Quantum Data Energy PLC

(Incorporated in England and Wales)

(Registration Number: 12886458)

LEI :213800HFVHGJ9YGO9F71

Share code on the LSE: MAST

ISIN: GB00BNG90H86

Dated: 19 February 2026

Quantum Data Energy PLC

("Quantum", "QDE" or the "Company")

QDE Third FlexGen Asset Funding & Construction Progress Update,

and Acquisition of 7 MW FlexGen Brownfield Site Update

London, UK - Quantum Data Energy PLC (LSE: MAST) is pleased to announce, further to its RNS announcements dated 3 February 2026 and 9 February 2026 respectively, that the Company is continuing to make significant progress to get its third flexible generation power project to financial close and into construction and commercial operations. QDE is in advanced discussions with Power Balancing Services ("PBS"), regarding QDE's 100% owned Bordersley 5 MW flexible generation project, as previously announced.

QDE has agreed in principle with PBS to co-fund the capex of its Bordesley 5 MW flexgen project, and the capex funding will be structured at project SPV level. QDE and PBS are busy finalising the investment agreement which is in near final agreed form, and expected to be executed and completed shortly at which time the key terms of the transaction will be announced.

The rationale of partnering with PBS to co-fund the project's capex is mainly because QDE currently owns 100% of the shovel-ready project, which does not generate any income yet. In order for the project to go into commercial production and generate income, it requires construction and associated capex funding. The capex funding for a typical new-build 5 MW flexible generation project is around £3.5m. In order to limit dilution for QDE's existing shareholders, the Company chooses to apply capital discipline and efficiency and to partner with an experienced and reputable investor such as PBS to co-fund the capex of its development projects. The end result is that QDE will own a significant equity stake in an asset that is generating income, increase QDE's portfolio of MW's in production, increase QDE's revenues, with limited capital investment required from QDE.

Further, in tandem with finalising the investment agreement with PBS, full preparations are underway for the construction of the site. Comprehensive engineering, procurement, and construction ("EPC") proposals have been received from leading EPC contractors, and availability of key equipment confirmed. The site's grid- and gas connection construction are also underway. It is expected that the construction of the site will be completed and the site in full commercial production and income generating in Q4 2026. As a reminder, QDE's Pyebridge flexgen asset that is in production, currently generates total revenues of c. £290,000 per MW per annum (see RNS announcement dated 3 February 2026).

Progress Update on Acquisition of 7 MW Brownfield FlexGen Site:

QDE is pleased to announce, further to its RNS announcement dated 6 November 2025, that it has made significant progress towards the completion of the acquisition of the 7 MW 11kV flexible generation power brownfield site located in England (the "FlexGen Site"). All technical and legal due diligence have essentially been successfully completed, and the purchase contract is near final agreed form. QDE is awaiting final official confirmation from the DNO regarding the FlexGen Site's grid connection date under NESO's grid connection reform, which is expected around end March 2026. Once the aforementioned final official confirmation is received, it is expected that the purchase of the FlexGen Site will be completed shortly thereafter.

Pieter Krügel, CEO at Quantum Data Energy PLC, said: "We are delighted with the ongoing positive progress made to get our third flexgen asset constructed and into production. By applying capital discipline and efficiency, we limit QDE's capital requirements and dilution of existing shareholders. We are also working on a number of additional near term growth opportunities, and we look forward to providing the market with further positive progress updates over the coming weeks and months."

Issue of Broker Warrants:

Further to the Company's RNS announcement dated 9 February 2026, as part of the acceleration capital funding (the "Acceleration Capital") which was arranged by Fortified Securities ("Fortified"), the Company's sole corporate broker, the Company will grant to Fortified or associates, broker warrants valid for three years from the issue date which shall give Fortified the right to subscribe for one ordinary share for each warrant issued. The number of warrants to be issued is calculated as warrants equivalent to 6% of the gross aggregate value of the Acceleration Capital consideration at the Placing Price.

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About Quantum Data Energy PLC:

Quantum Data Energy PLC (LSE: MAST) is a UK-based developer, operator and owner of flexible generation power assets. The Company delivers flexible, modular power solutions to the UK grid and AI datacentres worldwide, enabling scalable, reliable energy for next-generation digital infrastructure. The Company has deep expertise in infrastructure planning, grid access, gas access, and efficient power supply. Its new AI power supply strategy is intended to position Quantum as a leading AI infrastructure platform on the London Stock Exchange.

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.