Sinopec Investment Holding Announces Name Change to Sinopec Holding Co., Ltd.

Release Date: July 10, 2026 Statement Date: July 9, 2026 Statement Time: 07:00:03 Company Code: 3708 Company Name: Sinopec Investment Holding

Subject: Announcement of the company name change from 'Sinopec International Investment Holding Co., Ltd.' to 'Sinopec International Holding Co., Ltd.', with the announcement period from June 11, 2026 to September 10, 2026.

Applicable Clause: Clause 51 Factual Date: June 11, 2026

Details: 1. Factual Date: June 11, 2026 (Minguo Year 115) 2. Company Name: Sinopec International Holding Co., Ltd. (formerly: Sinopec International Investment Holding Co., Ltd.) 3. Relationship with Company: The Company 4. Cross-shareholding Ratio: Not applicable 5. Reasons for Change: (1) Date of Name Change Approval / Factual Date: June 11, 2026 (Minguo Year 115) (2) Approval Document Number: Jing-Shou-Shang No. 11530084540 (3) Shareholders' Meeting Resolution Date for Name Change: May 28, 2026 (Minguo Year 115) (4) Previous Company Name: Sinopec International Investment Holding Co., Ltd. (5) New Company Name: Sinopec International Holding Co., Ltd. (6) Previous Abbreviated Name: Sinopec Investment Holding (7) New Abbreviated Name: Sinopec Holding 6. Countermeasures: None 7. Other Matters to be Clarified: (1) The company received the Ministry of Economic Affairs' approval notice for change registration on June 11, 2026. (2) According to Article 45 of the Taiwan Stock Exchange Corporation's Business Rules, a three-month consecutive public announcement is required after the name change. (3) The company's stock code remains unchanged; ordinary shares continue under '3708'.