Announcements

1.Date of occurrence of the event:2026/06/10 2.Company name:Taiwan Business Bank, Co., Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):head office 4.Reciprocal shareholding ratios:N/A 5.Cause of occurrence:The Board of Directors of Taiwan Business Bank, Co., Ltd. has resolved to participate in the National Development Council's “Promotion Plan for the Credit Guarantee Mechanism for Enterprises Investing in the United States”, with an initial funding tranche of USD 25 million. 6.Countermeasures:N/A 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): (1)In coordination with government policies, Taiwan Business Bank, Co., Ltd. aims to capture investment opportunities for corporate investment in the United States and drive business growth. (2)Taiwan Business Bank, Co., Ltd. participates in the “Credit Guarantee Mechanism for Enterprises Investing in the United States” to obtain a credit guarantee quota, utilizing the mechanism to reduce credit risk. (3)The actual terms and conditions shall be subject to the formally executed agreement.

1.Date of occurrence of the event:2026/06/09 2.Company name:Taiwan Business Bank,Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):Head office 4.Reciprocal shareholding ratios:Na 5.Cause of occurrence:As Subject 6.Countermeasures:Na 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): In May,2026, the Bank reported the consolidated income before tax was NT $1,545 million, the consolidated income after tax was NT $1,286 million. The accumulated consolidated income before tax was NT $7,263 million, the accumulated consolidated income after tax was NT $5,923 million, the accumulated consolidated EPS before tax was NT$0.75, the accumulated consolidated EPS after tax was NT$0.61, consolidated book value per share was NT$15.92. Above figures are not audited or reviewed by CPA.

1.Date of submission to the board of directors or approval by the board of directors:2026/05/11 2.Date of approval by the audit committee:2026/05/04 3.Start and end dates of financial reports or annual self-assessed financial of the reporting period (XXXX/XX/XX~XXXX/XX/XX):2026/01/01~2026/03/31 4.Net interest revenue (expense) accumulated from 1/1 to end of the period (thousand NTD):5,508,330 5.Net revenue accumulated from 1/1 to end of the period (thousand NTD): 8,836,560 6.Profit (loss) before tax accumulated from 1/1 to end of the period (thousand NTD):4,324,660 7.Profit (loss) accumulated from 1/1 to end of the period (thousand NTD):3,437,983 8.Profit (loss) during the period attributable to owners of parent accumulated from 1/1 to end of the period (thousand NTD):3,437,983 9.Basic earnings (loss) per share accumulated from 1/1 to end of the period (NTD):0.35 10.Total assets end of the reporting period (thousand NTD):2,555,347,612 11.Total liabilities end of the reporting period (thousand NTD):2,406,237,987 12.Equity attributable to owners of parent end of the reporting period (thousand NTD):149,109,625 13.Any other matters that need to be specified:Na

1.Date of the board of directors resolution:2026/05/11 2.Name [issue no.__ of (secured, unsecured) corporate bonds of ___________ (company)]:Taiwan Business Bank Co., issue of subordinated financial debentures. 3.Whether to adopt shelf registration (Yes/No):No 4.Total amount issued:$NT 5 billion (or the equivalent in other currencies),which includes non-cumulative perpetual subordinated debts of $NT 2 billion and long-term subordinated debts of $NT 3 billion. 5.Face value per bond:To be determined. 6.Issue price:At 100% face value. 7.Issuance period:(1)No maturity date for non-cumulative perpetual subordinated debts. (2)No less than 5 years for long-term subordinated debts. 8.Coupon rate:Will be determined by market and funding of the bank conditions. 9.Types, names, monetary values and stipulations of collaterals:None. 10.Use of the funds raised by the offering and utilization plan: To enhance the financial structure and contribute to the Bank’s Capital Adequacy Ratio. 11.Underwriting method:To be determined. 12.Trustees of the corporate bonds:None. 13.Underwriter or agent:To be determined. 14.Guarantor(s) for the issuance:None. 15.Agent for payment of the principal and interest:To be determined. 16.Certifying institution:None. 17.Where convertible into shares, the rules for conversion:None. 18.Sell-back conditions:To be determined. 19.Buyback conditions:To be determined. 20.Reference date for any additional share exchange, stock swap, or subscription:None. 21.Possible dilution of equity in case of any additional share exchange, stock swap, or subscription:None. 22.Any other matters that need to be specified:None.

1.Date of occurrence of the event:2026/05/08 2.Company name:Taiwan Business Bank,Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):Head office 4.Reciprocal shareholding ratios:Na 5.Cause of occurrence:As Subject 6.Countermeasures:Na 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): In April,2026, the Bank reported the consolidated income before tax was NT $1,397 million, the consolidated income after tax was NT $1,201 million. The accumulated consolidated income before tax was NT $5,717 million, the accumulated consolidated income after tax was NT $4,637 million, the accumulated consolidated EPS before tax was NT$0.59, the accumulated consolidated EPS after tax was NT$0.48, consolidated book value per share was NT$15.63. Above figures are not audited or reviewed by CPA.

1.Date of institutional investor conference:2026/05/27 2.Time of institutional investor conference:14:00 3.Location of institutional investor conference:Webcast 4.Outline of institutional investor conference:Disclosure of Taiwan Business Bank's performance in 2026Q1, the conference will be conducted in Mandarin. 5.Any other matters that need to be specified:None.

1.Type of personnel changed (please enter: spokesperson, acting spokesperson, important personnel (CEO, COO, CMO, CSO, etc.) ,financial officer, accounting officer, corporate governance officer, chief information security officer, research and development officer, chief internal auditor, or designated and non-designated representatives): spokesperson、acting spokesperson 2.Date of occurrence of the change:2026/04/29 3.Name, title, and resume of the previous position holder: Spokesperson：Tseng-Hsiang Yi , Executive Vice President Acting spokesperson：Kuo-Liang Tseng , Executive Vice President 4.Name, title, and resume of the new position holder: Spokesperson：Kuo-Liang Tseng, Executive Vice President Acting spokesperson：Ying-Che Fang, Executive Vice President 5.Type of the change (please enter: ”resignation”, ”position adjustment”, ”retirement”, ”death”,”new replacement” or ”dismissal”):retirement 6.Reason for the change:retirement 7.Effective date:2026/05/01 8.Any other matters that need to be specified:None

1.Date of a notice of the board of directors meeting is issued:2026/04/29 2.Expected date of the board of directors meeting is convened:2026/05/11 3.Expected year and quarter of the financial reports or the annual self-assessed financial information submitted to the board of directors or approved by the board of directors:the First Quarter 2026 4.Any other matters that need to be specified:None

1.Date of the board of directors resolution:NA 2.Name [issue no.__ of (secured, unsecured) corporate bonds of ___________ (company)]:Taiwan Business Bank 1st Senior Unsecured Financial Debentures in 2026. 3.Whether to adopt shelf registration (Yes/No):No 4.Total amount issued:TWD 1 Billion. 5.Face value per bond:NT$10 milliion. 6.Issue price:Issue at 100% of principal amount. 7.Issuance period:The issuance term is 5 years. Issue date is May 14,2026; maturity date is May 14,2031. 8.Coupon rate:Fixed at rate 1.74% per annum. 9.Types, names, monetary values and stipulations of collaterals:N/A. 10.Use of the funds raised by the offering and utilization plan:To assist enterprises in the investment projects for environmental improvements and social benefits, etc. 11.Underwriting method:Utilize Sales Consultant. 12.Trustees of the corporate bonds:None. 13.Underwriter or agent:N/A. 14.Guarantor(s) for the issuance:None. 15.Agent for payment of the principal and interest:The Banking Department of Taiwan Business Bank. 16.Certifying institution:None. 17.Where convertible into shares, the rules for conversion:N/A. 18.Sell-back conditions:N/A. 19.Buyback conditions:N/A. 20.Reference date for any additional share exchange, stock swap, or subscription:N/A. 21.Possible dilution of equity in case of any additional share exchange, stock swap, or subscription:N/A. 22.Any other matters that need to be specified:None.

1.Date of the board of directors resolution:2026/04/15 2.Source of capital increase funds:Earnings of 2025 3.Whether to adopt shelf registration (Yes, please state issuance period/No): No 4.Total monetary value of the issuance and number of shares issued (shares issued not including those distributed to employees if consisting in capital increase from earnings or capital surplus):NT6,802,643,300 and 680,264,330 shares. 5.If adopting shelf registration, monetary value and number of shares to be issued this time:Na 6.The remaining monetary value and shares after this issuance when adopting shelf registration:Na 7.Par value per share:NTD10 8.Issue price:Na 9.Number of shares subscribed for by or allocated to employees:Na 10.Number of shares publicly sold:Na 11.Ratio of shares subscribed by or allotted as stock dividends to existing shareholders:70 shares will be distributed to each 1,000 shares in proportion to the shareholdings specified in the register of shareholders on the base date. 12.Handling method for fractional shares and shares unsubscripted for by the deadline:Shareholders may carry out the combination of fractional shares within 5 days from the base date at the Share Registrar. If the combination is not carried out within the aforementioned period, or if there are still fractional shares after the combination, cash will be distributed to the fractional shares instead (rounded down to dollar). The Chairman of the Board of Directors is authorized to contact a specific person to subscribe the aggregate fractional shares according to their par value. 13.Rights and obligations of these newly issued shares:The same as the original shares. 14.Utilization of the funds from the capital increase:In order to comply to new common stock capital requirements of BaselⅢ, and to enhance capital structures for the sake of profit earnings. 15.Any other matters that need to be specified:Na

1.Date of the board of directors resolution :2026/04/15 2.Year or quarter which dividends belong to:2025 3.Period which dividends belong to:2025 4.Appropriations of earnings in cash dividends to shareholders (NT$ per share):0.3 5.Cash distributed from legal reserve and capital surplus to shareholders (NT$ per share):0 6.Total amount of cash distributed to shareholders (NT$):2,915,418,555 7.Appropriations of earnings in stock dividends to shareholders (NT$ per share):0.7 8.Stock distributed from legal reserve and capital surplus to shareholders (NT$ per share):0 9.Total amount of stock distributed to shareholders (shares):680,264,330 10.Any other matters that need to be specified:none. 11.Par value of common stock:10

1.Date of occurrence of the event:2026/04/09 2.Company name:Taiwan Business Bank,Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):Head office 4.Reciprocal shareholding ratios:Na 5.Cause of occurrence:As Subject 6.Countermeasures:Na 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): In March,2026, the Bank reported the consolidated income before tax was NT $1,375 million, the consolidated income after tax was NT $1,113 million. The accumulated consolidated income before tax was NT $4,321 million, the accumulated consolidated income after tax was NT $3,435 million, the accumulated consolidated EPS before tax was NT$0.44, the accumulated consolidated EPS after tax was NT$0.35, consolidated book value per share was NT$15.34. Above figures are not audited or reviewed by CPA.

1.Date of the board of directors' resolution：2026/03/18 2.Shareholders meeting date：2026/06/18 3.Shareholders meeting location：17F, No.30, Ta Cheng St, Taipei, Taiwan R.O.C. 4.Shareholders' meeting will be held by means of (physical shareholders' meeting/ hybrid shareholders' meeting / virtual-only shareholders' meeting)：hybrid shareholders' meeting 5.Cause for convening the meeting (1)：Report item(s) (1)：2025 Business Report. (2)：2025 Statement and Records of Account examined by the Audit Committee. (3)：2025 Amounts and Payment of Employees' Compensation and Directors' Compensation. (4)：Awareness Promotion on Regulations Governing A Same Person or Same Concerned Party Holding the Issued Shares with Voting Rights over a Particular Ratio of TBB. 6.Cause for convening the meeting (2)：Ratification Item(s) (1)：2025 Business Report and Financial Statements. (2)：2025 Earnings Distribution. 7.Cause for convening the meeting (3)：Discussion Item(s) (1)：Proposal for the issuance of new shares for stock dividends. (2)：Amendment of "Procedures for Acquisition or Disposal of Assets of the Bank". (3)：Amendment of "The Rules of Procedure for Shareholders' Meetings". (4)：Amendment of "The Rules for Election of the Directors". 8.Extemporary Motions： 9.Book closure starting date：2026/04/20 10.Book closure ending date：2026/06/18 11.Any other matters that need to be specified：(1)The earning distribution for 2025 will be announced 40 days prior to the shareholders' meeting after the resolution of the Board of Directors. (2)A person or a group of related persons who singly, jointly or collectively holds more than 5% of total voting shares of Taiwan Business Bank(TBB) shall file to the Financial Supervisory Commission (FSC) for a record within 10 days after the date of acquisition; subsequently, the same filing proceedings are also required for every accumulated increase or decrease of holding by more than 1%; those who intend to hold singly, jointly or collectively more than 10%, 25% or 50% of total voting shares of TBB, are required to file for approval from the FSC prior to the holding. (Please refer to Articles 25 and 25-1 of the Banking Act for details.) (3)The shareholder could choose to log in TDCC website to vote, the period from 2026/05/19 to 2026/06/15. (website: https://www.stockvote.com.tw) (4)According to article 172-1 of Company Law, if any shareholder holding 1% or more of the total number of outstanding shares would like to propose in this general shareholders' meeting, TBB will receive such proposed proposition from 2026/03/28 to 2026/04/07(until 17:00). The address of proposition receiving office: 7F, No.30, Ta Cheng St, Taipei, Taiwan (Secretarial Dept, Taiwan Business Bank Co., Ltd.)

1.Date of occurrence of the event:2026/03/09 2.Company name:Taiwan Business Bank,Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):Head office 4.Reciprocal shareholding ratios:Na 5.Cause of occurrence:As Subject 6.Countermeasures:Na 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): In February,2026, the Bank reported the consolidated income before tax was NT $1,315 million, the consolidated income after tax was NT $1,006 million. The accumulated consolidated income before tax was NT $2,946 million, the accumulated consolidated income after tax was NT $2,322 million, the accumulated consolidated EPS before tax was NT$0.30, the accumulated consolidated EPS after tax was NT$0.24, consolidated book value per share was NT$15.45. Above figures are not audited or reviewed by CPA.

1.Date of occurrence of the change:2026/03/06 2.Elected or changed position (Please enter institutional director, institutional supervisor, independent director, natural-person director or natural-person supervisor):natural-person director 3.Title and name of the previous position holder:Che-Nan Wang 4.Resume of the previous position holder:Member, Overseas Community Affairs Council,Republic of China 5.Title and name of the new position holder:N/A 6.Resume of the new position holder:N/A 7.Circumstances of change (Please enter “resignation”, “dismissal”, “term expired”, “death” or “new appointment”):death 8.Reason for the change:death 9.Number of shares held by the new position holder when elected:N/A 10.Original term (from __________ to __________):2024/6/21~2027/6/20 11.Effective date of the new appointment:N/A 12.Turnover rate of directors of the same term:1/15 13.Turnover rate of independent directors of the same term:N/A 14.Turnover rate of supervisors of the same term:N/A 15.Change in one-third or more of directors (Please enter “Yes” or “No”):NO 16.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 6 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): We learned of his passing on March 6, 2026.

1.Date of submission to the board of directors or approval by the board of directors:2026/02/26 2.Date of approval by the audit committee:2026/02/25 3.Start and end dates of financial reports or annual self-assessed financial of the reporting period (XXXX/XX/XX~XXXX/XX/XX):2025/01/01~2025/12/31 4.Net interest revenue (expense) accumulated from 1/1 to end of the period (thousand NTD):20,605,925 5.Net revenue accumulated from 1/1 to end of the period (thousand NTD): 35,088,039 6.Profit (loss) before tax accumulated from 1/1 to end of the period (thousand NTD):15,244,962 7.Profit (loss) accumulated from 1/1 to end of the period (thousand NTD):12,231,819 8.Profit (loss) during the period attributable to owners of parent accumulated from 1/1 to end of the period (thousand NTD):12,231,819 9.Basic earnings (loss) per share accumulated from 1/1 to end of the period (NTD):1.26 10.Total assets end of the reporting period (thousand NTD):2,509,012,785 11.Total liabilities end of the reporting period (thousand NTD):2,362,100,079 12.Equity attributable to owners of parent end of the reporting period (thousand NTD):146,912,706 13.Any other matters that need to be specified:Na

1.Date of a notice of the board of directors meeting is issued:2026/02/11 2.Expected date of the board of directors meeting is convened:2026/02/26 3.Expected year and quarter of the financial reports or the annual self-assessed financial information submitted to the board of directors or approved by the board of directors:2025 Annual Financial Report 4.Any other matters that need to be specified:None

1.Date of occurrence of the event:2026/02/09 2.Company name:Taiwan Business Bank,Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):Head office 4.Reciprocal shareholding ratios:Na 5.Cause of occurrence:As Subject 6.Countermeasures:Na 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): In January,2026, the Bank reported the consolidated income before tax was NT $1,631 million, the consolidated income after tax was NT $1,316 million. The accumulated consolidated income before tax was NT $1,631 million, the accumulated consolidated income after tax was NT $1,316 million, the accumulated consolidated EPS before tax was NT$0.17, the accumulated consolidated EPS after tax was NT$0.14, consolidated book value per share was NT$15.28. Above figures are not audited or reviewed by CPA.

1.Date of institutional investor conference:2026/03/19 2.Time of institutional investor conference:14:00 3.Location of institutional investor conference:Webcast 4.Outline of institutional investor conference:Disclosure of Taiwan Business Bank's performance in 2025Q4, the conference will be conducted in Mandarin. 5.Any other matters that need to be specified:None.

1.Date of the board of directors resolution:2026/01/14 2.Name [issue no.__ of (secured, unsecured) corporate bonds of ___________ (company)]:Taiwan Business Bank 1st Senior Unsecured Financial Debentures in 2026. 3.Whether to adopt shelf registration (Yes/No):No 4.Total amount issued:TWD 1 Billion. 5.Face value per bond:To be determined. 6.Issue price:To be determined. 7.Issuance period:To be determined. 8.Coupon rate:To be determined. 9.Types, names, monetary values and stipulations of collaterals:N/A. 10.Use of the funds raised by the offering and utilization plan:To assist enterprises in the investment projects for environmental improvements and social benefits, etc. 11.Underwriting method:To be determined. 12.Trustees of the corporate bonds:None. 13.Underwriter or agent:To be determined. 14.Guarantor(s) for the issuance:None. 15.Agent for payment of the principal and interest:The Banking Department of Taiwan Business Bank. 16.Certifying institution:None. 17.Where convertible into shares, the rules for conversion:N/A. 18.Sell-back conditions:N/A. 19.Buyback conditions:N/A. 20.Reference date for any additional share exchange, stock swap, or subscription:N/A. 21.Possible dilution of equity in case of any additional share exchange, stock swap, or subscription:N/A. 22.Any other matters that need to be specified:None.

1.Date of occurrence of the event:2026/01/09 2.Company name:Taiwan Business Bank,Ltd. 3.Relationship to the Company (please enter ”head office” or ”subsidiaries”):Head office 4.Reciprocal shareholding ratios:Na 5.Cause of occurrence:As Subject 6.Countermeasures:Na 7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): In December,2025, the Bank reported the consolidated income before tax was NT $759 million, the consolidated income after tax was NT $631 million. The accumulated consolidated income before tax was NT $15,236 million, the accumulated consolidated income after tax was NT $12,225 million, the accumulated consolidated EPS before tax was NT$1.57, the accumulated consolidated EPS after tax was NT$1.26, consolidated book value per share was NT$15.14. Above figures are not audited or reviewed by CPA.