HUTCHMED (HCM) showcases ATTC and surufatinib study data at AACR 2026
Rhea-AI Filing Summary
HUTCHMED (China) Limited is highlighting new oncology research that will be presented at the AACR Annual Meeting 2026 in San Diego from April 17-22, 2026. The presentations focus on its antibody-targeted therapy conjugate (ATTC) platform and combination regimens for difficult gastrointestinal cancers.
Preclinical data for HMPL-A580, a first-in-class PI3K/PIKK-EGFR ATTC, show potent and selective kinase inhibition with IC50 values around 1–10 nM and strong anti-tumor effects in EGFR-expressing models. In mouse xenograft models, weekly intravenous dosing at 1–10 mg/kg produced dose-dependent tumor growth inhibition and favorable pharmacokinetics in non-human primates.
Updated clinical data will also be presented from a multicenter Phase Ib/II trial of surufatinib plus sintilimab and capecitabine in metastatic small bowel and appendiceal cancers, and from an exploratory Phase II study combining surufatinib with gemcitabine and nab-paclitaxel in locally advanced or metastatic pancreatic ductal adenocarcinoma following induction therapy.
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Key Figures
Key Terms
antibody-targeted therapy conjugate medical
PI3K/PIKK medical
xenograft models medical
angio-immuno kinase inhibitor medical
PAM pathway medical
tumor-associated macrophages medical
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE
SECURITIES EXCHANGE ACT OF 1934
For the Month of April 2026
Commission File Number: 001-37710
HUTCHMED (CHINA) LIMITED
(Translation of registrant’s name into English)
48th Floor, Cheung Kong Center, 2 Queen’s Road Central, Hong Kong
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F ⌧ Form 40-F ◻
HUTCHMED (CHINA) LIMITED
Form 6-K
EXHIBIT INDEX
Exhibit No. | | Description |
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Exhibit 99.1 | | Press release relating to data to be presented at AACR Annual Meeting 2026 |
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SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
| HUTCHMED (CHINA) LIMITED | |
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| By: | /s/ Johnny Cheng |
| Name: | Johnny Cheng |
| Title: | Chief Financial Officer |
Date: April 9, 2026
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Exhibit 99.1
Press Release
HUTCHMED Highlights Data to be Presented at AACR Annual Meeting 2026
Hong Kong, Shanghai & Florham Park, NJ — Thursday, April 9, 2026: 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 upcoming American Association of Cancer Research (AACR) Annual Meeting 2026, taking place on April 17-22, 2026 in San Diego, California.
Preclinical data for HMPL-A580, a first-in-class PI3K/PIKK-EGFR Antibody-Targeted Therapy Conjugate (“ATTC”) will be presented. The payload of HMPL-A580 potently inhibited PI3K and PIKK family kinases, with IC50 ranging around 1 to 10 nM. Eurofins profiling across 418 kinases revealed the payload has excellent selectivity. By conjugating this potent payload with an anti-EGFR antibody via a cleavable linker, the ATTC compound HMPL-A580 demonstrated robust anti-tumor effect. Upon binding to EGFR-expression cancer cell line, HMPL-A580 underwent rapid internalization, lysosomal trafficking, payload release, and PAM and PIKK signaling inhibition to induce tumor cell apoptosis. In a 38-human solid tumor cell line panel, HMPL-A580 potently inhibited EGFR-expression tumor cell proliferation. The tumor cells harboring EGFR high expression, EGFR mut or PAM alterations were more sensitive to HMPL-A580. HMPL-A580 showed a strong bystander effect when EGFR-negative cells co-cultured with EGFR-expression cells. In human tumor xenograft models in mice, HMPL-A580, administered intravenously at 1~10 mg/kg once weekly for two weeks, demonstrated a dose / exposure-dependent anti-tumor activity in multiple EGFR-expression models, which is associated with much stronger target inhibition and suppression of downstream functions than antibody and payload alone treatment. The preliminary results demonstrated that HMPL-A580 was stable in human, monkey, rat and mouse plasma, and showed favorable PK property in cynomolgus monkeys.
Updated results from a multicenter, single-arm Phase Ib/II trial of surufatinib plus sintilimab and capecitabine in previously treated metastatic small bowel adenocarcinoma and appendiceal carcinoma, as well as results from a exploratory Phase II study of surufatinib combined with gemcitabine and nab-paclitaxel (“AG”) for the treatment of locally advanced or metastatic pancreatic ductal adenocarcinoma patients following AG induction therapy will also be presented.
Details of the presentations are as follows:
Abstract title | Presenter / Lead author | Presentation details |
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SPONSORED STUDIES | ||
Discovery of HMPL-A580, a first-in-class antibody-targeted therapy conjugate (ATTC) of a novel PI3K/PIKK inhibitor payload linked to an anti-EGFR antibody | Yu Cai, HUTCHMED, Shanghai, China | 4549 Poster Session (PO.ET01.03) Tuesday, April 21, 2026 |
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INVESTIGATOR-INITIATED STUDIES | ||
Updated multicenter phase Ib/II analysis of surufatinib plus sintilimab and capecitabine in previously treated metastatic small bowel adenocarcinoma and appendiceal carcinoma | Xiaoyu Xie, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China | CT160 Poster Session (PO.CT01.05) Monday, April 20, 2026 |
Sequential treatment with surufatinib combined with gemcitabine and nab-paclitaxel (AG) or AG alone as first-line therapy for locally advanced or metastatic pancreatic ductal adenocarcinoma (mPDAC) after 6 weeks of AG induction therapy: A two-cohort, exploratory phase II study | Jin Xu, Fudan University Shanghai Cancer Center, Shanghai, China | CT146 Poster Session (PO.CT01.05) Monday, April 20, 2026 |
About the ATTC Platform and HMPL-A580
HUTCHMED’s ATTC platform represents a next-generation approach to precision oncology, combining monoclonal antibodies with proprietary small-molecule inhibitor payloads to deliver dual mechanisms of action. Unlike traditional cytotoxin-based Antibody Drug Conjugates, ATTCs combine targeted therapies to achieve synergistic anti-tumor activity and durable responses in preclinical models, outperforming standalone antibody or small-molecule inhibitor components in efficacy and safety.
The first family of ATTCs are based on a novel payload that targets the PI3K/AKT/mTOR (“PAM”) pathway, a critical intracellular network involved in cell growth, survival, and division. Alterations in the PAM pathway are frequently associated with poor prognosis and resistance to treatment across various cancers. However, existing PAM-targeted drugs face significant challenges, including on-target toxicities that restrict dosing, feedback loops that enable pathway reactivation, and insufficient tumor-specific delivery. Preclinical data from the first ATTC candidate based on this potent novel PI3K/PIKK inhibitor payload, HMPL-A251, was presented at AACR-NCI-EORTC in October 2025.
HMPL-A580 is the second ATTC candidate based on this novel payload. It is a first-in-class ATTC comprising a highly selective and potent PI3K/PIKK small-molecule inhibitor payload linked to an anti-EGFR antibody via a cleavable linker. EGFR is highly expressed in multiple types of solid tumors and is well recognized as a driving force in tumorigenesis and disease progression. By conjugating this highly novel PI3K/PIKK payload to an anti-EGFR antibody, HMPL-A580 is designed to deliver targeted pathway inhibition directly into EGFR-expressing tumor cells, thereby potentially overcoming the systemic toxicity and narrow therapeutic index historically associated with PI3K/PIKK inhibitors. This approach aims to achieve deeper and more durable target inhibition while improving the overall tolerability profile.
HUTCHMED has demonstrated how its partnerships leverage the expertise of multinational pharmaceutical companies to accelerate bringing novel medicines to address large unmet needs around the world, and plans to apply this strategy to its ATTC technology this year.
About Surufatinib
Surufatinib is a novel, oral angio-immuno kinase inhibitor that selectively inhibits the tyrosine kinase activity associated with VEGFRs and fibroblast growth factor receptor (FGFR), which both inhibit angiogenesis, and colony stimulating factor-1 receptor (CSF-1R), which regulates tumor-associated macrophages, promoting the body’s immune response against tumor cells. Surufatinib is marketed in China by HUTCHMED under the brand name SULANDA®. HUTCHMED currently retains all rights to surufatinib worldwide.
About HUTCHMED
HUTCHMED (Nasdaq/AIM:HCM; HKEX:13) is an innovative, commercial-stage, biopharmaceutical company. It is committed to the discovery and global development and commercialization of targeted therapies and immunotherapies for the treatment of cancer and immunological diseases. Since inception it has focused on bringing 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 approved around the world including in the US, Europe and Japan. 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 its expectations regarding the therapeutic potential of surufatinib, HMPL-A580 and other drug candidates from the ATTC platform and the further development of surufatinib, HMPL-A580 and other drug candidates from the ATTC platform in this and other indications. Forward-looking statements involve risks and uncertainties. Such risks and uncertainties include, among other things, assumptions regarding the timing and outcome of clinical studies and the sufficiency of clinical data to support an new drug application submission of surufatinib, HMPL-A580 and other drug candidates from the ATTC platform in China or other jurisdictions, its potential to gain approvals from regulatory authorities on an expedited basis or at all, the efficacy and safety profile of surufatinib, HMPL-A580 and other drug candidates from the ATTC platform, HUTCHMED’s ability to fund, implement and complete its further clinical development and commercialization plans for surufatinib, HMPL-A580 and other drug candidates from the ATTC platform and the timing of these events. In addition, as certain studies rely on the use of sintilimab, capecitabine, gemcitabine and nab-paclitaxel, 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 US 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.
CONTACTS
Investor Enquiries | +852 2121 8200 / ir@hutch-med.com |
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Media Enquiries | |
FTI Consulting – | +44 20 3727 1030 / HUTCHMED@fticonsulting.com |
Ben Atwell / Tim Stamper | +44 7771 913 902 (Mobile) / +44 7779 436 698 (Mobile) |
Brunswick – Zhou Yi | +852 9783 6894 (Mobile) / HUTCHMED@brunswickgroup.com |
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Panmure Liberum | Nominated Advisor and Joint Broker |
Atholl Tweedie / Emma Earl / Rupert Dearden | +44 20 7886 2500 |
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Cavendish | Joint Broker |
Geoff Nash / Nigel Birks | +44 20 7220 0500 |
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Deutsche Numis | Joint Broker |
Freddie Barnfield / Jeffrey Wong / Duncan Monteith | +44 20 7260 1000 |