X0306 4 2013-09-11 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 2013-09-11 4 S 0 500000 10.91 D 1136771 D Common Stock 300000 I Spouse The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.7650 to $11.04, inclusive. The reporting person undertakes to provide Kodiak Oil & Gas Corp. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, on request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. /s/ Sandra Oneil as attorney-in-fact for James E. Catlin 2013-09-13