Interim Report 1 January - 30 June 2004


- Promising pre-clinical data for BioInvent’s cancer project: In laboratory experiments the Company’s antibodies inhibit important elements in vessel formation. - Important milestone reached in BioInvent's project to find treatment for joint diseases. A success fee will therefore be paid to Cartela. - A candidate drug for toxicology studies within the HIV project chosen at the end of March. - A development and production agreement entered into with a new customer, Orbus Medical Technology, Inc., USA. - Net revenues for January-June 2004: SEK 29.0 million (33.9). - Cash flow from current operations and investment activities for January – June 2004: SEK -54.1 million (-24.6). Liquid funds at the end of the period: SEK 214.6 million (319.3). - Loss after net financial items for January – June 2004 amounted to SEK -44.7 million (-44.4) and the loss after net financial items per share was SEK -1.52 (-1.51). Lund, 15 July 2004 Svein Mathisen, President and CEO We have briefly examined this interim report for the period 1 January 2004 – 30 June 2004 in accordance with the recommendation issued by the Swedish Institute of Authorised Public Accountants (FAR). A brief examination is very limited compared to a full audit. We have found nothing to indicate that this interim report does not meet the requirements of the stock exchange and annual accounts laws. Lund, 15 July 2004 ERNST & YOUNG AB Åke Stenmo, Authorised Public Accountant Contact: Any questions regarding this report will be answered by: Svein Mathisen, President & CEO, tel.+46 (0)46 286 85 67, mobile +46 (0)708 97 82 13 Cristina Glad, Executive Vice President, +46 (0)46 286 85 51, mobile +46 (0)708 16 85 70. The report is also available at www.bioinvent.com BioInvent International AB (publ.) Co. reg. no. 556537-7263 Address: Sölvegatan 41, 223 70 Lund Tel.: +46 (0)46 286 85 50 info@bioinvent.com Legal disclaimer This press release contains statements about the future, consisting of subjective assumptions and forecasts for future scenarios. Predictions for the future only apply as of the date they are made and are, by their very nature, in the same way as research and development work in the biotech segment, associated with risk and uncertainty. With this in mind, the actual out-come may deviate significantly from the scenarios described in this press release.

About Us

BioInvent International AB is a research-based pharmaceutical company focused on discovery and development of innovative antibody-based drugs against cancer. The Company's pipeline currently includes three product candidates for the treatment of cancer. The company has unique expertise in antibody drug development from initial concept to late clinical phase. The antibody library n-CoDeR and the screening tool F.I.R.S.T. are two patented tools that enable identification of relevant human antibodies and disease targets during the discovery phase. The scope and strength of this platform is also used to develop antibody-based drugs in collaboration with partners who finance the development of the new drug, and provide BioInvent the right to milestone payments and royalties on sales. These partners include Bayer HealthCare, Daiichi Sankyo, Mitsubishi Tanabe and Servier. More information is available at www.bioinvent.com.

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