X0303 4 2010-08-06 0 0000868611 SONIC CORP SONC 0001275331 BENHAM DOUGLAS N 300 JOHNNY BENCH DRIVE OKLAHOMA CITY OK 73104 1 0 0 0 Common Stock 2010-08-06 4 M 0 4356 0 A 11856 D Restricted Stock Units 0 2010-08-06 4 M 0 4356 0 D Common Stock 4356 8710 D Represents shares that vested in accordance with the terms of Restricted Stock Units granted August 6, 2010, providing for vesting of Restricted Stock Units in equal annual installments on each of the first three anniversaries following the date of grant. One-third of the total number of Restricted Stock Units granted will vest on each of the first three anniversary dates following the date of grant and will be issued in shares of Sonic Corp. common stock on a one-for-one basis, subject to certain restrictions. /s/ Carolyn C. Cummins for Douglas N. Benham 2010-08-09