PegBio Co., Ltd. — Share Issue/Capital Change 2026

Feb 4, 2026

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Monthly Return for Equity Issuer and Hong Kong Depositary Receipts listed under Chapter 19B of the Exchange Listing Rules on Movements in Securities

For the month ended:	31 January 2026						Status:	New Submission
To : Hong Kong Exchanges and Clearing Limited
Name of Issuer:	PegBio Co., Ltd.
Date Submitted:	04 February 2026
	I. Movements in Authorised / Registered Share Capital
1. Class of shares	Ordinary shares		Type of shares	H		Listed on the Exchange (Note 1)		Yes
Stock code (if listed)	02565		Description		H Shares
			Number of authorised/registered shares			Par value				Authorised/registered share capital
Balance at close of preceding month			284,300,339		RMB		1	RMB	284,300,339
Increase / decrease (-)			0					RMB
	Balance at close of the month		284,300,339			RMB 1 RMB			284,300,339
2. Class of shares	Ordinary shares		Type of shares		Other type (specify in description)			Listed on the Exchange (Note 1)
Stock code (if listed)	N/A		Description	Unlisted Shares
		Number of authorised/registered shares			Par value			Authorised/registered share capital
Balance at close of preceding month			106,791,193		RMB	1		RMB	106,791,193
Increase / decrease (-)			0					RMB	0
Balance at close of the month			106,791,193			1		RMB	106,791,193

Remarks:

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Total authorised/registered share capital at the end of the month: RMB 391,091,532

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As the Company is a joint stock company incorporated in the People's Republic of China, the concept of "authorised share capital" is not applicable. The information contained in section I refers to the "registered share capital".

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II. Movements in Issued Shares and/or Treasury Shares and Public Float Sufficiency Confirmation

1. Class of shares	Ordinary shares		Type of shares	H		Listed on the Exchange (Note 1)		Yes
Stock code (if listed)	02565		Description		H Shares
		Number of issued shares (excluding treasury shares)				Number of treasury shares		Total number of issued shares
Balance at close of preceding month		284,300,339				284,300,339
Increase / decrease (-)		0				0
Balance at close of the month			284,300,339		0			284,300,339

Public float sufficiency confirmation (Note 4)

Pursuant to Main Board Rule 13.32D(1) or 19A.28D(1) / GEM Rule 17.37D(1) or 25.21D(1), we hereby confirm that, in relation to the class of shares as set out above, as at the close of the
month:
the applicable public float requirement (see below) has been complied with ✔
the applicable public float requirement (see below) has not been complied with
The applicable minimum public float requirement for the class of shares as set out above pursuant to Main Board Rule 13.32B or 19A.28B / GEM Rule 17.37B or 25.21B (as the case may be) is:
Applicable public float threshold	Initial Prescribed Threshold - 25% of the total number of issued shares in the class to which the listed shares belong
	(excluding treasury shares)
Additional information	The above public float level is confirmed based on publicly available information and the best knowledge of the Company.

2. Class of shares	Ordinary shares		Type of shares	Other type(specify in description)		Listed on the Exchange (Note 1)		No
Stock code (if listed)	N/A		Description		Unlisted Shares
		Number of issued shares (excluding treasury shares)		Number of treasury shares			Total number of issued shares
Balance at close of preceding month			106,791,193		0			106,791,193
Increase / decrease (-)			0		0
Balance at close of the month			106,791,193		0			106,791,193

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III. Details of Movements in Issued Shares and/or Treasury Shares

(A). Share Options (under Share Option Schemes of the Issuer) Not applicable

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(B). Warrants to Issue Shares of the Issuer Not applicable

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(D). Any other Agreements or Arrangements to Issue Shares of the Issuer, including Options (other than Share Option Schemes) Not applicable

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(E). Other Movements in Issued Shares and/or Treasury Shares Not applicable

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IV. Information about Hong Kong Depositary Receipt (HDR) Not applicable

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V. Confirmations Not applicable

Submitted by: HUANG Yifeng

Title: Joint Company Secretary

(Director, Secretary or other Duly Authorised Officer)

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Notes

• 1. The Exchange refers to The Stock Exchange of Hong Kong Limited.
• 1. In the case of repurchase of shares (shares repurchased and cancelled) and redemption of shares (shares redeemed and cancelled), "date of event" should be construed as "cancellation date".

In the case of repurchase of shares (shares held as treasury shares), "date of event" should be construed as "date on which shares were repurchased and held by the issuer in treasury".

• 1. The information is required in the case of repurchase of shares (shares repurchased for cancellation but not yet cancelled) and redemption of shares (shares redeemed but not yet cancelled). Please state the number of shares repurchased or redeemed during the month or in preceding month(s) but pending cancellation as at close of the month as a negative number.
• 1. "Initial Prescribed Threshold", "Alternative Threshold" and "market value" have the meanings ascribed thereto under Main Board Rule 13.32A or 19A.28A / GEM Rule 17.37A or 25.21A. See also Main Board Rule 13.32D(4) or 19A.28D(4) / GEM Rule 17.37D(4) or 25.21D(4) on the basis of the public float disclosure.
• 1. Items (i) to (viii) are suggested forms of confirmation. The listed issuer may amend the item(s) that is/are not applicable to meet individual cases. Where the issuer has already made the relevant confirmations in a return published under Main Board Rule 13.25A / GEM Rule 17.27A in relation to the securities issued, or the treasury shares sold or transferred, no further confirmation is required to be made in this return.
• 1. "Identical" means in this context:
• . the securities are of the same nominal value with the same amount called up or paid up;
• . they are entitled to dividend/interest at the same rate and for the same period, so that at the next ensuing distribution, the dividend/interest payable per unit will amount to exactly the same sum (gross and net); and
• . they carry the same rights as to unrestricted transfer, attendance and voting at meetings and rank pari passu in all other respects.

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