2026 Reserves and Resources Statement

• Horizon net Proved + Probable (2P) Reserves increased 51% to 13.6 MMboe
• Significant reserves additions through acquisitions in Thailand and Australia
• FY26 net production of 2.1 MMboe, up from 1.6 MMboe last year
• Contingent Resources increased by 61% to 19.8 MMboe
• Prospective Resources surged to 14.3 MMboe from 2.6 MMboe

Horizon Oil Ltd has released its 2026 Reserves and Resources Statement, highlighting significant growth in reserves and resources. The company's net Proved + Probable (2P) Reserves increased by 51% to 13.6 MMboe from 9.0 MMboe as at 30 June 2025, primarily due to acquisitions in Thailand and Australia. The company's net 2C Contingent Resources also increased by 61% to 19.8 MMboe, while Prospective Resources surged to 14.3 MMboe from 2.6 MMboe. Horizon's total net production for FY26 was 2.1 MMboe, up from 1.6 MMboe the previous year, with contributions from Thailand and stable production in China, New Zealand, and Australia.