TGS ASA

TGS - Notice of Extraordinary General Meeting

OSLO, Norway (30 October 2023) - Reference is made to the joint announcement on

25 October 2023 made by TGS ASA ("TGS" or the "Company," OSE: TGS) and PGS ASA

("PGS", OSE: PGS) regarding the approval and decision by their respective board

of directors upon a definitive merger agreement. An extraordinary general

meeting of TGS (the "EGM") will be held on 1 December 2023 to approve the merger

with PGS. The EGM will be held as a virtual meeting through the facilities of

Lumi at 16:00 hours (Oslo time).

The notice for the EGM is attached hereto (English and Norwegian), together with

relevant appendices. The notice will be sent to all registered shareholders on

30 October 2023.

To register your attendance, grant proxy or cast votes electronically in advance

through VPS Investor Services, please copy and paste this link into your

browser: https://www.tgs.com/investor-center

The pin code and reference number, which are sent out with the notice, will be

needed. Shareholders that have received the notice electronically will find

information by logging in through VPS Investor Services, available at

https://www.euronextvps.no/ or through their own account keeper (bank/broker).

For more information, visit TGS.com (https://www.tgs.com), email

Sven Børre Larsen

CFO

Tel: +47 909 43 673

AI Terminal