| O'BRIEN INSPECTIONS, LLCTitusville, FL · Active | Titusville, FL | LLC | Jun 5, 2009 | Active |
| BUCKET LIST LLCTitusville, FL · Active | Titusville, FL | LLC | Apr 10, 2008 | Active |
| RTM PROPERTIES LLCWesley Chapel, FL · Active | Wesley Chapel, FL | LLC | Oct 9, 2017 | Active |
| OXFORD LAWN FRANCHISING LLCWildwood, FL · Active | Wildwood, FL | LLC | Oct 7, 2025 | Active |
| OXFORD LAWN HOLDINGS CORPORATIONWildwood, FL · Inactive | Wildwood, FL | Corporation | Oct 7, 2025 | Inactive |
| OXFORD LAWN IP LLCWildwood, FL · Active | Wildwood, FL | LLC | Oct 7, 2025 | Active |
| OXFORD LAWN PRODUCTS LLCWildwood, FL · Active | Wildwood, FL | LLC | Oct 7, 2025 | Active |
| OXFORD ORGANICS PRODUCTS LLCWildwood, FL · Active | Wildwood, FL | LLC | Jun 5, 2025 | Active |
| DOUBLE T HOLDINGS INCWildwood, FL · Active | Wildwood, FL | Corporation | Jan 22, 2016 | Active |
| OXFORD LAWN SERVICES L.L.C.Wildwood, FL · Active | Wildwood, FL | LLC | Aug 19, 2008 | Active |
| POMPANO T.V. & APPLIANCES, INC.Pompano Beach, FL · Inactive | Pompano Beach, FL | Corporation | Mar 31, 1976 | Inactive |
| O'BRIEN APPLIANCES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 25, 1980 | Inactive |
| ALLRACE FOUNDATION FOR NEEDY CHILDREN, INC.Key Biscayne, FL · Inactive | Key Biscayne, FL | Nonprofit | Jun 27, 1980 | Inactive |
| 38TH STREET INVESTMENT CORP.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Nov 20, 2002 | Inactive |
| LRC INCORPORATEDLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 1, 1996 | Inactive |
| T.J.O. CONSTRUCTION, INC.Titusville, FL · Inactive | Titusville, FL | Corporation | Dec 2, 1986 | Inactive |
| THOMAS J. O'BRIEN CONSTRUCTION, INC.Titusville, FL · Active | Titusville, FL | Corporation | Jan 11, 1988 | Active |
| VILLAGE CARTS LLCOxford, FL · Inactive | Oxford, FL | LLC | Jul 10, 2009 | Inactive |
| WEST COAST INSPECTION SERVICES "LLC"Ellenton, FL · Inactive | Ellenton, FL | LLC | Jan 19, 2010 | Inactive |
| SOLID SECURITY, LLCSaint Augustine, FL · Active | Saint Augustine, FL | LLC | Jan 5, 2011 | Active |
| O'BRIEN GREEN CONSTRUCTION, LLCTitusville, FL · Inactive | Titusville, FL | LLC | Jan 20, 2011 | Inactive |
| PINE CONSULTING LLCBonita Springs, FL · Inactive | Bonita Springs, FL | LLC | Nov 7, 2011 | Inactive |
| DOUBLE T DAWGS LLCWildwood, FL · Inactive | Wildwood, FL | LLC | Jul 11, 2017 | Inactive |
| HECK YEAH GEAR LLCWildwood, FL · Inactive | Wildwood, FL | LLC | Jan 27, 2020 | Inactive |
| O'BRIEN C & I SERVICES, LLCTitusville, FL · Active | Titusville, FL | LLC | Sep 21, 2023 | Active |
| PROSPERITY PARK PROPERTIES LLCWildwood, FL · Active | Wildwood, FL | LLC | May 16, 2024 | Active |
| O'BRIEN INSPECTION SERVICES, INC.Titusville, FL · Inactive | Titusville, FL | Corporation | Mar 17, 2000 | Inactive |
| KEY BISCAYNE FLORIST, INC.Key Biscayne, FL · Inactive | Key Biscayne, FL | Corporation | Oct 12, 2000 | Inactive |
| PAVILION FLOWER SHOP, INC.Naples, FL · Inactive | Naples, FL | Corporation | Jun 7, 2002 | Inactive |
| KEY BISCAYNE ISLAND FLORIST, INC.Key Biscayne, FL · Inactive | Key Biscayne, FL | Corporation | Jul 8, 2002 | Inactive |
| GLOBAL CUSTOMS SECURITY CONSULTING INC.Miami, FL · Inactive | Miami, FL | Corporation | Jan 6, 2006 | Inactive |
| BAY HARBOR COMMERCIAL ENTERPRISE, INC.Palm Bay, FL · Inactive | Palm Bay, FL | Corporation | Aug 8, 2007 | Inactive |
| INVIVO RESEARCH, INC.Orlando, FL · Inactive | Orlando, FL | Corporation | Jun 19, 1990 | Inactive |
| LINPRO GARDENS EAST, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Nov 9, 1990 | Inactive |
| LINPRO FLORIDA REALTY, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 11, 1990 | Inactive |
| LCOR INCORPORATEDLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 9, 1992 | Inactive |
| O.B. 1 SERVICES, INC.North Lauderdale, FL · Inactive | North Lauderdale, FL | Corporation | Aug 8, 1994 | Inactive |
| ACME SELF STORAGE, INC.Titusville, FL · Inactive | Titusville, FL | Corporation | Aug 31, 1998 | Inactive |
| WOO HOO, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Nov 24, 1999 | Active |