MDS — Proxy Solicitation & Information Statement 2026

May 20, 2026

MERCURIES DATA SYSTEMS LTD.
Notice of 2026 Annual Shareholders' Meeting
(Summary Translation)

I. The 2026 Annual Shareholders' Meeting (the "Meeting") of MERCURIES DATA SYSTEMS LTD. (the "Company") will be held at B2, No.2, Lane 150, Sec.5, Sin-Yi Rd., Taipei, at 9:00 a.m., June 9, 2026. The shareholders' registration will begin at 8:30 a.m., and the place of registration is the same as the meeting location.

The agenda for the Meeting is as follows:

1. Report Items
   (1) 2025 Business Report
   (2) Audit Committee's Review Report on the 2025 Financial Statements
   (3) Report on the compensation for employees and directors in 2025.
   (4) Report on the implementation status of the Company's 1st Domestic Unsecured Convertible Bonds.

2. Ratification Items
   (1) Ratification of the 2025 Business Report and Financial Statements
   (2) Ratification of the Company's 2025 Earnings Distribution Proposal

3. Discussion Items
   (1) Discussion of the amendments to the "Articles of Incorporation"
   (2) Discussion of the amendments to the "Procedures for Acquisition or Disposal of Assets"

4. Election Item
   By-election of One Independent Director

5. Other Proposal
   Proposal of release the non-competition restrictions on directors and their representatives

6. Extemporary Motions

7. Adjournment

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II. The proposal for distribution of 2025 earnings has been approved by the Board of Directors as follows:

Cash dividends: A total of NT$138,599,700, representing NT$0.70 per share.

III. One independent director will be by-elected at the Annual Shareholders' Meeting. The nominated candidate is listed as follows:

Independent director:

(1) Kuo, Ya-Hui

IV. Voting rights may be exercised by electronic means during the period from May 10, 2026 through June 6, 2026. Please log in to the "Shareholders Voting by Electronic Means" homepage established by Taiwan Depository & Clearing Corporation at https://www.stockvote.com.tw.

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Board of Directors
MERCURIES DATA SYSTEMS LTD.