Giant Manufacturing Co., Ltd. — Proxy Solicitation & Information Statement 2026

May 18, 2026

Giant Manufacturing Co., Ltd.
Meeting Notice for Annual Meeting
(Summary Translation)

The 2026 Annual General Meeting (the “Meeting”) of Giant Manufacturing Co., Ltd. (the “Company”) will be convened at 9:00 A.M., Thursday, June 18, 2026 at No.999, Sec. 1, Dong-Da Rd., Xitun Dist., Taichung City, Taiwan.

1. The agenda for the Meeting is as follows:

I. Report Items
1. Business report for 2025.
2. Audit Committee’s review report.
3. Appropriation of remuneration to directors and compensation to employees in 2025.

II. Ratification Items
1. 2025 financial statements.
2. Distribution of 2025 earnings.

III. Discussion Items
1. To amend the Articles of Incorporation.

IV. Extempore Motions

1. The distribution of 2025 earnings has been approved by resolution of the Board Meeting. It is expected to distribute cash dividends of NT$1.8 per share.

2. If there are any matters related to the convening as stipulated in Article 172 of the Company Act for this shareholders' meeting, please visit the Market Observation Post System (https://mops.twse.com.tw). Select "Single Company" under the "Electronic Document Download" section, and then choose "Annual Reports and Shareholders' Meeting Related Information." Enter the company code (or abbreviation) and the year, and then select "Agenda Handbook and Meeting Supplementary Materials" or "Reference Materials for Shareholders' Meeting Proposals" to access the information.

3. The entries in the shareholders’ registration book for share transfer shall be suspended from April 20, 2026 to June 18, 2026.

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1. Besides the notice published on TWSE MOPS, a paper notice is separately offered with an attendance card and a Letter of Authorization, one for each. Please be notified and take the time to participate. If shareholders would participate in person, please fill in the third part of the attendance card (no need to mail back) and bring it along to the meeting on the day of the event. If shareholders would appoint an proxy to participate, please fill in the fourth part of the Letter of Authorization, fold and mail back all parts to the stock-agency department of Grand Fortune Securities Co., Ltd., the stock agency of the company. The Letter of Authorization must be received at least 5 days before the meeting. After the information has been verified, an attendance card will be issued and sent to the appointed proxy for attending the shareholders' meeting. If the appointed proxy has not received the attendance card by the day before the meeting, please bring identification documents to the venue on the day of the meeting to process attendance registration.

2. For proxy solicitation, the company shall upload the summary to Securities & Futures Institute (website: https://free.sfi.org.tw/) before May 18, 2026 under the law requirement. Please input Stock Code/Company Name for enquiry.

3. Shareholders may exercise their voting rights electronically through the Taiwan Depository & Clearing Corporation’s “Stock e-services” platform (http://www.stockservices.tdcc.com.tw) during the period from May 19, 2026 to June 15, 2026. Please select “eVoting” and follow the relevant instructions to cast your vote.

4. The stock-agency department of Grand Fortune Securities Co., Ltd., is appointed as the shareholder letter authorization statistics and verification proxy of this meeting.

5. Please be notified and take actions accordingly.

Board of Directors
Giant Manufacturing Co., Ltd.