Exercise of Warrants, Issue of Equity & TVR

Mast Energy Developments PLC

(Incorporated in England and Wales)

(Registration Number: 12886458)

LEI :213800HFVHGJ9YGO9F71

Share code on the LSE: MAST

ISIN: GB00BNG90H86

('MED' or 'the Company')

Dated: 1 September 2025

MAST Energy Developments PLC

("MED" or the "Company")

Exercise of Warrants, Issue of Equity & TVR

Mast Energy Developments PLC, the UK-based multi-asset owner, developer, and operator in the rapidly growing Flexible Generation Power market, announces that it has received notices of the exercise of Prepaid Warrants, issued pursuant to the Equity Fundraise announced on 11 July 2025, for a total of 2,155,000 ordinary shares in the Company at a price of 4 pence per ordinary share.

Application will be made for the admission of the 2,155,000 new ordinary shares to trading on the LSE ("Admission") pursuant to the authorities approved by shareholders at the General Meeting on 8 July 2025. The shares will rank pari passu with the existing ordinary shares and it is expected that Admission will become effective at 8.00 a.m. on 3 September 2025.

Following Admission, the Company's issued share capital will consist of 16,903,927 ordinary shares with voting rights. MED does not hold any ordinary shares in treasury. This figure of 16,903,927 may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they require to notify their interest in, or a change to their interest in, the share capital of the Company under the UK Financial Conduct Authority's Disclosure Guidance and Transparency Rules.

Following Admission, the beneficial holding of Paul Venter, non-executive director and chairman of the Company, will change from 13.28% to 11.59% interest in the issued share capital of the Company. Further, following Admission, the beneficial holding of Riverfort Global Opportunities PCC Ltd will change from 11.56% to 10.09%.

Stay up to date with MED's latest news and updates by joining our emailing list and social media channels, as follows:

MED general enquiries - https://www.med.energy/contact

MED email alerts - https://www.med.energy/rnsannoucements-1

MED LinkedIn page - https://uk.linkedin.com/company/mast-energy-developments-plc

MED X (formerly Twitter) handle - @mastplc

ENDS

This announcement contains inside information for the purposes of the UK version of the Market Abuse Regulation (EU No. 596/2014) as it forms part of United Kingdom domestic law by virtue of the European Union (Withdrawal) Act 2018 ('UK MAR'). Upon the publication of this announcement, this inside information is now considered to be in the public domain.