2007
Caterpillar, Inc.
2006
Monsanto Company
2005
UGS
2004
Square D/Schneider Electric
2002
W.M. Keck Foundation
|
2001
Cargill, Inc.
2000
Maytag Corporation Foundation
1999
Deere & Company
1998
W. K. Kellogg Foundation
1997
Roy J. Carver Charitable Trust
|
1996
Lied Foundation Trust,
Christina Hixson, Trustee
1995
Pioneer Hi-Bred International, Inc
1994
Silicon Graphics
1993
Digital Equipment
|