Quintain Steel — Proxy Solicitation & Information Statement 2026

Apr 17, 2026

官

Notice of 2026 Annual General Shareholders' Meeting

(Summary Translation¹)

1. The 2026 Annual General Shareholders' Meeting is determined to be held at 10:00 am, May 21 (Wednesday), 2026 (admission starts from 9:30 am at the same place as meeting), at No. 47, Xinjian Rd., South Dist., Tainan City (Hotel Château Anping).

Meeting Agenda:

I. Reported matters:

(1) 2025 Business Report and Financial Statement.
(2) Audit Committee's Review Report on the 2025 Financial Statement.
(3) Report on Endorsements/Guarantees for Others and Loans of Funds to Others in 2025.
(4) Report on Employees' Compensation and Directors' Remuneration in 2025.
(5) Report on the remuneration to directors in 2025.
(6) Other Report Items.

II. Acknowledged matters:

(1) Adoption of the 2025 Business Report and Financial Statements.
(2) Adoption of the 2025 loss off-setting proposal.

III. Discussion matters:

(1) Amendment to the Procedures for Acquisition or Disposal of Assets.

IV. Extemporary motions.

1. In accordance with Article 165 of the Company Act, the transfer of shares is hereby suspended from March 23, 2026 to May 21, 2026.

2. In addition to this announcement, a special letter is being sent to you, accompanied by one attendance registration card and one proxy form for the upcoming regular shareholders' meeting. We look forward to your kind attendance. If you plan to attend in person, please fill out the first part of the attendance registration card and bring it to the venue on the day of the meeting for registration. If you are appointing a proxy, please fill out both the second part of the proxy form and the first part of the attendance registration card, fold them together, and mail them back. These should be delivered to the Shareholder Services Department of President Securities Corporation, our shareholder services agent, at least 5 days before the meeting. After verifying the information, the completed attendance registration card will be sent to your proxy to be used for admission to the shareholders' meeting. Shareholders, solicitors, trustees, and appointed representatives attending

¹ Disclaimer: This English translation is prepared in accordance with the Chinese version and is for reference purposes only. If there are any inconsistency between the Chinese original and this translation, the Chinese version shall prevail.

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the meeting must carry the original of an official identification document with a photo for verification; in the case of a corporate representative, an assignment letter stamped with the corporate seal must also be presented.

1. If a shareholder solicits the proxies, the Company will prepare a summary form of solicitor solicitation information and disclose it on the website of the Securities and Exchange Commission (Website: https://free.sfi.org.tw) before April 20, 2026. Should investors wish to make an enquiry, you can go directly to the 'Free Enquiry System for Proxy Forms' by typing in your enquiry criteria.

2. Shareholders may exercise their voting rights electronically at the Annual General Shareholders' Meeting from April 21, 2026 to May 18, 2026 by accessing the "Shareholder e-Voting System" website of Taiwan Depository and Clearing Corporation and following the relevant instructions. (Website: https://www.stockvote.com.tw)

3. The institution conducting statistics and verification for the proxies for the Company's shareholders' meetings, is Shareholder Affairs Agency Department, President Securities Corporation.

4. If there are any matters that should be listed and described in the main content of the convening as described under Section 172 of the Company Act, please access the website of the Market Observation Post System (https://mops.twse.com.tw): Please click on Basic Information / Electronic Books / Financial Reports and Shareholders' Meetings, enter the Company's stock code "2017" and the year "2026" and select "Reference to Motions" or "Supplementary Information for Handbooks and Meetings."

5. Please take action accordingly.

Respectfully,

Board of Directors, Quintain Steel Co., Ltd.

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Notes of Using the POA Form

1. Before giving the POA to any solicitor, shareholders shall request the written information and information of the advertisement content from the solicitor, or review such information from the consolidated list provided by the Company. Shareholders shall fully understand the background of the solicitor and his/her/its preferred candidate, and their opinions to various proposals to be raised in the meeting.

2. If the delegated representative is not a shareholder, please fill in your ID number or Uniform Number at the Account Number of the Shareholder.

3. If the solicitor is a trust, stock affair agency, please fill in your Uniform Number at the Account Number of the Shareholder.

4. Other natures of the proposal are listed according to this regulation.

5. After the POA is sent to the Company, if the shareholder decides to attend the meeting in person, or exercise the right of vote electronically, he/she shall withdraw the POA with a written notice to the Company no later than two days before the meeting. Any withdrawal later than this deadline, the right of vote exercised by the attending representative shall prevail.

6. The format of proxy is as Slip 2.

Note. No souvenirs will be distributed at this AGM.

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Aggregate List of the Solicitors for 2026 AGM of Quintain Steel Co., Ltd.
Date of AGM: May 21, 2026

No.	Solicitor	Principal	Name of the solicitation locations, or the name of the delegates appointed to handle the solicitation
1	President Securities Corp.	Baulidu Investment Co., Ltd.	Stock Affairs Agency Department, President Securities Corp.
Phone: (02)2746-3797
Address: Basement 1st Level, No. 8, Dongxing Rd., Songshan District, Taipei City
[Only soliciting 1,000 shares (inclusive) or more]

Note:
(1) The above information is a summary. Shareholders who need to consult detailed information should refer to the announcement date newspaper or the Securities and Futures Institute website (http://free.sfi.org.tw/) listed on this meeting notice.
(2) According to Article 6, Paragraph 1 of the proxy rules, shareholders who appoint a trust enterprise or shareholder services agency as solicitor must fill in the name or title of the appointing shareholder.