Taiwan Business Bank — Proxy Solicitation & Information Statement 2026

Taiwan Business Bank
Notice of 2026 Annual Shareholders’ Meeting

I. The 2026 Annual Shareholders’ Meeting (the “Meeting”) of Taiwan Business Bank (the “Bank”) will be held at 9:00 a.m. on June 18, 2026 (Thursday) at 17F, Tacheng St., Datong Dist., Taipei City. Shareholder registration will begin at 8:25 a.m. at the shareholders' meeting venue. The agenda for the Meeting is as follows:

1. Bank Reports:
   (1) The Bank’s 2025 Operating Report.
   (2) The Audit Committee’s Review Report on the 2025 financial statements of the Bank.
   (3) Report on the distribution of remunerations for employees and directors of the Bank in 2025.
   (4) Advocate relevant regulations governing the same person or same concerned party holding the Bank’s outstanding voting shares over a particular ratio.

2. Proposals:
   (1) Adoption of the 2025 Operating Report and financial statements of the Bank.
   (2) Adoption of the 2025 earnings distribution from the final accounts of the Bank.

3. Discussion
   (1) Resolution to carry out a capital increase via transferred earnings in accordance with the earnings distribution of stock dividends for 2025.
   (2) Amendments to the Procedures for Acquisition or Disposal of Assets of the Bank.
   (3) Amendments to the Rules of Procedures for Shareholders’ Meetings of the Bank.
   (4) Amendments to the Rules for Election of Directors of the Bank.

4. Questions and Motions

II. Main contents of dividend distribution:
1. Cash dividend: NT$2,915,418,555, with a distribution of NT$0.3 per share.
2. Stock dividend: NT$6,802,643,300, with a distribution of NT$0.7 per share (i.e., 70 shares for every thousand shares).

III. Enclosed please find the attendance card and the proxy form. If you decide to attend in person, please sign or seal the attendance card and bring it to the venue on the day of the Meeting. If you delegate a proxy to attend, please sign or seal the proxy form, personally fill in the name and address of the proxy, and deliver it by mail or in person to the Bank’s stock registration agent, the Registrar & Transfer Agency Department of Yuanta Securities Co., Ltd. (B1, No. 67, Sec. 2, Dunhua S. Rd., Da'an Dist., Taipei, 106045), five days prior to the date of the Meeting, so as to facilitate the mailing of the attendance

card to the appointed proxy. Proxy agents who intend to participate virtually shall fill out the "Letter of Intent for Appointed Proxy Registration to Participate in the Virtual Shareholders' Meeting" and deliver it to the Bank's stock registration agent, the Registrar & Transfer Agency Department of Yuanta Securities Co., Ltd., for registration and enrollment before 4:00 p.m. on June 15, 2026.

IV. The Registrar & Transfer Agency Department of Yuanta Securities Co., Ltd. has been appointed by the Bank as the agent for proxies tallying and verification.

V. For any shareholder who intends to solicit proxy forms from other shareholders, the Bank will consolidate the solicitors' information and disclose such information on the Securities & Futures Institute’s website on May 18, 2026. For further details regarding the proxy form inquiry procedure, please visit the website: https://free.sfi.org.tw and enter search criteria in the Proxy Information Free Search System.

VI. In addition to those listed on the meeting notice as prescribed by Article 172 of the Company Act, main contents of this Meeting will be disclosed on the Market Observation Post System’s website (https://mops.twse.com.tw). Please visit the MOPS website and click on “Single company / Electronic document download / Annual report and shareholders' meeting related information / Annual report and shareholders' meeting related information (including depository receipts)”. Enter the search criteria (Stock code or Year) to retrieve information for shareholders' meeting proposals (or the Meeting Handbook and supplementary materials).

VII. For this Shareholders’ Meeting, shareholders may exercise their voting rights by electronic means from May 19, 2026 to June 15, 2026. Please login directly to the Electronic Voting Platform on the website of Taiwan Depository and Clearing Corporation (https://stockservices.tdcc.com.tw), and vote according to the relevant instructions.

The Board of Directors
Taiwan Business Bank