for the year 2002. PowderJect product sales were $243 million for the year 2003. The gross profit margin on vaccines products was 53 percent for the year 2003, compared to 58 percent for the year 2002, with the decrease primarily due to the one-time effect of additional costs associated with the fair value of inventory acquired during the acquisition of PowderJect. Total vaccines product sales were $262 million for the fourth quarter of 2003, compared to $101 million for the fourth quarter of 2002. -- Sales of flu vaccines were $332 million for the year 2003, compared to $90 million for the year 2002. Sales of Fluvirin(R) vaccine, the flu vaccine that Chiron acquired with PowderJect, were $219 million for the year 2003, representing one full season of Fluvirin revenues. Sales of Agrippal(R) S1, Begrivac(TM) and Fluad(R) flu vaccines were $113 million for the year 2003. Flu vaccines sales were $141 million for the fourth quarter of 2003, compared to $19 million for the fourth quarter of 2002. -- Sales of Menjugate(R) conjugate vaccine against meningococcal C disease were $66 million for the year 2003, compared to $55 million for the year 2002, with the increase primarily due to sales made to Australia. Menjugate sales were $34 million for the fourth quarter of 2003, compared to $33 million for the fourth quarter of 2002. -- Sales of Chiron's travel vaccines were $88 million for the year 2003, compared to $64 million for the year 2002. Travel vaccines primarily include Encepur(TM) vaccine for tick-borne encephalitis and RabAvert(R) vaccine for rabies. The increase was primarily due to increased sales of Encepur vaccine in Germany. Travel vaccines sales were $28 million for the fourth quarter of 2003, compared to $6 million for the fourth quarter of 2002. -- Sales of Chiron's pediatric and other vaccines products were $192 million for the year 2003, compared to $148 million for the year 2002, with the increase primarily due to tender sales of pediatric vaccines and increased sales following the PowderJect acquisition. Pediatric and other vaccines products sales were $59 million for the fourth quarter of 2003, compared to $43 million for the fourth quarter of 2002. BioPharmaceuticals The BioPharmaceuticals division reported net product sales and Betaferon(R) interferon beta-1b royalties of $503 million for the year 2003, compared to $456 million for the year 2002. The gross profit margin on biopharmaceutical products was 72 percent for the year 2003, compared to 73 percent for the year 2002. Total biopharmaceutical product sales and Betaferon royalties were $137 million for the fourth quarter of 2003, compared to $122 million for the fourth quarter of 2002. -- TOBI(R) tobramycin solution for inhalation sales were $172 million for the year 2003, compared to $147 million for the year 2002, with the increase primarily due to progress of the product in Europe, the benefit of foreign exchange rates and price increases. TOBI sales were $49 million for the fourth quarter of 2003, compared to $39 million for the fourth quarter of 2002. -- Proleukin(R) (aldesleukin) interleukin-2 sales were $115 million for the year 2003, compared to $114 million for the year 2002. The consistent sales pattern was primarily due to price increases, the benefit of foreign exchange rates and increased patient demand in the United States, offset by wholesaler ordering patterns. Proleukin sales were $30 million for the fourth quarter of 2003, compared to $31 million for the fourth quarter of 2002. -- Sales of Betaseron(R) interferon beta-1b for injection, marketed in Europe as Betaferon(R), to Berlex, Inc., (and its parent company Schering AG) for marketing and resale were $125 million for the year 2003, compared to $118 million for the year 2002. The increase was primarily due to increased patient demand, price increases and the benefit of foreign exchange rates. The increase was partially offset by a decline in royalties on product sales in the fourth quarter of 2003, pursuant to our agreement with Schering, and changes in wholesaler ordering patterns. Royalties from Schering AG's European sales of Betaferon were $64 million for the year 2003, compared to $47 million for the year 2002. The increase was primarily due to increased patient demand and the benefit of foreign exchange rates. The increase was partially offset by a decline in Betaferon royalties in the fourth quarter of 2003, pursuant to Chiron's agreement with Schering. Sales of Betaseron for marketing and resale were $36 million for the fourth quarter of 2003, compared to $34 million for the fourth quarter of 2002. Royalties from Schering AG's European sales of Betaferon were $17 million for the fourth quarter of 2003, compared to $13 million for the fourth quarter of 2002. Pipeline and Products Update Chiron has seen recent advances in franchises across all three of its business units and expects continued progress in 2004. Blood Testing Chiron expects to expand its leadership in blood testing through new assays, new geographies, greater market penetration and expansion into blood safety. -- At the American Association of Blood Banks annual meeting in San Diego in November, Chiron announced that the Procleix(R) West Nile Virus Assay had identified 861 blood donations confirmed to be infected with the West Nile virus since the investigational-use-only assay was implemented at the beginning of the 2003 mosquito season. Chiron expects to begin a registration trial for the assay in the United States this year. -- The Procleix(R) Ultrio(TM) Assay, for the simultaneous detection of HIV-1, hepatitis C virus (HCV) and hepatitis B virus (HBV) in donated blood, plasma, organs and tissue, received CE marking in Europe, which will allow full commercialization of the product there. -- In the United States, the Procleix Ultrio Assay entered clinical trials, and Chiron, in collaboration with its partner Gen-Probe Incorporated, expects to file a biologics license application (BLA) for the assay this year. In the first quarter of this year, Chiron and Gen-Probe expect to begin clinical trials for 510(k) approval of the TIGRIS(R) fully automated system, a key enabling technology for individual donor testing. The TIGRIS clinical trials will run the Procleix Ultrio Assay in support of its BLA. -- In collaboration with ZymeQuest Inc., Chiron plans to develop and commercialize ZymeQuest's enzymatic conversion system, which converts groups A, B and AB red blood cells to enzyme-converted group O (ECO(R)) red blood cells. This technology could greatly reduce the number of blood donations currently discarded due to blood types not matching patient needs. -- Chiron recently announced an agreement with Infectio Diagnostic Inc. (IDI) to license IDI's proprietary nucleic acid-based technology for the rapid detection of bacterial contamination in platelets and blood products. The technology brings the potential for reducing test time from two days to one, an important factor given the five-day shelf life of platelet concentrates. Vaccines Chiron Vaccines development is focused on its meningococcal franchise and flu cell-culture technology. -- For the 2003-2004 flu season, Chiron increased production of Fluvirin(R) influenza vaccine for the U.S. market by approximately 50 percent over the 2002-2003 flu season. The company produced more than 40 million Fluvirin doses worldwide, including approximately 38 million doses for the U.S. market. For the 2004-2005 flu season, Chiron expects to increase capacity, producing approximately 50 million doses of Fluvirin, most of which is destined for the United States. The company has committed approximately $100 million for the expansion of its manufacturing facility in Liverpool, England. -- Chiron expects to enter Phase III studies for its flu cell-culture vaccine this year. A flu cell-culture vaccine may offer additional manufacturing flexibility. -- In the development of vaccines for the five primary serogroups that cause meningococcal disease, Chiron anticipates upcoming advances: -- The Phase III trial in the United States for Menjugate(R) conjugate vaccine for meningococcal C disease completed enrollment, and Chiron expects to present data to the U.S. Food and Drug Administration (FDA) this year. -- Chiron expects to see further progress toward the Phase III program for its conjugated meningococcal ACWY vaccine this year. -- In collaboration with the HIV Vaccine Trials Network, funded by the National Institute of Allergy and Infectious Diseases, Chiron initiated a clinical trial in the United States for its HIV vaccine candidate, testing a new generation of HIV vaccines that attempt to generate cellular immune response together with broad antibody response that will neutralize the virus. The Phase I study will evaluate the safety and immunogenicity of the vaccine. BioPharmaceuticals: Infectious Disease Chiron continues to build its portfolio of products to treat and prevent infectious disease. This franchise leverages a significant global commercial infrastructure. -- Chiron is progressing in its evaluation of aerosolized cyclosporine as a potential treatment for lung transplant rejection and plans to file a new drug application (NDA) this year. -- Chiron is determining the regulatory path forward for daptomycin in the European Union. Chiron in-licensed the antibiotic, which the FDA has approved for the treatment of complicated skin and skin structure infections caused by Gram-positive bacteria, from Cubist Pharmaceuticals Inc. in 2003, gaining development and commercialization rights in Europe and several countries outside the United States. -- Chiron initiated the ELITE (EarLy Intervention TOBI Eradication) trial in Europe to further study the benefits of TOBI(R) tobramycin solution for inhalation in treatment of early onset Pseudomonas aeruginosa in cystic fibrosis patients. -- Chiron is investing to expand its TOBI franchise in its study of the dry-powder formulation, delivered with a hand-held device that the company is developing in collaboration with Nektar Therapeutics. Chiron anticipates Phase I results from this study in the first half of the year, and, based on an understanding with the FDA, the company may move directly to Phase III testing by the end of the year. -- Chiron plans to initiate a Phase III trial for tifacogin in patients with severe community-acquired pneumonia this spring. BioPharmaceuticals: Oncology Chiron's oncology franchise has three dimensions: immune-based therapies, monoclonal antibodies and novel cancer agents. -- Based on objective, durable responses in a specific sub-population, Chiron is expanding enrollment in its Phase II study of Proleukin(R) (aldesleukin) for injection plus rituximab in patients with low-grade non-Hodgkin's lymphoma who have failed rituximab therapy. The company has submitted an abstract to the American Society of Clinical Oncology (ASCO) meeting, to be held June 5-8 in New Orleans, to detail these findings. -- Chiron is broadening the scope of its development of Proleukin plus rituximab by initiating a new Phase II study in rituximab-naive patients to determine the combination's potential as an early treatment option. -- Chiron recently began a Phase I study for GFKI-258. This growth factor kinase inhibitor is Chiron's first small-molecule oncology compound. -- Chiron expects to file an investigational new drug application (IND) for another oncology compound, anti-CD40, this year. BioPharmaceuticals: Betaseron(R) Interferon Beta-1b for Injection Betaseron continues to distinguish itself in the multiple sclerosis (MS) market through its strong clinical results. Convenience features and new studies will help drive Betaseron growth. -- Chiron and its partner Berlex launched a new pre-filled diluent syringe for Betaseron, making it easier to use for people with MS. The drug's formulation remains unchanged, continuing to provide patients with the proven efficacy of Betaseron. Other Recent Business Milestones Other recent business activities underline the value of Chiron's products and intellectual property and the strength of its leadership. -- Chiron announced the appointment of David Smith to the position of chief financial officer. Mr. Smith joined Chiron Corporation as vice president, corporate controller, in February 1999 and previously held executive finance positions at Anergen Inc. and Genentech. -- Chiron granted nonexclusive licenses to Pfizer Inc., Rigel Pharmaceutials, Vertex Pharmaceutials and Boehringer Ingelheim International GmbH for the research, development and commercialization of therapeutics against certain hepatitis C virus (HCV) drug targets. 4Q03 Earnings Conference Call Chiron will hold a conference call and webcast on Wednesday, January 28, 2004, at 4:45 p.m. EST to review its fourth-quarter 2003 results of operations and business highlights. In addition, the company may address forward-looking questions concerning business, financial matters and trends affecting the company. To access either the live call or the one-week archive, please log on to http://www.chiron.com/webcast . Please connect to the website at least 15 minutes prior to the conference call to ensure adequate time to download any necessary software. Alternatively, please call 1-800-374-0907 (U.S.) or 706-643-3367 (international). Replay is available approximately two hours after the completion of the call through 11:00 p.m. EST, Wednesday, February 4, 2004. To access the replay, please call 1-800-642-1687 (U.S.) or 706-645-9291 (international). The conference ID number is 1046313. About Chiron Chiron Corporation, headquartered in Emeryville, California, is a global pharmaceutical company that leverages a diverse business model to develop and commercialize high-value products that make a difference in people's lives. The company has a strategic focus on cancer and infectious disease. Chiron applies its advanced understanding of the biology of cancer and infectious disease to develop products from its platforms in proteins, small molecules and vaccines. The company commercializes its products through three business units: BioPharmaceuticals, Vaccines and Blood Testing. For more information about Chiron, visit the company's website at www.chiron.com. This news release contains forward-looking statements, including statements regarding sales growth, product development initiatives, new product indications, new product marketing, acquisitions, and in- and out- licensing activities, that involve risks and uncertainties and are subject to change. A full discussion of the company's operations and financial condition, including factors that may affect its business and future prospects, is contained in documents the company has filed with the SEC, including the form 10-Q for the quarter ended September 30, 2003, and the form 10-K for the year ended December 31, 2002, and will be contained in all subsequent periodic filings made with the SEC. These documents identify important factors that could cause the company's actual performance to differ from current expectations, including the outcome of clinical trials, regulatory review and approvals, manufacturing capabilities, intellectual property protections and defenses, stock-price and interest-rate volatility, and marketing effectiveness. In particular, there can be no assurance that Chiron will increase sales of existing products, successfully develop and receive approval to market new products, or achieve market acceptance for such new products. There can be no assurance that Chiron's out-licensing activities will generate significant revenue, nor that its in-licensing activities will fully protect it from claims of infringement by third parties. In addition, the company may engage in business opportunities, the successful completion of which are subject to certain risks, including shareholder and regulatory approvals and the integration of operations. Consistent with SEC Regulation FD, we do not undertake an obligation to update the forward-looking information we are giving today. NOTE: Agrippal, Begrivac, Encepur, Fluad, Fluvirin, Menjugate, Procleix, Proleukin, RabAvert, TOBI and Ultrio are trademarks of Chiron Corporation. Betaseron and Betaferon are trademarks of Schering AG. TIGRIS is a registered trademark of Gen-Probe Incorporated. ZymeQuest and ECO are trademarks of ZymeQuest, Inc. CHIRON CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (In thousands, except per share data) Three Months Ended December 31, 2003 Pro Forma Pro Forma Adjusted (1) Adjustments Actual Revenues: Product sales, net $448,611 $-- $448,611 Revenues from joint business arrangement 28,313 -- 28,313 Collaborative agreement revenues 3,008 -- 3,008 Royalty and license fee revenues 63,605 -- 63,605 Other revenues 11,044 -- 11,044 Total revenues 554,581 -- 554,581 Operating expenses: Cost of sales 214,508 -- 214,508 Research and development 140,242 -- 140,242 Selling, general and administrative 121,405 -- 121,405 Write-off (reversal) of purchased in-process research and development -- 77,400 (77,400) Amortization expense -- (21,230) 21,230 Restructuring and reorganization (reversals) charges (103) -- (103) Other operating expenses 3,803 -- 3,803 Total operating expenses 479,855 56,170 423,685 Income from operations 74,726 (56,170) 130,896 Interest expense (6,581) -- (6,581) Interest and other income, net 7,498 -- 7,498 Minority interest (329) -- (329) Income from continuing operations before income taxes 75,314 (56,170) 131,484 Provision for income taxes 18,828 5,307 13,521 Income from continuing operations 56,486 (61,477) 117,963 Gain from discontinued operations 3,837 -- 3,837 Net income $60,323 $(61,477) $121,800 Basic earnings per share: Income from continuing operations $0.30 $0.63 Net Income $0.32 $0.65 Diluted earnings per share: Income from continuing operations $0.29 $0.59 Net Income $0.31 $0.61 Shares used in calculating basic earnings per share 187,393 187,393 Shares used in calculating diluted earnings per share 200,567 205,795 2002 Pro Forma Pro Forma Adjusted (2) Adjustments Actual Revenues: Product sales, net $257,054 $-- $257,054 Revenues from joint business arrangement 26,028 -- 26,028 Collaborative agreement revenues 4,356 -- 4,356 Royalty and license fee revenues 60,397 -- 60,397 Other revenues 8,489 -- 8,489 Total revenues 356,324 -- 356,324 Operating expenses: Cost of sales 101,985 -- 101,985 Research and development 81,854 -- 81,854 Selling, general and administrative 81,690 -- 81,690 Write-off (reversal) of purchased in-process research and development -- 9,600 (9,600) Amortization expense -- (7,529) 7,529 Restructuring and reorganization (reversals) charges -- -- -- Other operating expenses 5,776 -- 5,776 Total operating expenses 271,305 2,071 269,234 Income from operations 85,019 (2,071) 87,090 Interest expense (3,323) -- (3,323) Interest and other income, net 4,906 -- 4,906 Minority interest (304) -- (304) Income from continuing operations before income taxes 86,298 (2,071) 88,369 Provision for income taxes 23,300 2,033 21,267 Income from continuing operations 62,998 (4,104) 67,102 Gain from discontinued operations -- -- -- Net income $62,998 $(4,104) $67,102 Basic earnings per share: Income from continuing operations $0.34 $0.36 Net Income $0.34 $0.36 Diluted earnings per share: Income from continuing operations $0.33 $0.35 Net Income $0.33 $0.35 Shares used in calculating basic earnings per share 187,639 187,639 Shares used in calculating diluted earnings per share 190,899 196,127 (1) Pro Forma Adjusted amounts exclude (a) the amortization expense on acquired intangible assets related to the acquisitions of PathoGenesis, Chiron Behring, Pulmopharm and PowderJect Pharmaceuticals and (b) a purchase price allocation adjustment to the write-off of purchased in-process research and development related to the PowderJect Pharmaceuticals acquisition, upon completion of strategic assessments of the value of certain research and development projects. (2) Pro Forma Adjusted amounts exclude (a) the amortization expense on acquired intangible assets related to the acquisitions of PathoGenesis, Chiron Behring and Pulmopharm and (b) the adjustment to the write-off of purchased in-process research and development related to the Matrix acquisition for a lease assignment. CHIRON CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (In thousands, except per share data) Year Ended December 31, 2003 Pro Forma Pro Forma Adjusted (3) Adjustments Actual Revenues: Product sales, net $1,345,833 $-- $1,345,833 Revenues from joint business arrangement 108,298 -- 108,298 Collaborative agreement revenues 18,562 -- 18,562 Royalty and license fee revenues 250,142 -- 250,142 Other revenues 29,113 (14,413) 43,526 Total revenues 1,751,948 (14,413) 1,766,361 Operating expenses: Cost of sales 571,897 -- 571,897 Research and development 409,806 -- 409,806 Selling, general and administrative 378,890 -- 378,890 Write-off of purchased in-process research and development -- (45,300) 45,300 Amortization expense -- (56,365) 56,365 Restructuring and reorganization charges 1,654 -- 1,654 Other operating expenses 11,376 -- 11,376 Total operating expenses 1,373,623 (101,665) 1,475,288 Income from operations 378,325 87,252 291,073 Interest expense (19,104) -- (19,104) Interest and other income, net 38,668 -- 38,668 Minority interest (1,753) -- (1,753) Income from continuing operations before income taxes 396,136 87,252 308,884 Provision for income taxes 99,034 10,488 88,546 Income from continuing operations 297,102 76,764 220,338 Gain (loss) from discontinued operations 6,975 -- 6,975 Net income $304,077 $76,764 $227,313 Basic earnings per share: Income from continuing operations $1.59 $1.18 Net income $1.63 $1.22 Diluted earnings per share: Income from continuing operations $1.54 $1.15 Net income $1.58 $1.19 Shares used in calculating basic earnings per share 186,835 186,835 Shares used in calculating diluted earnings per share 199,143 193,915 2002 Pro Forma Pro Forma Adjusted (4) Adjustments Actual Revenues: Product sales, net $914,121 $-- $914,121 Revenues from joint business arrangement 104,576 -- 104,576 Collaborative agreement revenues 22,142 -- 22,142 Royalty and license fee revenues 198,816 -- 198,816 Other revenues 36,625 -- 36,625 Total revenues 1,276,280 -- 1,276,280 Operating expenses: Cost of sales 341,808 -- 341,808 Research and development 325,792 -- 325,792 Selling, general and administrative 283,712 -- 283,712 Write-off of purchased in-process research and development -- (45,181) 45,181 Amortization expense -- (29,857) 29,857 Restructuring and reorganization charges -- -- -- Other operating expenses 16,952 -- 16,952 Total operating expenses 968,264 (75,038) 1,043,302 Income from operations 308,016 75,038 232,978 Interest expense (12,821) -- (12,821) Interest and other income, net 46,362 -- 46,362 Minority interest (1,664) -- (1,664) Income from continuing operations before income taxes 339,893 75,038 264,855 Provision for income taxes 91,771 8,061 83,710 Income from continuing operations 248,122 66,977 181,145 Gain (loss) from discontinued operations (320) -- (320) Net income $247,802 $66,977 $180,825 Basic earnings per share: Income from continuing operations $1.31 $0.96 Net income $1.31 $0.96 Diluted earnings per share: Income from continuing operations $1.29 $0.94 Net income $1.29 $0.94 Shares used in calculating basic earnings per share 188,792 188,792 Shares used in calculating diluted earnings per share 192,152 192,152 (3) Pro Forma Adjusted amounts exclude: (a) the Biogen and Serono settlements in connection with the McCormick patents owned by Schering's U.S. subsidiary, Berlex Labratories, (b) amortization expense on acquired intangible assets related to the acquisitions of PathoGenesis, Chiron Behring, Pulmopharm and PowderJect Pharmaceuticals and (c) the write-off of purchased in-process research and development related to the PowderJect Pharmaceuticals acquisition. (4) Pro Forma Adjusted amounts exclude: (a) write-off of purchased in- process research and development related to the Matrix acquisition and (b) amortization expense on acquired identifiable intangible assets related to the acquisitions of PathoGenesis, Chiron Behring and Pulmopharm. Note: Due to rounding, quarterly earnings per share amounts may not sum fully to yearly earnings per share amounts. CHIRON CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (In thousands) December 31, December 31, 2003 2002 Assets Current assets: Cash and short-term investments $538,482 $874,080 Accounts receivable, net 382,933 278,625 Current portion of notes receivable 1,479 718 Inventories, net 199,625 146,005 Other current assets 135,130 86,294 Total current assets 1,257,649 1,385,722 Noncurrent investments in marketable debt securities 560,292 414,447 Property, plant, equipment and leasehold improvements, net 689,750 373,558 Other noncurrent assets 1,687,478 786,617 Total assets $4,195,169 $2,960,344 Liabilities and stockholders' equity Current liabilities $436,913 $298,636 Long-term debt 926,709 416,954 Capital lease 157,677 -- Noncurrent unearned revenue 45,564 62,580 Other noncurrent liabilities 176,944 81,809 Minority interest 7,002 5,355 Put options -- 19,054 Stockholders' equity 2,444,360 2,075,956 Total liabilities and stockholders' equity $4,195,169 $2,960,344 CHIRON CORPORATION Supplemental Revenue Summary (Pro Forma) USD $ (in thousands) Current Prior Change Quarter Quarter from Change Q4 2003 Q3 2003 Prior QTR % Product Sales, net Blood Testing Ortho $8,625 $6,235 $2,390 38.3% NAT 58,299 53,663 4,636 8.6% Total Blood Testing 66,924 59,898 7,026 11.7% Vaccines Flu Vaccines 141,142 183,250 (42,108) (23.0)% Meningococcus Vaccines 33,672 10,642 23,030 216.4% Travel Vaccines 27,850 11,229 16,621 148.0% Pediatric/Other Vaccines 58,974 57,598 1,376 2.4% Total Vaccines 261,638 262,719 (1,081) (0.4)% Biopharmaceuticals: Proleukin 29,852 29,859 (7) 0.0% TOBI 49,307 43,022 6,285 14.6% Betaseron* 36,148 29,010 7,138 24.6% Other 4,742 8,166 (3,424) (41.9)% Total Biopharmaceuticals 120,049 110,057 9,992 9.1% TOTAL PRODUCT SALES, NET $448,611 $432,674 $15,937 3.7% Revenues From Joint Business Arrangement $28,313 $26,058 $2,255 8.7% Collaborative Agreement Revenues 3,008 7,816 (4,808) (61.5)% Royalty and License Fee Revenues 63,605 66,237 (2,632) (4.0)% Other Revenues 11,044 7,688 3,356 43.7% TOTAL REVENUES $554,581 $540,473 $14,108 2.6% Gross Margins Blood Testing 38% 40% (2)% Vaccines 49% 58% (9)% Biopharmaceuticals 66% 74% (8)% TOTAL GROSS MARGINS 52% 60% (8)% * Excludes Betaferon Royalty $16,658 $15,970 $688 4.3% Year Ago Change Quarter from Change Q4 2002 Prior Year % Product Sales, net Blood Testing Ortho $5,513 $3,112 56.4% NAT 42,041 16,258 38.7% Total Blood Testing 47,554 19,370 40.7% Vaccines Flu Vaccines 18,948 122,194 644.9% Meningococcus Vaccines 33,152 520 1.6% Travel Vaccines 5,823 22,027 378.3% Pediatric/Other Vaccines 43,057 15,917 37.0% Total Vaccines 100,980 160,658 159.1% Biopharmaceuticals: Proleukin 30,588 (736) (2.4)% TOBI 38,566 10,741 27.9% Betaseron* 33,920 2,228 6.6% Other 5,446 (704) (12.9)% Total Biopharmaceuticals 108,520 11,529 10.6% TOTAL PRODUCT SALES, NET $257,054 $191,557 74.5% Revenues From Joint Business Arrangement $26,028 $2,285 8.8% Collaborative Agreement Revenues 4,356 (1,348) (30.9)% Royalty and License Fee Revenues 60,397 3,208 5.3% Other Revenues 8,489 2,555 30.1% TOTAL REVENUES $356,324 $198,257 55.6% Gross Margins Blood Testing 44% (6)% Vaccines 58% (9)% Biopharmaceuticals 67% (1)% TOTAL GROSS MARGINS 60% (8)% * Excludes Betaferon Royalty $13,202 $3,456 26.2% CHIRON CORPORATION Supplemental YTD Revenue Summary (Pro Forma) USD $ (in thousands) Twelve Months Ended Change December 31, from Change 2003 2002 Prior Year % Product Sales, net Blood Testing Ortho $28,391 $22,652 $5,739 25.3% NAT 200,066 125,465 74,601 59.5% Total Blood Testing 228,457 148,117 80,340 54.2% Vaccines Flu Vaccines 332,428 89,995 242,433 269.4% Meningococcus Vaccines 65,548 54,971 10,577 19.2% Travel Vaccines 87,831 64,335 23,496 36.5% Pediatric/Other Vaccines 192,511 147,963 44,548 30.1% Total Vaccines 678,318 357,264 321,054 89.9% Biopharmaceuticals: Proleukin 115,075 114,281 794 0.7% TOBI 172,047 146,874 25,173 17.1% Betaseron* 124,936 118,513 6,423 5.4% Other 27,000 29,072 (2,072) (7.1)% Total Biopharmaceuticals 439,058 408,740 30,318 7.4% TOTAL PRODUCT SALES, NET $1,345,833 $914,121 $431,712 47.2% Revenues From Joint Business Arrangement $108,298 $104,576 $3,722 3.6% Collaborative Agreement Revenues 18,562 22,142 (3,580) (16.2)% Royalty and License Fee Revenues 250,142 198,816 51,326 25.8% Other Revenues 29,113 36,625 (7,512) (20.5)% TOTAL REVENUES $1,751,948 $1,276,280 $475,668 37.3% Gross Margins Blood Testing 41% 41% 0% Vaccines 53% 58% (5)% Biopharmaceuticals 72% 73% (1)% TOTAL GROSS MARGINS 58% 63% (5)% * Excludes Betaferon Royalty $63,768 $46,937 $16,831 35.9% SOURCE Chiron Corporation -0- 01/28/2004 /CONTACT: Chiron Corporate Communications & Investor Relations, Media: +1-510-923-6500, or Investors: +1-510-923-2300/ /Web site: http://www.chiron.com / (CHIR) CO: Chiron Corporation ST: California IN: HEA MTC BIO SU: ERN CCA