THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Power-One, Inc. (PWER)

3/17/2006 Proxy Information

Steven J. Goldman was Chief Executive Officer of Power-One from 1990 until February 2006 and President from 1990 to 2000.

Mr. Jacoby, who is a member of the Board of Directors and the Compensation Committee, serves as a director of Stephens Group Inc., our largest stockholder, and the parent corporation of Stephens Inc., a financial advisor to us and an affiliate of Stephens Group Inc. During the 2005 fiscal year, we did not pay Stephens Inc. any amounts for financial advisory services. We expect to pay Stephens Inc. for financial advisory services that it has performed or may perform for us during 2006.

Mr. Bishop, who is a member of the Board of Directors, the Audit Committee and the Nominating and Corporate Governance Committee, is a retired partner from the law firm of O'Melveny & Myers LLP. O'Melveny & Myers LLP has performed legal services for the Company in the past and is expected to do so in the future. Since January 2002, Mr. Bishop has not provided legal services to Power-One, or participated directly or indirectly in any allocation of firm income or profits relating to any services provided to the Company. All legal services provided to Power-One by the law firm since January 2002 have been provided exclusively by other members of the firm.

Several of our executive officers maintain individual brokerage accounts with Stephens Inc. In addition, from time to time Stephens Group Inc. has made opportunities available to Mr. Goldman to invest in various private partnerships. None of Mr. Goldman's investments made in these circumstances via the Stephens Group Inc., individually or in the aggregate, have been material to him.

Mr. Godfrey owns a minority interest in a hotel property in the Dominican Republic that is used periodically by our employees while they are on business for us in the Dominican Republic. Rates charged by this hotel are competitive with other comparable commercial lodging in the area. Mr. Godfrey has no control or influence over our choice of lodging for our employees or over the rates charged by the hotel. The amount spent during the fiscal year ending December 31, 2005 relating to use of this property by our employees while on business for us in the Dominican Republic was not material to the Company or to the hotel property.

3/28/2005 Proxy Information

O'Melveny & Myers LLP has performed legal services for the Company in the past, and is expected to do so in the future. Mr. Bishop has not provided or participated in any legal services to Power-One since July 31, 2003 and provided only de minimis (less than 15 hours) legal services between January and July 30, 2003.

Donna Schnopp (Koep), Senior Vice President, Human Resources and Eddie K. Schnopp, Senior Vice President-Finance, Treasurer and Chief Financial Officer are married.

Mr. Jacoby, who is a member of the Board of Directors and the Compensation Committee, serves as a director of Stephens Group Inc., our largest stockholder, and the parent corporation of Stephens Inc., a financial advisor to us and an affiliate of Stephens Group Inc. During the 2004 fiscal year, we did not pay Stephens Inc. any amounts for financial advisory services. We expect to pay Stephens Inc. for additional financial advisory services that it has or may perform for us during 2005. All compensation paid to Stephens Inc. has been on terms that we believe to be fair and reasonable for the services performed.

Several of our executive officers maintain individual brokerage accounts with Stephens Inc. In addition, from time to time Stephens Group Inc. has made opportunities available to Mr. Goldman to invest in various private partnerships. None of Mr. Goldman's investments made in these circumstances via the Stephens Group Inc., individually or in the aggregate, have been material to him.

3/26/2004 Proxy Information

Donna Schnopp (Koep), Senior Vice President, Human Resources and Eddie K. Schnopp, Senior Vice President-Finance, Treasurer and Chief Financial Officer are married.

Mr. Jacoby, who is a member of the Board of Directors and the Compensation Committee, serves as a director of Stephens Group Inc., our largest stockholder, and the parent corporation of Stephens Inc., a financial advisor to us and an affiliate of Stephens Group Inc. During the fiscal year, we paid Stephens Inc. $15,200 for financial advisory services. We expect to pay Stephens Inc. for additional financial advisory services that it has or may perform for us during 2004. All compensation paid to Stephens Inc. has been on terms that we believe to be fair and reasonable for the services performed.

Several of our executive officers maintain individual brokerage accounts with Stephens Inc. In addition, from time to time Stephens Group Inc. has made opportunities available to Mr. Goldman to invest in various private partnerships. None of Mr. Goldman's investments made in these circumstances via the Stephens Group Inc., individually or in the aggregate, have been material to him.

4/1/2003 Proxy Information

We have made certain loans to Mr. Yeates in connection with his initial employment which commenced in January, 2000. These loans were in existence prior to the passage of the Sarbanes-Oxley Act of 2002 (the "Act"). The Act now prohibits loans by the Corporation to its executive officers. However, loans in existence as of the effective date of the Act were exempted from the prohibitions of the Act.

One non-interest-bearing loan in the amount of $100,000, plus additional non-interest-bearing loans relating to new hire relocation expenses totaling approximately $80,000, were forgiven on the third anniversary of Mr. Yeates' hire (i.e. on January 13, 2003). These loans related to amounts advanced to Mr. Yeates in connection with commencement of employment and relocation, and were forgiven per the original terms of the loan arrangements, specifically Mr. Yeates' continued employment with the Corporation as of January 13, 2003. A separate loan in the amount of $660,000 remains outstanding, bears interest at the rate of 5.5% per annum and is due and payable on January 13, 2004 per its original terms. There has been no material modification of any term of this loan, nor renewal of this loan, after the effective date of the Act.