| Overhead Door Company of Norwich, Incorporated | Construction | $388,000 | $374,648 | 34 | $10.8M |  Research |
| Julia Tate Properties LLC | Accommodation and Food Services | $246,065 | $247,939 | 26 | $8.1M | Research |
| Julia Tate Properties LLC | Professional, Scientific, and Technical Services | $178,973 | $179,895 | 46 | $9.5M | Research |
| Suchocki & Son, Inc. | Construction | $157,100 | $158,239 | 13 | <$5M | Research |
| Suchocki & Son INC | Construction | $157,100 | $158,523 | 13 | <$5M | Research |
| Piela Electric, Inc. | Other Services (except Public Administration) | $154,583 | $155,930 | 11 | <$5M | Research |
| Vandzant LLC | Construction | $144,655 | $145,872 | 6 | <$5M | Research |
| J & P Construction Corporation | Construction | $129,344 | $130,613 | 10 | <$5M | Research |
| Fleming's Feed & Hardware LLC | Wholesale Trade | $128,200 | $129,134 | 19 | <$5M | Research |
| Strawberry Park Resort Campground INC | Management of Companies and Enterprises | $113,343 | $113,777 | 55 | $9.0M | Research |
| Strawberry Park Campground Inc. | Accommodation and Food Services | $113,300 | $113,961 | 55 | $17.2M | Research |
| J & E Farms, Inc. | Retail Trade | $98,768 | $99,531 | 10 | <$5M | Research |
| National Flood Protection, LLC | Construction | $88,030 | $89,137 | 5 | <$5M | Research |
| National Flood Protection LLC | Manufacturing | $88,030 | $89,086 | 5 | <$5M | Research |
| National Flood Barrier, LLC | Construction | $77,785 | $78,763 | 3 | <$5M | Research |
| National Flood Barrier LLC | Manufacturing | $77,785 | $78,714 | 4 | <$5M | Research |
| William Coon & Son, Inc. | Construction | $72,200 | $72,928 | 4 | <$5M | Research |
| Barry Associates INC | Construction | $68,822 | $69,188 | 4 | <$5M | Research |
| Barry Associates INC | Construction | $68,821 | $69,385 | 4 | <$5M | Research |
| Strawberry Park Management LLC | Real Estate and Rental and Leasing | $63,669 | $64,248 | 35 | <$5M | Research |
| Strawberry Park Management LLC | Accommodation and Food Services | $63,600 | $64,236 | 35 | $10.9M | Research |
| Play'n Learn Child Development Center, LLC | Educational Services | $59,600 | $59,954 | 16 | <$5M | Research |
| Hytek Plumbing and Heating LLC | Construction | $54,177 | $54,423 | 4 | <$5M | Research |
| Furlong Inc. | Accommodation and Food Services | $53,500 | $53,994 | 20 | <$5M | Research |
| Norwich Taxi LLC | Transportation and Warehousing | $52,200 | $0 | 5 | <$5M | Research |