Result of Retail Offer

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, TO US PERSONS OR INTO OR WITHIN THE UNITED STATES, AUSTRALIA, CANADA, SOUTH AFRICA OR JAPAN, OR ANY MEMBER STATE OF THE EEA, OR ANY OTHER JURISDICTION WHERE, OR TO ANY OTHER PERSON TO WHOM, TO DO SO MIGHT CONSTITUTE A VIOLATION OR BREACH OF ANY APPLICABLE LAW OR REGULATION. PLEASE SEE THE IMPORTANT NOTICE AT THE END OF THIS ANNOUNCEMENT.

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF EU REGULATION 596/2014 WHICH FORMS PART OF DOMESTIC LAW IN THE UNITED KINGDOM BY VIRTUE OF THE EUROPEAN UNION (WITHDRAWAL) ACT 2018. UPON THE PUBLICATION OF THIS ANNOUNCEMENT THIS INSIDE INFORMATION IS NOW CONSIDERED TO BE WITHIN THE PUBLIC DOMAIN.

31 March 2026

Rosslyn Data Technologies plc

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

Result of Retail Offer

Rosslyn (AIM: RDT), the provider of a leading cloud-based enterprise data analytics platform, announces that, following the closing of the Retail Offer by BookBuild earlier today, 2,395,600 Retail Offer Shares will be issued at 2.0 pence per Retail Offer Share in connection with the Retail Offer.

Consequently, the Company has conditionally raised total gross proceeds of approximately £1.13 million pursuant to the Firm Placing, the Conditional Placing, the issue of the 2026 Convertible Loan Notes and the Retail Offer. The 7,399,000 new Ordinary Shares issued pursuant to the Firm Placing were admitted to trading on AIM at 8.00 a.m. today.

The Retail Offer, the Conditional Placing, the issue of the 2026 Convertible Loan Notes and the issue of the Fee Shares are conditional on, inter alia, the passing of the Resolutions by Shareholders at the General Meeting to be held on 13 April 2026.

Application will be made for the 36,516,451 new Ordinary Shares, comprising the Conditional Placing Shares, the Fee Shares and the Retail Offer Shares, to be admitted to trading on AIM. Subject to the Resolutions being passed by Shareholders at the General Meeting, it is expected that Second Admission to trading on AIM will occur no later than 8.00 a.m. on 14 April 2026.

Following Second Admission, the total number of Ordinary Shares in issue will be 117,902,876 with each Ordinary Share carrying the right to one vote. There are, and following Second Admission will be no Ordinary Shares held in treasury and therefore the total number of voting rights in the Company is expected to be 117,902,876. The above figure may be used by Shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company under the FCA's Disclosure, Guidance and Transparency Rules.

Capitalised terms used but not defined in this announcement have the same meanings as set out in the circular to Shareholders dated 26 March 2026.

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Important Notices

The content of this announcement, which has been prepared by and is the sole responsibility of the Company, has been approved by Cavendish Capital Markets Limited, which is authorised and regulated by the Financial Conduct Authority, solely for the purposes of section 21(2)(b) of the Financial Services and Markets Act 2000 (as amended).

This announcement and the information contained herein is not for release, publication or distribution, directly or indirectly, in whole or in part, in or into or from the United States (including its territories and possessions, any state of the United States and the District of Columbia (the "United States" or "US")), Australia, Canada, Japan, the Republic of South Africa, any member state of the EEA or any other jurisdiction where to do so might constitute a violation of the relevant laws or regulations of such jurisdiction.

The Retail Offer Shares have not been and will not be registered under the US Securities Act of 1933, as amended (the "US Securities Act") or under the applicable state securities laws of the United States and may not be offered or sold directly or indirectly in or into the United States or to or for the account or benefit of any US person (within the meaning of Regulation S under the US Securities Act) (a "US Person"). No public offering of the Retail Offer Shares is being made in the United States. The Retail Offer Shares are being offered and sold outside the United States in "offshore transactions", as defined in, and in compliance with, Regulation S under the US Securities Act. In addition, the Company has not been, and will not be, registered under the US Investment Company Act of 1940, as amended.

This announcement does not constitute an offer to sell or issue or a solicitation of an offer to buy or subscribe for Retail Offer Shares in the United States, Australia, Canada, New Zealand, Japan, the Republic of South Africa, any member state of the EEA or any other jurisdiction in which such offer or solicitation is or may be unlawful. No public offer of the securities referred to herein is being made in any such jurisdiction.

The distribution of this announcement may be restricted by law in certain jurisdictions and persons into whose possession any document or other information referred to herein comes should inform themselves about and observe any such restriction. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction.

Cavendish Capital Markets Limited is authorised and regulated in the United Kingdom by the Financial Conduct Authority, is acting exclusively for the Company and for no-one else and will not regard any other person (whether or not a recipient of this announcement) as its client in relation to the Retail Offer and will not be responsible to anyone other than the Company for providing the protections afforded to its clients, nor for providing advice in connection with the Retail Offer, Admission and the other arrangements referred to in this announcement.

The value of Ordinary Shares and the income from them is not guaranteed and can fall as well as rise due to stock market and currency movements. When you sell your investment, you may get back less than you originally invested. Figures refer to past performance and past performance is not a reliable indicator of future results. Returns may increase or decrease as a result of currency fluctuations.

Certain statements in this announcement are forward-looking statements which are based on the Company's expectations, intentions and projections regarding its future performance, anticipated events or trends and other matters that are not historical facts. These forward-looking statements, which may use words such as "aim", "anticipate", "believe", "intend", "estimate", "expect" and words of similar meaning, include all matters that are not historical facts. These forward-looking statements involve risks, assumptions and uncertainties that could cause the actual results of operations, financial condition, liquidity and dividend policy and the development of the industries in which the Company's businesses operate to differ materially from the impression created by the forward-looking statements. These statements are not guarantees of future performance and are subject to known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those expressed or implied by such forward-looking statements. Given those risks and uncertainties, prospective investors are cautioned not to place undue reliance on forward-looking statements.

These forward-looking statements speak only as at the date of this announcement and cannot be relied upon as a guide to future performance. Each of the Company and Cavendish Capital Markets Limited expressly disclaims any obligation or undertaking to update or revise any forward-looking statements contained herein to reflect actual results or any change in the assumptions, conditions or circumstances on which any such statements are based unless required to do so by the Financial Conduct Authority, the London Stock Exchange or applicable law.

The information in this announcement is for background purposes only and does not purport to be full or complete. None of Cavendish Capital Markets Limited or any of its respective affiliates, accepts any responsibility or liability whatsoever for, or makes any representation or warranty, express or implied, as to this announcement, including the truth, accuracy or completeness of the information in this announcement (or whether any information has been omitted from the announcement) or any other information relating to the Company or associated companies, whether written, oral or in a visual or electronic form, and howsoever transmitted or made available or for any loss howsoever arising from any use of the announcement or its contents or otherwise arising in connection therewith. Each of Cavendish Capital Markets Limited and its respective affiliates, accordingly disclaims all and any liability whether arising in tort, contract or otherwise which it might otherwise be found to have in respect of this announcement or its contents or otherwise arising in connection therewith.

Any indication in this announcement of the price at which the Ordinary Share have been bought or sold in the past cannot be relied upon as a guide to future performance. Persons needing advice should consult an independent financial adviser. No statement in this announcement is intended to be a profit forecast and no statement in this announcement should be interpreted to mean that earnings or target dividend per share of the Company for the current or future financial years would necessarily match or exceed the historical published earnings or dividends per share of the Company.

Neither the content of the Company's website (or any other website) nor the content of any website accessible from hyperlinks on the Company's website (or any other website) is incorporated into or forms part of this announcement. The Retail Offer Shares to be issued or sold pursuant to the Retail Offer will not be admitted to trading on any stock exchange other than the London Stock Exchange.