Retail Offer

Mosman Oil and Gas Limited or the "Company" (AIM:MSMN) the hydrocarbon, helium and hydrogen exploration, development, and production company, is pleased to announce an offer to its existing retail shareholders CMC CapX (the "Retail Offer") of new ordinary shares of NPV each in the capital of the Company (the "Retail Offer Shares").

In addition to the Retail Offer, the Company is also conducting a placing of new ordinary shares (the "Placing Shares" and together with the Retail Offer Shares, the "Fundraising Shares") (the "Placing"). The price of the Fundraising Shares is 0.045p (the "Issue Price").

The Retail Offer and the Placing are conditional on, the Fundraising Shares being admitted to trading on the AIM market operated by London Stock Exchange plc ("Admission"). Admission is expected to take place at 8.00 a.m. on 27th May 2025. Completion of the Retail Offer is conditional, inter alia, upon the completion of the Placing.

The Retail Offer

The Retail Offer is expected to close by 4pm on 20th May 2025, but the Company reserves the right to close it earlier. Eligible Shareholders should note that financial intermediaries may also have earlier closing times.

Expected timetable

There is a minimum subscription of £250 per investor. The terms and conditions on which investors subscribe will be provided by the relevant financial intermediaries including relevant commission or fee charges.

The Retail Offer is not being made into any jurisdiction other than the United Kingdom.

UK Product Governance Requirements

EU Product Governance Requirements

Solely for the purposes of the product governance requirements contained within: (a) EU Directive 2014/65/EU on markets in financial instruments, as amended ("MiFID II"); (b) Articles 9 and 10 of Commission Delegated Directive (EU) 2017/593 supplementing MiFID II; and (c) local implementing measures (together, the "MiFID II Product Governance Requirements"), and disclaiming all and any liability, whether arising in tort, contract or otherwise, which any "manufacturer" (for the purposes of the MiFID II Product Governance Requirements) may otherwise have with respect thereto, the Retail Offer Shares have been subject to a product approval process, which has determined that the Retail Offer Shares are: (i) compatible with an end target market of retail investors and investors who meet the afor distribution through all distribution channels as are permitted by MiFID II (the "EU Target Market Assessment"). Notwithstanding the EU Target Market Assessment, distributors should note that: the price of the Retail Offer Shares may decline and investors could lose all or part of their investment; the Retail Offer Shares offer no guaranteed income and no capital protection; and an investment in the Retail Offer Shares is compatible only with investors who do not need a guaranteed income or capital protection, who (either alone or in conjunction with an appropriate financial or other adviser) are capable of evaluating the merits and risks of such an investment and who have sufficient resources to be able to bear any losses that may result therefrom. The EU Target Market Assessment is without prejudice to the requirements of any contractual, legal or regulatory selling restrictions in relation to the Retail Offer.