Brookside Reports 12.52MMBOE 2P Reserves

• 12.52 MMBOE of Total Proved plus Probable (2P) Net Reserves
• Total Proved (1P) Net Reserves increased ~7% to 5.33 MMBOE
• Proved Developed Producing (PDP) Net Reserves increased ~5% to 2.80 MMBOE

Brookside Energy Ltd (ASX: BRK) reported its year-end 2025 reserves certification, with Total Proved plus Probable (2P) Net Reserves of 12.52 MMBOE, independently assessed by Haas & Cobb as at 31 December 2025. The results reflect the continued development of Brookside's acreage position within the SWISH play in the Anadarko Basin, Oklahoma. During the year, the Company increased both Proved Developed Producing (PDP) and Total Proved (1P) reserves, driven by the performance of Brookside's operated horizontal wells and the conversion of drilling results into booked reserves. Total 2P reserves increased modestly to 12.52 MMBOE, with reserves additions during the year offsetting production. The reserves are primarily associated with Brookside's operated horizontal wells targeting the Sycamore and Woodford formations within the SWISH play. Well performance continues to support the Company's reserves estimates and development outlook. Brookside retains a substantial inventory of future development locations across its SWISH acreage position, providing a long runway to convert development locations into producing reserves over time.