Gulf Marine Services PLC

('Gulf Marine Services', 'GMS', the 'Company' or the 'Group')

Results of Annual General Meeting ("AGM")

The Company announces that at its Annual General Meeting held at Gulf Marine Services WLL, Office 403, International Tower, 24th (Karama) Street, Abu Dhabi, United Arab Emirates at 2.30pm (UAE time) today, all resolutions put before the meeting were duly passed.

Voting was conducted on a poll, the results of which are shown in the table below and will shortly be available on the Company's website, www.gmsplc.com.

Notes:

1)      Any proxy appointments giving discretion to the Chairman of the Meeting have been included in the "For" totals above.

2)      A vote "Withheld" is not a vote in law and is not counted in the calculation of the votes "For" or "Against" a resolution.

3)      Indicates special resolutions requiring a 75% majority of votes cast in favour to be passed.

The Company's total ordinary shares in issue (total voting rights) as at 18 June 2026 were 1,152,166,012 ordinary shares of 2 pence each. Ordinary shareholders are entitled to one vote per ordinary share held. No shares were held in treasury.

In accordance with UKLR 6.4.2R, copies of all resolutions passed at the AGM concerning items other than ordinary business have been submitted to the National Storage Mechanism and will shortly be available for inspection at: https://www.fca.org.uk/markets/primary-markets/regulatory-disclosures/national-storage-mechanism.

Enquiries:

Notes to Editors:

Gulf Marine Services PLC, a company listed on the London Stock Exchange, was founded in Abu Dhabi in 1977 and has become a world‐leading provider of advanced self‐propelled self‐elevating support vessels (SESVs). The fleet serves the offshore energy industries from its offices in the United Arab Emirates, Saudi Arabia, and Qatar. The Group's assets are capable of serving clients' requirements across the globe, including those in the Middle East, South East Asia, West Africa, North America, the Gulf of Mexico, and Europe.

The GMS fleet of 15 SESVs is amongst the youngest in the industry. The vessels support GMS's clients in a broad range of offshore platform refurbishment and maintenance activities, well intervention work, and offshore wind turbine maintenance work (which are opex‐led activities), as well as offshore platform installation and decommissioning and offshore wind turbine installation (which are capex‐led activities).

The SESVs are categorised by size ‐ K‐Class (Small), S‐Class (Mid), and E‐Class (Large) ‐ with these capable of operating in water depths of 45m to 80m depending on leg length. The vessels are four‐legged and are self-propelled, which means they do not require tugs or similar support vessels for moves between locations in the field; this makes them significantly more cost‐effective and time‐efficient than conventional offshore support vessels without self‐propulsion. They have a large deck space, crane capacity, and accommodation facilities (for up to 300 people) that can be adapted to the requirements of the Group's clients.

Gulf Marine Services PLC's Legal Entity Identifier is 213800IGS2QE89SAJF77

www.gmsplc.com

Disclaimer

The content of the Gulf Marine Services PLC website should not be considered to form a part of or be incorporated into this announcement.