TGS ASA — Director's Dealing 2017

Feb 20, 2017

Mandatory Notification of Trade

Mandatory Notification of Trade

ASKER, NORWAY (20 February 2017) Knut Agersborg, VP

Operations, on 17 February 2017 bought 1,100 shares in

TGS-NOPEC Geophysical Company ASA ('TGS') at a price

of NOK 189.2345 per share. Following this transaction,

Mr. Agersborg holds 3,200 shares, 31,000 stock options

and 35,000 Performance Share Units in TGS.

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