Past Participating Companies
- Abbott
- Air Products and Chemicals Inc
- AMCOL International Inc.
- Anadarko Petroleum
- Apple Inc.
- AT&T
- Baker Hughes
- Biogen Idec
- BNSF Railway
- Brownsville Public Utilities Board
- Cardinal Health Inc.
- Carslisle Construction Materials
- Cephalon Inc.
- Champion Technologies
- Corning Inc.
- Dell Inc.
- E.I. du Pont de Nemours & Co
- Eli Lilly and Co.
- EMC
- EnerNOC
- G&K Services Inc.
- Gates Corp.
- General Electric Co.
- Genentech Inc.
- General Mills Inc.
- Georgia-Pacific LLC
- Goodrich Corp.
- Honeywell International
- Humantech Inc.
- Intel Corp.
- InterGen
- J.B. Poindexter & Co. Inc.
- Kennametal
- Land O'Lakes Inc.
- LBNL
- Life Technologies
- Lockheed Martin Corp.
- Masco Corp.
- MillerCoors
- NRG Energy Inc.
- Orange County Transportaiton
- Authority
- Raytheon Co.
- Schneider Electric Co. Inc.
- Shaw Industries Inc.
- Southern Co.
- Target Corp.
- The Boeing Co.
- The Sherwin-Williams Co.
- The William L Bonnell Co. Inc.
- US Foodservice
- Valero Energy Co.
- Yale University