| POQUONOCK FIRE COMPANY, INCORPORATED, THEPoquonock, CT · Active | Poquonock, CT | Corporation | Mar 6, 1956 | Active |
| ST. CASIMIR'S LITHUANIAN SOCIETY, INCORPORATEDPoquonock, CT · Active | Poquonock, CT | Corporation | Apr 5, 1949 | Active |
| ITALIAN CORNER,INC.Poquonock, CT · Dissolved | Poquonock, CT | Corporation | Dec 10, 1980 | Dissolved |
| POQUONOCK DELI AND SANDWICH SHOP, INC.Poquonock, CT · Dissolved | Poquonock, CT | Corporation | Feb 21, 1986 | Dissolved |
| ZOT PLUMBING & HEATING, INC.Poquonock, CT · Dissolved | Poquonock, CT | Corporation | Jan 31, 1990 | Dissolved |
| MRGL LLCPoquonock, CT · Dissolved | Poquonock, CT | LLC | Mar 3, 1995 | Dissolved |
| TRENDSETTERS HAIR, SKIN & NAILS, LLCPoquonock, CT · Active | Poquonock, CT | LLC | Aug 14, 1995 | Active |
| CK CONSTRUCTION LLCPoquonock, CT · Active | Poquonock, CT | LLC | Jan 6, 2004 | Active |
| CK LAND DEVELOPERS LLCPoquonock, CT · Dissolved | Poquonock, CT | LLC | Mar 2, 2004 | Dissolved |
| PAT'S CLEAN SWEEP, INC.Poquonock, CT · Dissolved | Poquonock, CT | Corporation | Mar 22, 2005 | Dissolved |
| WASHINGTON BUILDERS, LLCSharon, CT · Dissolved | Sharon, CT | LLC | Oct 11, 2005 | Dissolved |
| DOLLAR GREEN LLCWindsor, CT · Forfeited | Windsor, CT | LLC | Jul 11, 2007 | Forfeited |
| LANA'S CLEANING SERVICE L.L.C.Poquonock, CT · Dissolved | Poquonock, CT | LLC | Nov 21, 2007 | Dissolved |
| PNH OF MANCHESTER LLCManchester, CT · Forfeited | Manchester, CT | LLC | Jun 18, 2009 | Forfeited |
| NEW YORK CUTS LLCPoquonock, CT · Forfeited | Poquonock, CT | LLC | Sep 11, 2009 | Forfeited |
| ZOT PLUMBING AND HEATING LLCPoquonock, CT · Dissolved | Poquonock, CT | LLC | Jan 18, 2012 | Dissolved |
| POQUONOCK CENTRAL PACKAGE STORE, LLCPoquonock, CT · Dissolved | Poquonock, CT | LLC | Nov 19, 2014 | Dissolved |
| AIR NORRIS QUARTERBACK DEVELOPMENT ACADEMY LLCPoquonock, CT · Active | Poquonock, CT | LLC | Jun 17, 2015 | Active |
| CHARTER OAK HOME BUYERS, LLCPoquonock, CT · Forfeited | Poquonock, CT | LLC | Jul 25, 2016 | Forfeited |
| HEALTH PROMOTION LLCMilford, CT · Forfeited | Milford, CT | LLC | Feb 13, 2017 | Forfeited |
| HELEN CHARETTE, MSW, LCSW, LLCTolland, CT · Dissolved | Tolland, CT | LLC | May 30, 2017 | Dissolved |
| MTZ DRYWALL LLCMilford, CT · Forfeited | Milford, CT | LLC | Nov 2, 2017 | Forfeited |
| WILLOW BEAUTY LLCWindsor, CT · Active | Windsor, CT | LLC | Jun 19, 2018 | Active |
| SIMPLY FRESH BISTRO LLCPoquonock, CT · Dissolved | Poquonock, CT | LLC | Oct 30, 2018 | Dissolved |
| Hartfelt Whimsies LLCPoquonock, CT · Active | Poquonock, CT | LLC | Mar 31, 2023 | Active |
| A & A Davis Carpentry llcPoquonock, CT · Active | Poquonock, CT | LLC | Aug 14, 2025 | Active |
| Air Norris Sports Mentorship Inc.Poquonock, CT · Active | Poquonock, CT | Corporation | Jun 13, 2025 | Active |
| PREVENTATIVE MAINTENANCE CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Aug 17, 1999 | Inactive |