X0303 4 2009-11-11 0 0001328650 Bronco Drilling Company, Inc. BRNC 0001372815 Hill Gary C C/O BRONCO DRILLING COMPANY, INC., 16217 NORTH MAY AVENUE EDMOND OK 73013 1 0 0 0 Common Stock 2009-11-11 4 S 0 7000 6.14 D 19240 D Sales made to generate proceeds for the Reporting Person to pay tax obligations resulting from the vesting of restricted shares of Bronco Drilling Company, Inc. common stock. Represents the weighted average price of the reporting person's disposition of 7,000 shares in transactions ranging from $6.11 to $6.15 per share. The reporting person undertakes to provide upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. /s/ Gary C. Hill 2009-11-12