| CRIPPLE CREEK GOLD MINING CORPORATIONLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Jan 26, 1961 | Good Standing |
| The Rapids Condominium Association, Inc.Grand Lake, CO · Good Standing | Grand Lake, CO | Nonprofit | Apr 19, 1983 | Good Standing |
| Kingstone Prato Holdings IncorporatedLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | May 23, 1984 | Good Standing |
| NORTHWESTERN ENGINEERING COMPANY>>Location not reported, CO · Good Standing | Location not reported, CO | Corporation | May 10, 1943 | Good Standing |
| THE SURETY INVESTMENT COMPANYLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Nov 25, 1893 | Good Standing |
| HDR ARCHITECTURE, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | May 14, 1957 | Good Standing |
| GEORGE C. BRANDT, INC.Denver, CO · Good Standing | Denver, CO | Corporation | Jun 19, 1964 | Good Standing |
| Erdman CompanyLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | May 1, 1968 | Good Standing |
| MECS, INCLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Jan 27, 1970 | Good Standing |
| Learning Ally, Inc.Location not reported, CO · Good Standing | Location not reported, CO | Nonprofit | May 5, 1970 | Good Standing |
| SUMMER INSTITUTE OF LINGUISTICS, INC.Location not reported, CO · Good Standing | Location not reported, CO | Nonprofit | Dec 20, 1971 | Good Standing |
| CONTAINER GRAPHICS CORP.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Nov 1, 1979 | Good Standing |
| THE FIDELITY INVESTMENT COMPANYLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Feb 1, 1923 | Good Standing |
| THE ROCKY MOUNTAIN SOCIETY OF ORTHODONTISTSLocation not reported, CO · Good Standing | Location not reported, CO | Nonprofit | Dec 5, 1941 | Good Standing |
| THE ASPEN INSTITUTE, INC.Location not reported, CO · Good Standing | Location not reported, CO | Nonprofit | Dec 9, 1949 | Good Standing |
| YELLOW QUEEN URANIUM CO.Denver, CO · Good Standing | Denver, CO | Corporation | Jan 3, 1955 | Good Standing |
| NAIFA-ColoradoLocation not reported, CO · Good Standing | Location not reported, CO | Nonprofit | Feb 3, 1958 | Good Standing |
| KINNICKINNIC REALTY CO., Dissolved December 31, 2025Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | Corporation | Aug 29, 1958 | Voluntarily Dissolved |
| Siegel Oil Co., LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Apr 27, 1959 | Good Standing |
| ANDERSON BURGESS AGENCY, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | May 2, 1961 | Good Standing |
| HUGHES COMPANYDenver, CO · Good Standing | Denver, CO | Corporation | Sep 29, 1967 | Good Standing |
| ACCOUNTING & TAX SERVICE, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Dec 19, 1968 | Good Standing |
| NELOWET BUSINESS MACHINES, LTD.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Oct 26, 1970 | Good Standing |
| THE COLORADO COUNCIL ON HIGH SCHOOL-COLLEGE RELATIONSDenver, CO · Good Standing | Denver, CO | Nonprofit | Mar 11, 1971 | Good Standing |
| LEONARD RICE CONSULTING WATER ENGINEERS, LLCDenver, CO · Good Standing | Denver, CO | LLC | Dec 30, 1971 | Good Standing |
| WESTERN STATES TELEMESSAGING ASSOCIATION INC.Location not reported, CO · Good Standing | Location not reported, CO | Nonprofit | Mar 29, 1972 | Good Standing |
| COLORADO AMATEUR HOCKEY ASSOCIATIONDenver, CO · Good Standing | Denver, CO | Nonprofit | Jul 20, 1972 | Good Standing |
| OLIPHANT ENTERPRISES, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Feb 22, 1973 | Good Standing |
| BAKER FOX DOG, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Apr 20, 1973 | Good Standing |
| MONTROSE ENTERPRISES, INC.Montrose, CO · Good Standing | Montrose, CO | Corporation | Jan 10, 1966 | Good Standing |
| HOCHSTADT, STRAW & SILVERMAN, P.C.Denver, CO · Good Standing | Denver, CO | Corporation | May 25, 1973 | Good Standing |
| DENVER BULLETS, INC.Colorado Springs, CO · Good Standing | Colorado Springs, CO | Corporation | May 13, 1974 | Good Standing |
| Colorado Enterprise Fund, Inc.Denver, CO · Good Standing | Denver, CO | Nonprofit | Sep 20, 1976 | Good Standing |
| ARNESS-MCGRIFFIN COAL COMPANYLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Sep 27, 1976 | Good Standing |
| Red Brick Council for the ArtsDenver, CO · Good Standing | Denver, CO | Nonprofit | Sep 29, 1972 | Good Standing |
| THE CENTER FOR PEOPLE WITH DISABILITIESBoulder, CO · Good Standing | Boulder, CO | Nonprofit | May 13, 1977 | Good Standing |
| MCCALLIN STEEL STORAGE SYSTEMS, INC.Commerce City, CO · Good Standing | Commerce City, CO | Corporation | Jan 3, 1978 | Good Standing |
| PATTERSON PROPERTIES (COLO.) INC., Dissolved September 4, 2026Location not reported, CO · Voluntarily Dissolved | Location not reported, CO | Corporation | Feb 9, 1978 | Voluntarily Dissolved |
| RED MOUNTAIN CORPORATIONDenver, CO · Good Standing | Denver, CO | Corporation | Mar 20, 1978 | Good Standing |
| CEMPCO, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Jul 18, 1978 | Good Standing |
| MANAGEMENT CONSULTANTS, INC.Denver, CO · Good Standing | Denver, CO | Corporation | Dec 1, 1978 | Good Standing |
| MOUNTAIN ASSOCIATES, INC.Denver, CO · Good Standing | Denver, CO | Corporation | Sep 20, 1979 | Good Standing |
| PLANO PETROLEUM CORPORATIONLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Jan 10, 1980 | Good Standing |
| COTTONWOOD VILLAS CONDOMINIUM ASSOCIATION, INC.Denver, CO · Good Standing | Denver, CO | Nonprofit | Feb 27, 1980 | Good Standing |
| WALKER CONSULTANTS, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Apr 2, 1980 | Good Standing |
| S. A. MIRO, INC.Denver, CO · Good Standing | Denver, CO | Corporation | Jul 15, 1980 | Good Standing |
| PROFESSIONAL PRIVATE INVESTIGATORS ASSOCIATION OF COLORADODenver, CO · Good Standing | Denver, CO | Nonprofit | Aug 20, 1980 | Good Standing |
| FRIENDS OF THE LONGMONT SENIOR CENTER, INC.Longmont, CO · Good Standing | Longmont, CO | Nonprofit | Apr 29, 1981 | Good Standing |
| ROCKY MOUNTAIN INSTITUTEBoulder, CO · Good Standing | Boulder, CO | Nonprofit | Apr 26, 1982 | Good Standing |
| CYPRUS THOMPSON CREEK MINING COMPANYLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Jun 1, 1982 | Good Standing |