| Aristocrat Land & Cattle, Inc., Dissolved December 7, 1994Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Apr 13, 1972 | Voluntarily Dissolved |
| THE VENIR MINING COMPANY, Dissolved May 31, 2005Platteville, CO · Administratively Dissolved | Platteville, CO | Corporation | Dec 8, 1902 | Administratively Dissolved |
| THE MEADOW ISLAND DITCH COMPANY NO. TWO (2)Platteville, CO · Good Standing | Platteville, CO | Nonprofit | Mar 2, 1903 | Good Standing |
| THE WESTERN MUTUAL DITCH COMPANYPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Mar 15, 1909 | Good Standing |
| CLENNON LATERAL DITCH COMPANYPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Apr 16, 1910 | Good Standing |
| THE ERKENBECK LATERAL DITCH COMPANYPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Mar 9, 1911 | Good Standing |
| THE NEW SAND CREEK LATERAL IRRIGATION COMPANYPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Jun 8, 1923 | Good Standing |
| PLATTEVILLE POTATO ASSOCIATION, INC., Dissolved December 27, 2000Platteville, CO · Voluntarily Dissolved | Platteville, CO | Other | Jul 10, 1941 | Voluntarily Dissolved |
| PLATTEVILLE LIONS CLUB, Delinquent October 1, 2013Platteville, CO · Delinquent | Platteville, CO | Nonprofit | May 8, 1957 | Delinquent |
| SMITS FARMS, INC., Dissolved January 19, 2011Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Nov 22, 1963 | Voluntarily Dissolved |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH OF PLATTEVILLEPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Dec 13, 1966 | Good Standing |
| BOULDER VALLEY LITTLE BRITCHES RODEO, INC., Delinquent September 1, 2007Platteville, CO · Delinquent | Platteville, CO | Nonprofit | Apr 24, 1967 | Delinquent |
| INDUSTRIAL PROPERTIES, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | May 14, 1971 | Good Standing |
| ULRICH FARMS, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Jun 6, 1973 | Good Standing |
| G.P.S., INC., Delinquent July 1, 2012Platteville, CO · Delinquent | Platteville, CO | Corporation | Jan 13, 1977 | Delinquent |
| CHUCK'S INSULATION SERVICE, INC., Dissolved May 1, 2004Platteville, CO · Administratively Dissolved | Platteville, CO | Corporation | Nov 8, 1977 | Administratively Dissolved |
| SOUTH PLATTE AREA CHAMBER OF COMMERCE, Delinquent February 1, 2006Platteville, CO · Delinquent | Platteville, CO | Nonprofit | Dec 1, 1978 | Delinquent |
| DOUBLE TREE X, LTD., Dissolved March 5, 2001Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Aug 15, 1979 | Voluntarily Dissolved |
| RAY'S FOUR SEASONS CONCRETE CORPORATIONPlatteville, CO · Good Standing | Platteville, CO | Corporation | Aug 20, 1979 | Good Standing |
| MORNING FRESH FARMS, LLCPlatteville, CO · Good Standing | Platteville, CO | LLC | Oct 11, 1979 | Good Standing |
| WEBBER CATTLE CO.Platteville, CO · Good Standing | Platteville, CO | Corporation | Sep 3, 1980 | Good Standing |
| SHARP TRUCKING, INC., Delinquent December 1, 2010Platteville, CO · Delinquent | Platteville, CO | Corporation | Dec 10, 1980 | Delinquent |
| ECKSTINE ELECTRIC CO.Platteville, CO · Good Standing | Platteville, CO | Corporation | Nov 18, 1981 | Good Standing |
| SOUTH WELD AG., INC., Dissolved September 23, 2004Platteville, CO · Administratively Dissolved | Platteville, CO | Corporation | Jan 11, 1982 | Administratively Dissolved |
| MOUNTAIN CONSTRUCTORS, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Nov 3, 1982 | Good Standing |
| MEAD FISHING CLUBPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Aug 27, 1984 | Good Standing |
| LONGMONT PROFESSIONALS, INC., Dissolved August 5, 2025Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Feb 19, 1985 | Voluntarily Dissolved |
| RICHLAWN TURF FOOD LLCPlatteville, CO · Good Standing | Platteville, CO | LLC | Jan 3, 1986 | Good Standing |
| MORNING FRESH TRANSPORTATION, LLCPlatteville, CO · Good Standing | Platteville, CO | LLC | Jan 3, 1986 | Good Standing |
| COLORADO WIRE CLOTH, INC., Dissolved November 1, 1998Platteville, CO · Administratively Dissolved | Platteville, CO | Corporation | Jan 6, 1986 | Administratively Dissolved |
| WELD L-P GAS CO., INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Jan 22, 1986 | Good Standing |
| McKee Excavating & Contracting Inc., Delinquent June 1, 2009Platteville, CO · Delinquent | Platteville, CO | Corporation | Apr 14, 1986 | Delinquent |
| FARLEY'S MACHINE, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Jan 1, 1987 | Good Standing |
| THE PLATTEVILLE SENIOR CITIZEN ASSOCIATIONPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Dec 2, 1986 | Good Standing |
| D.C.J., INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Jul 15, 1987 | Good Standing |
| FARLEY SHAVINGS, INC., Dissolved July 3, 2002Platteville, CO · Administratively Dissolved | Platteville, CO | Corporation | Sep 3, 1987 | Administratively Dissolved |
| HAGERDON, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Sep 9, 1987 | Good Standing |
| CLASSIC FOOD PRODUCTS, INC., Dissolved March 8, 2007Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Jul 20, 1988 | Voluntarily Dissolved |
| WOOD RECOVERY SYSTEMS, INC., Dissolved May 15, 2007Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | May 18, 1989 | Voluntarily Dissolved |
| AGSTAR, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Dec 28, 1989 | Good Standing |
| METROPOLITAN COALITION OF POLICE-SHERIFFS LOCAL 35 I.U.P.A.AFL-CIO, Dissolved August 15, 2008Platteville, CO · Voluntarily Dissolved | Platteville, CO | Nonprofit | Mar 29, 1991 | Voluntarily Dissolved |
| ART'S SANITATION SERVICE, INC., Dissolved February 21, 2019Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Jun 26, 1991 | Voluntarily Dissolved |
| B.A.R. ELECTRIC COMPANY, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Aug 19, 1991 | Good Standing |
| BELLA HOLSTEINS, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Nov 13, 1991 | Good Standing |
| ENVIRONMENTAL MINING CORPORATION, Delinquent April 1, 2015Platteville, CO · Delinquent | Platteville, CO | Corporation | Jan 22, 1992 | Delinquent |
| RAY DOMENICO FARMS, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Jan 22, 1992 | Good Standing |
| THE PLATTEVILLE IRRIGATING AND MILLING COMPANYPlatteville, CO · Good Standing | Platteville, CO | Nonprofit | Feb 3, 1992 | Good Standing |
| KDB CONSTRUCTION, INC., Dissolved September 1, 2021Platteville, CO · Voluntarily Dissolved | Platteville, CO | Corporation | Mar 5, 1992 | Voluntarily Dissolved |
| PRO MOTION RACING PRODUCTIONS, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Apr 29, 1992 | Good Standing |
| AKERS, INC.Platteville, CO · Good Standing | Platteville, CO | Corporation | Jun 3, 1992 | Good Standing |