YANKEY — AGM Information 2026

Apr 24, 2026

YKE

Yankey Engineering Co., Ltd.
Notice of 2026 Annual Shareholders’ Meeting

(Summary Translation - In case of any discrepancy between the Chinese and English versions, the Chinese version shall be prevailed.)

I. Information of the meeting

The 2026 Annual Shareholders’ Meeting (the Meeting) of Yankey Engineering Co., Ltd. (the Company) will be convened at 10:00 a.m., Wednesday, May 27, 2026 at 20F, No. 266, Sec. 1, Wenhua 2nd Rd., Linkou Dist., New Taipei City, Taiwan. Shareholder registration time starts at 09:30 am, the location is the same as where meeting will be convened.

Meeting Agenda:

1. Matters to Report
   (1) 2025 Business Report
   (2) 2025 Audit Committee’s Report
   (3) Report of Distribution of Employee and Director Remuneration for 2025
   (4) Report of the calculation and recognition of manager and employee performance bonuses for 2025
   (5) The distribution of cash dividends for earnings

2. Matters for Acknowledge
   (1) 2025 Business Report and Financial Statements
   (2) 2025 Earning Distribution

3. Matters for Discussion
   (1) Proposal to revise the Articles of Incorporation
   (2) Proposal of issuance of new shares from capital increase out of earning

4. Extempore Motions

II. Propose by the Board of Directors: 2025 earnings distribution

1. Cash dividends: issuance of NT$ 2,532,541,389 (NT$21 per share).
2. Stock dividends: issuance of NT$ 120,597,210 from capital increase to issue 12,059,721 new shares, with 100 new shares issued free of charge for every 1,000 existing shares.
3. After approval by the shareholders' meeting and by the competent authority, the shareholders' meeting will be requested to authorize the Board of Directors to establish the record date for capital increase and dividend distribution.
4. The new shares issued this time from capital increase, will have the same rights and obligations as the outstanding common shares. If, subsequent to the aforementioned

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YKE

resolution, the shareholders' stock dividend ratio and/or cash dividend distribution ratio are subject to change due to the impact from the Company's number of outstanding shares resulting from the repurchase of the Company's treasury shares, the transfer of treasury shares to employees, or the cancellation of such treasury shares, it is proposed that the Shareholders' Meeting authorize the Chairman to make adjustments to the stock dividend and cash dividend distribution ratios based on the actual number of outstanding shares, at his/her sole discretion.

III. If the reasons for convening this Shareholders' Meeting include proposals, essential contents of items specified under Article 172 of the Company Act, please refer to the website of Market Observation Post System (MOPS) at (http://mops.twse.com.tw), select English>Electronic Books> Enter Stock Code (6691) and Year (2026)>Select appropriate document to view

IV. In accordance with Article 165 of the Company Act, March 29, 2026 to May 27, 2026, is the share transfer prohibition period.

V. Please find the Sign-in Card and Proxy Form enclosed with this notice. If you plan to attend the Meeting in person, please affix your signature or seal to the Sign-in Card (no need to mail it back), simply submit in person on the day of the Meeting. If you wish to appoint a proxy to attend the Meeting, please fill out the name and relevant information of the proxy, affix your signature or seal to the Proxy Form. Such the Proxy Form shall be delivered to the Company's stock registrar and transfer agent, SinoPac Securities Corporation - Register & Transfer Agency Department, at least five (5) days prior to the Meeting so that a Sign-in Card can be issued to the Proxy.

VI. Shareholders, solicitors and entrusted agents should bring identity verification when attending the Shareholders' Meeting

VII. If a proxy is solicited by the shareholder(s), the Company is required to compile details on the proxy solicitation parties and disclose such information on the Securities & Futures Institute (SFI) website at (https://free.sfi.org.tw) no later than April 24, 2026. Shareholder(s) can obtain information on the "Free Proxy Disclosure & Related Information System".

VIII. The Shareholder Voting Right may be exercised electronically from April 25, 2026 to May 24, 2026. Please login online at Taiwan Depository & Clearing Corporation (TDCC) Shareholder's eService platform>eVoting website to exercise voting rights in accordance with the online instruction (https://stockservices.tdcc.com.tw/evote/index.html?language=EN).

IX. The Register & Transfer Agency Department of SinoPac Securities Corporation is the proxy tallying and verification institution for this Annual Shareholders' Meeting.

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YKE

X. These regulations should be abided and applied.

Sincerely Yours,

Board of Directors

Yankey Engineering Co., Ltd.