HMC — Proxy Solicitation & Information Statement 2026

Apr 24, 2026

Meeting Notice
of
Annual General Shareholders' Meeting
(Summary Translation)
(Stock Code:4576)

The 2026 Annual General Shareholders' Meeting (the "Meeting") of Hiwin Mikrosystem Corp. (the "Company") will be convened at Howard Prince Hotel Taichung, Conference Room, (Address: 4F., No. 129, Anhe Rd., Xitun Dist., Taichung City 407, Taiwan) at 9:00 a.m., Tuesday, May 26, 2026.

i. The agenda for the Meeting is as follows:

(1) Matters to Report:
1. 2025 Business Report
2. Audit Committee’s Report on the 2025 Financial Report Reviews
3. Report on Distribution of 2025 Employees' and Directors' Renumeration
4. Report on 2025 Earnings Distribution as Cash Dividends

(2) Matters for Ratification:
1. Ratification of the 2025 Business Report and Financial Statements
2. Ratification of Proposal for Distribution of 2025 Earnings

(3) Matters for Discussion:
Proposal of Releasing the Prohibition on Directors and Their Representatives from Participation in Competitive Business

(4) Extempore Motions

ii. The proposal for distribution of 2025 earnings adopted at the meeting of the Board of Directors is as follows: Each common share holder will be entitled to receive a cash dividend of NT$0.80 per share. Totaling NTD$95,841,478.

iii. It is proposed, according to Article 209 of the Company Act, this general meeting of shareholders is to be requested to lift the non-competition restrictions on the directors and their representatives. For details on the non-competition clauses, please refer to the shareholders' meeting manual.

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iv. One copy of the attendance notification form and proxy form are attached to this meeting notice. If the shareholder(s) is attending the meeting in person, please sign or stamp on the attendance notification form and submit it to the check-in desk on the day of the meeting. If an agent is entrusted to attend the meeting, the shareholder shall sign or stamp on the proxy form and personally fill out the name and address of the agent, then deliver the proxy form to Registrar and Transfer Agency Department of Yuanta Securities Corporation at least 5 days prior to the day of the meeting so that the attendance card can be sent to the agent accordingly.

v. The Registrar and Transfer Agency Department of Yuanta Securities Corporation is the proxy tallying and verification institution for this Meeting.

vi. If a proxy is solicited by the shareholder(s), Company is required to compile a summary statement of the Solicitor Solicitation Information and disclose such information on the Securities & Futures Institute (SFI) website no later than April 24, 2026. Shareholder(s) can obtain information on the “Free proxy disclosure & related information system” (https://free.sfi.org.tw).

vii. If there are matters stipulated in Article 172 of the Company Act, except for the convening notice, the main contents of the meeting please refer to MOPS (https://mops.twse.com.tw).

viii. Shareholders may exercise their voting rights through STOCKVOTE platform of Taiwan Depository & Clearing Corporation (https://www.stockvote.com.tw) during the period from April 26 to May 23, 2026.

Sincerely,

Board of Directors

Hiwin Mikrosystem Corp.