POWER ONE INC

Q: Mar 31 2013

FY: Dec 30 2012

FY: Dec 30 2012

Q: Sep 30 2012

Q: Jul 1 2012

Q: Apr 1 2012

FY: Jan 1 2012

Q: Oct 2 2011

Q: Jul 3 2011

Q: Apr 3 2011

FY: Jan 2 2011

Q: Oct 3 2010

Q: Jul 4 2010

Q: Apr 4 2010

FY: Jan 3 2010

Q: Sep 27 2009

Q: Jun 28 2009

Q: Mar 29 2009

FY: Dec 28 2008

Q: Sep 28 2008

1.02,2.01,3.01,3.03,5.01,5.02,5.03,9.01

5.07,7.01,9.01

1.01,7.01,9.01

1.01,2.03,9.01

2.02,9.01

2.02,9.01

2.02,9.01

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

5.02

Submission of Matters to a Vote of Security Holders

2.02,9.01

2.02,9.01

Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement

2.02,9.01

7.01,9.01

5.07

2.02,9.01

5.07

2.02,9.01

8.01

Certification of termination of registration of a class of securities (Section 12(b))

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Notification of removal from listing and/or registration on a national securities exchange

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

No description available

No description available

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

No description available

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

none

POWER ONE INC

POWER ONE INC

WALTERS JAY

THOMPSON RICHARD J

MCKNIGHT TINA D

LEVRAN ALEXANDER

Hogge Steven D

Larsen Gary R

SHAH AJAY B

none

Ryland Kyle

SLTA Sumeru (GP), L.L.C.

none

Swanson Richard M

GACEK JON W

WALTERS JAY

LIEBEL HARTMUT

MELLIAR SMITH CHRISTOPHER MARK

Kambiz Hooshmand

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Entry into a Material Definitive Agreement

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

06,UL