X0202 4 2007-01-30 0 0001328650 Bronco Drilling Company, Inc. BRNC 0001048462 WEXFORD CAPITAL LLC 411 WEST PUTNAM AVE GREENWICH CT 06830 0 0 1 0 0001048485 JACOBS JOSEPH C/O WEXFORD CAPITAL LLC 411 WEST PUTNAM AVENUE GREENWICH CT 06830 0 0 1 0 0001001391 DAVIDSON CHARLES E C/O WEXFORD CAPITAL LLC 411 WEST PUTNAM AVENUE GREENWICH CT 06830 0 0 1 0 Common Stock, $0.01 par value 2007-01-30 4 S 0 108300 16.0241 D 4993624 I By Bronco Drilling Holdings, L.L.C. Common Stock, $0.01 par value 2007-01-31 4 S 0 100000 16.00 D 4893624 I By Bronco Drilling Holdings, L.L.C. Common Stock, $0.01 par value 2007-02-01 4 S 0 643830 16.1810 D 4249794 I By Bronco Drilling Holdings, L.L.C. These shares of common stock are owned directly by Bronco Drilling Holdings, L.L.C. (?Bronco Holdings?). Wexford Capital LLC (?Wexford?), as manager of Bronco Holdings, may be deemed to beneficially own all the shares of common stock which are owned by Bronco Holdings. Charles E. Davidson (?Davidson?) and Joseph M. Jacobs (?Jacobs ?) are the managing members of Wexford and as such may be deemed to beneficially own all the shares of common stock which are owned by Bronco Holdings. Wexford, Davidson and Jacobs each disclaim beneficial ownership of the securities reported hereby and this report shall not be deemed as an admission that they are the beneficial owners of such securities except in the case of Davidson and Jacobs to the extent of their interests in each member of Bronco Holdings. Arthur Amron, Partner and Secretary 2007-02-01 Joseph M. Jacobs 2007-02-01 Charles E. Davidson 2007-02-01