Mandatory notification of trade

The following primary insiders in Det norske oljeselskap ASA (OSE ticker: DETNOR) acquired on 22 of May 2009 shares in the company at an average share price of NOK 55,84 per share. The acquisition of shares has been made as part of DETNORs share bonus program for all employees. The enclosure shows the number of shares acquired and the new shareholding of the primary insiders owned privately, in a separate company or a combination thereof.