| KORACORP INDUSTRIES INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Apr 5, 1973 | Withdrawn |
| KOREN - DI RESTA CONSTRUCTION CO. INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 5, 1970 | Revoked |
| KRAMER TRADING CORPORATION OF CONNECTICUT, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 17, 1977 | Revoked |
| AGFA NDT INC.Amston, CT · Merged | Amston, CT | Corporation | Jun 7, 1962 | Merged |
| KULO CORPORATIONLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Apr 6, 1967 | Dissolved |
| L. DE L. SALES COMPANYLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Jan 21, 1974 | Dissolved |
| LFC LEASING AND FINANCIAL CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Apr 24, 1970 | Revoked |
| L.G.BALFOUR COMPANYLocation not reported, CT · Revoked | Location not reported, CT | Corporation | May 28, 1956 | Revoked |
| L & J ASSOCIATES OF CONNECTICUT, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Jul 11, 1969 | Dissolved |
| L. J. G. CONSTRUCTION INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 17, 1977 | Revoked |
| L & M AMBULANCE CORPORATIONWest Hartford, CT · Merged | West Hartford, CT | Corporation | Oct 26, 1965 | Merged |
| LRA, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Dec 15, 1976 | Dissolved |
| L-R METAL TREATING CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 24, 1967 | Revoked |
| L. T. DOBEY, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 27, 1972 | Revoked |
| L W PIERCE CO INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 18, 1975 | Revoked |
| LABORATORY FOR CLINICAL MEDICINE, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Jul 16, 1962 | Forfeited |
| LAKE AVENUE ASSOCIATES, INC.Danbury, CT · Active | Danbury, CT | Corporation | Nov 2, 1973 | Active |
| LAKEWOOD METAL PRODUCTS, INCORPORATEDLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Feb 7, 1949 | Dissolved |
| LAND/VEST, INCORPORATEDLocation not reported, CT · Revoked | Location not reported, CT | Corporation | May 1, 1970 | Revoked |
| LANIER BUSINESS PRODUCTS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 20, 1977 | Revoked |
| LASKER-GOLDMAN CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | May 8, 1967 | Revoked |
| LAU-JUN HOLDING CORPORATION THEWestport, CT · Forfeited | Westport, CT | Corporation | Aug 8, 1968 | Forfeited |
| LEAGUE INSURANCE AGENCY, INC.New Britain, CT · Merged | New Britain, CT | Corporation | Aug 16, 1973 | Merged |
| LEAR SIEGLER, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jul 24, 1962 | Withdrawn |
| LEASCO CAPITAL EQUIPMENT CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Feb 23, 1968 | Withdrawn |
| LEASCO CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Dec 18, 1973 | Revoked |
| LEASCO RESPONSE INCORPORATEDLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Mar 29, 1972 | Withdrawn |
| LEASEWAY FLEETS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Mar 1, 1976 | Withdrawn |
| LEASEWAY-EMPIRE, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 2, 1968 | Revoked |
| LECK INDUSTRIES OF CONNECTICUT, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Nov 20, 1959 | Dissolved |
| LEE TURZILLO CONTRACTING COMPANYLocation not reported, CT · Revoked | Location not reported, CT | Corporation | May 9, 1969 | Revoked |
| L'EGGS PRODUCTS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Mar 25, 1971 | Withdrawn |
| HM LEHIGH SAFETY SHOE CO., INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 17, 1976 | Withdrawn |
| LEISURE MARKETING SERVICES, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Sep 22, 1969 | Withdrawn |
| LEISURE VILLAGE-LEISURETOWNE, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Oct 29, 1969 | Dissolved |
| LEVITT ENVIRONMENTAL TECHNOLOGY CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jun 30, 1972 | Withdrawn |
| LSI MULTIHOUSING CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jun 29, 1970 | Withdrawn |
| LSI PROPERTY MANAGEMENT CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 23, 1973 | Withdrawn |
| LSI RESIDENTIAL COMMUNITIES, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 17, 1975 | Revoked |
| LSI UNITED CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Feb 26, 1976 | Withdrawn |
| LEWIS REFRIGERATION CO.Location not reported, CT · Revoked | Location not reported, CT | Corporation | May 4, 1976 | Revoked |
| LEXINGTON GARDENS, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Dec 20, 1971 | Merged |
| LIFE UNIFORM COMPANY OF CONNECTICUTLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Jun 28, 1974 | Dissolved |
| LIFE UNIFORM COMPANY OF MERIDENLocation not reported, CT · Merged | Location not reported, CT | Corporation | Jun 28, 1974 | Merged |
| CARE HEALTH SERVICES OF CONNECTICUT, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Jul 9, 1976 | Forfeited |
| LILLY PULITZER OF NEW CANAAN, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 11, 1976 | Revoked |
| LINCOLN ELECTRIC COMPANY, THELocation not reported, CT · Active | Location not reported, CT | Corporation | Apr 20, 1961 | Active |
| LINCOLN NATIONAL CAREER DEVELOPMENT CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jan 24, 1975 | Withdrawn |
| LINPRO COMPANY THELocation not reported, CT · Revoked | Location not reported, CT | Corporation | Aug 9, 1973 | Revoked |
| BODYCOTE THERMAL PROCESSING, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 13, 1976 | Active |