Share capital changes

Asker, Norway (15 May 2013) Following the stock option exercises as notified by
Oslo Stock Exchange on 13 May 2013, 5,000 new shares have now been registered in
the Company Register in Brønnøysund for exercises from the 2009 stock option
plans secured by warrants. 16,500 shares are transferred to cover the exercises
from the 2008 plan. The share capital of TGS is thereafter NOK 25,863,931.00
consisting of 103,455,724 shares at a nominal value of NOK 0.25 per share.
Following this transaction, TGS holds 1,229,200 of the issued shares as treasury
shares. This information is subject of the disclosure requirements pursuant to
section 5-12 of the Norwegian Securities Trading Act.


Company summary
TGS -NOPEC Geophysical Company (TGS) provides multi-client geoscience data to
oil and gas Exploration and Production companies worldwide.  In addition to
extensive global geophysical and geological data libraries that include multi-
client seismic data, magnetic and gravity data, digital well logs, production
data and directional surveys, TGS also offers advanced processing and imaging
services, interpretation products, permanent reservoir monitoring and data
integration solutions. For more information visit TGS online at www.tgs.com.
TGS-NOPEC Geophysical Company ASA is listed on the Oslo Stock Exchange
(OSLO:TGS).

For additional information about this news release please contact:

Kristian Johansen
Chief Financial Officer
Tel: +47 47 60 33 34
Email: kristian.johansen@tgs.com

Will Ashby
Director Investor Relations and M&A
Tel: +1 713 860 2184
Email: will.ashby@tgs.com
This information is subject of the disclosure requirements acc. to §5-12 vphl
(Norwegian Securities Trading Act)



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