- 3M Corporation
- Allianz Life
- Albert Herzstein Charitable Foundation
- Association of Corporate Growth
- Best Buy Corporation
- Brookfield Properties
- CenterPoint Energy
- Chicago Public Schools
- Cockrell Family Fund
- Copano Energy
- David Winton Bell Foundation
- Dickson - Allen Foundation
- Ecolab Foundation
- El Paso Corporate Foundation
- F. R. Bigelow Foundation
- GE Power Systems
- George & Mary Josephine Hamman Foundation
- General Mills Foundation
- Greater Houston Community Foundation
- HighMount E&P
- Houston Endowment
- Houston Galveston Area Council
- HP
- Jenesis Group
- John P. McGovern Foundation
- JPMorgan Chase Foundation
- KBR
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- Kinder Morgan Foundation
- Kirkland & Ellis
- LGR Foundation
- Marathon Oil Foundation
- New Profit Inc.
- Otto Bremer Foundation
- Ray C. Fish Foundation
- Rockwell Fund
- Searle Funds at The Chicago Community Trust
- Skadden, Arps, Slate, Meaguer & Flom, LLP
- Smikis Foundation
- Social Venture Partners of Minnesota
- Solvay
- Spectra Energy
- Sysco Corporation
- The Brown Foundation
- The Harvey and Patricia Houck Foundation
- The Jay & Rose Phillips Family Foundation
- The Minneapolis Foundation
- The Powell Foundation
- The Saint Paul Foundation
- The Simmons Foundation
- Travelers Foundation
- United Space Alliance
- Waste Management Inc.
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