| CON PAN COURT, LLCMiami, FL · Active | Miami, FL | LLC | Nov 7, 2022 | Active |
| CON LES FALLS, LLCMiami, FL · Active | Miami, FL | LLC | Nov 3, 2022 | Active |
| CON FAMILY HOLDINGS HOMESTEAD R/E, LLCMiami, FL · Active | Miami, FL | LLC | Apr 23, 2021 | Active |
| CON FAMILY HOLDINGS, LLCMiami, FL · Active | Miami, FL | LLC | Apr 23, 2021 | Active |
| DUMBBELL, LLCMiami, FL · Active | Miami, FL | LLC | Apr 1, 2021 | Active |
| F & C SERVICES, INC.Hollywood, FL · Inactive | Hollywood, FL | Corporation | Jul 28, 1966 | Inactive |
| COLLINSWORTH, NIELSON & ASSOCIATES, INC.Hialeah, FL · Inactive | Hialeah, FL | Corporation | Nov 16, 1973 | Inactive |
| STINSON DRYWALL INC.Miami, FL · Inactive | Miami, FL | Corporation | Jun 21, 1974 | Inactive |
| COLLINSWORTH & NIELSON, INC.Delray Beach, FL · Inactive | Delray Beach, FL | Corporation | Mar 19, 1975 | Inactive |
| M. G. A., INC.Miami, FL · Inactive | Miami, FL | Corporation | Nov 5, 1976 | Inactive |
| M.P.W., INC.Naples, FL · Inactive | Naples, FL | Corporation | Nov 9, 1976 | Inactive |
| F & C HOLDING COMPANY, INC.Hollywood, FL · Inactive | Hollywood, FL | Corporation | Jul 26, 1979 | Inactive |
| MIAMI LIGHTHOUSE FOR THE BLIND AND VISUALLY IMPAIRED, INC.Miami, FL · Active | Miami, FL | Nonprofit | Feb 1, 1980 | Active |
| NIELSON, FENSTERMACHER AND COMPANY, INC.Miami, FL · Inactive | Miami, FL | Corporation | Apr 15, 1982 | Inactive |
| SCN FINANCIAL CORPORATIONMiami, FL · Inactive | Miami, FL | Corporation | Dec 12, 1983 | Inactive |
| NIELSON-HOOVER, L.L.C.Miami Lakes, FL · Inactive | Miami Lakes, FL | LLC | May 18, 2005 | Inactive |
| 14985 NW 27TH, LLCHialeah, FL · Inactive | Hialeah, FL | LLC | Feb 13, 2007 | Inactive |
| CONSTRUCTION RISK PARTNERS, LLCMiami Lakes, FL · Inactive | Miami Lakes, FL | LLC | Aug 11, 2008 | Inactive |
| PIPELINE CONSTRUCTION INSURANCE AND BONDS, LLCMiami Lakes, FL · Inactive | Miami Lakes, FL | LLC | Apr 21, 2009 | Inactive |
| NIELSON NIPPER CAPITAL INVESTMENT VENTURE, LLCMiami, FL · Inactive | Miami, FL | LLC | Sep 20, 2019 | Inactive |
| NIELSON, ALTER & ASSOCIATES, INCORPOATEDMiami Lakes, FL · Inactive | Miami Lakes, FL | Corporation | Mar 6, 2000 | Inactive |
| NOSLEIN HOLDINGS, INC.Miami Lakes, FL · Inactive | Miami Lakes, FL | Corporation | Jul 13, 2001 | Inactive |
| REVOOH, INC.Miami Lakes, FL · Inactive | Miami Lakes, FL | Corporation | May 2, 2003 | Inactive |
| GROUPNOSLEIN, INC.Hialeah, FL · Inactive | Hialeah, FL | Corporation | Jan 5, 2016 | Inactive |