X0303 4 2009-07-10 0 0001342960 DIVX INC DIVX 0001126340 CREER FRANK 4780 EASTGATE MALL SAN DIEGO CA 92121 1 0 0 0 Common Stock 2009-07-10 4 S 0 20058 5.0159 D 35006 D Common Stock 384457 I by Partnership The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 9, 2009. This transaction was executed in multiple trades at prices ranging from $5.00 to $5.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, DivX, Inc. or a shareholder of DivX, Inc., full information regarding the number of shares and prices at which the transaction was effected. 264 shares were received 9/12/08 in a pro rata partnership distribution from Zone Venture Fund II, L.P.; 368 shares were received 9/12/08 in a pro rata partnership distribution from Zone Venture Fund II Annex, L.P.; 4,084 shares were received 9/12/08 in a pro rata partnership distribution from Zone Ventures Management Company II, LLC and 368 shares were received 11/13/08 in a pro rata partnership distribution from Zone Venture Fund II Annex, L.P. Includes 335,334 shares held by Zone Venture Fund II, L.P., 48,132 shares held by Zone Venture Fund II Annex, L.P. and 991 shares held by Zone Ventures Management Company II, LLC. Zone Ventures Management Company II, LLC is the general partner of Zone Venture Fund II, L.P. and Zone Venture Fund II Annex, L.P. Mr. Creer is a managing director of Zone Ventures Management Company II, LLC and shares voting and investment power with respect to the shares held by Zone Venture Fund II, L.P. and Zone Venture Fund II Annex, L.P. /s/Johnny Y. Chen, Attorney-in-fact 2009-07-14