| ESI SEMASS CORP. LP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Oct 23, 1989 | Inactive |
| ESI WTE DEVELOPMENT, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Nov 6, 1989 | Inactive |
| ESI WEST ENFIELD, INC.Juno Bch, FL · Inactive | Juno Bch, FL | Corporation | Jul 27, 1990 | Inactive |
| ESI JONESBORO, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Jul 27, 1990 | Inactive |
| NEVADA GEOTHERMAL HOLDINGS L.L.C.Juno Beach, FL · Inactive | Juno Beach, FL | LLC | Sep 30, 1998 | Inactive |
| FPL-I TPP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Feb 23, 2000 | Inactive |
| ESI EBENSBURG GP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Mar 29, 2000 | Inactive |
| ESI EBENSBURG LP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Mar 29, 2000 | Inactive |
| COASTAL VENDING SERVICES, INC.Jacksonville, FL · Inactive | Jacksonville, FL | Corporation | Nov 17, 2003 | Inactive |
| SKYLINK SECURITY , INCJacksonville, FL · Inactive | Jacksonville, FL | Corporation | Oct 29, 2014 | Inactive |
| ESI DIXIE VALLEY, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Mar 3, 1994 | Inactive |
| ESI DIXIE VALLEY LP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Mar 17, 1994 | Inactive |
| ESI STEAMBOAT, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Sep 27, 1995 | Inactive |
| ESI PHILIPPINES, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Nov 6, 1995 | Inactive |
| FPL ENERGY BRADY POWER SERVICES, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Mar 5, 1996 | Inactive |
| FPL ENERGY DOSWELL POWER SERVICES, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Oct 29, 1996 | Inactive |
| FPL ENERGY CALISTOGA POWER SERVICES, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Jan 7, 1997 | Inactive |
| ESI CHESAPEAKE POWER, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Jan 23, 1997 | Inactive |
| FPL GROUP ARGENTINA, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Jun 12, 1997 | Inactive |
| ESI NEW JERSEY ENERGY GP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Nov 14, 1997 | Inactive |
| ESI ANTILLES, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Apr 8, 1992 | Inactive |
| ESI ANTILLES LP, INC.Juno Beach, FL · Inactive | Juno Beach, FL | Corporation | Apr 8, 1992 | Inactive |