SinoMab BioScience Limited — Board/Management Information 2024

Sep 27, 2024

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

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SinoMab BioScience Limited 中國抗體製藥有限公司

(Incorporated in Hong Kong with limited liability)

(Stock code: 3681)

RESIGNATION OF NON-EXECUTIVE DIRECTOR

The board (the ‘‘Board’’) of directors (‘‘Director(s)’’) of SinoMab BioScience Limited (the ‘‘Company’’, together with its subsidiaries, the ‘‘Group’’) hereby announces that Dr. Wenyi LIU (‘‘Dr. Liu’’) has tendered her resignation as a non-executive Director with effect from 26 September 2024 in order to devote more time to personal affairs. Dr. Liu confirmed that she has no disagreement with the Board and there is no matter relating to her resignation that needs to be bought to the attention of the shareholders of the Company and The Stock Exchange of Hong Kong Limited.

The Board would like to express its sincere gratitude to Dr. Liu for her invaluable contribution to the Group during her tenure of service.

By Order of the Board SinoMab BioScience Limited Dr. Shui On LEUNG

Executive Director, Chairman and Chief Executive Officer

Hong Kong, 27 September 2024

As at the date of this announcement, the executive Directors are Dr. Shui On LEUNG and Mr. Shanchun WANG, the non-executive Directors are Dr. Haigang CHEN, Mr. Xun DONG, Mr. Lei SHI and Dr. Jianmin ZHANG, and the independent non-executive Directors are Mr. George William Hunter CAUTHERLEY, Mr. Ping Cho Terence HON, Dr. Chi Ming LEE and Mr. Dylan Carlo TINKER.