| CHESTNUT HILL BUS CORPORATION, THELocation not reported, CT · Merged | Location not reported, CT | Corporation | Dec 22, 1936 | Merged |
| VANGUARD INVESTORS CORPORATIONLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Jan 25, 1965 | Dissolved |
| CHICAGO PNEUMATIC INTERNATIONAL, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Apr 24, 1972 | Withdrawn |
| CHILD, INC. THELocation not reported, CT · Forfeited | Location not reported, CT | Corporation | May 3, 1973 | Forfeited |
| CHILDREN'S WEAR OF MERIDEN, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 29, 1974 | Active |
| CHIMNEY HEAT RECLAIMER CORP.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Mar 13, 1973 | Forfeited |
| CHINA YUM, LTD.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Dec 8, 1972 | Forfeited |
| NILCOR, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Feb 21, 1975 | Revoked |
| CHROMALLOY INTERNATIONAL CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 31, 1977 | Withdrawn |
| CHRYSLER LEASING CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Oct 8, 1962 | Withdrawn |
| CHUBB & SON INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Aug 3, 1959 | Active |
| CINEMA CONCEPTS INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Nov 1, 1973 | Forfeited |
| CINEMA WEST CORP.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | May 5, 1965 | Dissolved |
| CIRCLE F INDUSTRIES, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jan 17, 1972 | Withdrawn |
| CIRCLE PLAZA CVS, INC.Fairfield, CT · Dissolved | Fairfield, CT | Corporation | Nov 1, 1976 | Dissolved |
| CITICORP REAL ESTATE, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | May 12, 1977 | Revoked |
| CITIZENS DATA PROCESSING SYSTEMS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jul 20, 1977 | Withdrawn |
| CITY IRON WORKS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jan 21, 1969 | Withdrawn |
| W. A. KRUEGER CO. BRISTOLLocation not reported, CT · Merged | Location not reported, CT | Corporation | Jul 7, 1975 | Merged |
| VANCOM-CONNECTICUT, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Jul 1, 1960 | Dissolved |
| CLARKSON INDUSTRIES, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 13, 1976 | Revoked |
| CLAYTON CHICAGO OPTIONS COMPANYLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 27, 1975 | Withdrawn |
| CLEARFIELD CHEESE COMPANY, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 4, 1971 | Revoked |
| CLEVELAND TAPPING MACHINE CO.Location not reported, CT · Revoked | Location not reported, CT | Corporation | May 29, 1969 | Revoked |
| CLUB MANAGEMENT CONSULTANTS, LTD.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Feb 20, 1970 | Forfeited |
| COASTAL CABLE T.V., INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Nov 18, 1971 | Merged |
| COASTAL CRYOGENICS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 19, 1972 | Revoked |
| COBIA CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Oct 7, 1965 | Withdrawn |
| COCA-COLA BOTTLING COMPANY OF NEW YORK, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Feb 9, 1949 | Withdrawn |
| COCA-COLA COMPANY THELocation not reported, CT · Active | Location not reported, CT | Corporation | Jan 3, 1961 | Active |
| COFFEE SYSTEM, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jun 15, 1970 | Withdrawn |
| COHERENT ASSOCIATES, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Feb 14, 1972 | Revoked |
| COLLEGE POINT DRY DOCK AND SUPPLY CO. INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 7, 1970 | Revoked |
| COLLEGIATE PRODUCTS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 23, 1974 | Revoked |
| COLLYER ASSOCIATES, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Aug 8, 1966 | Revoked |
| COLONIAL FUEL COMPANY, INC. THELocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Aug 3, 1953 | Dissolved |
| COLONIAL SAND & STONE CO., INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Aug 7, 1963 | Revoked |
| COLONIAL TWINE COMPANY (EAST) INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 9, 1961 | Revoked |
| COLORCRAFT CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 26, 1972 | Revoked |
| COLT INDUSTRIES OPERATING CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 8, 1964 | Withdrawn |
| COMBUSTION ENGINEERING, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 7, 1955 | Active |
| COMBUSTION ENGINEERING OVERSEAS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Dec 3, 1962 | Revoked |
| COMCAST SOUND COMMUNICATIONS, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Dec 10, 1973 | Merged |
| COMET OFFICE EQUIPMENT CENTER OF BRIDGEPORT, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Oct 16, 1969 | Forfeited |
| COMMERCIAL CREDIT INDUSTRIAL CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | May 21, 1964 | Revoked |
| COMMERCIAL INFORMATION CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 1, 1971 | Revoked |
| COMMONWEALTH TRADING INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 9, 1971 | Revoked |
| NICOM INDUSTRIES, INC.Torrington, CT · Active | Torrington, CT | Corporation | Aug 23, 1973 | Active |
| COMP SHOP, INC. THELocation not reported, CT · Revoked | Location not reported, CT | Corporation | Oct 15, 1976 | Revoked |
| COMPASS ASSET MANAGEMENT, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | May 14, 1973 | Forfeited |