| ZFC EQUIPMENT CORPORATIONAvon, CT · Dissolved | Avon, CT | Corporation | Dec 20, 1989 | Dissolved |
| BIOGAS FINANCIAL CORPORATIONAvon, CT · Forfeited | Avon, CT | Corporation | Apr 15, 1994 | Forfeited |
| OCEANSIDE ENERGY, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 25, 1994 | Withdrawn |
| U.S. ENERGY BIOGAS CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 10, 1994 | Withdrawn |
| ZFC ENERGY, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Dec 1, 1994 | Withdrawn |
| ZAPCO ENERGY TACTICS CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 8, 1995 | Withdrawn |
| ZAPCO DEVELOPMENT CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 15, 1999 | Withdrawn |
| ZAPCO EQUIPMENT CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 15, 1999 | Withdrawn |
| ZAPCO ILLINOIS ENERGY, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 15, 1999 | Withdrawn |
| POWER GENERATION (SUFFOLK), INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 15, 1999 | Withdrawn |
| SUFFOLK BIOGAS INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 15, 1999 | Withdrawn |
| ZAPCO READVILLE COGENERATION, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 15, 1999 | Withdrawn |
| ZAPCO BROOME NANTICOKE CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 19, 1999 | Withdrawn |
| BURLINGTON ENERGY, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 19, 1999 | Withdrawn |
| RESOURCES GENERATING SYSTEMS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 19, 1999 | Withdrawn |
| ZMG, INC.Avon, CT · Withdrawn | Avon, CT | Corporation | Dec 29, 2000 | Withdrawn |
| MORRIS GENCO, L.L.C.Avon, CT · Cancelled | Avon, CT | LLC | Apr 2, 2001 | Cancelled |
| COUNTRYSIDE GENCO, L.L.C.Avon, CT · Cancelled | Avon, CT | LLC | Apr 2, 2001 | Cancelled |
| BROOKHAVEN ENERGY PARTNERS, LLCAvon, CT · Cancelled | Avon, CT | LLC | Apr 2, 2001 | Cancelled |
| ZAPCO SHAREHOLDERS, LLCAvon, CT · Dissolved | Avon, CT | LLC | Apr 11, 2001 | Dissolved |
| HOFFMAN ROAD ENERGY PARTNERS, LLCAvon, CT · Cancelled | Avon, CT | LLC | Apr 12, 2001 | Cancelled |
| BROWN COUNTY ENERGY ASSOCIATES, LLCAvon, CT · Cancelled | Avon, CT | LLC | Apr 12, 2001 | Cancelled |
| AYA ENTERPRISES, INC.Old Saybrook, CT · Active | Old Saybrook, CT | Corporation | Oct 7, 2019 | Active |