| TRYLON ASSOCIATES, INC.Setauket, NY · Active | Setauket, NY | Corporation | Dec 19, 1988 | Active |
| RITE-WAY SANITATION CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | Oct 18, 1960 | Active |
| SIMPLY US CORP.Old Field, NY · Active | Old Field, NY | Corporation | Feb 9, 1989 | Active |
| THE INN AT STONY BROOK, INC.Old Field, NY · Active | Old Field, NY | Corporation | Jan 26, 1990 | Active |
| BATTLE REALTY, CORP.Setauket, NY · Active | Setauket, NY | Corporation | Nov 22, 1961 | Active |
| SKYLINE DRIVE PROPERTIES, INC.Setauket, NY · Active | Setauket, NY | Corporation | Nov 23, 1990 | Active |
| BIKAR ASSOCIATES OF TENNESSEE, INC.Old Field, NY · Active | Old Field, NY | Corporation | Sep 6, 1991 | Active |
| FORCP CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | Jan 7, 1992 | Active |
| HUNT GRAPHICS, INC.Setauket, NY · Active | Setauket, NY | Corporation | Jan 14, 1992 | Active |
| SUSAN LUSTIK, INC.Setauket, NY · Active | Setauket, NY | Corporation | Jan 30, 1992 | Active |
| TRITEC DEVELOPMENT, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Jun 8, 1993 | Active |
| TRI-CITY MASONS, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Mar 31, 1964 | Active |
| HTI INC.Strongs Neck, NY · Active | Strongs Neck, NY | Corporation | Jul 25, 1994 | Active |
| PENGUIN PROPERTIES, INC.Poquott, NY · Active | Poquott, NY | Corporation | Aug 10, 1994 | Active |
| PANACEA II, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Oct 11, 1994 | Active |
| RAMP MOTORS LEASING CORPORATIONSetauket, NY · Active | Setauket, NY | Corporation | Jan 11, 1967 | Active |
| 77 INDEPENDENCE CORP.Setauket, NY · Active | Setauket, NY | Corporation | Jun 20, 1967 | Active |
| RESEARCH ELECTRONICS DEVELOPMENT, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Sep 11, 1997 | Active |
| THE BUCKFIELD CORP.Setauket, NY · Active | Setauket, NY | Corporation | Feb 5, 1968 | Active |
| ELITE WINDOW TINTING, INC.Setauket, NY · Active | Setauket, NY | Corporation | Sep 18, 1998 | Active |
| 63 OCEAN DEVELOPMENT CORP.Setauket, NY · Active | Setauket, NY | Corporation | Sep 23, 1998 | Active |
| PAYNE & PALMIERI, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Nov 25, 1968 | Active |
| ARBOR HILL HOMES INC.Setauket, NY · Active | Setauket, NY | Corporation | Mar 3, 1999 | Active |
| ALLA PRIMA ARTS LTD.Poquott, NY · Active | Poquott, NY | Corporation | Dec 14, 1999 | Active |
| SCHMETZ INDUSTRIES, INC.Setauket, NY · Active | Setauket, NY | Corporation | Dec 13, 1972 | Active |
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| CENTEREACH PLAZA, INC.Old Field, NY · Active | Old Field, NY | Corporation | Mar 13, 1973 | Active |
| LOVELY LEITRIM, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Apr 27, 1973 | Active |
| SPENCER MADISON GROUP, INC.Poquott, NY · Active | Poquott, NY | Corporation | Jan 29, 2001 | Active |
| ROGERS & TAYLOR APPRAISERS, INC.Setauket, NY · Active | Setauket, NY | Corporation | Feb 26, 1969 | Active |
| USHER TREE EXPERTS INC.Setauket, NY · Active | Setauket, NY | Corporation | May 20, 1969 | Active |
| ARBOR REALTY CORP.Setauket, NY · Active | Setauket, NY | Corporation | Jun 20, 2002 | Active |
| EZ VENT CORP.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Sep 11, 2002 | Active |
| NORTH SUFFOLK PUBLISHING CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | Feb 6, 1970 | Active |
| NORTH SHORE THERAPEUTIC SPA & WELLNESS CENTER, INC.East Setauket, NY · Active | East Setauket, NY | Corporation | Jul 1, 2004 | Active |
| SARAY MANUFACTURING JEWELERS, LTD.East Setauket, NY · Active | East Setauket, NY | Corporation | May 17, 1971 | Active |
| 781 REALTY CORP.Setauket, NY · Active | Setauket, NY | Corporation | Oct 15, 1971 | Active |
| BIRCHTREE HOLDINGS INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Mar 11, 2005 | Active |
| J & H KRUSE CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | May 4, 2005 | Active |
| SWORDFISH REALTY ASSOCIATES, INC.E. Setauket, NY · Active | E. Setauket, NY | Corporation | Sep 9, 2005 | Active |
| OPENVOTINGSOLUTIONS INC.Poquott, NY · Active | Poquott, NY | Corporation | Nov 14, 2005 | Active |
| MVG SERVICES, INC.Old Field, NY · Active | Old Field, NY | Corporation | Nov 25, 2005 | Active |
| MIARITIS & CO., INC.Old Field, NY · Active | Old Field, NY | Corporation | Jan 19, 2006 | Active |
| 29 URBAN ATLANTIC MOVING CORP.East Setauket, NY · Active | East Setauket, NY | Corporation | Jan 15, 1975 | Active |
| POQUOTT CAPITAL MANAGEMENT, INC.Poquott, NY · Active | Poquott, NY | Corporation | Oct 30, 2009 | Active |
| THE PAMPERED KID, CORP.Setauket, NY · Active | Setauket, NY | Corporation | Jan 28, 2010 | Active |
| NEW HYDE PARK MEDICAL P.C.Neast Setauket, NY · Active | Neast Setauket, NY | Corporation | Mar 12, 2014 | Active |
| CAEMENTUM CONSTRUCTION, INC.Poquott, NY · Active | Poquott, NY | Corporation | Mar 24, 2015 | Active |
| FREUND-MAYER & CO., INCORPORATEDEast Setauket, NY · Active | East Setauket, NY | Corporation | Apr 5, 1945 | Active |
| LAW OFFICE OF BRYAN HEDLIND, LLCLocation not reported, OR · Active | Location not reported, OR | LLC | May 21, 2021 | Active |