Results of Retail Offer

Mosman Oil and Gas ("Company") (AIM:MSMN) is pleased to announce that, further to its announcement of 16 May 2025, it has raised £300,000 (before expenses) via the issue of 666,666,666 new ordinary shares of no par value each in the capital of the Company (the "Retail Offer Shares") at a price of 0.045p per share (the "Issue Price"), pursuant to its offer to its existing retail shareholders via CMC CapX. (the "Retail Offer").

Under the Placing and the Retail Offer, the Company has raised aggregate gross proceeds of £1.55m.

Admission to AIM and Total Voting Rights

The Retail Offer is conditional on, inter alia, the Retail Offer Shares being admitted to trading on AIM. Application has been made to the London Stock Exchange for the Retail Offer Shares, which will rank pari passu with the Company's existing issued ordinary shares, to be admitted to trading on AIM and dealings are expected to commence at 8:00 a.m. on or about 27 May 2025. Completion of the Retail Offer is also conditional, inter alia, upon the completion of the Placing, which is expected to complete on admission of the Placing Shares on 22 May 2025.

Following the issue of the Retail Offer Shares, the Company's total voting rights will comprise 22,981,521,662 Ordinary Shares of no par value and the Company does not hold any shares in treasury. Consequently, the above figure may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company in accordance with the Companies' Articles.