Petroleum Geo-Services ASA: APPROVAL AND PUBLICATION OF PROSPECTUS

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA OR JAPAN, OR ANY OTHER JURISDICTION IN WHICH THE RELEASE, PUBLICATION OR DISTRIBUTION WOULD BE UNLAWFUL. THIS ANNOUNCEMENT DOES NOT CONSTITUTE AN OFFER OF ANY OF THE SECURITIES DESCRIBED HEREIN.

PETROLEUM GEO-SERVICES ASA: APPROVAL AND PUBLICATION OF PROSPECTUS

Reference is made to the private placement in Petroleum Geo-Services ASA (the "Company") of 85,500,000 new shares, each with a par value of NOK 3.00, (the "New Shares") for gross proceeds of approximately NOK 1.9 billion (approximately USD 225 million) (the "Private Placement") and the subsequent offering (the "Subsequent Offering") of up to 13,500,000 new shares, each with a par value of NOK 3.00, (the "Offer Shares") for gross proceeds of approximately NOK 300 million (approximately USD 35 million).

The Norwegian Financial Supervisory Authority (Nw. Finanstilsynet) has approved the Company`s prospectus dated December 15, 2016 (the "Prospectus") prepared in connection with (i) the listing on Oslo Børs of the New Shares issued in the Private Placement and (ii) the Subsequent Offering and listing on Oslo Børs of up to 13,500,000 Offer Shares.

The New Shares will be delivered to the investors in the Private Placement on or about today, December 16, 2016 under the Company`s ISIN NO0010199151 and commence trading on Oslo Børs under the Company`s trading symbol "PGS" today, December 16, 2016.

The subscription period for the Subsequent Offering will commence at 09:00 hours (CET) on December 20, 2016 and expire at 16:30 hours (CET) on January 5, 2017.

Shareholders in the Company as of expiry of November 22, 2016 (as registered in the Norwegian Central Securities Depositary (Nw. Verdipapirsentralen) (the "VPS")) as of expiry of November 24, 2016 (the "Record Date")) who were not allocated New Shares in the Private Placement, and who are not resident in a jurisdiction where such offering would be unlawful or, for jurisdictions other than Norway, would require any prospectus, filing, registration or similar action ("Eligible Shareholder(s)"), will be allocated approximately 0.11214 non-tradable subscription rights, rounded down to the nearest whole subscription right. One (1) subscription right will give the right to subscribe for and be allocated, one (1) Offer Share in the Subsequent Offering. Oversubscription by Eligible Shareholders will be permitted, however, subscription without subscription rights will not be allowed.

Eligible Shareholders will receive a copy of the Prospectus together with a pre-filled subscription form. In order to subscribe for Offer Shares, Eligible Shareholders need to complete the subscription form and submit it to one of the subscription offices (as set out in the Prospectus) such that it is received within 16:30 hours (CET) on January 5, 2017, or may, for subscribers who are Norwegian residents with a Norwegian personal identification number, be made through the VPS online subscription system within the same time.