Subsea 7 S.A. - 3Q25 earnings call notification

Luxembourg - 13 October 2025 - Subsea 7 S.A. (Oslo Børs: SUBC, ADR: SUBCY) will publish its third quarter 2025 results for the period ended 30 September 2025 on Thursday 20 November 2025 at 08:00 CET.

A conference call and simultaneous webcast for the investment community will be held on Thursday 20 November 2025 at 12:00 UK / 13:00 CET.

From 08:00 CET the results announcement and the presentation to be reviewed during the conference call and webcast will be available on the Subsea7 website: www.Subsea7.com (https://www.subsea7.com/en/investors/results-reports-and- presentations/conference-call-and-webcast.html)

Conference call registration:

Phone:         https://register-conf.media- server.com/register/BI0e0631b7e1de4c3eaf839db3bd00a6b6 Webcast:     https://edge.media-server.com/mmc/p/8qhn7ef3/

Please note that questions can only be submitted from a phone line.

******************************************************************************* Subsea7 creates sustainable value by delivering the offshore energy transition solutions the world needs.

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

******************************************************************************* Contact for investor enquiries: Katherine Tonks Head of Investor Relations Subsea 7 S.A. Tel +44 20 8210 5568 ir@subsea7.com

www.subsea7.com (http://www.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 13 October 2025 at 13:10 CET.