Subsea 7

Earnings Release • Dec 16, 2025

Subsea 7 - Awarded contract offshore Australia

Luxembourg –16 December 2025 - Subsea 7 S.A. (Oslo Børs: SUBC, ADR: SUBCY) today announced a substantial award by Chevron Australia. The contract covers subsea installation on the Gorgon Stage 3 (GS3) Project, offshore Australia.

Subsea7's scope of work includes project management, engineering, procurement, fabrication, transportation, installation and precommissioning of subsea equipment and associated infrastructure at GS3, at 1,350m water depth.

Project management and engineering work will commence immediately from Subsea7's office in Perth, Australia with support from colleagues in Kuala Lumpur, Malaysia; and Paris, France. Offshore operations are expected in 2028.

David Bertin, Senior Vice President for Subsea7 Global Projects Centre East, said: "This project marks an important milestone and reinforces our long-term strategic engagement with Chevron.

"Building on our local and international capability and experience, we look forward to working collaboratively with Chevron Australia – focusing on safety and quality to optimise reliability, technical integrity and offshore operations – to successfully deliver the Gorgon Stage 3 subsea installation."

1. Subsea7 defines a substantial contract as being between \$150 million and \$300 million

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Subsea7 is a global leader in the delivery of offshore projects and services for the evolving energy industry, creating sustainable value by being the industry's partner and employer of choice in delivering the efficient offshore solutions the world needs.

Subsea7 is listed on the Oslo Børs (SUBC), ISIN LU0075646355, LEI 222100AIF0CBCY80AH62.

Contact for investment community enquiries:

Katherine Tonks Investor Relations Director Tel +44 20 8210 5568 ir@subsea7.com

Contact for media enquiries:

Hariom Cavalcante
Communication Manager
Tel +33 01 4097 4208
hariom.cavalcante@Subsea7.com

www.subsea7.com

This information is considered to be inside information pursuant to the EU Market Abuse Regulation and is subject to the disclosure requirements pursuant to Section 5-12 the Norwegian Securities Trading Act.

This stock exchange release was published by Katherine Tonks, Investor Relations, Subsea7, on 16 December 2025 at 12:00 CET.