Retail Offer

TERMS NOT OTHERWISE DEFINED HEREIN SHALL HAVE THE MEANINGS GIVEN TO THEM IN THE COMPANY'S ANNOUNCEMENT EARLIER RELEASED TODAY.

SRT MARINE SYSTEMS PLC

("SRT" or the "Company")

Retail Offer

The Board of SRT Marine Systems plc (the "Company") is pleased to announce a retail offer via the BookBuild Platform (the "Retail Offer") of up to 1,219,512 new ordinary shares of 0.1 pence each ("Ordinary Shares") in the capital of the Company (the "Retail Offer Shares") to raise up to £1.0 million at an issue price of 82.0 pence per New Ordinary Share (as defined below) (the "Issue Price").

In addition to the Retail Offer, the Company is also conducting a Placing and Subscription of new Ordinary Shares (the new Ordinary Shares to be issued pursuant to the Placing, the Subscription and the Retail Offer, together the "New Ordinary Shares") at the Issue Price (the "Placing", the "Subscription" and the Retail Offer together, the "Fundraising"). A separate announcement has been made regarding the Placing and Subscription and their terms. For the avoidance of doubt, the Retail Offer is not part of the Placing or Subscription.

The net proceeds of the Fundraising, including the Retail Offer, will be used by the Company to further strengthen its balance sheet, to accelerate product development and to support new contract conversion and delivery. Full details of the Fundraising, including the background to and reasons for the Placing, the Subscription and the Retail Offer are included in the separate announcement released by the Company earlier today.

The Issue Price represents a discount of approximately 5.75 per cent. to the closing share price of 87 pence per existing Ordinary Share on 10 April 2026.

The Retail Offer is conditional on, amongst other things, Admission. Admission of the Retail Offer Shares is expected to take place at 8:00 a.m. on 17 April 2026.

Expected Timetable in relation to the Retail Offer

Retail Offer

The Company values its retail shareholder base, which has supported the Company alongside institutional investors since IPO. Given the support of retail shareholders, the Company believes that it is appropriate to provide its retail shareholders in the United Kingdom the opportunity to participate in the Retail Offer. The Company is therefore making the Retail Offer available in the United Kingdom through the financial intermediaries which will be listed, subject to certain access restrictions, on the following website:

The Retail Offer will be open to eligible investors in the United Kingdom at 5:00 p.m. on 13 April 2026. The Retail Offer is expected to close at 12:00 p.m. on 15 April 2026. Investors should note that financial intermediaries may have earlier closing times. The Retail Offer may close early if it is oversubscribed.

If any Intermediary has any questions about how to participate in the Retail Offer on behalf of existing retail shareholders, please contact the Retail Offer Coordinator or the BookBuild Platform at email: support@bookbuild.live.

No offering document, prospectus or admission document has been or will be prepared or submitted to be approved by the Financial Conduct Authority (or any other authority) in relation to the Retail Offer, and investors' commitments will be made solely on the basis of the information contained in this announcement and information that has been published by or on behalf of the Company prior to the date of this announcement by notification to a Regulatory Information Service in accordance with the rules for AIM companies and their nominated advisers issued by the London Stock Exchange, the Financial Conduct Authority's Disclosure Guidance and Transparency Rules and the Market Abuse Regulation (EU Regulation No. 596/2014)as it forms part of United Kingdom law by virtue of the European Union (Withdrawal) Act 2018 (as amended).

There is a minimum subscription of £250.00 per investor under the terms of the Retail Offer which is open to investors in the United Kingdom subscribing via the intermediaries which will be listed, subject to certain access restrictions, on the following website:

Key Investment Risks

The potential gains and losses that may arise from your investments will depend on your appetite for risk and how you manage your approach to risk. Investing all your money into one type of investment can be a high-risk strategy and concentrate risks to which you and that type of investment may be exposed. A managed approach to risk may be to diversify the investments you make across different companies' securities and different asset classes.

Cavendish Capital Markets Limited ("Cavendish") acted as bookrunner in connection with the Placing.

UK Product Governance Requirements

EU Product Governance Requirements

Solely for the purposes of the product governance requirements contained in: (a) EU Directive 2014/65/EU on markets in financial instruments, as amended ("EU MiFID II"); (b) Articles 9 and 10 of Commission Delegated Directive (EU) 2017/593 supplementing EU MiFID II; and (c) local implementing measures (together, the "EU MiFID II Product Governance Requirements"), and disclaiming all and any liability, whether arising in tort, contract or otherwise, which any "manufacturer" (for the purposes of the EU MiFID II Product Governance Requirements) may otherwise have with respect thereto, the Retail Offer Shares have been subject to a product approval process, which has determined that the Retail Offer Shares are: (i) compatible with an end target market of retail investors and investors who meet the criteria of professional clients and eligible counterparties, each as defined in EU MiFID II; and (ii) eligible for distribution through all permitted distribution channels as are permitted by EU MiFID II (the "EU Target Market Assessment"). Notwithstanding the EU Target Market Assessment, distributors should note that: the price of the Retail Offer Shares may decline and investors could lose all or part of their investment; the Retail Offer Shares offer no guaranteed income and no capital protection; and an investment in the Retail Offer Shares is compatible only with investors who do not need a guaranteed income or capital protection, who (either alone or in conjunction with an appropriate financial or other adviser) are capable of evaluating the merits and risks of such an investment and who have sufficient resources to be able to bear any losses that may result therefrom. The EU Target Market Assessment is without prejudice to the requirements of any contractual, legal or regulatory selling restrictions in relation to the Retail Offer.

For the avoidance of doubt, the EU Target Market Assessment does not constitute: (a) an assessment of suitability or appropriateness for the purposes of EU MiFID II; or (b) a recommendation to any investor or group of investors to invest in, or purchase, or take any other action whatsoever with respect to the Retail Offer Shares. Each distributor is responsible for undertaking its own target market assessment in respect of the Retail Offer Shares and determining appropriate distribution channels.