PRIO Operational Data for the month of August

September 3, 2025 – PRIO S.A. (“Company” or “PRIO”) (B3: PRIO3), following best practices incorporate governance and transparency, informs its preliminary and non-audited Operational Data for the month of August.

Key:

(1) At the Polvo and Tubarão Martelo cluster, production was affected by the shutdown of TBMT-6H well due to the failure of the Submerged Centrifugal Pump, which had been operating since the field’s production start. The workover has already begun and is expected to be completed in September. (2) At the Peregrino field, production was temporarily affected by the FPSO shutdown following an ANP audit, as disclosed in the Material Fact dated August 18, 2025. PRIO, as a consortium partner and future operator, continues to support Equinor (the current operator of the field) in meeting the regulatory requirements within the previously established timeframe.