PGS’ ordinary shares are listed in Norway on the Oslo Stock Exchange and trade on that exchange under the symbol “PGS”. In the U.S., PGS’ shares trade in the form of ADRs (American Depositary Receipts). An ADR is a U.S. certificate evidencing ownership of shares in a non-U.S. corporation. Each PGS ADR represents one share and carries the same shareholder rights pertaining to the underlying PGS shares. PGS’ ADRs are quoted in U.S. dollars on the New York Stock Exchange under the symbol “PGS”.

If you have any questions about your shareholding or if you require assistance (e.g., to notify a change of address), please contact the Petroleum Geo-Services registrar at the relevant address shown below. ADR holders should contact Citibank, N.A.; a member of Citigroup, also given below:

Registrar in Norway
DNB Bank ASA
Registrar Services
PO Box 1600 Sentrum
NO-0021 Oslo, Norway

Email: kua@dnb.no