| HAMPDEN OIL CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Dec 28, 1966 | Withdrawn |
| HANDI-PHOTO, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 7, 1977 | Revoked |
| HARCOSEMCO LLCBranford, CT · Active | Branford, CT | LLC | Sep 23, 1954 | Active |
| HARCOURT REALTY CO., INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Nov 7, 1956 | Merged |
| HARD SAILS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 28, 1972 | Withdrawn |
| HARDING-WILLIAMS DIXIE CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 13, 1967 | Revoked |
| HARRIS DATA COMMUNICATIONS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Oct 9, 1973 | Withdrawn |
| HARRY F. ORTLIP COMPANYLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 7, 1974 | Revoked |
| HARRY HALLORAN & SONS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jul 1, 1968 | Revoked |
| HARRY R. DUBBS & SONS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 15, 1976 | Revoked |
| HARSHAW CHEMICAL COMPANY THELocation not reported, CT · Revoked | Location not reported, CT | Corporation | Oct 9, 1975 | Revoked |
| HART ENGINEERING CO.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Apr 3, 1956 | Revoked |
| HARTCON, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Apr 26, 1961 | Merged |
| HARTFORD CATV, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | May 3, 1967 | Dissolved |
| HIMCO DISTRIBUTION SERVICES COMPANYHartford, CT · Dissolved | Hartford, CT | Corporation | Jul 3, 1973 | Dissolved |
| HARTFORD-GREENWOOD NURSING HOME, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Mar 10, 1971 | Forfeited |
| HARTFORD SURGICAL CENTER, INC.Hartford, CT · Merged | Hartford, CT | Corporation | Jun 12, 1975 | Merged |
| HARTLEY & PARKER, LIMITED, LLCStratford, CT · Active | Stratford, CT | LLC | Apr 13, 2023 | Active |
| HAR-TRU CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Apr 3, 1972 | Revoked |
| HARVEY TRAVEL, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Dec 6, 1972 | Revoked |
| HAYMAN MANAGEMENT COMPANYLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 28, 1977 | Revoked |
| HEALTH APPLICATION SYSTEMS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Sep 18, 1975 | Withdrawn |
| HEALTH & BEAUTY AIDS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Aug 11, 1960 | Revoked |
| HEALTHMART NUTRITION CENTERS INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 7, 1971 | Revoked |
| HEEDE HOIST AND MACHINE CO., INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Apr 22, 1974 | Withdrawn |
| HELEN GALLAGHER'S KALEIDOSCOPE OF CONNECTICUT, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Apr 30, 1976 | Revoked |
| HELENA CHEMICAL COMPANYLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jul 22, 1974 | Withdrawn |
| HELIKON FURNITURE COMPANY, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Jan 9, 1969 | Forfeited |
| HENLOPEN MANUFACTURING CO., INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jul 5, 1977 | Revoked |
| HENRY F. RAAB CONNECTICUT INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Aug 31, 1976 | Forfeited |
| HENRY F. TEICHMANN, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Oct 6, 1965 | Revoked |
| HERCULES CHEMICAL CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Dec 4, 1944 | Withdrawn |
| HERITAGE DOOR COMPANYLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 27, 1967 | Revoked |
| HERITAGE WOODS CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 3, 1972 | Revoked |
| HERTZ CORPORATION THELocation not reported, CT · Active | Location not reported, CT | Corporation | Apr 24, 1967 | Active |
| HERC RENTALS INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 21, 1969 | Active |
| HEXCEL CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Dec 16, 1971 | Withdrawn |
| HICKORY FARMS SALES CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jul 10, 1972 | Revoked |
| HIGHLAND DISTRIBUTORS, INCORPORATEDLocation not reported, CT · Forfeited | Location not reported, CT | Corporation | Sep 11, 1975 | Forfeited |
| HILL RESTAURANTS, INC.Rocky Hill, CT · Dissolved | Rocky Hill, CT | Corporation | Oct 19, 1976 | Dissolved |
| HILTON LIFETIME HOMES CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 28, 1972 | Revoked |
| HIP POCKET OF CONNECTICUT, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Aug 29, 1974 | Forfeited |
| HOBART-MCINTOSH PAPER COMPANYLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jan 15, 1975 | Withdrawn |
| HOBSON AND MOTZER, LLCDurham, CT · Active | Durham, CT | Corporation | Jun 3, 2024 | Active |
| HOENIG & CO., INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 28, 1970 | Revoked |
| HOFFEND & SONS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Dec 22, 1976 | Revoked |
| HOFFMAN ELECTRONICS CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Feb 7, 1955 | Revoked |
| HOFFRITZ FOR CUTLERY, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 2, 1970 | Revoked |
| EXPORT CONTRACT CORPORATIONLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Aug 29, 1960 | Dissolved |
| HOWMEDICA PRODUCTS OF CONNECTICUT, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Oct 16, 1951 | Dissolved |