| Cross Sound Ferry Services INC | Transportation and Warehousing | $3,338,985 | $3,377,772 | 190 | $48.2M |  Research |
| Mitchell College | Educational Services | $2,528,500 | $2,456,934 | 327 | N/A | Research |
| Mitchell College | Educational Services | $2,000,000 | $1,987,983 | 268 | N/A | Research |
| Cross Sound Ferry Services INC | Transportation and Warehousing | $2,000,000 | $2,021,096 | 175 | $44.4M | Research |
| Child and Family Agency of Southeastern Connecticut, Inc. | Health Care and Social Assistance | $1,958,400 | $1,981,466 | 186 | N/A | Research |
| Child and Family Agency of Southeastern Connecticut Inc. | Health Care and Social Assistance | $1,958,400 | $1,975,754 | 177 | N/A | Research |
| The Day Publishing Co. | Information | $1,820,800 | $1,838,907 | 199 | $33.4M | Research |
| Sheffield Pharmaceuticals LLC | Manufacturing | $1,707,062 | $1,724,322 | 167 | $165.6M | Research |
| Whole Life INC | Health Care and Social Assistance | $1,500,000 | $1,513,583 | 480 | $77.8M | Research |
| Sound Community Services, Inc. | Health Care and Social Assistance | $1,265,680 | $1,286,451 | 145 | N/A | Research |
| Bayard Inc. | Manufacturing | $1,165,936 | $1,183,856 | 78 | $77.4M | Research |
| Secor's Auto Center Inc. | Retail Trade | $1,120,355 | $1,130,145 | 97 | $24.4M | Research |
| Bayard Inc. | Information | $1,090,107 | $1,098,949 | 81 | $13.6M | Research |
| Sully's Auto Sales & Service, Inc. | Retail Trade | $1,032,200 | $1,038,393 | 82 | $20.7M | Research |
| Five Star Supermarkets of New London ,inc. | Retail Trade | $1,015,040 | $0 | 214 | $53.4M | Research |
| Car Service Inc. | Retail Trade | $933,352 | $945,115 | 89 | $22.4M | Research |
| F & F Distributors | Wholesale Trade | $933,280 | $940,107 | 60 | $15.4M | Research |
| Health Care Visions, Inc. | Health Care and Social Assistance | $849,000 | $856,146 | 85 | $14.5M | Research |
| Williams Memorial Institute | Educational Services | $806,100 | $811,356 | 54 | N/A | Research |
| Suisman, Shapiro, Wool, Brennan, Gray & Greenburg PC | Professional, Scientific, and Technical Services | $724,957 | $732,127 | 44 | $10.7M | Research |
| Tobin, Carberry, O'malley, Riley & Selinger, P.c. | Professional, Scientific, and Technical Services | $721,267 | $725,931 | 45 | $10.9M | Research |
| Secor%27s Auto Center Inc. | Retail Trade | $719,355 | $727,149 | 60 | $15.1M | Research |
| Whaling City Auto Group LLC | Retail Trade | $693,500 | $698,421 | 46 | $11.6M | Research |
| Tobin Carberry O'malley Riley & Selinger PC | Professional, Scientific, and Technical Services | $685,053 | $688,976 | 35 | $8.5M | Research |
| Carriage House of New London, INC | Retail Trade | $657,134 | $661,905 | 52 | $13.1M | Research |