Niche-Tech Semiconductor Materials Limited — Proxy Solicitation & Information Statement 2026

May 15, 2026

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.

Niche-Tech Semiconductor Materials Limited

駿碼半導體材料有限公司

(incorporated in the Cayman Islands with limited liability)

(Stock Code: 8490)

SUPPLEMENTAL ANNOUNCEMENT TO THE AGM CIRCULAR

Reference is made to the circular (the "AGM Circular") and notice of annual general meeting (the "AGM") of Niche-Tech Semiconductor Materials Limited (the "Company") dated 8 May 2026. Unless otherwise defined, capitalised terms used in this announcement shall have the same meanings as defined in the AGM Circular.

The Company would like to provide the following supplemental information regarding the AGM Circular.

RE-APPOINTMENT OF AUDITOR

Gary Cheng CPA Limited (the "Auditor") will retire as the auditors of the Company at the AGM and, being eligible, offer themselves for re-appointment. The re-appointment of the auditors of the Company has been reviewed by the audit committee of the Company which made recommendation to the Board that the re-appointment be submitted and proposed for Shareholders' approval at the AGM.

The estimated audit fee provided by the Auditor for the audit services to the Company for the year ending 31 December 2026 is estimated to be approximately in the range of HK$950,000 to HK$1,200,000 (exclusive of out-of-pocket expenses). Such estimated audit fee has been formulated considering factors such as the complexity and business plan of the Company, the expected business development plans for the upcoming year, the anticipated audit scope, audit timetable, and the resources required by the Auditor for the year ending 31 December 2026, as compared with the audit work performed on the Company's consolidated financial statements for the year ended 31 December 2025. This range is subject to adjustment should there be any subsequent changes, developments, or modifications to the basis or assumptions.

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The above supplemental information does not affect other information contained in the AGM Circular and save as disclosed above, all other information therein remains unchanged.

By Order of the Board
Niche-Tech Semiconductor Materials Limited
Chow Bok Hin Felix
Executive Chairman and Executive Director

Hong Kong, 15 May 2026

As at the date of this announcement, the executive Directors are Dr. Chow Bok Hin Felix, Professor Chow Chun Kay Stephen and Mr. Shi Yiwu, the non-executive Directors are Mr. Li Chiu Fan and Mrs. Chow Fung Wai Lan Rita, and the independent non-executive Directors are Professor Ng Wang Wai Charles, Mr. Tai Chun Kit and Mr. Poon Lai Yin Michael.

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 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 Stock Exchange of Hong Kong's website at www.hkexnews.hk on the "Latest Listed Company Information" page for a minimum period of seven days from the date of its publication. This announcement will also be published on the Company's website at www.nichetech.com.hk.

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