| LAW OFFICES OF JAMES M. COSTELLO, P.L.Cape Coral, FL · Active | Cape Coral, FL | LLC | Dec 21, 2001 | Active |
| GOODERHAM & ASSOCIATES, INC.Fort Myers, FL · Active | Fort Myers, FL | Corporation | Oct 31, 2000 | Active |
| COUNTYLINE REALTY, INC.Hallandale, FL · Inactive | Hallandale, FL | Corporation | Mar 28, 1980 | Inactive |
| CAPTIVA HOLDINGS, LTD.Location not reported, FL · Inactive | Location not reported, FL | Partnership | May 9, 1997 | Inactive |
| SARTRE PARTNERS, LPLocation not reported, FL · Active | Location not reported, FL | Partnership | May 16, 1997 | Active |
| SOL PROPERTY DEVELOPMENT, INC.Sanibel, FL · Inactive | Sanibel, FL | Corporation | Jul 3, 2001 | Inactive |
| EMERALD FLORIDA, L.L.C.Location not reported, FL · Inactive | Location not reported, FL | LLC | Jul 10, 2001 | Inactive |
| TEMPORARY AIR CONDITIONING, LLCFort Myers, FL · Inactive | Fort Myers, FL | LLC | Aug 6, 2002 | Inactive |
| NORTH AMERICAN MOLD REMEDIATION SERVICES, LLCCape Coral, FL · Inactive | Cape Coral, FL | LLC | Aug 6, 2002 | Inactive |
| WHITHAM, LLC.Fort Myers, FL · Inactive | Fort Myers, FL | LLC | Apr 26, 2004 | Inactive |
| COSTELLO QUALITY CONSTRUCTION, LLCMelbourne, FL · Inactive | Melbourne, FL | LLC | May 29, 2013 | Inactive |
| OFFSHORE TRADING CO., L.L.C.Location not reported, FL · Active | Location not reported, FL | LLC | May 9, 1997 | Active |
| HARDY BOYS, LLCSanibel, FL · Inactive | Sanibel, FL | LLC | Oct 20, 2008 | Inactive |
| FL OFFICE, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Nov 20, 2008 | Active |
| FL-I DID IT, LLCLocation not reported, FL · Inactive | Location not reported, FL | LLC | Feb 12, 2009 | Inactive |
| FL - MARATHON DEVELOPMENT, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Mar 2, 2009 | Active |
| NC RENTALS, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Dec 7, 2009 | Active |
| CARPENTRY DESIGNS & CONCEPTS, INC.Melbourne, FL · Active | Melbourne, FL | Corporation | Jun 13, 1988 | Active |
| CAMUS & COMPANY, L.L.C.Location not reported, FL · Inactive | Location not reported, FL | LLC | May 16, 1997 | Inactive |
| VICEROY CONDOMINIUM OWNERS' ASSOCIATION, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Nonprofit | Dec 2, 2004 | Inactive |
| SUNSET LAKE II CONDOMINIUM ASSOCIATION, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Nonprofit | Jan 18, 2007 | Inactive |
| THE STUDIO PROJECT, INC.Location not reported, FL · Inactive | Location not reported, FL | Nonprofit | Feb 14, 2012 | Inactive |
| THE MARVIN AND HELENE GRALNICK FOUNDATION, INC.Location not reported, FL · Active | Location not reported, FL | Nonprofit | Oct 8, 1993 | Active |
| BRIGHT FUTURES HOLDINGS, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Corporation | Oct 4, 2002 | Inactive |
| VOLT TECH, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Corporation | Jan 15, 2003 | Inactive |
| JIM COSTELLO CARPENTRY INC.Tarpon Springs, FL · Inactive | Tarpon Springs, FL | Corporation | Oct 27, 2003 | Inactive |
| 2235 ASSOCIATES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 22, 1993 | Inactive |
| VIP DEVELOPMENT GROUP, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Corporation | Jun 10, 1998 | Inactive |
| HAMMERMEISTER, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Corporation | Dec 17, 1998 | Inactive |