Asker, Norway (20 May 2010) - Eight employees of TGS have today, 20 May,
exercised in total 92,500 stock options. Ninety thousand options were exercised
from the award in August 2005 secured by warrants at an exercise price of NOK
64.50 per share, and 2,500 options were exercised from the award in August 2008
secured by treasury shares at an exercise price of NOK 70.80 per share.
No primary insiders exercised options during this window.
This information is subject of the disclosure requirements acc. to §5-12 vphl
(Norwegian Securities Trading Act)