PGS ASA

Major Shareholding Notification • Apr 26, 2024

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

Global Shareholder Reporting Group Compliance, Regulatory & Governance

Nemanja Pantic Max-Högger-Strasse 80, 8048 Zurich Tel. +41-44-239 62 08 nemanja-n.pantic@ubs.com

www.ubs.com

Registered Strictly confidential

Oslo Børs Box 460 Sentrum 0105 Oslo Norway

April, 26th 2024

PGS 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 above the 5% reportable threshold in equity shares of the voting rights and share capital in the issuer PGS ASA (NO0010199151). 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: 24th April 2024 Event triggering the notification: Acquisition of equity shares

Total new holding: 131,558,878 representing 13.77% of the 955,310,440 voting rights and of the share capital out of which 52,112,157 are held in shares equivalent to 5.45% and 79,446,721 equivalent to 8.32% held as financial instruments. The shares and financial instruments are held indirectly by UBS Group AG and directly by its subsidiaries: UBS AG, UBS Switzerland AG, UBS Asset Management (UK) Limited, UBS Fund Management (Switzerland) AG, Credit Suisse Funds AG.

This notification has also been sent to the Oslo Børs.

If you have any questions regarding this disclosure, please contact Sjoerd Sluimer on +41-44-235 11 50 in Zurich.

PGS ASA - Disclosure of large shareholdings April 26th , 2024 Page 2 of 2

Yours faithfully,

UBS Group AG

Konstantina Georgaki Sjoerd Sluimer Director Authorized Officer