| ROBERT S. RIBNER-CERTIFIED PUBLIC ACCOUNTANT, P.C.Noank, CT · Dissolved | Noank, CT | Corporation | Apr 17, 1972 | Dissolved |
| S H ASSOCIATES, INC.Groton, CT · Dissolved | Groton, CT | Corporation | Jan 20, 1966 | Dissolved |
| SHAFNERS' INCORPORATEDGroton, CT · Dissolved | Groton, CT | Corporation | Jul 31, 1946 | Dissolved |
| SHENECOSSETT BEACH COMPANY, INCORPORATED THEGroton, CT · Active | Groton, CT | Corporation | Aug 1, 1901 | Active |
| SOUTHEASTERN ENTERPRISES, INC.Groton, CT · Dissolved | Groton, CT | Corporation | Apr 18, 1974 | Dissolved |
| SPICER PLUS, INC.Groton, CT · Active | Groton, CT | Corporation | May 1, 1957 | Active |
| SULLY'S RESTAURANT, INC.Groton, CT · Forfeited | Groton, CT | Corporation | Mar 13, 1961 | Forfeited |
| TOMMY'S FLOWERS, LTD.Groton, CT · Dissolved | Groton, CT | Corporation | Jan 23, 1976 | Dissolved |
| UNIVERSAL FOOD STORES OF NOANK, INC.Noank, CT · Dissolved | Noank, CT | Corporation | Feb 15, 1960 | Dissolved |
| VILLAGE BAKE HOUSE, INC.Groton, CT · Active | Groton, CT | Corporation | Jun 30, 1972 | Active |
| INSURANCE PROFESSIONALS, INC. THEGroton, CT · Dissolved | Groton, CT | Corporation | Jun 28, 1973 | Dissolved |
| WHALING CITY DREDGE AND DOCK CORP.Groton, CT · Merged | Groton, CT | Corporation | Oct 24, 1958 | Merged |
| WINDSOR PLAZA, INC.Groton, CT · Dissolved | Groton, CT | Corporation | Sep 14, 1960 | Dissolved |
| CENTER GROTON VOLUNTEER FIRE COMPANY INCORPORATED, THEGroton, CT · Active | Groton, CT | Corporation | Dec 6, 1946 | Active |
| EASTERN CONNECTICUT MECHANICAL CONTRACTORS ASSOCIATION, INC.Groton, CT · Forfeited | Groton, CT | Corporation | Dec 18, 1972 | Forfeited |
| EASTERN POINT PROPERTY OWNERS' ASSOCIATION, INC., THEGroton, CT · Active | Groton, CT | Corporation | Apr 28, 1960 | Active |
| ELECTRIC BOAT APPRENTICE ALUMNI ASSOCIATION, INCORPORATED, THEGroton, CT · Forfeited | Groton, CT | Corporation | Mar 2, 1959 | Forfeited |
| ELECTRIC BOAT ATHLETIC CLUB, INCORPORATED, THEGroton, CT · Active | Groton, CT | Corporation | Jan 14, 1935 | Active |
| FRIENDS OF THE GROTON PUBLIC LIBRARY INC.Grotn, CT · Dissolved | Grotn, CT | Corporation | Apr 11, 1975 | Dissolved |
| GRISWOLD TERRACE ASSOCIATION, INC.Groton, CT · Active | Groton, CT | Corporation | Jan 12, 1971 | Active |
| GROTON BABE RUTH LEAGUE, INC.Groton, CT · Forfeited | Groton, CT | Corporation | Feb 14, 1977 | Forfeited |
| GROTON BANK HISTORICAL ASSOCIATION, INC.Groton, CT · Forfeited | Groton, CT | Corporation | Apr 7, 1977 | Forfeited |
| GROTON LONG POINT VOLUNTEER FIRE COMPANY, INCORPORATED, THEGroton Long Point, CT · Active | Groton Long Point, CT | Corporation | Aug 15, 1952 | Active |
| GROTON LONG POINT YACHT CLUB, INCORPORATED, THEGroton Long Point, CT · Active | Groton Long Point, CT | Corporation | Mar 27, 1940 | Active |
| GROTON PUBLIC HEALTH NURSING SERVICE, INC., THEGroton, CT · Merged | Groton, CT | Corporation | Sep 1, 1953 | Merged |
| GROTON SCHOLARSHIP FUND, INC.Groton, CT · Active | Groton, CT | Corporation | Jun 9, 1965 | Active |
| HARRISON MORTON WARD POST NO. 115, INC.Groton, CT · Dissolved | Groton, CT | Corporation | Jul 14, 1938 | Dissolved |
| ITALIAN-AMERICAN CITIZENS CLUB OF GROTON INCORPORATED, THEGroton, CT · Active | Groton, CT | Corporation | Apr 24, 1928 | Active |
| LIONS CLUB OF MYSTIC, CONNECTICUT INCORPORATED, THENoank, CT · Forfeited | Noank, CT | Corporation | Oct 17, 1955 | Forfeited |
| LOCAL 106, OPEIU, INC.Groton, CT · Active | Groton, CT | Corporation | Jul 25, 1966 | Active |
| MERRIT GRAHAM LODGE #1871, IAM, INC.Groton, CT · Forfeited | Groton, CT | Corporation | Feb 20, 1975 | Forfeited |
| MOUNT VERNON MASONIC TEMPLE CORPORATION, THEGroton, CT · Dissolved | Groton, CT | Corporation | Dec 15, 1971 | Dissolved |
| MUMFORD COVE ASSOCIATION, INC. THEGroton, CT · Active | Groton, CT | Corporation | Aug 17, 1961 | Active |
| MYSTIC RIVER HOMES, INCORPORATEDNoank, CT · Active | Noank, CT | Corporation | Nov 1, 1967 | Active |
| NEW ENGLAND INFORMATION DISTRIBUTORS, INC.Groton, CT · Dissolved | Groton, CT | Corporation | Sep 8, 1976 | Dissolved |
| NOANK FIRE COMPANY NO. 1 INCORPORATEDNoank, CT · Active | Noank, CT | Corporation | Apr 24, 1905 | Active |
| NOANK COMMUNITY SUPPORT SERVICES, INC.Groton, CT · Active | Groton, CT | Corporation | Feb 14, 1972 | Active |
| NOANK HISTORICAL SOCIETY, INC.Groton, CT · Active | Groton, CT | Corporation | Aug 4, 1966 | Active |
| PATROLMEN'S BENEVOLENT ASSOCIATION OF CONNECTICUT, GROTON POST NO. 3 INCORPORATEDGroton, CT · Active | Groton, CT | Corporation | Jan 2, 1947 | Active |
| RAM ISLAND YACHT CLUB INCORPORATED, THENoank, CT · Active | Noank, CT | Corporation | Mar 25, 1941 | Active |
| STONINGTON LODGE ODD FELLOWS INCORPORATEDGroton, CT · Active | Groton, CT | Corporation | Mar 8, 1917 | Active |
| SUBMARINE FORCE LIBRARY AND MUSEUM ASSOCIATION, INC.Groton, CT · Active | Groton, CT | Corporation | Nov 24, 1972 | Active |
| UNITED STATES SUBMARINE VETERANS, INC.Groton, CT · Active | Groton, CT | Corporation | May 21, 1964 | Active |
| VETERANS COUNCIL OF THE NEW LONDON AREA, INC., THEGroton, CT · Forfeited | Groton, CT | Corporation | Jan 30, 1967 | Forfeited |
| SHENNECOSSETT YACHT CLUB, INCORPORATEDGroton, CT · Active | Groton, CT | Corporation | Sep 1, 1938 | Active |
| ESTATE AND TAX PLANNING COUNCIL OF EASTERN CONNECTICUT, INC.Groton, CT · Active | Groton, CT | Corporation | Dec 23, 1977 | Active |
| FRANCHISE MANAGEMENT LIMITEDGroton, CT · Forfeited | Groton, CT | Corporation | Aug 23, 1977 | Forfeited |
| MICRO MARINE, INC.Noank, CT · Dissolved | Noank, CT | Corporation | May 8, 1978 | Dissolved |
| TAMARAH, LTD.Groton, CT · Dissolved | Groton, CT | Corporation | Jul 21, 1978 | Dissolved |
| LONG HILL ROAD CVS, INC.Groton, CT · Merged | Groton, CT | Corporation | Aug 21, 1978 | Merged |