SanShang Electric Wins Ocean Affairs Council Coast Guard Administration's 'Next-Generation Radar System' Project CGA115016

1. Date of Event: July 1, 2026 (Minguo Year 115) 2. Company Name: SanShang Computer Co., Ltd. 3. Relationship to Company: Parent Company 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: SanShang Computer Co., Ltd. has won the Ocean Affairs Council Coast Guard Administration's CGA115016 'Next-Generation Radar System' project, with a winning bid amount of NT$4,447,916,700 (inclusive of tax). 6. Response Measures: None 7. Other Matters to be Disclosed (If the subject of the event or resolution is a publicly issued company or above, this significant information also meets the criteria under Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act, concerning matters of significant impact on shareholder rights or securities prices): Client: Ocean Affairs Council Coast Guard Administration. Project Location: Taiwan Mainland and Outlying Islands. Completion Deadline: Within the period from the day after bid award to December 31, 2035 (Minguo Year 124), including a 4-year installation phase (2026–2029), a 2-year warranty period (2030–2031), and a 4-year maintenance phase (2032–2035).