Nankang Rubber (2101) Announces 21st Share Buyback Program

Announcement Date: May 19, 2026 Company Code: 2101 Company Name: Nankang Subject: Board resolution to conduct the 21st share buyback.

1. Date of Board Resolution: May 19, 2026 2. Purpose: Transfer to employees. 3. Type of Shares: Common stock. 4. Maximum Buyback Amount: 4,007,924,379 TWD 5. Execution Period: May 19, 2026, to July 18, 2026. 6. Number of Shares to be Repurchased: 2,200,000 shares. 7. Price Range: 27.00 to 45.00 TWD. 8. Execution Method: Open market repurchase. 9. Ratio to Total Issued Shares: 0.30%. 10. Accumulated Shares Held: 108,656,595 shares. 11. Recent History (past 5 years): (1) Feb 24 - Mar 9, 2026: 2.2 million shares (100% execution) (2) Jan 6 - Feb 3, 2026: 2.2 million shares (100% execution) (3) Nov 5, 2025 - Jan 2, 2026: 2.037 million shares (93% execution) (4) Jul 31 - Sep 3, 2025: 1.833 million shares (83% execution) (5) Apr 17 - Jun 5, 2025: 3.199 million shares (29% execution) 12. The board has declared that this buyback will not affect the company's capital maintenance. An auditor has deemed the price range reasonable.