X0202 4 2004-06-25 1 0000889005 WESTPORT RESOURCES CORP /NV/ WRC 0001237285 MUELLER PETER M 1670 BROADWAY, SUITE 2800 DENVER CO 80202 0 1 0 0 VP & GM Northern Division Common Stock 2004-06-25 4 D 0 7720 D 0 D Stock Option (Right to Buy) 23.32 2004-06-25 4 D 0 20000 D 2013-06-09 Common Stock 20000 0 D Stock Option (Right to Buy) 31.86 2004-06-25 4 D 0 14301 D 2014-03-15 Common Stock 14301 0 D The restrictions on these shares lapsed at the effective time of the merger pursuant to an Agreement and Plan of Merger, dated as of April 6, 2004 between Kerr-McGee Corporation ("KMG") and the issuer (the "Merger Agreement"). Disposed of pursuant to the Merger Agreement whereby each share of issuer is to be exchanged for 0.71 shares of KMG. This option, which originally provided for vesting in three equal annual installments beginning June 9, 2004, is now immediately exercisable, and has been assumed by KMG in the merger and replaced with an option to purchase 0.71 shares of KMG for every one share of issuer at a price equal to $32.85. This option, which originally provided for vesting in three equal annual installments beginning March 15, 2005, is now immediately exercisable, and has been assumed by KMG in the merger and replaced with an option to purchase 0.71 shares of KMG for every one share of issuer at a price equal to $44.87. The term during which this option can be exercised following termination of employment or service as a director of issuer was extended to the earlier of (i) the expiration of the original term of each such outstanding option and (ii) four years from the date of the individual's termination of employment or service as a director of issuer. Howard L. Boigon as Attorney-in-Fact 2004-06-25