| Rentex INC | Real Estate and Rental and Leasing | $4,194,817 | $4,242,609 | 370 | $167.2M |  Research |
| Advanced Dental Management, LLC | Health Care and Social Assistance | $4,148,015 | $4,194,680 | 389 | $90.1M | Research |
| Professional Electrical Contractors of Connecticut, Inc. | Construction | $3,929,509 | $3,979,283 | 253 | $83.2M | Research |
| Northeastern Mechanical, Inc. | Construction | $3,500,800 | $3,441,910 | 100 | $31.6M | Research |
| Florence Electric, LLC | Construction | $3,078,512 | $3,114,779 | 159 | $52.3M | Research |
| Sunrise Erectors Inc. | Construction | $3,000,000 | $1,968,525 | 231 | $39.7M | Research |
| Ene Systems, INC | Manufacturing | $2,900,000 | $3,239,877 | 160 | $41.9M | Research |
| K H Electrical Systems INC | Construction | $2,804,500 | $2,835,926 | 110 | $36.2M | Research |
| C.h. Powel Company | Transportation and Warehousing | $2,523,700 | $2,549,352 | 182 | $70.5M | Research |
| Independent Pipe & Supply Corp. | Retail Trade | $2,247,424 | $1,990,372 | 100 | $20.6M | Research |
| Orchard Cove Inc. | Health Care and Social Assistance | $2,214,578 | $2,240,353 | 238 | N/A | Research |
| Barletta Engineering Corporation | Professional, Scientific, and Technical Services | $2,206,030 | $2,235,810 | 127 | $15.7M | Research |
| Draper Knitting | Manufacturing | $2,110,600 | $355,363 | 35 | $12.4M | Research |
| Gray, Gray, & Gray LLP | Professional, Scientific, and Technical Services | $2,080,300 | $2,104,975 | 114 | $36.3M | Research |
| K & H Electrical Systems INC | Retail Trade | $2,000,000 | $2,016,438 | 58 | $10.5M | Research |
| Rentex INC | Real Estate and Rental and Leasing | $2,000,000 | $2,016,000 | 231 | $104.4M | Research |
| Northeastern Mechanical INC | Construction | $2,000,000 | $2,009,778 | 120 | $38.0M | Research |
| Advanced Dental Management | Health Care and Social Assistance | $2,000,000 | $2,024,111 | 300 | $69.5M | Research |
| O'connor Corporation | Construction | $2,000,000 | $2,017,944 | 177 | $54.9M | Research |
| Sunrise Erectors INC | Construction | $1,950,000 | $1,964,408 | 237 | $40.7M | Research |
| Coastal Marine Construction LLC | Construction | $1,706,555 | $1,725,865 | 55 | $17.0M | Research |
| Harbar, LLC | Manufacturing | $1,652,292 | $1,678,458 | 170 | $60.0M | Research |
| Hellenic Womens Benevolent Association INC | Health Care and Social Assistance | $1,534,793 | $1,551,249 | 129 | N/A | Research |
| Trillium at Farnsworth L | Accommodation and Food Services | $1,473,514 | $1,491,851 | 128 | $22.7M | Research |
| Ver-Tex Construction, INC | Construction | $1,459,300 | $1,392,633 | 61 | $69.5M | Research |