| Headcount Management INC | Professional, Scientific, and Technical Services | $1,402,972 | $1,416,079 | 100 | $31.8M |  Research |
| Operations INC | Professional, Scientific, and Technical Services | $1,279,800 | $1,287,303 | 94 | $9.7M | Research |
| L'amy, Incorporated | Wholesale Trade | $1,279,200 | $1,289,118 | 103 | $31.6M | Research |
| Wusthof USA INC | Wholesale Trade | $1,265,100 | $1,275,255 | 88 | $22.7M | Research |
| 365 Operating Company LLC | Information | $1,227,977 | $0 | 72 | $12.1M | Research |
| Zillion Group Inc. | Information | $1,207,220 | $1,217,473 | 76 | $12.8M | Research |
| Smartequip, Inc. | Professional, Scientific, and Technical Services | $1,198,600 | $1,204,626 | 65 | $13.4M | Research |
| Inspira Marketing Group, LLC | Transportation and Warehousing | $1,175,000 | $1,182,597 | 58 | $14.7M | Research |
| Halstead New England Corporation | Wholesale Trade | $1,174,800 | $1,191,378 | 77 | $23.6M | Research |
| Shoff Darby Companies, Inc. | Finance and Insurance | $1,169,379 | $1,175,876 | 71 | $36.5M | Research |
| North Mill Equipment Finance LLC | Finance and Insurance | $1,150,500 | $1,039,658 | 74 | $38.0M | Research |
| The First Aintree Limited Partnership | Retail Trade | $1,148,973 | $1,160,463 | 96 | $17.4M | Research |
| Altieri Sebor Wieber LLC | Professional, Scientific, and Technical Services | $1,111,000 | $1,121,866 | 57 | $7.0M | Research |
| Amec Construction, LLC | Construction | $1,097,200 | $1,109,848 | 33 | $37.6M | Research |
| Amec Construction LLC | Construction | $1,097,200 | $1,113,414 | 37 | $11.5M | Research |
| Norwalk Community Health Center, Inc. | Health Care and Social Assistance | $1,091,000 | $1,102,538 | 79 | N/A | Research |
| Connecticut Skinhealth, LLP | Other Services (except Public Administration) | $1,086,046 | $1,098,275 | 25 | <$5M | Research |
| Connecticut Skinhealth LLP | Health Care and Social Assistance | $1,086,045 | $1,092,323 | 68 | $21.3M | Research |
| The Maritime Aquarium at Norwalk INC | Arts, Entertainment, and Recreation | $1,068,500 | $1,077,633 | 64 | $9.7M | Research |
| The First Aintree Limited Partnership | Retail Trade | $1,068,305 | $1,080,423 | 96 | $19.8M | Research |
| Direct Wines, Inc. | Wholesale Trade | $1,043,725 | $1,052,365 | 67 | $17.2M | Research |
| Altieri Sebor Wieber LLC | Professional, Scientific, and Technical Services | $1,033,461 | $1,037,510 | 58 | $7.2M | Research |
| Liberation Programs INC | Health Care and Social Assistance | $1,030,600 | $1,037,122 | 97 | N/A | Research |
| Stepping Stones Museum for Children | Educational Services | $1,027,584 | $1,033,496 | 70 | N/A | Research |
| Stepping Stones Museum for Children, Inc. | Arts, Entertainment, and Recreation | $1,027,500 | $1,033,355 | 110 | N/A | Research |