X0203 3 2010-01-06 0 0001328650 Bronco Drilling Company, Inc. BRNC 0001480249 Porter Matthew S C/O BRONCO DRILLING COMPANY INC. 16217 NORTH MAY AVENUE EDMOND OK 73013 0 1 0 1 Chief Financial Officer Treasurer and Secretary Common Stock, par value $0.01 per share 15000 D Shares of restricted stock previously issued to the reporting person under the Bronco Drilling Company, Inc. 2006 Equity Incentive Plan. Of these shares, 10,000 will vest on February 25, 2010, and 5,000 will vest on February 25, 2011. /s/ Matthew S. Porter 2010-01-07