SinoMab BioScience Limited — Transaction in Own Shares 2020

Jun 5, 2020

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)

GRANT OF RESTRICTED SHARE UNITS

Reference is made to the prospectus dated 31 October 2019 and 2019 annual report dated 27 April 2020 of SinoMab BioScience Limited (中國抗體製藥有限公司) (the “ Company ”, together with its subsidiaries, the “ Group ”) in relation to the Company’s restricted share unit scheme (the “ RSU Scheme ”).

The board of directors (the “ Board ”) of the Company hereby announces that, on 5 June 2020, the Company has resolved to make a grant of restricted share units under the RSU Scheme which was conditionally adopted on 18 October 2019 with effect from 12 November 2019. The RSU Scheme aims to incentivise the directors, senior management and employees of the Group for their contribution to the Group and to attract, motivate and retain skilled and experienced personnel to strive for the future development and expansion of the Group, by providing them with the opportunity to own equity interests in the Company. Shares representing the maximum overall limit of ordinary shares of the Company (being 36,174,400 ordinary shares of the Company) pursuant to the RSU Scheme were issued and allotted to Skytech Technology Limited before the listing of the Company for the purpose of establishing the RSU Scheme and are currently held by Computershare Hong Kong Nominees Limited (“ Computershare ”) for the beneficiaries of the RSU Scheme.

On 5 June 2020, the Company granted 10,062,404 restricted share units (the “ RSUs ”) under the RSU Scheme in respect of a total of 10,062,404 ordinary shares of the Company to an employee of the Company (the “ Grantee ”) (the “ Grant ”), representing 1% of the total issued share capital of the Company as at the date of this announcement. On the same date as the Grant, the RSUs were vested in the Grantee and Computershare transferred 10,062,404 ordinary shares of the Company to the Grantee.

No new ordinary share of the Company has been issued by the Company as a result of the Grant and therefore, there is no dilution effect on the existing shareholders of the Company. The closing price of the ordinary shares of the Company on the date of the Grant was HK$3.84.

As at the date of this announcement, the Grantee is not a director, chief executive or substantial shareholder (as defined under the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited (the “ Listing Rules ”)) of the Company, or any of their associates (as defined under the Listing Rules).

By Order of the Board SinoMab BioScience Limited Dr. Shui On LEUNG Executive Director, Chairman and Chief Executive Director

Hong Kong, 5 June 2020

As at the date of this announcement, the executive directors of the Company are Dr. Shui On LEUNG and Mr. Jing QIANG, the non-executive directors of the Company are Ms. Wenyi LIU, Dr. Haigang CHEN, Mr. Senlin LIU, Mr. Huiyuan MA and Mr. Xun DONG, and the independent non-executive directors of the Company are Mr. Dylan Carlo TINKER, Mr. Michael James Connolly HOGAN, Mr. Ping Cho Terence HON and Mr. George William Hunter CAUTHERLEY.