THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Supertex, Inc. (SUPX)

7/17/2006 Proxy Information

The Company leased a portion of a building, consisting of approximately 5,600 square feet at 1225 Bordeaux Drive, Sunnyvale, California under an operating lease from Fortuna Realty Co, a corporation owned by a former Supertex Director, Yunni Pao, who also owns Push Inc., a company which beneficially owns less than 10% of the Company’s Common Stock, as more fully set forth in the following page under “Securities Ownership of Certain Beneficial Owners and Management.” The lease will expire on April 1, 2007, which coincides with our Sublease Agreement with Reaction Technology, our epitaxial deposition service provider at essentially the same cost. Previously we leased the entire building, consisting of approximately 20,000 square feet. The total rental expenses paid to Fortuna Realty Co. were $125,000, $125,000, and $125,000 in fiscal years 2006, 2005 and 2004, respectively. We believe that the lease with Fortuna Realty Co. was and is at prevailing market rates.

7/22/2005 Proxy Information

The Company leased a portion of a building, consisting of approximately 5,600 sq. ft at 1225 Bordeaux Drive, Sunnyvale, California under an operating lease from Fortuna Realty Co, a corporation owned by a former Supertex Director, Yunni Pao, who also owns Push Inc., a company who beneficially owns more than 10% of the Company’s Common Stock, as more fully set forth in the following page under “Securities Ownership of Certain Beneficial Owners and Management.” The lease will expire on April 1, 2007, which coincides with our Sublease Agreement with Reaction Technology, our epitaxial deposition service provider at essentially the same cost. Previously we leased the entire building, consisting of approximately 20,000 sq.ft. The total rental expenses paid to Fortuna Realty Co. were $125,000, $125,000, and $130,000 in fiscal years 2005, 2004 and 2003, respectively. We believe that the lease with Fortuna Realty Co. was and is at prevailing market rates.

Mr. Richard Siegel, the Executive Vice President of the Company, is a member of the Board of Directors for All American Semiconductor. All American Semiconductor is a national distributor of electronic components manufactured by others and is a major distributor for Supertex. Sales to this distributor for fiscal years 2005, 2004, and 2003 were $2,183,000, $2,510,000, and $3,120,000, respectively. Supertex has no long-term distributorship agreement with All American Semiconductor, instead operating on the basis of purchase orders and sales order acknowledgements.

7/1/2004 Proxy Information

The Company leased a portion of a building, consisting of approximately 5,600 sq. ft at 1225 Bordeaux Drive, Sunnyvale, California under an operating lease from Fortuna Realty Co, a corporation owned by a former Supertex Director, Yunni Pao, who also owns Push Inc., a company who beneficially owns more than 5% of the Company's Common Stock, as more fully set forth in the following page under "Securities Ownership of Certain Beneficial Owners and Management." The lease will expire on April 1, 2007, which coincides with our Sublease Agreement with Reaction Technology, our epitaxial deposition service provider at essentially the same cost. Previously we leased the entire building, consisting of approximately 20,000 sq.ft. The total rental expenses paid to Fortuna Realty Co. were $125,000, $130,000, and $457,000 in fiscal years 2004, 2003 and 2002, respectively. We believe that the lease with Fortuna Realty Co. was and is at prevailing market rates.

Mr. Richard Siegel, the Executive Vice President of the Company, is a member of the Board of Directors for All American Semiconductor. All American Semiconductor is a national distributor of electronic components manufactured by others and is a major distributor for Supertex. Sales to this distributor for fiscal years 2004, 2003, and 2002 were $2,510,000, $3,120,000, and $2,109,000, respectively. Supertex has no long-term distributorship agreement with All American Semiconductor, instead operating on the basis of purchase orders and sales order acknowledgement.

6/30/2003 Proxy Information

The Company paid Elliott Schlam Associates $24,514 in consulting fees during the fiscal 2003. Elliott Schlam, one of the Company's directors, is the President of Elliott Schlam Associates. There is no long-term consulting contract between Mr. Schlam and the Company. Payment made to Mr. Schlam during the fiscal year 2003 represents consulting services rendered during the fiscal year.

The Company leased a portion of a building, consisting of approximately 5,600 sq. ft at 1225 Bordeaux Drive, Sunnyvale, California under an operating lease from Fortuna Realty Co, a corporation owned by a former Supertex Director, Yunni Pao, who beneficially owns more than 5% of the Company's Common Stock, as more fully set forth in the following page under "Securities Ownership of Certain Beneficial Owners and Management." The lease will expire on April 1, 2007, which coincides with our Sublease Agreement with Reaction Technology, our epitaxial deposition service provider at essentially the same cost. Previously we leased the entire building, consisting of approximately 20,000 sq.ft. The total rental expenses paid to Fortuna Realty Co. were $135,000, $457,000, and $408,000 in fiscal years 2003, 2002 and 2001, respectively. We believe that the lease with Fortuna Realty Co. was and is at prevailing market rates.

Richard Siegel, the Executive Vice President of the Company, is a member of the Board of Directors for All American Semiconductor. All American Semiconductor is a national distributor of electronic components manufactured by others and is a major distributor for Supertex. Sales to this distributor for fiscal years 2003, 2002, and 2001 were $3,120,267, $ 2,109,000, and $3,969,000, respectively. Supertex has no long-term distributorship agreement with All American Semiconductor, instead operating on the basis of purchase orders and sales order acknowledgements.