TGS ASA — Director's Dealing 2017

Mar 10, 2017

TGS : Mandatory Notification of Trade

TGS : Mandatory Notification of Trade

ASKER, NORWAY (10 March 2017) - Two primary insiders have on 10 March 2017

bought shares in TGS-NOPEC Geophysical Company ASA ('TGS').

Zhiming Li, Senior VP Imaging Services, has bought 2,800 shares in TGS at a

price of NOK 186.05 per share.  Following this transaction, Mr Li holds 108,494

shares, 20,000 stock options and 38,000 Performance Share Units in TGS.

Tana Pool, VP General Counsel and Corporate Secretary, has bought 1,575 shares

in TGS at a price of NOK 184.19 per share.  Following this transaction, Ms Pool

holds 1,575 shares and 35,000 Performance Share Units in TGS.

Attached is the list of primary insiders who bought TGS shares today.

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, and data integration solutions.

For more information visit TGS online at www.tgs.com.

Forward-looking statements and contact information

All statements in this press release other than statements of historical fact

are forward-looking statements, which are subject to a number of risks,

uncertainties and assumptions that are difficult to predict, and are based upon

assumptions as to future events that may not prove accurate. These factors

include TGS' reliance on a cyclical industry and principle customers, TGS'

ability to continue to expand markets for licensing of data, and TGS' ability to

acquire and process data products at costs commensurate with profitability.

Actual results may differ materially from those expected or projected in the

forward-looking statements. TGS undertakes no responsibility or obligation to

update or alter forward-looking statements for any reason.

TGS-NOPEC Geophysical Company ASA is listed on the Oslo Stock Exchange

(OSLO:TGS). TGS sponsored American Depositary Shares trade on the U.S. over-the-

counter market under the symbol "TGSGY".

For additional information about this press release please contact:

Sven Børre Larsen

Chief Financial Officer

Tel: +47 90 94 36 73

Email: sven.larsen@tgs.com

Will Ashby

VP HR & Communication

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)