X0202 4/A 2006-11-17 2006-11-21 0001100813 OPSWARE INC OPSW 0001166586 HOROWITZ BENJAMIN A C/O OPSWARE INC. 599 N MATHILDA AVENUE SUNNYVALE CA 94085 1 1 0 0 President and CEO Common Stock 2006-11-17 4 S 0 25000 D 3874450 I By Horowitz Family Trust Common Stock 2006-11-20 4 S 0 45600 D 3828850 I By Horowitz Family Trust No new transactions are being reported on this Form 4 amendment. The sole purpose of this amendment is to report that the sales listed on the Form 4 filed on 11/21/06 were done pursuant to a 10b5-1 trading plan adopted by the reporting person on March 20, 2006. /s/ Benjamin A. Horowitz 2006-11-21