X0303 4/A 2009-08-19 2009-08-21 1 0001328650 Bronco Drilling Company, Inc. BRNC 0001048462 WEXFORD CAPITAL LP 411 WEST PUTNAM AVENUE SUITE 125 GREENWICH CT 06830 0 0 0 1 No longer 10% filer. 0001001391 DAVIDSON CHARLES E C/O WEXFORD CAPITAL LP 411 WEST PUTNAM AVE. GREENWICH CT 06830 0 0 1 0 0001048485 JACOBS JOSEPH C/O WEXFORD CAPITAL LP 411 WEST PUTNAM AVE. GREENWICH CT 06830 1 0 0 0 The box indicating that we are no longer subject to Section 16 was inadvertently left unchecked in the filing made on August 21, 2009. Charles E. Davidson 2009-08-24 Joseph M. Jacobs 2009-08-24 Jay Maymudes, Partner and CFO of Wexford Capital LP 2009-08-24