| St. Mary's Holy Dormition Orthodox Church, Inc.Calhan, CO · Good Standing | Calhan, CO | Nonprofit | Feb 14, 1929 | Good Standing |
| THE EL PASO COUNTY FAIR ASSOCIATIONCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Aug 16, 1929 | Good Standing |
| FARMERS STATE BANK OF CALHANCalhan, CO · Good Standing | Calhan, CO | Corporation | Jul 26, 1916 | Good Standing |
| LIONS CLUB OF CALHANCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Jun 30, 1948 | Good Standing |
| PIKES PEAK COOPERATIVE ASSOCIATION, Dissolved March 22, 2012Calhan, CO · Voluntarily Dissolved | Calhan, CO | Other | Jul 5, 1962 | Voluntarily Dissolved |
| Schubert Ranches, LLCCalhan, CO · Converted | Calhan, CO | LLC | Apr 14, 1966 | Converted |
| COLORADO BABE RUTH LEAGUE, INC.Calhan, CO · Good Standing | Calhan, CO | Nonprofit | Jul 1, 1966 | Good Standing |
| GLASER GAS, INCORPORATED, Dissolved March 30, 2015Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Jan 25, 1968 | Voluntarily Dissolved |
| GADDY TRUCK SERVICE, INC., Delinquent June 1, 2005Calhan, CO · Delinquent | Calhan, CO | Corporation | Apr 4, 1968 | Delinquent |
| BIG VALLEY SOD FARMS, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | May 22, 1968 | Good Standing |
| Ellicott Baptist ChurchCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Mar 28, 1968 | Good Standing |
| HERTNEKY E & S RANCH, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Apr 23, 1970 | Good Standing |
| BERT SKAGGS, INC., Dissolved November 1, 2008Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Apr 4, 1972 | Voluntarily Dissolved |
| PIEPER BANCORP, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Feb 28, 1974 | Good Standing |
| WOOLSEYS FOOD CENTER INC., Dissolved January 14, 2009Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | May 10, 1974 | Voluntarily Dissolved |
| PIEPER & SONS INSURANCE AGENCY, INC., Dissolved September 30, 2016Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Oct 22, 1974 | Voluntarily Dissolved |
| pikes peak quarter midgets association incCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Dec 16, 1974 | Good Standing |
| M - D, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Apr 4, 1975 | Good Standing |
| RESKURTAS-WEST, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | May 16, 1975 | Good Standing |
| CALHAN UNITED METHODIST CHURCHCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Dec 30, 1975 | Good Standing |
| DUNN AND SONS, INC., Dissolved September 23, 2004Calhan, CO · Administratively Dissolved | Calhan, CO | Corporation | Mar 3, 1977 | Administratively Dissolved |
| B. AND R. SERVICES CORPORATION, Delinquent September 1, 2019Calhan, CO · Delinquent | Calhan, CO | Corporation | Mar 21, 1977 | Delinquent |
| ONLINE DATA SYSTEMS, INC., Dissolved June 1, 1999Calhan, CO · Administratively Dissolved | Calhan, CO | Corporation | Aug 24, 1978 | Administratively Dissolved |
| ELLICOTT FLYING SERVICE,INC., Delinquent August 1, 2007Calhan, CO · Delinquent | Calhan, CO | Corporation | Feb 26, 1979 | Delinquent |
| LIVING WORD COMMUNITY CHURCHCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Mar 22, 1982 | Good Standing |
| MITCHELL CONCRETE & EXCAVATING, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Jun 25, 1982 | Good Standing |
| STEVENS FAMILY RACING INC., Delinquent February 1, 2025Calhan, CO · Delinquent | Calhan, CO | Corporation | Sep 28, 1982 | Delinquent |
| T D C, INC., Delinquent July 1, 2006Calhan, CO · Delinquent | Calhan, CO | Corporation | May 24, 1983 | Delinquent |
| JAY HART MASONRY INCORPORATED, Delinquent January 1, 2008Calhan, CO · Delinquent | Calhan, CO | Corporation | Aug 3, 1983 | Delinquent |
| Ellicott First Community ChurchCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Oct 21, 1983 | Good Standing |
| TAO TAO GARDEN, INC., Delinquent July 1, 2010Calhan, CO · Delinquent | Calhan, CO | Corporation | Feb 22, 1984 | Delinquent |
| SOUTHRIDGE DEVELOPMENT COMPANYCalhan, CO · Good Standing | Calhan, CO | Corporation | Jun 25, 1984 | Good Standing |
| OPEN DOOR COMMUNITY CHURCH OF ELLICOTTCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Jun 27, 1984 | Good Standing |
| CLARENCE G. DZURIS POST #5221 - VFWCalhan, CO · Good Standing | Calhan, CO | Nonprofit | Jun 7, 1985 | Good Standing |
| ELLICOTT EXTENSION HOMEMAKERS CLUB, Dissolved May 1, 2002Calhan, CO · Administratively Dissolved | Calhan, CO | Nonprofit | Jul 1, 1985 | Administratively Dissolved |
| LIO AUTRY LIMITEDCalhan, CO · Good Standing | Calhan, CO | Corporation | Sep 27, 1985 | Good Standing |
| ANDERSON HOMES, INC., Delinquent May 1, 2008Calhan, CO · Delinquent | Calhan, CO | Corporation | Nov 5, 1985 | Delinquent |
| SPRINGS EAST AIRPORT, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Apr 10, 1986 | Good Standing |
| ROCKY MOUNTAIN ROOSTERS INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | May 5, 1986 | Good Standing |
| VERVERS SALES, INC., Dissolved July 14, 2007Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Jun 20, 1986 | Voluntarily Dissolved |
| K & J TRUCKING, INC., Dissolved June 23, 2023Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Jul 21, 1986 | Voluntarily Dissolved |
| GOOD GUYS INC., Dissolved March 1, 2016Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Aug 1, 1986 | Voluntarily Dissolved |
| INDUSTRIAL REPAIR SERVICE, INC., Dissolved September 21, 2023Calhan, CO · Voluntarily Dissolved | Calhan, CO | Corporation | Sep 17, 1986 | Voluntarily Dissolved |
| SANTE FE AUTO & TRUCK COMPANY, INC., Delinquent April 1, 2012Calhan, CO · Delinquent | Calhan, CO | Corporation | Apr 1, 1987 | Delinquent |
| BIG JIM'S, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Jun 6, 1988 | Good Standing |
| ARK LAND SERVICES, INC., Delinquent September 1, 2010Calhan, CO · Delinquent | Calhan, CO | Corporation | Mar 9, 1990 | Delinquent |
| CALHAN AUCTION MARKET, INC.Calhan, CO · Good Standing | Calhan, CO | Corporation | Jun 21, 1990 | Good Standing |
| J & M Enterprises, Inc., Delinquent July 1, 2018Calhan, CO · Delinquent | Calhan, CO | Corporation | Dec 17, 1990 | Delinquent |
| RAINBOW MINISTRIES, Dissolved June 1, 2004Calhan, CO · Administratively Dissolved | Calhan, CO | Nonprofit | Aug 19, 1991 | Administratively Dissolved |
| COLORADO ANIMAL REFUGE, INC., Dissolved July 1, 1998Calhan, CO · Administratively Dissolved | Calhan, CO | Nonprofit | Sep 25, 1991 | Administratively Dissolved |