Xingtai Industrial Corrects March and YTD April Revenue Figures Following Accounting Review

Reporting Date: May 19, 2026 Company Code: 1235 Company Name: Xingtai Subject: Correction of the company's March single-month and March-April cumulative revenue announcement.

Explanation: 1. Date of Occurrence: 2026/05/19 2. Company Name: Xingtai Industrial Co., Ltd. 3. Relationship with the company: The company itself. 4. Mutual shareholding ratio: Not applicable. 5. Reason for occurrence: Following the 2026 Q1 review by a certified public accountant, adjustments were made to the timing of revenue recognition for subsidiaries. 6. Items of correction: March 2026 single-month revenue; March-April cumulative revenue. 7. Figures before correction: March 2026 single-month revenue: 27,060 thousand TWD; cumulative: 66,770 thousand TWD. April 2026 single-month revenue: 14,862 thousand TWD; cumulative: 81,632 thousand TWD. 8. Figures after correction: March 2026 single-month revenue: 19,260 thousand TWD; cumulative: 58,970 thousand TWD. April 2026 single-month revenue: 14,862 thousand TWD; cumulative: 73,832 thousand TWD. 9. Countermeasures: Re-uploading the corrected amounts after releasing a major message on the Market Observation Post System. 10. Other notes: None.