Press Release

HUTCHMED Highlights Clinical Data to be Presented at ESMO Congress 2024 and the 2024 World Conference of Lung Cancer

Hong Kong, Shanghai & Florham Park, NJ - Monday, September 9, 2024: HUTCHMED (China) Limited ("HUTCHMED") (Nasdaq/AIM:HCM; HKEX:13) today announces that new and updated data from several studies of compounds discovered by HUTCHMED will be presented at the 2024 World Conference on Lung Cancer ("WCLC24") in San Diego, USA, and the European Society for Medical Oncology ("ESMO") Congress 2024, taking place in Barcelona, Spain.

Results from the FLOWERS study, a prospective, two-arm, randomized, multicenter Phase II clinical trial of osimertinib with or without savolitinib as first-line treatment in EGFRm, MET-aberrant advanced non-small cell lung cancer ("NSCLC") patients, will be presented at WCLC24. As of May 28, 2024, the median follow-up was 8.2 months. Patients treated with osimertinib plus savolitinib (Cohort 2, N=21) showed deeper and more durable response over osimertinib monotherapy (Cohort 1, N=23) along the study follow-up. The confirmed objective response rate (ORR) in Cohort 1 and Cohort 2 were 60.9% and 90.5%, respectively, with disease control rate (DCR) of 87% and 95.2%, respectively. Immature progression-free survival ("PFS") data also showed a positive trend in favor of the combination therapy, with median PFS of 9.3 months and 19.6 months in the cohort 1 and cohort 2 with maturity of 34.8% and 23.8%, respectively. Safety profiles of osimertinib monotherapy and osimertinib plus savolitinib were as expected, tolerable and manageable.

Further analysis of fruquintinib's FRESCO-2 study in metastatic colorectal cancer and FRUTIGA study in gastric cancer, a biomarker study of savolitinib in gastric cancer as well as investigator-initiated studies of fruquintinib and surufatinib will be presented at the ESMO Congress 2024. Details of the presentations are as follows:

About HUTCHMED

HUTCHMED (Nasdaq/AIM:​HCM; HKEX:​13) is an innovative, commercial-stage, biopharmaceutical company. It is committed to the discovery, global development and commercialization of targeted therapies and immunotherapies for the treatment of cancer and immunological diseases. It has approximately 5,000 personnel across all its companies, at the center of which is a team of about 1,800 in oncology/immunology. Since inception, HUTCHMED has focused on bringing cancer drug candidates from in-house discovery to patients around the world, with its first three medicines marketed in China, the first of which is also marketed in the US and Europe. For more information, please visit: www.hutch-med.com or follow us on LinkedIn.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements reflect HUTCHMED's current expectations regarding future events, including but not limited to its expectations regarding the therapeutic potential of fruquintinib, savolitinib and surufatinib, the further clinical development for fruquintinib, savolitinib and surufatinib, its expectations as to whether any studies on fruquintinib, savolitinib and surufatinib, would meet their primary or secondary endpoints, and its expectations as to the timing of the completion and the release of results from such studies. Such risks and uncertainties include, among other things, assumptions regarding enrollment rates and the timing and availability of subjects meeting a study's inclusion and exclusion criteria; changes to clinical protocols or regulatory requirements; unexpected adverse events or safety issues; the ability of fruquintinib, savolitinib and surufatinib, including as combination therapies, to meet the primary or secondary endpoint of a study, to obtain regulatory approval in different jurisdictions and to gain commercial acceptance after obtaining regulatory approval; the potential markets of fruquintinib, savolitinib and surufatinib for a targeted indication, and the sufficiency of funding. In addition, as certain studies rely on the use of CAPEOX, docetaxel, gemcitabine, nab-paclitaxel, paclitaxel, pemetrexed, platinum, sintilimab, topotecan, tislelizumab or toripalimab as combination therapeutics, such risks and uncertainties include assumptions regarding their safety, efficacy, supply and continued regulatory approval. Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. For further discussion of these and other risks, see HUTCHMED's filings with the U.S. Securities and Exchange Commission, The Stock Exchange of Hong Kong Limited and on AIM. HUTCHMED undertakes no obligation to update or revise the information contained in this press release, whether as a result of new information, future events or circumstances or otherwise.

Medical Information

This press release contains information about products that may not be available in all countries, or may be available under different trademarks, for different indications, in different dosages, or in different strengths. Nothing contained herein should be considered a solicitation, promotion or advertisement for any prescription drugs including the ones under development.

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