PGS ASA

Declaration of Voting Results & Voting Rights Announcements • May 30, 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

May, 30th 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 below the 5% reportable threshold in equity shares and crossed above the 5% reportable threshold in financial instruments 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: 29 th May 2024 Event triggering the notification: Disposal of equity shares and Acquisition of financial instruments Total new holding: 99,515,577 representing 10.42% of the 955,310,440 voting rights and of the share capital out of which 15,557,069 are held in shares equivalent to 1.63% and 83,958,508 equivalent to 8.79% 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 & UBS Europe SE. .

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 May 30th , 2024 Page 2 of 2

Yours faithfully,

UBS Group AG

Iwona Konwinska Sjoerd Sluimer

Associate Director Authorized Officer