24 April 2026

Gulf Marine Services PLC

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

Change of registered office address

The Company announces that with effect from 24 April 2026, the registered office of the Company has changed to Ground Floor, Heritage House, 2-14 Shortlands, London, W6 8DJ.

-ENDS-

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 selfpropulsion.

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