| SEAQUATICS CORP.Sugarloaf Shores, FL · Inactive | Sugarloaf Shores, FL | Corporation | Jun 18, 1979 | Inactive |
| TWIN FIN DIVE SOCIETY, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jul 10, 1979 | Inactive |
| COASTAL SERVICES & SALVAGE, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Aug 16, 1979 | Inactive |
| SAR & ASSOCIATES, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Sep 26, 1979 | Inactive |
| KEY BEE APIARIES, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Oct 16, 1979 | Inactive |
| SUMMERLAND HOMES, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Oct 22, 1979 | Inactive |
| PEGASUS CANVAS & SAIL, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Nov 26, 1979 | Inactive |
| 3 R SERVICES, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Dec 19, 1979 | Inactive |
| SAILS AND PLANES LEASING, INC.Middle Torch Key, FL · Inactive | Middle Torch Key, FL | Corporation | Mar 11, 1980 | Inactive |
| PALM TREE TRAILER PARK, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Mar 19, 1980 | Inactive |
| SUNSHINE SEAFOOD COMPANYSummerland Key, FL · Inactive | Summerland Key, FL | Corporation | Mar 26, 1980 | Inactive |
| FLORIDA KEYS INVESTMENT PROPERTIES, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Dec 14, 1979 | Inactive |
| WEBER SEAFOOD, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | May 30, 1980 | Inactive |
| THOMAS ANTHONY, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jun 12, 1980 | Inactive |
| COLBY INTERIORS, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jul 18, 1980 | Inactive |
| SUMMERLAND STANDARD SERVICE, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Aug 11, 1980 | Inactive |
| TRIANGLE WATER SPORTS, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Sep 18, 1980 | Inactive |
| FANTASY LOBSTER, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Sep 18, 1980 | Inactive |
| SUMMERLAND KEY MARINA, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jun 23, 1981 | Inactive |
| SUNDANCE EXPEDITIONS, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jul 1, 1981 | Inactive |
| RDAD, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jul 31, 1981 | Inactive |
| SUMMERLAND KEY CIVIC ASSOCIATION INCSummerland Key, FL · Inactive | Summerland Key, FL | Nonprofit | Apr 25, 1960 | Inactive |
| FUN-IN-THE-SUN CLUB, INC.Location not reported, FL · Inactive | Location not reported, FL | Nonprofit | Feb 2, 1965 | Inactive |
| THE SUGAR LOAF KEY VOLUNTEER FIRE DEPARTMENT, INC.Sugarloaf Key, FL · Inactive | Sugarloaf Key, FL | Nonprofit | Jul 20, 1966 | Inactive |
| NAUTICAL WHEELERS SQUARE DANCE CLUB, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Nonprofit | Feb 20, 1970 | Inactive |
| THE SUGAR LOAF SHORES PROPERTY OWNERS ASSOCIATION, INC.Sugarloaf Shores, FL · Active | Sugarloaf Shores, FL | Nonprofit | Jun 3, 1971 | Active |
| VENTURE OUT AT CUDJOE CAY, INC. A CONDOMINIUMCudjoe Key, FL · Active | Cudjoe Key, FL | Nonprofit | Aug 12, 1975 | Active |
| BREEZESWEPT BEACH ESTATES CIVIC ASSOCIATION, INC.Ramrod Key, FL · Active | Ramrod Key, FL | Nonprofit | Jul 14, 1976 | Active |
| THE CUDJOE GARDENS PROPERTY OWNERS ASSOCIATION, INC.Cudjoe Key, FL · Active | Cudjoe Key, FL | Nonprofit | Oct 14, 1976 | Active |
| CASA ROMA WEST, INC.Key West, FL · Inactive | Key West, FL | Nonprofit | Jul 30, 1979 | Inactive |
| THE PARISH OF THE INCARNATION, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Nonprofit | Nov 9, 1981 | Inactive |
| KEY WEST AMATEUR RADIO CLUB, INCORPORATEDSummerland Key, FL · Inactive | Summerland Key, FL | Nonprofit | Dec 16, 1982 | Inactive |
| SACARMA BAY PROPERTY OWNERS ASSOCIATION, INC.Summerland Key, FL · Inactive | Summerland Key, FL | Nonprofit | Mar 14, 1983 | Inactive |
| V.R. HALTER & ASSOCIATES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 1, 1976 | Inactive |
| TYGER'S DEN & GROVES LTDLittle Torch Key, FL · Inactive | Little Torch Key, FL | Partnership | Mar 18, 2003 | Inactive |
| LARK HOLDINGS LIMITED PARTNERSHIPSugarloaf, FL · Inactive | Sugarloaf, FL | Partnership | Jan 12, 2005 | Inactive |
| TYCLAY, LPSugarloaf Key, FL · Active | Sugarloaf Key, FL | Partnership | Sep 5, 2006 | Active |
| CARPE DIEM WATER III, LLLPCudjoe Key, FL · Inactive | Cudjoe Key, FL | Partnership | Sep 9, 2010 | Inactive |
| LITTLE PALM ISLAND, LTD.Little Torch Key, FL · Inactive | Little Torch Key, FL | Partnership | Oct 10, 1986 | Inactive |
| AHI & CO. VILLAS LPLittle Torch Key, FL · Active | Little Torch Key, FL | Partnership | Oct 16, 2025 | Active |
| BOUNDRY, LTD.Ramrod Key, FL · Active | Ramrod Key, FL | Partnership | Sep 7, 1989 | Active |
| JACOBS FAMILY LIMITED PARTNERSHIP #1Summerland Key, FL · Inactive | Summerland Key, FL | Partnership | Aug 24, 1993 | Inactive |
| SAI FINANCIAL, LTDSugarloaf Key, FL · Inactive | Sugarloaf Key, FL | Partnership | Apr 7, 2011 | Inactive |
| HARMON CONSTRUCTION & MANAGEMENT, INC.Sugarloaf Key, FL · Active | Sugarloaf Key, FL | Corporation | Jan 27, 2000 | Active |
| ISLAND BREEZE MORTGAGE LENDERS, INC.Cudjoe Key, FL · Inactive | Cudjoe Key, FL | Corporation | Feb 25, 2000 | Inactive |
| CONCH NUCLEAR SERVICES, INC.Ramrod Key, FL · Inactive | Ramrod Key, FL | Corporation | Dec 13, 2001 | Inactive |
| ARLVC COMPUTER SYSTEMS, INC.Rumrod Key, FL · Inactive | Rumrod Key, FL | Corporation | Dec 26, 2001 | Inactive |
| VISUAL DATA GROUP INC.Summerland Key, FL · Inactive | Summerland Key, FL | Corporation | Jan 22, 2002 | Inactive |
| LIGHTHOUSE POINT INCSugarloaf Key, FL · Inactive | Sugarloaf Key, FL | Corporation | Apr 16, 2002 | Inactive |
| WW DIGITAL, INC.Cudjoe Key, FL · Inactive | Cudjoe Key, FL | Corporation | Feb 28, 2003 | Inactive |