昇佳電子 — Proxy Solicitation & Information Statement 2026

Sensortek Technology Corporation
2026 Annual Shareholders’ Meeting Notice
(Summary Translation)

The 2026 Annual Shareholders’ Meeting (the “Meeting”) of Sensortek Technology Corporation (the “Company”) will be convened at 9:00 a.m., Tuesday, May 26, 2026 at Multi-functional Conference Room, Tai Yuen Hi-Tech Industrial Park Phase III (located at 2F., No. 3, Taiyuan 1st Street, Zhubei City, Hsinchu County).

1. The agenda for the Meeting is as follows:

I. Report Items
(1) To report the Business of 2025.
(2) 2025 Audit Committee's Review Report.
(3) To report 2025 employees’ compensation and remuneration to directors.
(4) To report 2025 cash dividends distribution.

II. Matters for Ratification
(1) To approve 2025 Financial Statements and Business Report.
(2) To approve the proposal for distribution of 2025 profits.

III. Proposed Resolutions
To release the directors (including independent directors) and their representatives from non-competition restrictions.

IV. Extemporary Motions

1. Report on the Distribution of Cash Dividend for 2025 adopted at the meeting of the Board of Directors is as follows: cash dividends of NT$5.5 per share.

2. Where the subject of the shareholders' meeting to be convened includes any contents that shall be explained in accordance with Article 172 of the Company Act or Article 26-1 of the Securities and Exchange Act, such contents shall be included in the meeting notice, please visit the Market Observation Post System (website: https://mops.twse.com.tw).

1. According to Article 165 of the Company Act, the book closure period for ordinary shares starts from March 28, 2026 to May 26, 2026. Please contact the Stock Transfer Agency of Taishin Securities Co., Ltd. to open an account (requires chop specimen card).

2. Regarding the solicitation of proxy forms, the Company will compile a summary of information on solicitors and disclose it on the website of the Securities & Futures Institute on April 24, 2026. Investors may inquire about relevant information at the “Proxy Form Inquiry” (website: https://free.sfi.org.tw). The Company has appointed the Stock Transfer Agency of Taishin Securities Co., Ltd. to tally and verify the proxy forms collected for this shareholders' meeting.

3. In addition to the announcement on the MOPS, the Company is sending out meeting notices to each shareholder. Enclosed please find the sign-in card and the proxy form. If you wish to attend the meeting in person, please sign or seal the sign-in card on slip 3 and present it at the registration desk at the meeting venue on the day of the meeting (please do not mail it back to the Company); if you wish to attend the meeting by proxy, please fill in the information of the proxy, sign or seal the proxy form, and mail or deliver it to the Company's shareholder services agent, Stock Transfer Agency of Taishin Securities Co., Ltd., at least five days before the shareholders' meeting.

4. Shareholders may exercise their voting rights through the STOCKVOTE platform of Taiwan Depository & Clearing Corporation (website: https://stockservices.tdcc.com.tw) during the period from April 25, 2026 to May 23, 2026.

5. Please bring the identification card for verification when attending the meeting.

6. Please bring to your attention as informed.

Board of Directors
Sensortek Technology Corporation