X0303 4 2010-02-25 0 0001308547 Dolby Laboratories, Inc. DLB 0001269691 DONATIELLO NICHOLAS JR C/O DOLBY LABORATORIES, INC. 100 POTRERO AVENUE SAN FRANCISCO CA 94103 1 0 0 0 Class A Common Stock 2010-02-25 4 S 0 3333 51.74 D 26667 D Shares held following the reported transactions include 23,334 restricted stock units, which are subject to forfeiture until they vest. ***All of the sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.*** /s/ Alan G. Smith, Attorney-in-fact 2010-02-26