| Odd Fellows Home of Connecticut, Inc. | Health Care and Social Assistance | $1,956,572 | $1,975,119 | 247 | N/A |  Research |
| Jobtarget LLC | Information | $1,369,017 | $1,377,269 | 88 | $14.8M | Research |
| Jobtarget, LLC | Information | $1,174,290 | $1,180,683 | 70 | $11.8M | Research |
| Girard Motors Inc. | Retail Trade | $1,126,413 | $1,140,578 | 99 | $24.9M | Research |
| Girard Motors, INC | Retail Trade | $1,126,413 | $1,140,609 | 105 | $26.5M | Research |
| Trans-Oceanic Motors, Ltd. | Retail Trade | $837,189 | $845,010 | 57 | $14.4M | Research |
| Trans-Oceanic Motors Ltd. | Retail Trade | $837,189 | $841,157 | 57 | $14.4M | Research |
| Spicer Plus, Inc. | Retail Trade | $722,400 | $726,438 | 48 | $11.5M | Research |
| Thayermahan Inc. | Manufacturing | $716,283 | $718,756 | 42 | $11.0M | Research |
| Mcdonalds (hamilton Sunset Corporation) | Accommodation and Food Services | $549,300 | $553,980 | 150 | $26.6M | Research |
| Noank Community Support Services, Inc. | Health Care and Social Assistance | $474,790 | $479,694 | 91 | N/A | Research |
| Survival Systems USA Inc. | Educational Services | $473,400 | $476,967 | 29 | $6.1M | Research |
| Survival Systems Usa, Inc. | Educational Services | $473,400 | $477,330 | 29 | $6.1M | Research |
| Thayermahan INC | Manufacturing | $449,107 | $452,860 | 31 | $8.1M | Research |
| Columbia Air Services, Inc. | Transportation and Warehousing | $416,000 | $375,286 | 28 | <$5M | Research |
| Analytical Technologies Group LLC | Other Services (except Public Administration) | $371,300 | $333,962 | 23 | <$5M | Research |
| Bowe Enterprises, LLC | Retail Trade | $366,540 | $368,773 | 79 | $12.1M | Research |
| Hoyt, Filippetti & Malaghan, LLC | Professional, Scientific, and Technical Services | $354,023 | $357,572 | 20 | $6.4M | Research |
| Embry, Neusner, Arscott, & Shafner, LLC | Professional, Scientific, and Technical Services | $326,125 | $328,269 | 24 | $5.8M | Research |
| Fine Food Services INC | Accommodation and Food Services | $318,349 | $321,794 | 20 | <$5M | Research |
| Psm Hotels LLC | Accommodation and Food Services | $308,460 | $310,054 | 40 | $12.5M | Research |
| Noank Shipyard Inc. | Arts, Entertainment, and Recreation | $297,000 | $300,263 | 20 | <$5M | Research |
| Mystic Air Quality Consultants, Inc. | Professional, Scientific, and Technical Services | $287,915 | $289,543 | 16 | <$5M | Research |
| Groton Hospitality LLC | Accommodation and Food Services | $286,615 | $288,701 | 16 | $5.0M | Research |
| Embry, Neusner, Arscott, & Shafner, LLC | Professional, Scientific, and Technical Services | $283,165 | $284,880 | 24 | $5.8M | Research |