Cathay Financial Holdings: Announcement by Subsidiary Cathay Securities Regarding Change in Accounting Supervisor

1. Type of personnel change (please enter spokesperson, acting spokesperson, important operational supervisor (e.g. CEO, COO, CMO, CSO, etc.), financial supervisor, accounting supervisor, corporate governance supervisor, information security officer, R&D supervisor, internal audit supervisor or litigation and non-litigation agent): Accounting Supervisor 2. Date of change: 2026/05/13 3. Name, position, and brief resume of the former incumbent: Li Ting-Fang / Senior Assistant Vice President, Cathay Securities 4. Name, position, and brief resume of the new incumbent: Yuan Rong-Chan / Assistant Vice President, Cathay Securities 5. Details of change (please enter "resignation", "job reassignment", "layoff", "retirement", "death", "new appointment" or "dismissal"): Job reassignment 6. Reason for change: Job reassignment 7. Effective date: 2026/05/14 8. Other matters that need to be specified: None