/Junshi Biotechnology H Share Announcement
NEWS

Junshi Biotechnology H Share Announcement

Shanghai Stock Exchange
2025/12/05

FF301

Monthly returns on movements in securities of equity issuers and issuers of Hong Kong depositary receipts listed under Chapter 19B of the Listing Rules

Ending Month: November 30, 2025 Status: New Submission

To: Hong Kong Exchanges and Clearing Limited

Company Name: Shanghai Junshi Biomedical Technology Co., Ltd.

Submission date: December 4, 2025

I. Changes in statutory/registered share capital

  1. Share classification Ordinary shares Share class H Listed on the Hong Kong Stock Exchange (Note 1) Yes

Securities code (if listed) 01877 Description

Number of authorized/registered shares Par value Authorized/registered share capital

Balance at the end of last month 260,295,700RMB 1RMB 260,295,700 Increase / decrease (-) 0 RMB 0 Balance at the end of this month 260,295,700RMB 1RMB 260,295,700

  1. Classification of shares Ordinary shares Share class A Listed on the Hong Kong Stock Exchange (Note 1) No

Securities code (if listed) 688180 Description Listed on the Science and Technology Innovation Board of the Shanghai Stock Exchange

Number of authorized/registered shares Par value Authorized/registered share capital

Balance at the end of last month 766,394,171RMB 1RMB 766,394,171 Increase / decrease (-) 0 RMB 0 Balance at the end of this month 766,394,171RMB 1RMB 766,394,171

Total statutory/registered share capital at the end of this month: RMB 1,026,689,871

Page 1 of 10 v1.1.1

FF301

II. Changes in issued shares and/or treasury shares

  1. Share classification Ordinary shares Share class H Listed on the Hong Kong Stock Exchange (Note 1) Yes

Securities code (if listed) 01877 Description

Number of shares issued (excluding treasury shares) Number of treasury shares Total shares issued

Balance at the end of last month 260,295,700 0 260,295,700 Increase / decrease (-) 0 0

Balance at the end of this month 260,295,700 0 260,295,700

  1. Classification of shares Ordinary shares Share class A Listed on the Hong Kong Stock Exchange (Note 1) No

Securities code (if listed) 688180 Description Listed on the Science and Technology Innovation Board of the Shanghai Stock Exchange

Number of shares issued (excluding treasury shares) Number of treasury shares Total shares issued

Balance at the end of last month 765,578,300 815,871 766,394,171Increase / decrease (-) 0 0

Balance at the end of this month 765,578,300 815,871 766,394,171

Page 2 of 10 v1.1.1

FF301

III. Details of changes in issued shares and/or treasury shares

(A). Share options (under the issuer’s share option plan)

  1. Share classification Ordinary shares Share class H Listed on the Hong Kong Stock Exchange (Note 1) Yes

Securities code (if listed) 01877 Description

The number of share options that may be outstanding at the end of this month according to the plan at the end of last month. The number of share options that may be outstanding at the end of this month. The number of new shares issued during this month. The share options that may be issued or granted at the end of this month and be exercised. Changes in the share option plan during this month.

Item Item (A1) Number of treasury shares (A2) Number of shares transferred from treasury Shares issued or transferred from treasury

Total number of copies1). Approved and adopted on September 29, 2025 13,210,000 13,210,000 0 0 0 64,227,400

H-share stock option incentive plan

Approval date at the general meeting of shareholders (if applicable) September 29, 2025

  1. Classification of shares Ordinary shares Share class A Listed on the Hong Kong Stock Exchange (Note 1) No

Securities code (if listed) 688180 Description Listed on the Science and Technology Innovation Board of the Shanghai Stock Exchange

The number of share options that may be outstanding at the end of this month according to the plan at the end of last month. The number of share options that may be outstanding at the end of this month. The number of new shares issued during this month. The share options that may be issued or granted at the end of this month and be exercised. Changes in the share option plan during this month.

Item Item (A1) Number of treasury shares (A2) Number of shares transferred from treasury Shares issued or transferred from treasury

Total number of copies1). Approved and adopted on September 29, 2025 25,150,000 Canceled -450,000 24,700,000 0 0 0 815,871

A-share stock option incentive plan

Approval date at the general meeting of shareholders (if applicable) September 29, 2025

Increase in issued shares (excluding treasury shares): 0 common stock H (AA1)

Increase in shares outstanding (excluding treasury shares): 0 Common Stock A (AA1)

Decrease treasury shares: 0 common shares H (AA2)

Decrease treasury shares: 0 Common Stock A (AA2)

The total amount of funds received from the exercise of options during this month:

Remarks:

For further details, please refer to the Company's announcements dated September 2, 2025, September 29, 2025 and November 14, 2025, the circular dated September 5, 2025 and the supplementary circular dated September 15, 2025.

Page 3 of 10 v1.1.1

FF301 (B). Warrants committing to issue shares of the issuer Not applicable

Page 4 of 10 v1.1.1

FF301 (C). Convertible Notes (that is, convertible into shares of the issuer) Not applicable

Page 5 of 10 v1.1.1

FF301 (D). Any other agreement or arrangement entered into for the issue of shares of the issuer, including options (but excluding options issued under a share option plan) Not applicable

Page 6 of 10 v1.1.1

FF301 (E). Other changes in issued shares and/or treasury shares Not applicable

Total increase/decrease (-) in issued shares (excluding treasury shares) during the month (i.e., the sum of items AA1 to EE1): 0 ordinary shares H Total increase/decrease (-) in issued shares (excluding treasury shares) during the month (i.e., the sum of items AA1 to EE1): 0 ordinary shares A Total increase/decrease (-) in total treasury shares (i.e., the sum of items AA2 to EE2) during the month: 0 ordinary shares H Total increase/decrease (-) in total treasury shares during this month (i.e. the sum of items AA2 to EE2): 0 Ordinary shares A

Page 7 of 10 v1.1.1

FF301 IV. Information on Hong Kong Depositary Receipts (Depositary Receipts) Not applicable

Page 8 of 10 v1.1.1

FF301 V. Confirm

Pursuant to Main Board Rule 13.25C / GEM Rule 17.27C, we hereby confirm that, to the best of our knowledge and belief, every issue of securities or sale or transfer of treasury shares of the Issuer during the month (as described in Parts III and IV but has not been made in accordance with Main Board Rule 13.25A / disclosed in statements published under Rule 17.27A of the GEM Listing Rules) has been duly authorized and approved by the issuer’s board of directors and has been carried out in compliance with all applicable listing rules, legal and other regulatory requirements, and where applicable: (Note 4)

(i) the listed issuer has received all monies due to it from the issuance of securities or the sale or transfer of treasury shares;

(ii) All conditions precedent to listing specified under the "Listing Qualifications" of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited have been fulfilled;

(iii) all conditions (if any) set out in the official letter approving the listing and trading of the securities have been fulfilled;

(iv) Each class of securities is identical in all respects (Note 5);

(v) All documents required to be filed with the Registrar of Companies under the Companies (Winding Up and Miscellaneous Provisions) Ordinance have been duly filed and all other legal requirements have been complied with;

(vi) It is confirmed that documents of title have been sent/are being prepared for sending/are being prepared and will be sent in accordance with the terms of the issue, sale or transfer;

(vii) the transactions for all properties that have been purchased or agreed to be purchased by the issuer as shown in the issuer's listing documents have been completed; the purchase consideration for all such properties has been paid; and

(viii) A trust deed/deed of trust in respect of the bonds, loan shares, notes or debentures has been prepared and executed and the relevant details have been filed with the Registrar of Companies (if so required by law). Remarks:

Since the Company is a company incorporated in the People's Republic of China, the concept of "authorized share capital" does not apply to the Company. The information shown under "Authorized/Registered Share Capital" in Part I above refers to the company's registered share capital.

Submitted by: Wang Zhengyu

Position: Joint Company Secretary

(Director, secretary or other duly authorized person)

Page 9 of 10 v1.1.1

FF301 Note

  1. Hong Kong Stock Exchange refers to The Stock Exchange of Hong Kong Limited.

  2. In the case of repurchase of shares (shares repurchased and canceled) and redemption of shares (shares redeemed and canceled), the "date of occurrence" shall be understood as the "date of cancellation".

In the case of a repurchase of shares (shares held as treasury shares), the "date of the event" should be read as the "date on which the issuer repurchases and holds the shares in treasury".

  1. Relevant information must be provided in the case of share repurchase (share repurchase intended to be canceled but not yet cancelled) and redemption of shares (shares redeemed but not yet cancelled). Please use a negative number to indicate the shares that were repurchased or redeemed this month or in previous months but have yet to be canceled as of the end of this month.

number of copies.

  1. Items (i) to (viii) are recommended formats for confirmation content. Listed issuers may amend the applicable items on a case-by-case basis. If the issuer has previously issued or sold or transferred treasury shares in respect of a securities in accordance with Main Board Listing Rules 13.25A /

If the relevant confirmation is made in the report published under Rule 17.27A of the GEM Listing Rules, no further confirmation is required in this report.

  1. “Same” here means:

· The par value of the securities is the same and the amount payable or fully paid is also the same;

· The securities are entitled to receive dividends/interests calculated at the same interest rate during the same period, and the amount of dividends/interests payable per unit will be exactly the same (gross and net amounts) when the next dividend is paid; and

· The securities carry the same rights, such as unrestricted transfer, attendance and voting at meetings, and pari passu in all other respects.

Page 10 of 10 v1.1.1