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.

This announcement is made for information purposes only and does not constitute an invitation or offer to acquire, purchase or subscribe for any securities of the Company.

NIU HOLDINGS LIMITED

(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 8619)

SUPPLEMENTAL ANNOUNCEMENT – FURTHER REVISED EXPECTED TIMETABLE IN RELATION TO

(I) PROPOSED RIGHTS ISSUE ON THE BASIS OF TWO (2) RIGHTS SHARES FOR EVERY ONE (1) SHARE HELD AT THE CLOSE OF BUSINESS ON THE RECORD DATE ON A NON-FULLY UNDERWRITTEN BASIS; AND (II) CONNECTED TRANSACTION IN RELATION TO THE UNDERWRITING AGREEMENT

Placing Agent to the Rights Issue

First Shanghai Securities Limited

Independent Financial Adviser to the Independent Board Committee and the Independent Shareholders

Nuada Limited

References are made to the announcements (the “Announcements”) of NIU Holdings Limited (the “Company”) dated 11 February 2026, 16 March 2026, 31 March 2026, 20 April 2026, 21 April 2026 and 22 April 2026 in relation to the Rights Issue on the basis of two (2) Rights Share for every one (1) Share held on the Record Date, and also the announcement dated 20 April 2026 and 23 April 2026 in relation to the adjournment of the EGM (the “Further Adjourned EGM”). Unless otherwise specified, capitalised terms used in this announcement shall have the same meanings as those defined in the Announcements.

As the Further Adjourned EGM, the expected timetable for the Rights Issue as set out in the Announcements is subject to change.

REVISED TIMETABLE

The expected revised timetable for the Rights Issue is set out below:

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Events
Hong Kong Time and Date

Commencement of dealings in fully-paid Rights Shares... 9:00 a.m. on Wednesday, 8 July 2026

Payment of Net Gain to relevant No
Action Shareholders and Non-Qualifying
Shareholders and net proceeds from sale
of nil-paid Rights Shares to the relevant
Non-Qualifying Shareholders (if any)... Monday, 13 July 2026

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All time and dates specified above in the expected timetable or in other parts of this announcement refer to Hong Kong local times and dates and are indicative only and may be extended or varied by the Company. If there is any change to the above expected timetable, announcement(s) will be made by the Company as and when appropriate.

WARNING OF THE RISKS OF DEALING IN SHARES AND THE NIL-PAID RIGHTS SHARES

Shareholders and potential investors of the Company should note that the Rights Issue is conditional upon, among other things, the Underwriting Agreement having become unconditional and the Underwriter not having terminated the Underwriting Agreement in accordance with the terms thereof, and the Listing Committee granting the listing of, and permission to deal in, the Rights Shares in their nil-paid and fully-paid forms. Please refer to the section headed "Conditions of the Rights Issue" in the Announcement for further details. Shareholders and potential investors of the Company should note that if the conditions to the Rights Issue are not fulfilled, the Rights Issue will not proceed.

Shareholders and potential investors of the Company are advised to exercise caution when dealing in the securities of the Company. Any person who is in any doubt about his/her/its position or any action to be taken is recommended to consult his/her/its own professional adviser(s).

Any dealings in the Shares from the date of this announcement up to the date on which all the conditions of the Rights Issue are fulfilled, and any Shareholders dealing in the Rights Shares in nil paid form will accordingly bear the risk that the Rights Issue may not become unconditional or may not proceed. Any Shareholders or other persons contemplating any dealings in the Shares and/or Rights Shares in nil-paid form are recommended to consult their professional advisers.

By order of the Board

NIU Holdings Limited

Mr. Ng Chun Chung

Company Secretary

Hong Kong, 23 April 2026

As at the date of this announcement, the Board comprises, Ms. LEUNG Suet Yiu and Mr. LEUNG Chun Yu Edmund as executive Director; Mr. YUEN Chi Ping and Dr. CHAN Yin Nin as non-executive Directors; and Ms. LUNG Wing Yee, Mr. LEUNG Man Chun and Mr. WONG Chun Man as independent non-executive Directors.

This announcement, for which the Directors collectively and individually accept full responsibility, includes particulars given in compliance with the GEM Listing Rules for the purpose of giving information with regard to the Company. The Directors, having made all reasonable enquiries, confirm that to the best of their knowledge and belief, the information contained in this announcement is accurate and complete in all material

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respects and not misleading or deceptive, and there are no other matters the omission of which would make any statement herein or this announcement misleading.

This announcement will remain on the “Latest Listed Company Information” page of the Stock Exchange website at http://www.hkexnews.hk for at least seven days from the date of its publication and the Company’s website at http://www.niuholdings.com.hk.

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