Mandatory Notification of Trade

Please find attached notifications of trade by a company closely associated with a primary insider, pursuant to article 19 of the EU Market Abuse Regulation.

The trade was completed on 28 October 2025, pursuant to an order placed late September 2025. The order should have been withdrawn, and the trade was reversed by a sale of a corresponding number of shares the same day.

For more information please contact: Arne Joa, Chief Financial Officer Reach Subsea ASA +47 474 51 344 investors@reachsubsea.com About Reach Subsea

Reach Subsea delivers its services through a versatile fleet of vessels, including survey, IMR, construction support, and remote vessels. Our teams operate worldwide, providing inspection, maintenance, construction support, survey and data services across multiple industries, supporting clients throughout every stage of their project lifecycles. Our offshore teams are powered by advanced ROV technology and backed by onshore engineering expertise, turning complex ocean challenges into reliable solutions. With over 500 skilled professionals and offices in Norway, Sweden, the UK, the US, Brazil, Trinidad, Australia, and Singapore, our vision—'Sustainable access to ocean space’—drives safe, innovative, and sustainable subsea operations.

This stock exchange announcement was published by Arne Joa, Chief Financial Officer at Reach Subsea ASA on the time and date provided

This information is subject to the disclosure requirements pursuant to article 19 of the EU Market Abuse Regulation and section 5-12 of the Norwegian Securities Trading Act.