THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Benchmark Electronics, Inc. (BHE)

4/1/2005 and 4/12/2006 Proxy Information

Mr. Nigbor has been Chairman of Benchmark Electronics, Inc. since May 2001 and served as Chief Executive Officer from May 2001 to September 2004.

4/1/2004 Proxy Information

The Company leases from David H. Arnold, a director of the Company, his spouse and certain other persons the real estate and buildings in Winona, Minnesota where operations are conducted. The leases were entered into in 1996 in connection with the Company's acquisition of EMD. The lease covering the EMD Central building is for a term of 10 years commencing September 1, 1996 at a net rent of $17,150 per month. The lease covering the EMD East building and the adjacent parking lot is for a term of 10 years commencing July 30, 1996 at a net rent of $50,932 per month. Both of such leases may be renewed at the option of the Company at fair market rental rates. The Company negotiated the terms of the leases, including purchase options, on an arms-length basis, and obtained appraisals of the real estate and rental values to help establish such terms. The Company believes the terms of such leases are no less favorable to the Company than could have been obtained from unaffiliated third parties. The Company does business with E-Tool, Inc., formerly a division of DCM Tech, Inc. On December 30, 2002, E-Tool, Inc. was sold to Chris Arnold, the son of David H. Arnold. E-Tool provided tooling services to the Company totaling $34,344 during 2003.

John C. Custer served as Chairman of Benchmark Electronics, Inc. from 1991 to May 2001

Mr. Nigbor served as and Chief Executive Officer from May 2001 until September 2004, President from 1986 to May 2001 and General Manager from 1984 to 1990.

4/3/2003 Proxy Information

The Company leases from David H. Arnold, a director of the Company, his spouse and certain other persons the real estate and buildings in Winona, Minnesota where operations are conducted. The leases were entered into in 1996 in connection with the Company's acquisition of EMD. The lease covering the EMD Central building is for a term of 10 years commencing September 1, 1996 at a net rent of $17,150 per month. The lease covering the EMD East building and the adjacent parking lot is for a term of 10 years commencing July 30, 1996 at a net rent of $50,932 per month. Both of such leases may be renewed at the option of the Company at fair market rental rates. The Company negotiated the terms of the leases, including purchase options, on an arms-length basis, and obtained appraisals of the real estate and rental values to help establish such terms. The Company believes the terms of such leases are no less favorable to the Company than could have been obtained from unaffiliated third parties.

The Company does business with E-Tool, Inc., formerly a division of DCM Tech, Inc. On December 30, 2002, E-Tool, Inc. was sold to Chris Arnold, the son of David H. Arnold. E-Tool provided tooling services to the Company totaling $155,220 during 2002.