Subsea 7 S.A. mandatory notification of share trades

Luxembourg - 10 May 2019 - Subsea 7 S.A. (Oslo Børs: SUBC, ADR: SUBCY) announces
mandatory notification of the following share transaction by a primary insider:

+-----------------------------------------------------------+
| PURCHASE OF SHARES |
+-----------------------------+-----------------------------+
| Name of Primary Insider | Siem Industries Inc. |
|   | |
+-----------------------------+-----------------------------+
| Position in Subsea 7 SA | Shareholder/Primary insider |
|   | |
+-----------------------------+-----------------------------+
| Date of Transaction | 10 May 2019 |
|   | |
+-----------------------------+-----------------------------+
| Type of Transaction | Market purchase |
|   | |
+-----------------------------+-----------------------------+
| Type of Security traded | Shares |
|   | |
+-----------------------------+-----------------------------+
| Number of shares transacted | 1,981,046 |
|   | |
+-----------------------------+-----------------------------+
| Price at transaction date | NOK 105.7011 |
|   | |
+-----------------------------+-----------------------------+


+---------------------------------------------------------------------------+
|AFTER THIS NOTIFICATION |
+----------------------------------------------+----------------------------+
| | * Owned Shares: 71,712,977|
| | * Performance Shares: Nil |
|Number of Shares owned by Primary Insider | * Restricted Shares: Nil |
+----------------------------------------------+----------------------------+
|Number of options available to Primary Insider| * Options: Nil |
+----------------------------------------------+----------------------------+

Contact for investment community enquiries:
Isabel Green
Investor Relations Director
Tel +44 20 8210 5568
isabel.green@subsea7.com
www.subsea7.com