Board Changes

14 March 2025

Rosslyn Data Technologies plc

("Rosslyn", the "Group" or the "Company")

Board Changes

Rosslyn (AIM: RDT), the provider of a leading cloud-based enterprise spend intelligence platform, is pleased to announce the appointment of Dr John Chessher as an Independent Non-Executive Director with immediate effect. John will replace Ginny Warr who has informed the Company of her decision to step down as a Non-Executive Director of the Company due to increased commitments in her executive role. Ginny will step down from the Board on 31 March 2025.

John has 30 years' investment industry experience and has held CEO and director-level positions at leading asset management and investment banking firms. He has most notably previously acted as CEO of Cenkos Securities Asia and as Head of Asia Pacific Research at Schroder Investment Management. John is currently a Non-Executive Director of Sunda Energy plc, an AIM-listed exploration and appraisal company focussed on gas assets in Southeast Asia.

John is a CFA charter-holder, holds an MA in Engineering Science from Oxford University and DBA, MSc and MBA qualifications from Henley Business School.

Following his appointment, John will act as Chair of the Audit and Remuneration Committees.

James Appleby, Chairman of Rosslyn, said: "I am delighted to welcome John to the Board of Rosslyn. We look forward to working with him and benefitting from his significant corporate experience. I would also like to thank Ginny for her excellent contribution over the past few years and we wish her well for the future."

Enquiries

Further information on Dr John Chessher

John Robert Chessher (aged 62) has held the following directorships in the past 5 years:

Dr John Chessher does not own any ordinary shares or options over ordinary shares in the Company.

There is no further information on Dr John Chessher required to be disclosed under Schedule Two, paragraph (g) of the AIM Rules for Companies.

About Rosslyn

Rosslyn (AIM: RDT) provides an award-winning spend intelligence platform. The Rosslyn Platform helps organizations with diverse supply chains mitigate risk and make informed strategic decisions. It leverages automated workflows, artificial intelligence and machine learning to extract and consolidate procurement data providing visibility of complex supplier data, enabling supplier spend savings and delivering rapid ROI. For more information visit www.rosslyn.ai. Investors wishing to contact the Company should email [email protected].