Overseas Regulatory Announcement

HUTCHMED (China) Limited ("HUTCHMED") notes the below text, which is from an announcement released to the Stock Exchange of Hong Kong Limited on February 28, 2025 pursuant to Chapter 14 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited. The text relates to the further update on dispatch timing of the extraordinary general meeting circular that relates to the transaction described in the announcement dated January 2, 2025, entitled "HUTCHMED Announces US$608 million Divestment of Non-Core Joint Venture".

HUTCHMED (China) Limited

和黃醫藥（中國）有限公司

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 13)

MAJOR TRANSACTION

IN RELATION TO

THE DISPOSAL OF 45% EQUITY INTEREST IN

SHANGHAI HUTCHISON PHARMACEUTICALS LIMITED

TIMING OF DISPATCH OF CIRCULAR

Reference is made to the announcement of HUTCHMED (China) Limited (the "Company") dated January 1, 2025 (the "January 1 Announcement") in relation to the proposed disposal of 45% equity interest in Shanghai Hutchison Pharmaceuticals Limited. Unless otherwise defined, capitalized terms used in this announcement shall have the same meanings as those defined in the January 1 Announcement.

In the Company's announcement dated January 28, 2025, it was mentioned that the Circular containing, among other things, (i) further details on the terms of the Proposed Disposal; and (ii) other information as required under the Listing Rules together with a notice convening the EGM, was expected to be dispatched to the Shareholders on or before February 28, 2025.

GP Health Service Capital has further informed the Seller that the designation to the GP Purchaser Fund and the Designated Purchaser is progressing but additional time is required for them to complete the designation. In view of this, the Company currently expects that the Circular will be dispatched to the Shareholders on or before March 31, 2025.

The Proposed Disposal is subject to all of the conditions under the Agreements being satisfied (or, if applicable, waived) and therefore may or may not become unconditional. If any of the conditions under the Agreements is not satisfied (or, if applicable, waived), the Proposed Disposal will not proceed. Shareholders and potential investors are reminded to exercise caution when dealing in the shares and other securities of the Company.

By Order of the Board

Edith Shih

Non-executive Director and Company Secretary

Hong Kong, February 28, 2025

As at the date of this announcement, the Directors of the Company are: