POLL RESULTS OF THE ANNUAL GENERAL MEETING HELD ON JUNE 7, 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.JACOBIO PHARMACEUTICALS GROUP CO. LTD.加科思药业集团有限公司 (Incorporated in the Cayman Islands with limited liability) (Stock Code: 1167) POLL RESULTS OF THE ANNUAL GENERAL MEETING HELD ON JUNE 7 2024 At the Annual General Meeting (the “AGM”) of JACOBIO PHARMACEUTICALS GROUP CO.LTD. (the “Company”) held on June 7 2024 all the proposed resolutions as set out in the notice of the AGM dated April 29 2024 were voted by way of poll. Unless the content otherwise requires capitalized terms used in this announcement shall have the same meanings as those defined in the Company’s circular dated April 29 2024 (the “Circular”).The Company’s branch share registrar in Hong Kong Computershare Hong Kong Investor Services Limited acted as the scrutineer for the vote-taking at the AGM.As at the date of the AGM the total number of issued shares of the Company was 791755080 shares the holders of which were entitled to attend and vote at the AGM. There were no restrictions on any Shareholders to cast votes on any of the proposed resolutions at the AGM.No Shareholders were required to abstain from voting on any of the proposed resolutions at the AGM under the Listing Rules. There were no Shares entitling the holders to attend the AGM and abstain from voting in favor of any of the proposed resolutions at the AGM under Rule 13.40 of the Listing Rules. No Shareholders had stated their intention in the Circular to vote against or to abstain from voting on any of the proposed resolutions at the AGM.The poll results in respect of all the resolutions proposed at the AGM are as follows: NO. OF VOTES (%) ORDINARY RESOLUTIONS FOR AGAINST 1. To receive and adopt the audited consolidated 500258576 0 financial statements and the reports of the (100.000%) (0.000%) directors of the Company (the “Directors”) and auditor for the year ended December 31 2023. 1NO. OF VOTES (%) ORDINARY RESOLUTIONS FOR AGAINST 2. (i) To re-e lect Ms. Yunyan HU as an 500087838 170738 executive Director. (99.966%) (0.034%) (ii) To re-elect Ms. Yanmin TANG as a non- 499616838 641738 executive Director. (99.872%) (0.128%) (iii) To re-elect Dr. Te-li CHEN as a non- 499616838 641738 executive Director. (99.872%) (0.128%) (iv) To authorize the board (the “Board”) of 500192576 66000 Directors to fix the remuneration of the (99.987%) (0.013%) Directors. 3. To appoint Deloitte Touche Tohmatsu as the 500258576 0 auditor of the Company and to authorize the (100.000%) (0.000%) Board to fix its remuneration. 4. To grant a general mandate to the Directors 493634732 6623844 to allot issue and deal with new shares of (98.676%) (1.324%) the Company (including any sale or transfer of the treasury shares of the Company on or after the Rule Amendment Effective Date) not exceeding 20% of the total number of issued shares of the Company (excluding treasury shares if any).* 5. To grant a general mandate to the Directors 500258576 0 to repurchase shares of the Company not (100.000%) (0.000%) exceeding 10% of the total number of issued shares of the Company (excluding treasury shares if any) and the Company may hold such repurchased shares in treasury on or after the Rule Amendment Effective Date. * 6. To extend the general mandate to issue 493634732 6623844 new shares by adding the number of shares (98.676%) (1.324%) repurchased. * * The full text of resolutions numbered 4 to 6 are set out in the notice of AGM dated April 29 2024. 2Notes: 1. As more than 50% of votes were cast in favor of each of the above ordinary resolutions all of the proposed resolutions were duly passed as ordinary resolutions of the Company. 2. All Directors attended the AGM in person or by electronic means. By order of the Board JACOBIO PHARMACEUTICALS GROUP CO. LTD.Yinxiang WANG Chairman Hong Kong June 7 2024 As at the date of this announcement the Board comprises Dr. Yinxiang WANG as Chairman and executive Director Ms. Xiaojie WANG and Ms. Yunyan HU as executive Directors Ms. Yanmin TANG and Dr. Te-li CHEN as non-executive Directors and Dr. Ruilin SONG Dr. Bai LU and Dr.Ge WU as independent non-executive Directors. 3