THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Patterson Companies, Inc. (PDCO)

8/5/2005 Proxy Information

Peter L. Frechette was Chief Executive Officer from September 1982 through May 2005 and President from September 1982 to April 2003.

Mr. Ezerski served as Vice President, Treasurer and Chief Financial Officer of Patterson Companies, Inc. from December 1982 through July 1999.

David K. Beecken, one of our former directors, is the Managing Director of Beecken Petty O’Keefe & Company. Beecken Petty O’Keefe Fund II, a fund of Beecken Petty O’Keefe & Company, owns approximately twelve percent of Hygenic Corporation. During the fiscal year ended April 30, 2005, Hygenic Corporation sold approximately $3.5 million of rehabilitation products to AbilityOne, a subsidiary of our company. Such sales represent approximately eight percent of Hygenic Corporation’s annual sales.

8/6/2004 Proxy Information

On September 12, 2003, we completed our acquisition of AbilityOne Products Corp. Peter L. Frechette, our Chairman and Chief Executive Officer, and David K. Beecken, one of our directors and the Managing Director of Beecken Petty O’Keefe & Company, were direct and indirect owners of the stock of AbilityOne. Between May 2001 and March 2002, Mr. Frechette acquired a direct interest in AbilityOne’s common stock and Class A Preferred Stock and was granted an option to purchase common stock of AbilityOne. Such interests represented less than a one percent interest of each class of AbilityOne’s outstanding securities. Mr. Frechette also served as a member of AbilityOne’s board of directors until December 20, 2002. Between September 2000 and March 2002, HEP Investors I, LLC, an investment entity with which Beecken Petty O’Keefe & Company is affiliated, acquired AbilityOne’s common stock, Class A Preferred Stock and warrants for the purchase of AbilityOne’s common stock. Such interests represented an approximate twenty percent interest of each class of AbilityOne’s outstanding shares. In September 2000, Beecken Petty O’Keefe & Company was part of a group that purchased AbilityOne from BISSELL, Inc. A principal of Beecken Petty O’Keefe & Company had served on the board of directors of AbilityOne since 2000. Prior to consideration of the acquisition of AbilityOne, Mr. Frechette and Mr. Beecken fully disclosed their interests in AbilityOne to our board of directors and abstained from voting on the transaction. In connection with our acquisition of AbilityOne, we received a fairness opinion from Banc of America Securities LLC that the acquisition was fair to our company from a financial point of view.

David K. Beecken, one of our directors, is the Managing Director of Beecken Petty O’Keefe & Company. Beecken Petty O’Keefe Fund II, a fund of Beecken Petty O’Keefe & Company, owns approximately twelve percent of Hygenic Corporation. During the fiscal year ended April 24, 2004, Hygenic Corporation sold approximately $3 million of rehabilitation products to AbilityOne, a subsidiary of our company. Such sales represent approximately eight percent of Hygenic Corporation’s annual sales.

We have entered into employment agreements with R. Stephen Armstrong and Howard A. Schwartz.

Mr. Ezerski served as Vice President, Treasurer and Chief Financial Officer of Patterson Companies, Inc. from December 1982 through July 1999.

8/6/2003 Proxy Information

Mr. Ezerski previously served as Vice President, Treasurer and Chief Financial Officer of Patterson Dental Company.

Mr. Swanson is of counsel to the law firm of Briggs and Morgan, Professional Association. He was a practicing member of Briggs and Morgan from 1955 to 1995. Briggs and Morgan, Professional Association, is legal counsel to Patterson Dental Company.