X0202 4 2004-10-29 0001042825 POWER ONE INC PWER 0001228228 BRADBURY CURTIS F JR 111 CENTER STREET LITTLE ROCK AR 72201 0 0 1 0 Common Stock 2004-10-29 4 J 0 57908 0 A 251851 I By LLC Common Stock 29936 D Common Stock 26414 I By Stephens Investment Partners 2000 LLC Common Stock 123267 I By Stephens Investment Partners 2001 LLC Common Stock 1000 I By spouse Common Stock 278049 I By voting trust Common Stock 5500 I By child Shares distributed by Power-One, Inc. to former shareholders of di/dt, Inc. Series A and Series B Preferred Stock pursuant to earnout provision of the merger agreement between Power-One, Inc. and di/dt, Inc. Reflects pro rata distribution of 1,491,830 shares from Stephens-di/dt LLC. Reporting person disclaims beneficial ownership of the reported securities except to the extent of reporting person's pecuniary interest therein. Reflects 29,936 shares received from Stephens-di/dt LLC as part of a pro rata distribution to members. Reflects 26,414 shares received from Stephens-di/dt LLC as part of a pro rata distribution to members. Reflects 123,267 shares received from Stephens-di/dt LLC as part of a pro rata distribution to members. Todd Ferguson, attorney in fact for reporting person 2004-11-02