TGS ASA — Major Shareholding Notification 2014

Aug 18, 2014

Disclosure of large shareholdings (flagging)

Disclosure of large shareholdings (flagging)

Pursuant to the Norwegian disclosure and transparency

rules, I hereby report that the voting interest held

by APG Asset Management NV in shares of TGS Nopec

Geophysical Company ASA (ISIN: NO0003078800) exceeded

5% on August 14th 2014 and, according to our own

calculation, amounts to 5,201,932 shares -

representing 5.04% -as per this date.

We wish to inform you that APG Algemene Pensioen

Groep N.V. ("APG") has decided to split-off the asset

management activities. The entity that performs the

asset management activities is called APG Asset

Management N.V. ("APG AM"). The separation has been

effected by means of a split-off in accordance with

the provisions of Dutch law which implied that all

asset management activities transferred by operation

of law to APG AM. Contact person(s) and contact

details remain unchanged. This notification is made

on behalf of APG AM.