WuXi Biologics Cayman : VOLUNTARY ANNOUNCEMENT RESTRUCTURING OF THE WUXI VACCINES COMPANIES

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WUXI BIOLOGICS (CAYMAN) INC.

藥明生物技術有限公司*

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 2269)

VOLUNTARY ANNOUNCEMENT

RESTRUCTURING OF THE WUXI VACCINES COMPANIES

This announcement is made by WuXi Biologics (Cayman) Inc. (the "Company", together with its subsidiaries, the "Group") on a voluntary basis.

Reference is made to the announcements of the Company dated February 18, 2020, May 20, 2019 and July 18, 2018 (the "Announcements") in relation to, among other things, the joint

venture established by the Company and Shanghai Hile Bio-pharmaceutical Co., Ltd. (上海 海利生物技術股份有限公司) ("Hile", a company listed on the Shanghai Stock Exchange

(stock code: 603718)). Unless otherwise defined herein, capitalized terms used in this announcement shall have the same meanings as defined in the Announcements.

The Company is pleased to announce that the Company and Hile intend to implement a

series of restructuring steps (the "Restructuring") involving WuXi Vaccines (Hong Kong) Limited and WuXi Vaccines Co., Ltd. (上海藥明海德生物科技有限公司) (collectively,

the "WuXi Vaccines Companies"). As of the date hereof, the Company and Hile hold, directly and indirectly, 70% and 30% shareholding interests in each of the WuXi Vaccines Companies. Upon completion of the Restructuring, the Company and Hile will hold 70% and 30% shareholding interests in a new investment holding company, namely, WuXi Vaccines (Cayman) Inc., which will hold the entire shareholding interest in each of the WuXi Vaccines Companies. As such, the Restructuring does not change the percentage of shareholding interests held by the Company and Hile in the WuXi Vaccines Companies. It is believed that the Restructuring will streamline the shareholding structure of the WuXi Vaccines Companies, and thereby enables more efficient management and minimizes the administrative costs and expenses of the joint venture.

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Further announcement(s) will be made by the Company as and when required.

By order of the Board

WuXi Biologics (Cayman) Inc.

Dr. Ge Li

Chairman

Hong Kong, April 1, 2021

As of the date of this announcement, the Board comprises Dr. Zhisheng Chen and Dr. Weichang Zhou as executive Directors; Dr. Ge Li, Mr. Edward Hu, Mr. Yibing Wu and Mr. Yanling Cao as non-executive Directors; and Mr. William Robert Keller, Mr. Teh-Ming Walter Kwauk and Mr. Kenneth Walton Hitchner III as independent non-executive Directors.

*  For identification purpose only

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