Luxembourg - 21 December 2020 - Subsea 7 S.A. (Oslo Børs: SUBC, ADR: SUBCY)
announces mandatory notification of the following share transaction by a primary
insider:

SIEM  INDUSTRIES S.A.  which is  represented on  the board  of Subsea  7 S.A. by
Kristian  Siem announces that it  has on 18 December 2020 delivered 487,600 SUBC
shares  under a  call option  agreement entered  into on 30 November 2020 with a
strike  price of  NOK 85 per  share.  Following this  transaction, the aggregate
number  of shares held by Siem Industries S.A. is 73,035,377. It has outstanding
sold put options for 1,693,000 SUBC shares.

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Subsea  7 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.

Subsea 7 is listed on the Oslo Børs (SUBC), ISIN LU0075646355, LEI
222100AIF0CBCY80AH62.

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Contact for investment community enquiries:
Katherine Tonks
Investor Relations Director
Tel +44 20 8210 5568
katherine.tonks@subsea7.com
www.subsea7.com

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