| THOMAS JOHNSTON CONSULTING INCFort Lauderdale, FL · Active | Fort Lauderdale, FL | Corporation | Feb 4, 2019 | Active |
| OCEANWAY SPORTS ASSOCIATION, CORPJacksonville, FL · Active | Jacksonville, FL | Nonprofit | Oct 2, 2009 | Active |
| BUBBAKOOS PALM BAY, LLCPalm Bay, FL · Active | Palm Bay, FL | LLC | Jun 8, 2021 | Active |
| JOHNSTON BOYS CONSULTING LLCWinter Park, FL · Active | Winter Park, FL | LLC | Jun 18, 2020 | Active |
| BUBBAKOO'S SPACE COAST, LLCMelbourne, FL · Active | Melbourne, FL | LLC | Oct 10, 2019 | Active |
| BRAVECO LLCPort St. Lucie, FL · Inactive | Port St. Lucie, FL | LLC | Jul 1, 2025 | Inactive |
| PURPLE DUCK HOLDINGS LLCZephyrhills, FL · Active | Zephyrhills, FL | LLC | Sep 10, 2025 | Active |
| JOHNSTON CONSTRUCTION & CUSTOM TRIM, LLCWinter Garden, FL · Active | Winter Garden, FL | LLC | Apr 3, 2013 | Active |
| S. BREDA PLUMBING, INC.Boca Raton, FL · Inactive | Boca Raton, FL | Corporation | Feb 27, 1979 | Inactive |
| AMERICAN TEKNICON ASSOCIATES, INC.Plantation, FL · Inactive | Plantation, FL | Corporation | Aug 20, 1979 | Inactive |
| MIDPORT PLUMBING & SUPPLY, INC.Port St. Lucie, FL · Inactive | Port St. Lucie, FL | Corporation | Sep 3, 1980 | Inactive |
| MERRITT ISLAND VOLUNTEER FIRE DEPARTMENT, INC.Merritt Island, FL · Active | Merritt Island, FL | Nonprofit | Mar 12, 1964 | Active |
| L.B. WILSON, INCORPORATEDMiami, FL · Inactive | Miami, FL | Corporation | Aug 19, 1953 | Inactive |
| ABN AMRO MORTGAGE CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 20, 1995 | Inactive |
| COMPU-SHARE INTERNATIONAL, INC.Miami, FL · Inactive | Miami, FL | Corporation | Dec 19, 1983 | Inactive |
| CARILLON PROPERTIES, INC.Miami, FL · Inactive | Miami, FL | Corporation | Nov 25, 1985 | Inactive |
| 6801 COLLINS AVENUE, INC.Plantation, FL · Inactive | Plantation, FL | Corporation | Oct 24, 1986 | Inactive |
| PRO-TEC WATER SYSTEMS INC.Port St. Lucie, FL · Inactive | Port St. Lucie, FL | Corporation | Nov 13, 1987 | Inactive |
| JOHNSTON & COLEMAN PROPERTIES LLCTallahassee, FL · Inactive | Tallahassee, FL | LLC | Jan 20, 2004 | Inactive |
| WINE, ETC. LLCCoral Springs, FL · Inactive | Coral Springs, FL | LLC | Jul 22, 2004 | Inactive |
| TOTAL LEISURE GROUP, LLCSebastian, FL · Inactive | Sebastian, FL | LLC | Dec 9, 2011 | Inactive |
| DELICIOUS DESIGNS, LLCLocation not reported, FL · Inactive | Location not reported, FL | LLC | Mar 11, 2013 | Inactive |
| JUST BIKES LLCBradenton, FL · Inactive | Bradenton, FL | LLC | Dec 29, 2021 | Inactive |
| JOHNSTON HOME IMPROVEMENT, LLCPompano Beach, FL · Active | Pompano Beach, FL | LLC | Apr 24, 2026 | Active |
| SOUTHERN SHUTTER ASSOCIATION, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Nonprofit | Apr 22, 1996 | Inactive |
| HOLLEYWOOD FLOORS, INCOdessa, FL · Inactive | Odessa, FL | Corporation | Dec 22, 2010 | Inactive |
| STABILITY INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Feb 8, 2011 | Inactive |
| HOLLEYWOOD FLOORS INCOdessa, FL · Inactive | Odessa, FL | Corporation | Feb 24, 2015 | Inactive |
| NORTH AMERICAN MARINE PROPELLER, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 17, 1990 | Inactive |