- Massachusetts Bay Transit Authority
- City of Worcester
- The Gillette Company
- Massachusetts Institute of Technology
- Boston University
- Distrigas of Massachusetts
- Archdiocese of Boston
- Reebok International
- Harvard University
- NSTAR
- BV Development
- Jackson Laboratories
- MASSPORT
- Division of Capital Asset Management
- Massachusetts State College Building Authority
- New Balance Athletic Shoe Company
- TIAA-CREF
- City of Boston
- Waste Options