[Anderson Group] Correction of Announced Monthly Revenue for Jan-Feb 2026 and Cumulative Revenue for Jan-Apr 2026

1. Date of occurrence: 2026/05/20 2. Company name: Anderson Group Co., Ltd. 3. Relationship to the company (input this company or subsidiary): This company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: After the review of the first quarter of 2026 by the accountant, a discrepancy between the announced revenue and the reviewed figures arose due to the elimination of internal transactions in consolidated statements and different foreign currency conversion bases. 6. Corrected information item/report name: Announced monthly revenue for Jan-Feb 2026 and cumulative revenue for Jan-Apr 2026. 7. Pre-correction amount/content: Jan 2026 monthly revenue: NT$250,494 thousand; Cumulative revenue: NT$250,494 thousand. Feb 2026 monthly revenue: NT$220,658 thousand; Cumulative revenue: NT$471,152 thousand. Mar 2026 monthly revenue: NT$277,042 thousand; Cumulative revenue: NT$748,194 thousand. Apr 2026 monthly revenue: NT$241,070 thousand; Cumulative revenue: NT$989,264 thousand. 8. Post-correction amount/content: Jan 2026 monthly revenue: NT$225,360 thousand; Cumulative revenue: NT$225,360 thousand. Feb 2026 monthly revenue: NT$209,702 thousand; Cumulative revenue: NT$435,062 thousand. Mar 2026 monthly revenue: NT$277,042 thousand; Cumulative revenue: NT$712,104 thousand. Apr 2026 monthly revenue: NT$241,070 thousand; Cumulative revenue: NT$953,174 thousand. 9. Response measures: After announcing the material information on the Market Observation Post System, the corrected amounts will be re-uploaded. 10. Other matters to be specified: None.