| QUANTUM REAL ESTATE, LLCWest Hartford, CT · Dissolved | West Hartford, CT | LLC | Feb 18, 2004 | Dissolved |
| REAL ESTATE VENTURES, LLCBerlin, CT · Dissolved | Berlin, CT | LLC | Jun 14, 2004 | Dissolved |
| QUANTUM OF ELLINGTON, LLCCromwell, CT · Dissolved | Cromwell, CT | LLC | Jan 20, 2005 | Dissolved |
| QUANTUM OF TOLLAND, LLCWest Hartford, CT · Dissolved | West Hartford, CT | LLC | Jan 20, 2005 | Dissolved |
| QUANTUM OF WEST HARTFORD, LLCWest Hartford, CT · Dissolved | West Hartford, CT | LLC | Feb 22, 2005 | Dissolved |
| QUANTUM OF BERLIN I, LLCBerlin, CT · Dissolved | Berlin, CT | LLC | Apr 12, 2005 | Dissolved |
| QUANTUM OF BERLIN II, LLCBerlin, CT · Active | Berlin, CT | LLC | Apr 15, 2005 | Active |
| NORTH BROOK OF CROMWELL, LLCBerlin, CT · Dissolved | Berlin, CT | LLC | Oct 3, 2005 | Dissolved |
| QUANTUM OFFICE OF CROMWELL, LLCBerlin, CT · Active | Berlin, CT | LLC | Feb 3, 2006 | Active |
| QUANTUM OF ELLINGTON II, LLCCromwell, CT · Dissolved | Cromwell, CT | LLC | May 9, 2006 | Dissolved |
| NEWBURY OF CROMWELL, LLCCromwell, CT · Dissolved | Cromwell, CT | LLC | May 17, 2006 | Dissolved |
| QUANTUM OF MYSTIC, LLCBerlin, CT · Active | Berlin, CT | LLC | Aug 6, 2007 | Active |
| BERLIN III, LLCBerlin, CT · Dissolved | Berlin, CT | LLC | May 14, 2008 | Dissolved |
| CROMWELL III, LLCBerlin, CT · Active | Berlin, CT | LLC | Jun 30, 2008 | Active |
| OPPORTUNITY MANAGEMENT, LLCBerlin, CT · Active | Berlin, CT | LLC | Nov 7, 2008 | Active |
| LISBON SQUARE, LLCBerlin, CT · Dissolved | Berlin, CT | LLC | Jan 9, 2009 | Dissolved |
| 272 MAIN STREET PORTLAND, LLCBerlin, CT · Active | Berlin, CT | LLC | Aug 12, 2009 | Active |
| OPPORTUNITY REAL ESTATE EQUITIES, LLCBerlin, CT · Active | Berlin, CT | LLC | Jul 29, 2013 | Active |
| QUANTUM OF HERALD SQUARE, LLCBerlin, CT · Active | Berlin, CT | LLC | Jan 27, 2016 | Active |
| QUANTUM OF WASHINGTON STREET, LLCBerlin, CT · Active | Berlin, CT | LLC | Aug 2, 2016 | Active |
| QUANTUM OF HART STREET, LLCCromwell, CT · Dissolved | Cromwell, CT | LLC | Aug 28, 2018 | Dissolved |
| QUANTUM RESIDENTIAL PROPERTIES LLCBerlin, CT · Active | Berlin, CT | LLC | Jun 18, 2019 | Active |
| OREEX, INCBerlin, CT · Dissolved | Berlin, CT | Corporation | Oct 17, 2020 | Dissolved |
| Quantum of Scarborough Street LLCCromwell, CT · Dissolved | Cromwell, CT | LLC | Jul 19, 2021 | Dissolved |
| OREEXX, LLCBerlin, CT · Active | Berlin, CT | LLC | Oct 6, 2021 | Active |
| OREE Lending Company, LLCBerlin, CT · Active | Berlin, CT | LLC | Jun 28, 2022 | Active |
| Quantum of West Street, LLCBerlin, CT · Active | Berlin, CT | LLC | Mar 9, 2023 | Active |
| Quantum of Westbrook, LLCBerlin, CT · Active | Berlin, CT | LLC | Oct 13, 2023 | Active |
| Quantum of Berlin III, LLCBerlin, CT · Active | Berlin, CT | LLC | Nov 16, 2023 | Active |