| O'BRIEN COLLECTIONS LLCPlacida, FL · Active | Placida, FL | LLC | Mar 8, 2021 | Active |
| O'BRIEN BOAT CHARTER SERVICES, INCFloral City, FL · Inactive | Floral City, FL | Corporation | Mar 12, 2025 | Inactive |
| GATOR LANDMARK, LLCJupiter, FL · Active | Jupiter, FL | LLC | May 6, 2025 | Active |
| BLUEPRINT ACADEMICS LLCJupiter, FL · Inactive | Jupiter, FL | LLC | Mar 28, 2025 | Inactive |
| GEN-CON GROUP, LLCLake Mary, FL · Inactive | Lake Mary, FL | LLC | Feb 15, 2016 | Inactive |
| YEYO GROUP, LLCLantana, FL · Active | Lantana, FL | LLC | Sep 20, 2024 | Active |
| COMMERCIAL ROOFING INDUSTRIES, LLCPompano Beach, FL · Active | Pompano Beach, FL | LLC | Nov 28, 2018 | Active |
| COASTAL BUILDING GROUP, INC.Indialantic, FL · Active | Indialantic, FL | Corporation | Jul 15, 2014 | Active |
| MANATEE APPLIANCE REPAIR LLCMyakka City, FL · Active | Myakka City, FL | LLC | Jan 5, 2023 | Active |
| O'BRIEN DEBRIS SOLUTION LLCOcala, FL · Active | Ocala, FL | LLC | Jan 14, 2022 | Active |
| A BETTER WAY OF BREVARD, INC.Palm Bay, FL · Inactive | Palm Bay, FL | Corporation | Aug 6, 2007 | Inactive |
| PREMIER PLUMBING & GAS LLCPensacola, FL · Active | Pensacola, FL | LLC | Jun 21, 2017 | Active |
| MY O'BRIEN ENTERPRISES, LLCSpring Hill, FL · Active | Spring Hill, FL | LLC | Dec 30, 2014 | Active |
| DYNAXE WORKFORCE, LLCTampa, FL · Active | Tampa, FL | LLC | Jun 9, 2022 | Active |
| HOMESTEAD MORTGAGE CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 23, 2007 | Inactive |
| MATTHEW O'BRIEN PAINTING LLCRoyal Palm Beach, FL · Inactive | Royal Palm Beach, FL | LLC | Sep 24, 2012 | Inactive |
| THUNDER BAY CUSTOM CONSTRUCTION, LLCSpring Hill, FL · Inactive | Spring Hill, FL | LLC | Jul 28, 2015 | Inactive |
| F&M TRANSPORTATION, LLCTampa, FL · Inactive | Tampa, FL | LLC | Dec 19, 2017 | Inactive |
| O'BRIEN PRO PAINTING LLCLoxahatchee, FL · Inactive | Loxahatchee, FL | LLC | Mar 6, 2019 | Inactive |
| FORGOTTEN COAST OASIS LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Aug 18, 2026 | Active |
| MANNINO'S CORPORATIONWellington, FL · Inactive | Wellington, FL | Corporation | Feb 21, 1990 | Inactive |
| 4TH STREET LLCMiami, FL · Inactive | Miami, FL | LLC | Dec 13, 2006 | Inactive |
| ACTIVE MINERALS INTERNATIONAL, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | May 16, 2007 | Active |
| GEN - CON GROUP, LLCWinter Springs, FL · Inactive | Winter Springs, FL | LLC | Nov 2, 2011 | Inactive |
| PLANTATION ROAD HOLDINGS LLCOrlando, FL · Inactive | Orlando, FL | LLC | Jun 5, 2017 | Inactive |
| SUCCESS BY GRACE, INCSpring Hill, FL · Inactive | Spring Hill, FL | Nonprofit | Feb 17, 2015 | Inactive |
| CENTER STREET PAC INC.Tallahassee, FL · Inactive | Tallahassee, FL | Nonprofit | Oct 5, 2021 | Inactive |
| IMAGE ENTERPRISES OF BREVARD, INC.Palm Bay, FL · Inactive | Palm Bay, FL | Corporation | Sep 3, 2004 | Inactive |
| MY O'BRIEN ENTERPRISES INCWesley Chapel, FL · Inactive | Wesley Chapel, FL | Corporation | Aug 28, 2008 | Inactive |
| TWO BROTHERS ENTERPRISES INCSatellite Beach, FL · Inactive | Satellite Beach, FL | Corporation | Sep 8, 2008 | Inactive |
| EXECUVEST PROPERTIES CORP.Wesley Chapel, FL · Inactive | Wesley Chapel, FL | Corporation | Jun 20, 2011 | Inactive |
| SKENG RECORDS, INCPensacola, FL · Inactive | Pensacola, FL | Corporation | Aug 16, 2012 | Inactive |
| AMERICA CUSTOM HOME BUILDER, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 3, 2014 | Inactive |
| THE SINKHOLE DOCTOR, INC.Spring Hill, FL · Inactive | Spring Hill, FL | Corporation | Jul 7, 2014 | Inactive |
| O'BRIEN BOAT CHARTER, INCFloral City, FL · Inactive | Floral City, FL | Corporation | Mar 31, 2023 | Inactive |
| O'BRIEN INVESTMENTS & TRADING, INCFloral City, FL · Active | Floral City, FL | Corporation | Mar 12, 2026 | Active |