X0303 4 2010-02-26 0 0001308547 Dolby Laboratories, Inc. DLB 0001250877 JASPER N WILLIAM JR C/O DOLBY LABORATORIES, INC. 100 POTRERO AVENUE SAN FRANCISCO CA 94103 1 0 0 0 Class A Common Stock 2010-02-26 4 C 0 10000 0 A 10000 I By N. William Jasper, Jr. 2004 Irrevocable Trust Class A Common Stock 2010-02-26 4 S 0 10000 51.45 D 0 I By N. William Jasper, Jr. 2004 Irrevocable Trust Class A Common Stock 32744 D Class B Common Stock 0 2010-02-26 4 C 0 10000 0 D Class A Common Stock 10000 10000 I By N. William Jasper, Jr. 2004 Irrevocable Trust Class B Common Stock 0 Class A Common Stock 20000 20000 I By Kriisten L. McFarland 2004 Irrevocable Trust Class B Common Stock 0 Class A Common Stock 50000 50000 D Each share of Class A Common Stock issued upon conversion of one share of Class B Common Stock at the election of the reporting person. This transaction was executed in multiple trades at prices ranging from $51.303 to $51.68. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transactions were effected. Shares held following the reported transactions, but none of the shares reported as sold, include 27,500 restricted stock units, which are subject to forfeiture until they vest. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date. ***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 2010-03-01