Disclosure

Disclosure notification by Egerton Capital Limited
Partnership on behalf of the following funds under
our management:

1. The Egerton European Equity Fund Limited
("EEEF");
2. The Egerton European Dollar Fund Limited
("EEDF");
3. Egerton Capital Partners, L.P. ("ECP");
4. The Egerton Euro Investment Fund Limited
("EEIF");
5. The Egerton Dollar Investment Fund Limited
("EDIF");
6. Egerton Investment Partners, L.P. ("EIP");
7. Egerton Capital European Fund plc ("ECEF");
8. CF Egerton Sterling Investment Fund ("ESIF");
9. Schroder GAIA Egerton European Equity
("SGEEE"); and
10. Egerton ELS Master Fund Limited ("EELSMF").

Name of person/party: Egerton Capital Limited
Partnership

Background for the notification: Holding reduced
following notification of exceeding 5% level

Name of issuer: TGS Nopec Geophysical Company ASA

Description of the financial instrument: Equity

Type of transaction: Sell

Timing and market for the transaction:
Date: 14 April 2011
Time: 16.30, UK time
The following Markets/Stock Exchanges were used:
BATS, Chi-X, Turquoise and Oslo Stock Exchange

Price and volume of the transaction:
Gross price: NOK 137.6378
Quantity (Volume): 420,000

Holding after the transaction (number of shares and %
holding on aggregated basis):
Number of shares: 4,798,985
Percentage holding: 4.618%