| Sweeney Drywall Finishes Corp. | Construction | $10,000,000 | $10,116,389 | 152 | $38.4M |  Research |
| Idss Holdings, Inc. | Professional, Scientific, and Technical Services | $972,477 | $979,937 | 43 | $8.9M | Research |
| Idss Holdings Inc. | Manufacturing | $945,770 | $950,175 | 43 | $11.3M | Research |
| Papalia Plumbing and Heating, Inc. | Construction | $548,400 | $553,412 | 40 | $12.7M | Research |
| Photo Diagnostic Systems INC | Manufacturing | $517,617 | $521,985 | 34 | $9.5M | Research |
| Astro Welding & Fabricating, Inc. | Construction | $515,600 | $518,493 | 25 | $8.0M | Research |
| Lawn Barber INC | Manufacturing | $512,500 | $515,532 | 35 | $34.7M | Research |
| Boxborough Regency LLC | Accommodation and Food Services | $444,595 | $454,693 | 101 | $31.6M | Research |
| Comm-Tract Corp | Construction | $404,000 | $407,513 | 18 | $5.9M | Research |
| Alternative Energy Store, Inc. | Wholesale Trade | $360,790 | $363,897 | 31 | $9.5M | Research |
| Alpha Engineering Inc. | Other Services (except Public Administration) | $293,661 | $295,251 | 20 | <$5M | Research |
| Alpha Engineering Inc. | Other Services (except Public Administration) | $278,300 | $281,369 | 21 | <$5M | Research |
| Sterling Construction, Inc. | Construction | $275,000 | $278,567 | 13 | $14.8M | Research |
| Sterling Construction Inc. | Construction | $272,850 | $274,040 | 14 | $16.0M | Research |
| Argento Electric LLC | Construction | $264,637 | $267,717 | 20 | $6.6M | Research |
| Bella Consulting LLC | Finance and Insurance | $231,300 | $232,534 | 12 | $6.2M | Research |
| Veterinary Dental Services, LLC | Professional, Scientific, and Technical Services | $220,780 | $222,706 | 21 | <$5M | Research |
| Assabet Machine Corporation | Manufacturing | $175,467 | $176,983 | 12 | <$5M | Research |
| Perfection Landscaping & Construction, Inc. | Administrative and Support and Waste Management | $171,000 | $172,003 | 20 | <$5M | Research |
| Antaeus Wealth Advisors, LLC | Finance and Insurance | $166,300 | $114,844 | 10 | $5.1M | Research |
| Assabetmachine Corporation | Manufacturing | $158,250 | $159,160 | 9 | <$5M | Research |
| Oxbow Associates Inc. | Professional, Scientific, and Technical Services | $157,040 | $158,023 | 8 | <$5M | Research |
| Senscio Systems, Inc. | Professional, Scientific, and Technical Services | $155,000 | $157,106 | 22 | <$5M | Research |
| High Quality Landscape Construction | Administrative and Support and Waste Management | $154,883 | $155,507 | 15 | <$5M | Research |
| Agmo Dental Group PC | Health Care and Social Assistance | $152,142 | $153,828 | 15 | <$5M | Research |