This announcement contains information which, prior to its disclosure, was inside information as stipulated under Regulation 11 of the Market Abuse (Amendment) (EU Exit) Regulations 2019/310 (as amended). Upon the publication of this announcement via a Regulatory Information Service, this inside information is now considered to be in the public domain.

4 March 2026

DeFi Development Corporation UK PLC

(the "Company")

Board Changes

DeFi Development Corporation UK PLC (LSE: DFDV), a Main Market listed company which offers an AI agent platform that enables businesses to automate tasks through the use of specialised digital workers for sales, recruitment and research and has adopted a Solana focused digital asset treasury strategy, announces the following Board changes:

Robert Mayfield and Jonathan Hives, both Non-Executive Directors, will cease to be directors of the Company with immediate effect.

Ewan Collinge, Chief AI Officer, will cease to be a director following the conclusion of his notice period on 4 September 2026.

Following the above changes, the Board of Directors of the Company will comprise:

•  Hadley Stern - Independent Non-Executive Chairman

•  Michael Chan - Chief Executive Officer

•  Nathalie Maggi - Chief Financial Officer

Comments from Michael Chan, CEO of DeFi Development Corporation UK PLC:

"We thank Rob, Jonathan and Ewan for their dedicated service and invaluable contributions in establishing and growing the AI Agent platform. We are pleased to confirm that the search for their successors is advanced, focusing on a balance of expertise and independent oversight.

We wish them the very best for their future endeavours."

The Directors of the Company accept responsibility for this announcement.

For further information: