On March 20, 2023, Hanoi Stock Exchange announces Decision No. 157/QD-SGDHN putting the following stock on alert: • Issuer: PetroVietnam Oil Corporation • Securities type: common stock • Stock code: OIL • Base of review: Audited Financial Statement 2022 • Effective date: 22/03/2023 (March 22, 2023) • Reason: The audit organization have expressed a qualified opinion on the Annual Financial Statements for 03 consecutive years or more • Applicable law(s): Point a, Clause 1 Article 33 of the Regulation attached to Decision No. 34/QD-HDTV dated November 16, 2022 of the Vietnam Stock Exchange Within 15 days from the date the stock is put on alert as prescribed in Article 1 of this Decision,
PetroVietnam Oil Corporation must send a document to the HNX to explain the cause and provide a remedy.