| NORTH SHORE NURSERY, TREE AND LANDSCAPING, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Mar 14, 1986 | Active |
| ENGLEBRIGHT AGENCY INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Feb 25, 1986 | Active |
| POLE-TECH CO., INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Feb 5, 1986 | Active |
| CF PUBLICATIONS, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Dec 27, 1985 | Active |
| THREE VILLAGE CARDIOLOGY, P.C.East Setauket, NY · Active | East Setauket, NY | Corporation | Jun 21, 1984 | Active |
| DOVE ELECTRONIC COMPONENTS, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | May 10, 1983 | Active |
| ADVANCED RESEARCH MEDIA, INC.Poquott, NY · Active | Poquott, NY | Corporation | Mar 8, 1983 | Active |
| BRUCE E. HOAR, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Feb 16, 1983 | Active |
| TSCHUDIN GRINDING SYSTEMS INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Apr 1, 1981 | Active |
| MARINE CENTER SETAUKET LTD.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Oct 3, 1980 | Active |
| SCHWAB'S 2ND WIND, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Apr 17, 1980 | Active |
| T. T. M. RESTAURANT, LTD.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Mar 6, 1979 | Active |
| NORTH SHORE IMPORTS, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Sep 14, 1978 | Active |
| BOULDER WAY LANDSCAPING, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Feb 10, 1977 | Active |
| TUCKER-JONES HOUSE, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jun 6, 1975 | Active |
| PROGRESSIVE TRAVEL PROMOTIONS, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Feb 7, 1975 | Active |
| KINGS DEVELOPMENT CORP.Setauket, NY · Active | Setauket, NY | Corporation | Apr 22, 1986 | Active |
| ENTERPRISE ASPHALT PAVING INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jun 28, 1983 | Active |
| BROOKVILLE DENTAL LABORATORY, INC.Setauket, NY · Active | Setauket, NY | Corporation | Feb 8, 1982 | Active |
| MOMENTUS TECHNOLOGIES, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Dec 3, 2003 | Active |
| MILLENNIUM BIOTECHNOLOGY, INC.Setauket, NY · Active | Setauket, NY | Corporation | May 22, 1998 | Active |
| PBXSTORE, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Mar 20, 2001 | Active |
| SUN MEDICAL SYSTEMS, INC.Setauket, NY · Active | Setauket, NY | Corporation | Dec 23, 1997 | Active |
| DON'S FAMILY PLACE INC.Setauket, NY · Active | Setauket, NY | Corporation | Oct 11, 1996 | Active |
| PINSU INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Jan 28, 2010 | Active |
| JSS EDUCATIONAL CONSULTANTS, INC.Setauket, NY · Active | Setauket, NY | Corporation | Aug 11, 2004 | Active |
| LAW OFFICE OF BONNIE LAWSTON, PC, CORP.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 3, 2018 | Inactive |
| ADVANTAGE SOLUTIONS CORPORATIONEast Setauket, NY · Active | East Setauket, NY | Corporation | Nov 19, 1997 | Active |
| GALLO COURT INDUSTRIES INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jul 29, 1992 | Active |
| NAPA OF SETAUKET CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | Jun 21, 1989 | Active |
| MARTIN IRON AND CONSTRUCTION CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | May 1, 1986 | Active |
| PATRIOT PREFERRED NETWORK INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Nov 1, 2011 | Active |
| RSAZ TEAS, LTD.Setauket, NY · Active | Setauket, NY | Corporation | Nov 7, 2008 | Active |
| DREPAN FOODS, INC.Setauket, NY · Active | Setauket, NY | Corporation | Feb 10, 1998 | Active |
| CAP KEEPERS, INC.Setauket, NY · Active | Setauket, NY | Corporation | Jan 5, 1995 | Active |
| CHILDCARE OF MASSAPEQUA, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | May 4, 2007 | Active |
| IRONSTONE INDUSTRIES CORP.Setauket, NY · Active | Setauket, NY | Corporation | Jun 28, 2007 | Active |
| RJJ OF EAST SETAUKET, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jan 23, 2008 | Active |
| S.S.T. IMPROVEMENTS, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Jan 9, 2004 | Active |
| CULINARY ARTS OF LONG ISLAND, INC.Setauket, NY · Active | Setauket, NY | Corporation | Jan 14, 2003 | Active |
| SARDAR ALI KHAN M.D., P.C.Setauket, NY · Active | Setauket, NY | Corporation | Nov 22, 1999 | Active |
| A & J PROPERTIES OF NEW YORK INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jan 6, 2012 | Active |
| FOUR STAR LACROSS INC.Setauket, NY · Active | Setauket, NY | Corporation | Dec 13, 1991 | Active |
| J.B. ALARMS OF LONG ISLAND INC.Setauket, NY · Active | Setauket, NY | Corporation | Dec 24, 1985 | Active |
| PATATINIS INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jul 28, 2010 | Active |
| A&D CAPS, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jan 17, 2003 | Active |
| MITCHELL L. STEINBERG, D.P.M., P.C.Setauket, NY · Active | Setauket, NY | Corporation | Dec 22, 1981 | Active |
| OYSTER BAY BULLION, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Feb 10, 2012 | Active |
| TOUCH OF HEALTH NY MASSAGE P.C.East Setauket, NY · Active | East Setauket, NY | Corporation | Apr 28, 2011 | Active |
| SAPKIRTI REALTY CORP.Setauket, NY · Active | Setauket, NY | Corporation | Dec 15, 2008 | Active |