- Claflin Capital Management Inc
- Corning Technology Ventures
- Egan Managed Capital L & P
- Millennia Partners
- Morgan Stanley
- New England Capital Management
- Nucon Capital Corp
- Reach Venture Port
- Shawmut Capital Partners
- Sigma Partners
- Spectrum Equity Investors
- Still River Fund
- T A Assoc
- TVM Capital
- Venrock Associates
- Zero Stage Capital