20 February 2025

Mosman Oil and Gas Limited

("Mosman" or the "Company")

EPA-155 Update

Mosman Oil and Gas Limited (AIM: MSMN) the helium, hydrogen and hydrocarbon exploration, development and production company, notes Georgina Energy (AIM: GEX) has today updated on its progress re EPA-155, further to Mosman's announcement on 22 January 2025.

The parties have now entered into a formal share sale and purchase agreement with completion subject to government approvals. Mosman has received the AU$50,000 non-refundable deposit.

Andy Carroll, Chief Executive Officer of Mosman, said "This is a further step in commercialising Mosman's broad portfolio by securing royalties whilst reducing operating costs and potential capital expenditure. This will enable management to focus and facilitate capital allocation to lower cost exploration in USA where there is also established helium infrastructure and growing markets."

See the full announcement here: https://www.londonstockexchange.com/news-article/GEX/contract-of-sale-executed-for-epa155-mt-winter/16906926

Enquiries:

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 exploration projects in the Amadeus Basin in Central Australia.