| CIRCLE D NURSERY, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Apr 26, 1966 | Dissolved |
| CONSULTING ENVIRONMENTAL ENGINEERS, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Jun 23, 1976 | Dissolved |
| ELVEE, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Apr 23, 1975 | Forfeited |
| REYNOLDS ASSOCIATES INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Feb 25, 1977 | Forfeited |
| FAITH TOWER AND WIRELESS CO.Higganum, CT · Dissolved | Higganum, CT | Corporation | Dec 23, 1970 | Dissolved |
| SCOTTAIRE ASSOCIATES, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Jun 17, 1976 | Dissolved |
| WINDSOR MACHINERY,INCORPORATEDHigganum, CT · Active | Higganum, CT | Corporation | Jan 4, 1954 | Active |
| OLD BURIAL YARD OF THIRTY-MILE ISLAND, INCORPORATED, THEHigganum, CT · Active | Higganum, CT | Corporation | Aug 30, 1949 | Active |
| HADDAM LAND TRUST, INC.Higganum, CT · Active | Higganum, CT | Corporation | Nov 12, 1964 | Active |
| HADDAM LITTLE LEAGUE, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Jun 10, 1963 | Forfeited |
| HADDAM SCHOLARSHIP FUND INC. THEHigganum, CT · Active | Higganum, CT | Corporation | Apr 25, 1973 | Active |
| HADDAM VOLUNTEER AMBULANCE SERVICE, INC.Higganum, CT · Active | Higganum, CT | Corporation | Jun 7, 1976 | Active |
| HADDAM VOLUNTEER FIRE DEPARTMENT INC. THEHigganum, CT · Active | Higganum, CT | Corporation | Jul 18, 1931 | Active |
| INTER-ED, INC.Higganum, CT · Active | Higganum, CT | Corporation | Aug 5, 1974 | Active |
| JAGUAR CLUB OF SOUTHERN NEW ENGLAND, INC., THEHigganum, CT · Active | Higganum, CT | Corporation | Apr 13, 1977 | Active |
| ROGERS' RANGERS, INCORPORATEDHigganum, CT · Active | Higganum, CT | Corporation | Apr 22, 1977 | Active |
| ART GUILD OF MIDDLETOWN, CONNECTICUT, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Mar 26, 1969 | Dissolved |
| FRENAN, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Sep 9, 1977 | Dissolved |
| K & J, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Mar 22, 1979 | Dissolved |
| DAVID G. SIERPINSKI, BUILDER, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Jun 1, 1979 | Dissolved |
| MASONIC BUILDING ASSOCIATION OF HADDAM, INCORPORATED THEHigganum, CT · Forfeited | Higganum, CT | Corporation | Jun 10, 1927 | Forfeited |
| AMERICAN PIPING OF CONN., INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Oct 20, 1980 | Forfeited |
| CENTRAL SYSTEMS, INC.Higganum, CT · Active | Higganum, CT | Corporation | Mar 26, 1981 | Active |
| NORTHEASTERN CLEARING, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Apr 15, 1981 | Dissolved |
| JUNIOR COLONIAL FIFE & DRUM CORPS. OF WESTBROOK CONNECTICUT, INC.Higganum, CT · Active | Higganum, CT | Corporation | May 25, 1982 | Active |
| VYNALEK CONSTRUCTION CO., INC.Higganum, CT · Active | Higganum, CT | Corporation | Sep 3, 1982 | Active |
| ESPOSITO BUILDERS, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Nov 2, 1982 | Dissolved |
| GLASTONBURY TENNIS ASSOCIATES, INCORPORATEDHigganum, CT · Dissolved | Higganum, CT | Corporation | Jan 11, 1983 | Dissolved |
| Haddam Women's Club, Inc.Higganum, CT · Active | Higganum, CT | Corporation | Mar 11, 1983 | Active |
| CYCLOPS EXPLOSIVE TECHNIQUES, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Apr 18, 1983 | Dissolved |
| EAST COAST AUTO SALVAGE, INC.Higganum, CT · Active | Higganum, CT | Corporation | Apr 21, 1983 | Active |
| NEW ENGLAND PUBLISHING ASSOCIATES, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | May 16, 1983 | Forfeited |
| NEW IMAGE AUTOMOTIVE, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Jun 10, 1983 | Forfeited |
| SANDERS ENTERPRISES, INC.Higganum, CT · Active | Higganum, CT | Corporation | Dec 10, 1984 | Active |
| WILLIAM H. MEYERS & SONS, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Apr 26, 1985 | Forfeited |
| HOYDILLA'S GARAGE INC.Higganum, CT · Active | Higganum, CT | Corporation | Jul 16, 1985 | Active |
| KEMAR, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Dec 22, 1987 | Dissolved |
| TALEVI ENTERPRISES, INC.Higganum, CT · Active | Higganum, CT | Corporation | Dec 22, 1987 | Active |
| CANDLEWOOD DEVELOPMENT COMPANYHigganum, CT · Dissolved | Higganum, CT | Corporation | Feb 5, 1988 | Dissolved |
| CAR WASHING SYSTEMS, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Mar 11, 1988 | Dissolved |
| SIMPLY BUSINESS, INCORPORATEDHigganum, CT · Dissolved | Higganum, CT | Corporation | Aug 12, 1988 | Dissolved |
| HIGGANUM-HADDAM SPORTSMAN'S CLUB, INC.Higganum, CT · Active | Higganum, CT | Corporation | Mar 6, 1989 | Active |
| STEFANO'S, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | May 2, 1989 | Forfeited |
| ATC, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Jun 6, 1989 | Dissolved |
| ME & MCGEE, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Jun 16, 1989 | Dissolved |
| BENNETT & SMILAS ASSOCIATES, INC.Higganum, CT · Active | Higganum, CT | Corporation | Sep 26, 1989 | Active |
| KENMARK ENTERPRISES, INC.Higganum, CT · Dissolved | Higganum, CT | Corporation | Dec 21, 1989 | Dissolved |
| THREE OAKS PLAZA CONDOMINIUM ASSOCIATION, INC.Higganum, CT · Active | Higganum, CT | Corporation | May 22, 1990 | Active |
| BECKER & SONS SHEET METAL, INC.Higganum, CT · Forfeited | Higganum, CT | Corporation | Feb 15, 1991 | Forfeited |
| BHE ASSOCIATION, INC.Higganum, CT · Active | Higganum, CT | Corporation | Jan 17, 1992 | Active |