Quantum Helium Limited

Share Issue/Capital Change • Jul 4, 2025

National Storage Mechanism | Additional information

RNS Number : 8474P

Mosman Oil and Gas Limited

04 July 2025

4 July 2025

Mosman Oil and Gas Limited

("Mosman" or the "Company")

Grant of Options

Further to the Company's announcement of 25 June 2025, Mosman Oil & Gas Limited (LSE: MSMN), today announces the Granting of previously agreed Options pursuant to the passing of Resolution 5 at the Company Annual General Meeting held on 29 November 2024, a total of 229,815,217 options with an exercise price of 0.077p, exercisable for 3 years have been granted to Mr. Andrew Carroll.

Mr. Carroll now holds a total of 466,862,680 warrants/options in the Company. The exercise price of the options was calculated and announced previously and was based on a premium to the average 5-day VWAP share price ahead of the AGM.

Total Warrants/Options over shares in the Company outstanding as at 30 June 2025.

Number of Warrants/Options	Exercisable at	Expiry Date
428,571,428	0.07p	20 July 2025
80,000,000	0.025p	5 December 2025
120,000,000	0.025p	8 February 2026
63,157,895	0.025p	13 February 2026
254,571,428	0.035p	19 September 2026
194,942,200	0.077p	10 December 2027
229,815,217	0.077p	30 June 2028

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
Alma Justine James / Will Merison +44 (0) 20 3405 0205 +44 (0) 7525 324431 mosman@almastrategic.com	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 interest in the Amadeus Basin in Central Australia.

1.

Details of PDMR/person closely associated with them ("PCA")

a)

Name

Andy Carroll

2.

Reason for the notification

a)

Position/status

Former CEO Director

b)

Initial notification/

amendment

Initial notification

3.

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Full name of the entity

Mosman Oil and Gas Limited

b)

Legal Entity Identifier code

213800PWZID9URNNGZ54

4.

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Identification code

Ordinary shares of Mosman Oil and Gas Limited

AU0000XINET1

b)

Nature of the transaction

Issue of options

c)

Price(s) and volume(s)

Price(s)	Volume(s)
0.077p	229,815,217

d)

Aggregated information

-     Aggregated volume

-     Price

Single transaction as in 4c) above

e)

Date of the transaction

4 July 2025

f)

Place of the transaction

Outside a trading venue

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