Subsea 7

Major Shareholding Notification • Sep 4, 2024

Subsea 7 S.A. notification of major holding

Luxembourg - 4 September 2024 - Subsea 7 S.A. (Oslo Børs: SUBC, ADR: SUBCY) today announced that, on 2 September 2024, Barclays Capital Securities Limited1 informed the Company that it had crossed thresholds provided for by Luxembourg's Transparency Law of 11 January 2008 on transparency requirements for issuers of securities as amended (the "Transparency Law") as follows:

• · On 28 August 2024 the total number of voting rights in the Company directly and indirectly attached to shares according to Article 8 and 9 was 439,965
• · On 28 August 2024 the total number of voting rights in the Company attached to financial instruments with similar economic effect according to Article 12 (1) (a) of the Transparency Law (right to recall) was 14,987,729
• · On 28 August 2024 the total number of voting rights in the Company attached to financial instruments with similar economic effect according to Article 12 (1) (b) of the Transparency Law (swaps) was 175,530
• · When combined, the above positions equated to 5.16% of voting rights of Subsea 7 S.A on 28 August 2024.

copy of the notifications received from Barclays is available on the Subsea7 website A www.subsea7.com.

1 A wholly-owned subsidiary of Barclays Plc

****************************************************************************************************************************************************************************** Subsea7 is a qlobal leader in the delivery of offshore projects and services for the evolving energy industry, and while 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

This information 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 4 September at 12:30 CET