Quantum Helium Limited

Report Publication Announcement • Sep 24, 2025

National Storage Mechanism | Additional information

RNS Number : 6138A

Mosman Oil and Gas Limited

24 September 2025

24 September 2025

Mosman Oil and Gas Limited

("Mosman" or the "Company")

Investor Presentation Available

Mosman Oil and Gas Limited (AIM: MSMN), the helium, hydrogen and hydrocarbon company, announces that its latest Investor Presentation (September 2025) is now available on the Company's website.

Highlights from the presentation include:

·      Independent Sproule audit confirms 2U helium gross prospective resource of 134 MMscf at Sagebrush, with upside potential to 269 MMscf.

·      Near-term catalysts: high-resolution 3D seismic survey commencing October 2025 and extended flow test Q4 2025-Q1 2026.

For further information, please visit: www.mosmanoilandgas.com

Enquiries:

Mosman Oil & Gas Limited Carl Dumbrell Chairman	NOMAD and Joint Broker SP Angel Corporate Finance LLP Stuart Gledhill / Richard Hail / Adam Cowl +44 (0) 20 3470 0470
Brand Communications Alan Green Tel: +44 (0) 7976 431608	Joint Broker CMC Markets UK Plc Douglas Crippen +44 (0) 020 3003 8632

Updates on the Company's activities are regularly posted on its website:  www.mosmanoilandgas.com

Notes to editors

Mosman (AIM: MSMN) is a helium, hydrogen and hydrocarbon exploration, development, and production company with projects in the US and Australia. Mosman's strategic objectives remain consistent: to identify opportunities which will provide operating cash flow and have development upside, in conjunction with progressing exploration. The Company has several projects in the US, in addition to royalty interests in Australia.

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