TGS ASA — Director's Dealing 2017

Nov 9, 2017

TGS: Stock Options Exercised

TGS: Stock Options Exercised

ASKER, NORWAY (9 November 2017) - 22 option holders have today, exercised in

total 176,850 stock options. All the options were exercised from the award in

August 2013 secured by warrants at an exercise price of NOK 181.90 per share.

The following primary insiders in TGS have on 9 November 2017 traded TGS shares

related to their exercise of stock options:

Kristian Johansen, CEO, has exercised 12,500 stock options and sold 8,000 shares

in TGS at an average price of NOK 193.47 per share. After this transaction,

Kristian Johansen holds 20,200 shares in TGS.

Knut Agersborg, VP Global Services, has exercised 20,000 stock options and sold

19,000 shares in TGS at an average price of NOK 193.47 per share. After this

transaction, Knut Agersborg holds 4,700 shares in TGS.

John Adamick, SVP Data & Analytics, has exercised 20,000 stock options and sold

the same number of shares in TGS at an average price of NOK 193.47 per share.

After this transaction, John Adamick holds 38,500 shares in TGS.

Katja Akentieva, SVP Onshore & GPS, has exercised 10,100 stock options and sold

9,600 shares in TGS at an average price of NOK 193.47 per share. After this

transaction, Katja Akentieva holds 2,500 shares in TGS.

Tom Neugebauer, Director of Project Development NSA, has exercised 5,100 stock

options and sold the same number of shares in TGS at an average price of NOK

193.47 per share. Tom Neugebauer does not hold any shares in TGS.

Linda Santiago, Director of Sales NSA, has exercised 10,100 stock options and

sold the same number of shares in TGS at an average price of NOK 193.47 per

share. Linda Santiago does not hold any shares in TGS.

Attached is the list of the primary insiders exercising stock options.

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.

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 principal 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).