TGS ASA — Major Shareholding Notification 2020

May 22, 2020

Declaration of Holdings- TGS NOPEC Geophysical Co ASA (ISIN: NO0003078800)

Declaration of Holdings- TGS NOPEC Geophysical Co ASA (ISIN: NO0003078800)

Schroders plc, hereby notifies you according to the Securities Trading Act that Schroders plc crossed below the 5% threshold in shares held with proxy voting in TGS NOPEC Geophysical Co ASA on the 20th May 2020.

The total number of shares held by Schroders plc as of 20th May 2020 was 5,971,230; which represented 5.022% of the total number of shares in issue, namely 118,906,778.

The total number of shares held with proxy voting as of 20th May 2020 was 5,888,974, which represented 4.953% of the total number of shares in issue, namely 118,906,778.

This disclosure obligation was triggered by a sale of 457,971 shares by Schroder Investment Management Limited on 20th May 2020.

The group’s position was held across two legal entities shown below:

Shares held with proxy voting:

Schroder Investment Management Limited 5,103,917 4.292%

Schroder Investment Management North America Limited 785,057 0.660%

Total number of shares held:

Schroder Investment Management Limited 5,180,458 4.357%

Schroder Investment Management North America Limited 790,772 0.665%

Chain of Controlled Undertakings:

Schroders plc is the parent company of Schroder Administration Limited, which is the parent company of Schroder International Holdings Limited.

Schroder International Holdings Limited is the parent company of Schroder Investment Management Limited which is a discretionary fund manager holding shares indirectly on behalf of its clients with power to exercise voting rights.

Schroder Investment Management Limited is the parent company of Schroder Investment Management North America Limited which is a discretionary fund manager holding shares indirectly on behalf of its clients with power to exercise voting rights.