X0306 4 2013-12-26 0 0001322866 Kodiak Oil & Gas Corp KOG 0001400706 Henderson James P 1625 BROADWAY, SUITE 250 DENVER CO 80202 0 1 0 0 CFO/Secretary/Treasurer Common Stock 2013-12-26 4 S 0 36450 11.213 D 440241 D Common Stock 2013-12-27 4 S 0 63550 11.270 D 376691 D Common Stock 2013-12-30 4 F 0 11911 12.63 D 364780 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.20 to $11.292, inclusive. The reporting person undertakes to provide to Kodiak Oil & Gas Corp., any security holder of Kodiak Oil & Gas Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (3) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.30 to $11.33, inclusive. Withholding of shares for tax withholding purposes. /s/ James P. Henderson 2013-12-30