Subsea 7 S.A. Notification of major holding

Subsea 7 S.A. has received notification of transactions in its shares by a major shareholder. Please see the attachment for details. This information is pursuant to the EU Market Abuse Regulation and subject to the disclosure requirements pursuant to Section 5-12 of the Norwegian Securities Trading Act. Attachment Elliott 19 Sept 2025

Subsea 7 S.A. has received notification of transactions in its shares by a major shareholder. Please see the attachment for details. This information is pursuant to the EU Market Abuse Regulation and subject to the disclosure requirements pursuant to Section 5-12 of the Norwegian Securities Trading Act.

Attachment

• Elliott 19 Sept 2025