3583 Hsin Ying: Discloses Financial Information Due to Exchange Trading Alert Threshold

Disclosure Date: June 23, 2026 Statement Date: June 22, 2026 Statement Time: 15:27:42 Company Code: 3583 Company Name: Hsin Ying Enterprise Co., Ltd.

Subject: Disclosure of significant financial and operational information due to the company's securities reaching the Taiwan Stock Exchange's threshold for public trading alerts, to ensure investor clarity and prevent misunderstanding.

Applicable Clause: Item 51 Event Date: June 22, 2026

Details: 1. Event Date: June 22, 2026 2. Reason: In compliance with notification from the Taiwan Stock Exchange Corporation 3. Financial and Operational Information:

(1) Consolidated Financial Data (in million NTD):

| Item | Most Recent Month (May 2026) | YoY Change % | Most Recent Quarter (Q1 2026) | YoY Change % | Last Four Quarters Cumulative (Q2 2025 – Q1 2026) | |------|-------------------------------|-------------|-------------------------------|-------------|---------------------------------------------------| | Operating Revenue | 971 | 1% | 3,120 | 11% | 11,679 | | Pre-tax Net Profit | 109 | 5% | 441 | 20% | 1,615 | | Net Profit Attributable to Owners of Parent | 158 | 17% | 333 | 29% | 1,185 | | Earnings Per Share (NTD) | 1.97 | 17% | 4.14 | 29% | 14.76 |

4. Whether there are material events under Article 4 of the 'TSEC Procedures for Verification and Disclosure of Material Information by Listed Companies': No 5. Whether there is a material information press conference scheduled under Article 11 of the same procedures: No 6. Complete financial information is available on the Public Information Observation System. Access paths: (1) Recent operating revenue and profit/loss: Basic Information > Summary Version (2) Historical monthly revenue: Operations Overview > Monthly Revenue > Monthly Revenue Information under IFRS (3) Historical profit/loss (audited/reviewed): Financial Statements > Under IFRS > Consolidated/Individual > Comprehensive Income Statement (4) Historical profit/loss (self-announced preliminary figures): Operations Overview > Preliminary Profit/Loss Announcements 7. Other Matters to be Disclosed: None.