TGS ASA

Major Shareholding Notification • Jul 10, 2024

UBS Group AG Postfach 8098 Zürich Tel. +41-44-438 11 11

Global Shareholder Reporting Group Compliance, Regulatory & Governance

www.ubs.com

Registered Strictly confidential

Oslo Børs Box 460 Sentrum 0105 Oslo Norway

July, 10th 2024

TGS ASA - Disclosure of large shareholdings under the Securities Trading Act

Dear Sir or Madam,

We would like to inform you that UBS Group AG has crossed below 5% of the voting rights and of the share capital in the issuer TGS ASA (NO0003078800) and thus we apply trading book exemption. Please let this serve you as our disclosure as set forth below:

Name of the person obliged to notify: UBS Group AG

Residing at: Bahnhofstrasse 45 CH-8001 Zurich Date of event: 9 th July 2024

.

Event triggering the notification: Disposal of equity shares

Total new holding: 1,254,901 representing 0.64% of the 196,273,293 voting rights and of the share capital out of which 1,026,483 are held in shares equivalent to 0.52% and 228,418 equivalent to 0.12% held as financial instruments. The shares are held indirectly by UBS Group AG and directly by its subsidiaries: UBS Asset Management (UK) Limited, UBS Fund Management (Switzerland) AG, UBS Asset Management Switzerland AG, UBS Fund Management (Luxembourg) S.A., UBS Asset Management (Deutschland) GmbH & UBS Asset Management (Singapore) Ltd.

This notification has also been sent to the issuer.

If you have any questions regarding this disclosure, please contact Iwona Konwinska on +41-44-239 80 05 in Zurich.

Yours faithfully,

UBS Group AG

Iwona Konwinska Sjoerd Sluimer Associate Director Authorized Officer