| Brown's of Bellport, INC | Retail Trade | $2,204,968 | $2,231,379 | 131 | $33.0M |  Research |
| Economic Opportunity Council of Suffolk, Inc. | Other Services (except Public Administration) | $2,128,000 | $2,151,729 | 334 | N/A | Research |
| Brown's of Bellport Inc. | Retail Trade | $1,857,405 | $1,868,175 | 146 | $36.8M | Research |
| Bbs Architects Landscape Architects& Eng | Professional, Scientific, and Technical Services | $1,364,097 | $1,379,793 | 74 | $22.9M | Research |
| Nissan 112 Sales Corp. | Retail Trade | $1,338,300 | $1,349,824 | 111 | $28.0M | Research |
| Sweezy Fuel Co., Inc. | Wholesale Trade | $1,322,300 | $1,330,932 | 79 | $20.3M | Research |
| Bbs Architects, Landscape Architects and Engineers P.c. | Professional, Scientific, and Technical Services | $1,260,700 | $1,274,965 | 74 | $22.9M | Research |
| Suffolk Centerreceiver LLC | Health Care and Social Assistance | $1,240,502 | $1,256,612 | 101 | $17.2M | Research |
| Suffolk Center Receiver, LLC | Health Care and Social Assistance | $1,240,502 | $1,255,388 | 104 | $17.7M | Research |
| Baron Brothers Auto Group INC | Retail Trade | $1,120,373 | $1,135,531 | 64 | $16.1M | Research |
| Rosemar Contracting Corp | Construction | $1,032,000 | $1,044,413 | 74 | $25.2M | Research |
| Island Time - 1 Ocean Pkwy LLC | Accommodation and Food Services | $985,974 | $996,158 | 74 | $13.1M | Research |
| Patchogue 112 Motors LLC | Retail Trade | $960,100 | $966,901 | 64 | $16.1M | Research |
| Patchogue 112 Motors LLC | Retail Trade | $960,100 | $970,501 | 55 | $8.6M | Research |
| Island Time Hospitality Group LLC | Accommodation and Food Services | $908,446 | $917,829 | 46 | $8.2M | Research |
| Baron Brothers Auto Group Inc. | Retail Trade | $745,390 | $754,075 | 51 | $12.9M | Research |
| Brookhaven Physician Services PC | Health Care and Social Assistance | $721,835 | $730,958 | 51 | $16.0M | Research |
| Dublin Deck INC | Accommodation and Food Services | $629,678 | $633,818 | 107 | $19.0M | Research |
| Bms Riverside INC | Accommodation and Food Services | $578,211 | $583,644 | 109 | $19.4M | Research |
| Rhum Patchogue LLC | Accommodation and Food Services | $507,087 | $513,158 | 60 | $10.7M | Research |
| Long Island Environmental Assessment INC | Administrative and Support and Waste Management | $493,200 | $497,255 | 35 | $6.6M | Research |
| Hampton Drainage & Paving Corp. | Administrative and Support and Waste Management | $491,200 | $494,461 | 34 | $6.4M | Research |
| Hampton Drainage & Paving | Construction | $491,155 | $497,493 | 34 | $10.8M | Research |
| Argostoli Corporation | Accommodation and Food Services | $455,000 | $458,425 | 49 | $8.7M | Research |
| All Pro Medical Supplies Inc. | Retail Trade | $424,212 | $428,381 | 56 | $9.8M | Research |