[GSEO] Announcement of Correction to Intercompany Transaction Filing for March 2026

1. Date of occurrence: May 21, 2026 2. Company name: General Optics (GSEO) 3. Relationship with the company (Parent or subsidiary): Parent company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: Correction of self-reported information for March 2026 related party transactions. 6. Corrected item/Report name: Accounts Receivable / Related Party Transaction Filing Details 7. Amount/Content/Page before correction: - Related party: Honfujin - Monthly change in accounts receivable: NT$0 thousand - Year-to-date accounts receivable: NT$421 thousand - Percentage of YTD consolidated financial statements: 0.07% - Related party: Rongguang Optics - Monthly change in accounts receivable: NT$809 thousand - Year-to-date accounts receivable: NT$104,924 thousand - Percentage of YTD consolidated financial statements: 17.29% 8. Amount/Content/Page after correction: - Related party: Honfujin - Monthly change in accounts receivable: NT$12 thousand - Year-to-date accounts receivable: NT$433 thousand - Percentage of YTD consolidated financial statements: 0.09% - Related party: Rongguang Optics - Monthly change in accounts receivable: -NT$6,061 thousand - Year-to-date accounts receivable: NT$47,864 thousand - Percentage of YTD consolidated financial statements: 10.47% 9. Countermeasures: Corrected the March 2026 self-reported figures for related party transactions and re-uploaded to the Market Observation Post System (MOPS). 10. Other matters: None.