X0303 4 2010-05-12 0 0001034755 BRIGHAM EXPLORATION CO bexp 0001397449 Sigsbey Eric Eugene 6300 BRIDGE POINT PKWY, BLDG 2, STE 500 AUSTIN TX 78730 0 1 0 0 General Counsel Common Stock, par value $.01 2010-05-12 4 M 0 3000 5.08 A 8808 D Common Stock, par value $.01 2010-05-12 4 M 0 15000 6.1 A 23808 D Common Stock, par value $.01 2010-05-12 4 M 0 8000 2.2 A 31808 D Common Stock, par value $.01 2010-05-12 4 S 0 13000 18.65 D 18808 D Incentive Stock Options (right to buy) 5.08 2010-05-12 4 M 0 3000 0 D 2009-10-10 2015-10-10 Common Stock, par value $.01 3000 107000 D Incentive Stock Options (right to buy) 6.1 2010-05-12 4 M 0 15000 0 D 2010-04-23 2014-04-23 Common Stock, par value $.01 15000 92000 D Incentive Stock Options (right to buy) 2.2 2010-05-12 4 M 0 8000 0 D 2010-04-22 2019-04-22 Common Stock, par value $.01 8000 84000 D Employee incentive stock options granted pursuant to the Company's 1997 Incentive Plan. The stock options vest in 5 consecutive equal annual installments beginning on 10/10/2009, with the final vesting on 10/10/2013. This exercise is for the first vesting. These stock options expire seven years after the date of the grant. The stock options vest in 5 consecutive equal annual installments beginning on 04/23/2008, with the final vesting on 04/23/2012. This exercise is for the first three vestings. The stock options vest in 5 consecutive equal annual installments beginning on 04/22/2010, with the final vesting on 04/22/2014. This exercise is for the first vesting. These stock options expire ten years after the date of the grant. Eric E. Sigsbey 2010-05-14