Gulf Marine Services Regulatory News (GMS)

4 March 2026

Gulf Marine Services PLC

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

Regional Events

Gulf Marine Services ("GMS"), a leading provider of self-propelled, self-elevating support vessels to the offshore energy industry, has received instructions from a client in the Middle East, in response to the ongoing situation in the Gulf region, to immediately evacuate personnel from four vessels operating under its jurisdiction as a precautionary safety measure.

The safety of all personnel on board the Group's vessels remain, as always, the Company's highest priority, and accordingly, the Company confirms that it has complied promptly with these instructions.

GMS is continuing to monitor the situation closely and is currently working to quantify the potential impact of the recent developments on its operational and financial performance.

Further updates will be made, as appropriate, in due course.

This announcement contains inside information and is provided in accordance with the requirements of Article 17 of the Market Abuse Regulation (EU) No. 596/2014 (as it forms part of UK law by virtue of the European Union (Withdrawal) Act 2018, as amended).

?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 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.