| The Trustees of Lawrence Academy at Groton | Public Administration | $2,186,500 | $1,889,795 | 157 | N/A |  Research |
| Gibbet Hill Grill LLC | Accommodation and Food Services | $1,454,800 | $1,469,308 | 114 | $20.2M | Research |
| 128 Main Street LLC | Accommodation and Food Services | $1,061,400 | $1,072,928 | 64 | $11.4M | Research |
| Gibbet Hill Grill LLC | Accommodation and Food Services | $1,022,400 | $1,029,642 | 69 | $12.3M | Research |
| 128 Main Street, LLC | Accommodation and Food Services | $745,400 | $755,546 | 114 | $35.6M | Research |
| Platt Builders INC | Construction | $726,200 | $730,239 | 36 | $10.9M | Research |
| Platt Builders INC | Construction | $569,607 | $572,978 | 38 | $11.5M | Research |
| Groton Dental Wellness Center, LLP | Health Care and Social Assistance | $557,800 | $490,709 | 33 | $7.6M | Research |
| Dt Ward PC | Professional, Scientific, and Technical Services | $516,400 | $523,027 | 21 | $5.1M | Research |
| Rivercourt, LP | Real Estate and Rental and Leasing | $499,300 | $503,697 | 102 | $15.3M | Research |
| Insco Corporation | Administrative and Support and Waste Management | $347,200 | $350,228 | 25 | <$5M | Research |
| Station House Restaurant LLC | Accommodation and Food Services | $319,921 | $324,137 | 41 | $7.3M | Research |
| Groton Dental Wellness Center LLP | Health Care and Social Assistance | $316,127 | $320,267 | 33 | $7.6M | Research |
| Groton Medical Association LLC | Health Care and Social Assistance | $310,800 | $313,031 | 20 | <$5M | Research |
| Mill5 LLC | Professional, Scientific, and Technical Services | $266,980 | $271,493 | 10 | <$5M | Research |
| Resin Technology LLC | Wholesale Trade | $259,800 | $259,384 | 17 | <$5M | Research |
| Station House Restaurant, LLC | Accommodation and Food Services | $228,515 | $231,758 | 41 | $7.3M | Research |
| David J. Galvin Flooring, Inc. | Construction | $191,700 | $193,074 | 35 | $8.8M | Research |
| Filho's Cucina Inc. | Accommodation and Food Services | $187,500 | $189,252 | 28 | <$5M | Research |
| David J Galvin Flooring INC | Construction | $185,524 | $187,225 | 14 | <$5M | Research |
| Groton Community School | Health Care and Social Assistance | $180,500 | $182,094 | 21 | N/A | Research |
| Groton Community School Inc. | Educational Services | $164,200 | $165,577 | 20 | N/A | Research |
| The American Baptist Churches of Ma | Other Services (except Public Administration) | $161,084 | $162,386 | 36 | N/A | Research |
| Groton Medical Wellness Spa, LLC | Health Care and Social Assistance | $159,700 | $125,351 | 11 | <$5M | Research |
| Children's Center at Groton, INC | Health Care and Social Assistance | $155,400 | $157,750 | 18 | <$5M | Research |