Notice of GM

(Registration Number: 12886458)

Share code on the LSE: MAST

('MED' or 'the Company')

Dated: 16 June 2025

Mast Energy Developments PLC

Notice of General Meeting

Mast Energy Developments PLC, the UK-based multi-asset owner, developer, and operator in the rapidly growing flexible power market, announces, further to its previous RNS announcements dated 23 May 2025 and 4 June 2025 respectively, that it will hold a General Meeting ("GM") at 12 noon on Tuesday, 8 July 2025, at its registered office, Salisbury House, London Wall, United Kingdom, EC2M 5PS. The Notice of GM is being dispatched in the post to shareholders today. The Notice of GM is also uploaded on the Company's website and can be accessed at the following link: https://www.med.energy/companydocuments.

Shareholders should note that GM Notice contains, inter alia resolutions to seek shareholder approval for the proposed share consolidation and the necessary share headroom to accommodate the Equity Fundraise as outlined in the Company's RNS announcement of 23 May 2025. Further, the Company is making good progress with the finalisation of the necessary Supplementary Prospectus with the FCA, approval and publication of which will also be required to complete the Equity Fundraise. Subject to the resolutions being passed at the GM on 8 July 2025 and the approval of the Supplementary Prospectus by the FCA for publication prior to that date, the anticipated closing of the Equity Fundraising is expected to be around 9 July 2025.

Pieter Krügel, MED CEO, commented: "We are making good progress with satisfying the necessary conditions in order to complete the Equity Fundraise, most notably shareholder approval at the upcoming GM and the approval and publication of the associated Supplementary Prospectus. The anticipated completion of the Equity Fundraise in July 2025 will significantly improve and strengthen the Company's balance sheet, and enable the acceleration of our goal to achieve a 300+ MW portfolio. We trust that our shareholders' see the potentially significant value of the Equity Fundraising and the opportunities it will unlock following closing."