National Storage Mechanism | Additional information

Mendell Helium plc

("Mendell Helium" or the "Company")

Result of AGM

The Annual General Meeting of the Shareholders of Mendell Helium was held today at 10.30 am (UK) at Edinburgh Printmakers, Castle Mills, 1 Dundee Street, Edinburgh, EH3 9FP . The Company is pleased to confirm that all resolutions were duly passed.

Full details of the poll results are set out below:

Resolution	For	Against	Discretion to Chairman	Withheld	Total
01	27,638,905	Nil	Nil	113,918	27,752,823
02	27,585,679	53,226	Nil	113,918	27,752,823
0 3	27,425,679	53,226	Nil	273,918	27,752,823
04	27,638,905	Nil	Nil	113,918	27,752,823
05	27,585,679	53,226	Nil	113,918	27,752,823
06	27,638,905	Nil	Nil	113,918	27,752,823
07	27,638,905	Nil	Nil	113,918	27,752,823
08	27,478,905	269,554	Nil	4,364	27,752,823
09	27,478,905	269,554	Nil	4,364	27,752,823
10	27,748,459	Nil	Nil	4,364	27,752,823

The number of shares in issue at 6:30 p.m. (UK) on 29 October 2025 was 116,155,653. The Company does not hold any shares in treasury.

ENDS

Engage with the Mendell Helium management team directly by asking questions, watching video   summaries and seeing what other shareholders have to say. Navigate to our Interactive Investor   website here: https://mendellhelium.com/s/a6a55a

Enquiries:

Investor questions on this announcement

We encourage all investors to share questions

on this announcement via our investor website

https://mendellhelium.com/s/a6a55a

Mendell Helium plc

Nick Tulloch, CEO

Via our website

[email protected]

Cairn Financial Advisers LLP (AQSE Corporate Adviser)

Ludovico Lazzaretti / Liam Murray

Tel: +44 (0) 20 7213 0880

SI Capital Limited (Broker)

Nick Emerson

Tel: +44 (0) 1483 413500

Stanford Capital Partners Ltd (Broker)

Patrick Claridge/ Bob Pountney

Tel: +44 (0) 203 3650 3650/51

Fortified Securities

Guy Wheatley

Tel: +44 (0) 203 4117773

Brand Communications (Public & Investor Relations)

Alan Green

Tel: +44 (0) 7976 431608

Overview of M3 Helium

Mendell Helium announced on 27 June 2024 that it has entered into an option agreement to acquire the entire issued share capital of M3 Helium through the issue of 57,611,552 new ordinary shares in Mendell Helium to M3 Helium's shareholders. The exercise of the option will constitute a reverse takeover pursuant to AQSE Rule 3.6 of the Access Rule Book and is subject to, inter alia, publication of an admission document.

M3 Helium has interests in ten wells in South-Western Kansas of which five (Peyton, Smith, Nilson, Bearman and Demmit) are in production. Eight of the company's wells are within the Hugoton gas field, one of the largest natural gas fields in North America. Significantly these wells are in the proximity of a gathering network and the Jayhawk gas processing plant meaning that producing wells can quickly be tied into the infrastructure.

The ninth well, Rost, is in Fort Dodge, just to the east of Dodge City, Kansas. It was tested in July 2024 as containing 5.1% helium composition and a previous drill stem test yielded a maximum flow rate of approximately 2,900 Mcf per day. M3 Helium owns a mobile Pressure Swing Adsorption production plant which has been installed on site and will be used to purify the produced helium. The plant is capable of processing up to 800 Mcf per day of raw gas and purifying it up to 99.999% helium.

The tenth well, Brobee, is a disposal well that has been authorised at 5,000 barrels of water per day at 1,200 psi.

M3 Helium is also developing a Bitcoin mining operation in Nebraska where it has taken a lease of land prospective for biogenic methane and is drilling a pilot well (Jasper). It is onboarded for custody with Bitgo Inc. and its Bitcoin treasury management policy is available at https://mendellhelium.com/bitcoin-treasury.

Forward Looking Statements

These forward-looking statements are not historical facts but rather are based on the Company's current expectations, estimates, and projections about its industry; its beliefs; and assumptions. Words such as 'anticipates,' 'expects,' 'intends,' 'plans,' 'believes,' 'seeks,' 'estimates,' and similar expressions are intended to identify forward-looking statements. These statements are not a guarantee of future performance and are subject to known and unknown risks, uncertainties, and other factors, some of which are beyond the Company's control, are difficult to predict, and could cause actual results to differ materially from those expressed or forecasted in the forward-looking statements. The Company cautions security holders and prospective security holders not to place undue reliance on these forward-looking statements, which reflect the view of the Company only as of the date of this announcement. The forward-looking statements made in this announcement relate only to events as of the date on which the statements are made. The Company will not undertake any obligation to release publicly any revisions or updates to these forward-looking statements to reflect events, circumstances, or unanticipated events occurring after the date of this announcement except as required by law or by any appropriate regulatory authority.