| Restaurant Design & Equipment Corporatio | Retail Trade | $95,822 | $96,323 | 5 | <$5M |  Research |
| Restaurant Design & Equipment Corporatio | Retail Trade | $95,820 | $96,311 | 5 | <$5M | Research |
| Point One Architects & Planner | Professional, Scientific, and Technical Services | $94,900 | $95,589 | 7 | <$5M | Research |
| The Wilkes Group INC | Wholesale Trade | $94,887 | $95,428 | 5 | <$5M | Research |
| Rjs Barber Associates LLC | Unknown | $93,828 | $0 | 7 | N/A | Research |
| Diebolt & Company INC | Wholesale Trade | $92,720 | $93,551 | 11 | <$5M | Research |
| Diebolt & Company INC | Wholesale Trade | $92,720 | $93,292 | 7 | <$5M | Research |
| The Wilkes Group INC | Wholesale Trade | $92,450 | $93,207 | 7 | <$5M | Research |
| Advanced Family Dentistry of Old Lyme LLC | Health Care and Social Assistance | $92,180 | $92,922 | 7 | <$5M | Research |
| Advanced Family Dentistry of Old Lyme Ll | Other Services (except Public Administration) | $92,177 | $93,127 | 7 | <$5M | Research |
| Old Lyme Phoebe Griffin Noyes Library Association, Inc. | Information | $91,300 | $92,180 | 12 | N/A | Research |
| Joseph Jankovich | Administrative and Support and Waste Management | $86,800 | $87,839 | 9 | <$5M | Research |
| High End Landscape Design LLC | Administrative and Support and Waste Management | $86,800 | $87,865 | 9 | <$5M | Research |
| Wilcox Tree Experts, LLC | Administrative and Support and Waste Management | $86,608 | $87,308 | 9 | <$5M | Research |
| Speirs Plumbing Inc. | Construction | $85,170 | $86,185 | 13 | <$5M | Research |
| Old Lyme Marina | Arts, Entertainment, and Recreation | $82,895 | $83,597 | 8 | <$5M | Research |
| Zelek Electric | Construction | $77,366 | $77,928 | 6 | <$5M | Research |
| Cummins Envirotech INC | Professional, Scientific, and Technical Services | $76,582 | $76,966 | 7 | <$5M | Research |
| Brickyard Restaurant LLC | Accommodation and Food Services | $74,997 | $75,881 | 30 | $5.3M | Research |
| Old Lyme Children's Learning Center, INC | Health Care and Social Assistance | $74,564 | $75,070 | 39 | N/A | Research |
| Cds LLC | Professional, Scientific, and Technical Services | $72,915 | $73,548 | 3 | <$5M | Research |
| East Construction LLC | Construction | $72,200 | $72,513 | 4 | <$5M | Research |
| Anton Paving & Construction LLC | Construction | $70,000 | $70,793 | 6 | <$5M | Research |
| The Bowerbird | Retail Trade | $68,200 | $69,063 | 12 | <$5M | Research |
| The Bowerbird | Retail Trade | $68,200 | $69,129 | 10 | <$5M | Research |