| WINDHAM SAND AND STONE, INC.Columbia, CT · Dissolved | Columbia, CT | Corporation | Jan 3, 1967 | Dissolved |
| MANSFIELD NONPROFIT HOUSING DEVELOPMENT CORPORATION THEStorrs, CT · Active | Storrs, CT | Corporation | Jan 24, 1983 | Active |
| 19 WINDHAM GREEN, LLCStorrs, CT · Dissolved | Storrs, CT | LLC | Sep 9, 1998 | Dissolved |
| STERLING GROUP I, LLCWillimantic, CT · Dissolved | Willimantic, CT | LLC | Sep 1, 1999 | Dissolved |
| BIKE FOR BREAD, INC.Willimantic, CT · Forfeited | Willimantic, CT | Corporation | Aug 8, 2002 | Forfeited |
| ROSAL'S RENTALS, LLCWillimantic, CT · Forfeited | Willimantic, CT | LLC | Jan 26, 2004 | Forfeited |
| MCGRATH LAW PROPERTIES, LLCWillimantic, CT · Active | Willimantic, CT | LLC | Aug 23, 2004 | Active |
| AND 18, LLCBloomfield, CT · Forfeited | Bloomfield, CT | LLC | Nov 29, 2004 | Forfeited |
| STONE CORNER PROPERTY, LLCWillimantic, CT · Dissolved | Willimantic, CT | LLC | Jan 5, 2005 | Dissolved |
| APPLIANCE WORLD 16, LLCWaterbury, CT · Forfeited | Waterbury, CT | LLC | Jan 12, 2005 | Forfeited |
| MCGRATH & MCGRATH, LLCWillimantic, CT · Active | Willimantic, CT | LLC | Jan 28, 2005 | Active |
| M.G. SITE DEVELOPMENT, LLCWillimantic, CT · Dissolved | Willimantic, CT | LLC | Jan 31, 2005 | Dissolved |
| SEI, LLCWillimantic, CT · Forfeited | Willimantic, CT | LLC | Feb 10, 2005 | Forfeited |
| A.J.M. & ASSOCIATES, LLCHebron, CT · Forfeited | Hebron, CT | LLC | Mar 22, 2005 | Forfeited |
| 87 CHURCH STREET, LLCWillimantic, CT · Forfeited | Willimantic, CT | LLC | Apr 14, 2005 | Forfeited |
| SKK, LLCWillimantic, CT · Forfeited | Willimantic, CT | LLC | Jun 14, 2005 | Forfeited |
| PANTAS, LLCMansfield, CT · Dissolved | Mansfield, CT | LLC | Jun 28, 2005 | Dissolved |
| T.G.M. CARS, LLCWillimantic, CT · Forfeited | Willimantic, CT | LLC | Jan 13, 2006 | Forfeited |
| STRONG COURT ASSOCIATES, LLCWillimantic, CT · Active | Willimantic, CT | LLC | May 8, 2007 | Active |
| STRONG COURT PARTNERS, LLCWillimantic, CT · Active | Willimantic, CT | LLC | May 14, 2007 | Active |
| BARREA PLUMBING, LLCSouth Windham, CT · Dissolved | South Windham, CT | LLC | Jan 8, 2008 | Dissolved |
| J P AIRCRAFT HOLDINGS, LLCNorth Windham, CT · Forfeited | North Windham, CT | LLC | Jan 8, 2008 | Forfeited |
| COLUMBIA CLEANERS, LLCWillimantic, CT · Dissolved | Willimantic, CT | LLC | Feb 22, 2008 | Dissolved |
| EXPERIENCE CAMPUS, LLCWillimantic, CT · Dissolved | Willimantic, CT | LLC | Mar 24, 2008 | Dissolved |
| HOSPITALIST PHYSICIANS OF EASTERN CONNECTICUT, LLCWillimantic, CT · Dissolved | Willimantic, CT | LLC | Dec 17, 2008 | Dissolved |
| M. MORAN BUILDERS, LLCWindham, CT · Active | Windham, CT | LLC | Dec 31, 2008 | Active |
| WINDHAM VILLAGE ASSOCIATION, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Nov 17, 2009 | Forfeited |
| WILLIMANTIC HOUSING CORPORATIONWillimantic, CT · Active | Willimantic, CT | Corporation | Jul 17, 2015 | Active |
| THE KEITH J. NASIN CHARITABLE FOUNDATION, INC.Willimantic, CT · Active | Willimantic, CT | Corporation | Dec 30, 2021 | Active |