Supreme — AGM Information 2026

Apr 23, 2026

SUPREME ELECTRONICS CO., LTD.

Notice of 2026 Annual General Meeting of Shareholders

I. The 2026 Annual General Meeting of Shareholders will be held at 9:00 a.m. on May 26, 2026 (Tuesday) at 2nd Floor, No. 335, Ruiguang Rd., Neihu District, Taipei City (Hon Hui Rui Guang Plaza). Registration for attendance will begin at 8:30 a.m. at the same location as the meeting venue.

Meeting Agenda:

(I) Reports:

1. 2025 Business Report.
2. 2025 Audit Committee’s Review Report.
3. To report the distribution status of 2025 directors’ remuneration and employees’ remuneration, presented for acknowledgment.
4. To report the distribution status of 2025 cash dividends from earnings, presented for acknowledgment.
5. Report on the amendments to certain provisions of the “Ethical Corporate Management Best Practice Principles” and the “Procedures for Ethical Management and Guidelines for Conduct”.

(II) Ratification:

1. Adoption of the 2025 Business Report and Financial Statement.
2. Adoption of the 2025 Earnings Distribution Proposal.

(III) Extraordinary motions.

(IV) Adjournment

II. For a description of the main contents of the motions required to be listed in accordance with Article 172 of the Company Act, please visit the Market Observation Post System (MOPS) website (https://mops.twse.com.tw), select “Company” → “Electronic Filing” → “Annual Reports and Shareholders’ Meeting Related Information,” and enter the Company’s stock code (or name) and the relevant year to search for the “Reference Materials for Shareholders’ Meeting Agenda Items” or the “Meeting Handbook and Supplementary Materials.”

III. The Board of Directors has resolved as follows, (I) Set aside NT$1,985,000,000 for the distribution of cash dividends to common shareholders of NT$3.80055821 per share, (II) Set aside NT$60,750,000 for the distribution of the Preferred A Shares dividend of NT$2.025 per share, (III) The Preferred A Shares dividend and the cash dividends to common shareholders are calculated up to the dollar level and the amount under dollar level would be rounded down and recognized by the Company as other income, (IV) The

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Chairman is authorized to determine the record date, payment date, and other related matters for the Distribution.

IV. Pursuant to Article 165 of the Company Act, the registration of share transfers will be suspended from March 28, 2026 to May 26, 2026.

V. In addition to the public announcement, this notice is hereby sent to you, together with one copy each of the attendance sign-in card and proxy form for the shareholders’ meeting. We respectfully invite you to review the enclosed documents and attend the meeting.

If you intend to attend in person, please complete the second copy of the attendance sign-in card, affix your seal or signature, and present it directly at the meeting venue on the day of the meeting; there is no need to return it by mail.

If you appoint a proxy, please complete the second copy of the proxy form, affix your seal or signature, and deliver it to the Company’s shareholder services agent, the Registrar Agency Department of Capital Securities Corporation, at least five (5) days prior to the meeting date. The shareholder services agent will then prepare the attendance sign-in card and forward it to your proxy for attendance at the shareholders’ meeting.

VI. If any shareholder solicits proxies, the Company will prepare a summary of the proxy solicitation information and disclose it on the website of the Securities and Futures Institute by April 24, 2026. Investors may access the “Free Proxy Solicitation Information Inquiry System” (https://free.sfi.org.tw) and make inquiries by entering the required search criteria.

VII. The institution responsible for the tallying and verification of proxy forms for the Meeting is the Registrar Agency Department of Capital Securities Corporation.

VIII. Shareholders may exercise their voting rights at the Meeting by electronic means from April 25 to May 23, 2026. Please visit the “Shareholder e-Services” website of the Taiwan Depository & Clearing Corporation (https://stockservices.tdcc.com.tw) and follow the relevant instructions to cast your vote.

IX. In accordance with the Articles of Incorporation of the Company and the rights and obligations of Series A Preferred Shares, holders of such shares are not entitled to vote at the Company’s shareholders’ meetings, except at preferred shareholders’ meetings or with respect to proposals that may adversely affect their rights and obligations. Accordingly, holders of Series A Preferred Shares are not entitled to vote on the proposals at this shareholders’ meeting and will not receive any shareholders’ meeting souvenirs.

X. The shareholders’ meeting will be broadcast live online from 9:00 a.m. Please visit the Company’s website (Path: Investors / Shareholders’ Area / Shareholders’ Meeting; URL: https://www.supreme.com.tw/WP/WP0054.aspx) and click the link to watch the live broadcast of the 2026 Annual General Meeting.

Respectfully,

Board of Directors, Supreme Electronics Co

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