TGS ASA — Director's Dealing 2018

Aug 24, 2018

Issue of shares following the vesting of 2015 Long Term Incentive Plan

Issue of shares following the vesting of 2015 Long Term Incentive Plan

ASKER, NORWAY (24 August 2018) - Following the registration of new shares

relating to the vesting of RSUs (Restricted Stock Units) as notified by Oslo

Stock Exchange on 22 August 2018, 98,800 new shares have been issued to 67

employees.

Primary insiders have been issued TGS shares related to the vesting of the RSUs

and have sold shares to cover tax withholding as follows:

Fredrik Amundsen has subscribed for 2,500 shares and retains 1,318 shares after

covering taxes (1,182 sold).

William Ashby has subscribed for 1,800 shares and retains 1,359 shares after

covering taxes (441 sold).

Victor Marchon has subscribed for 2,500 shares and retains 1,897 shares after

covering taxes (603 sold).

Amund Søia has subscribed for 1,480 shares and retains 780 shares after covering

taxes (700 sold).

Attached is the list of primary insiders who have been issued TGS shares in

relation to the vesting of the RSUs and their balance of TGS shares after sale

of shares to cover taxes.

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

SVP Investor Relations, HR & Communication

Tel: +1 713 860 2184

Email: will.ashby@tgs.com

This information is subject of the disclosure requirements pursuant to section

5-12 of the Norwegian Securities Trading Act.