X0306 4 2012-08-15 0 0001322866 Kodiak Oil & Gas Corp KOG 0001394697 Catlin James E 1625 BROADWAY, SUITE 250 DENVER CO 80202 1 1 0 0 Exec VP, Business Development Common Stock 2012-08-15 4 M 0 75000 1.18 A 1685150 D Common Stock 2012-08-15 4 S 0 5247 9.00 D 1679903 D Common Stock 2012-08-16 4 S 0 69753 9.0018 D 1610150 D Common Stock 500000 I Spouse Employee Stock Option 1.18 2012-08-15 4 M 0 75000 0 D 2010-03-20 2014-12-31 Common Stock 75000 148469 D The transaction reported on this Form 4 was made pursuant to a trading plan meeting the requirements of Rule 10b5-1 promulgated under the Securities Act of 1934, as amended. The price reported is the average weighted sales price; the individual sales prices ranged from $9.00 to $9.0101. The undersigned will undertake to provide upon request a detailed breakout of the pricing. /s/ James E. Catlin 2012-08-17