| Earth INC | Wholesale Trade | $1,278,615 | $1,284,080 | 57 | $14.7M |  Research |
| Chapel Hill-Chauncy Hall School | Educational Services | $1,261,000 | $1,269,302 | 69 | N/A | Research |
| Chapel Hill-Chauncy Hall School | Educational Services | $1,261,000 | $1,269,372 | 69 | N/A | Research |
| Takeoff Technologies, Inc. | Retail Trade | $1,230,745 | $1,237,412 | 100 | $23.9M | Research |
| Delphi Construction Inc. | Construction | $1,223,400 | $1,230,265 | 37 | $11.2M | Research |
| Delphi Construction, INC | Construction | $1,223,400 | $1,233,629 | 79 | $90.0M | Research |
| Yottaa INC | Information | $1,202,497 | $1,209,612 | 66 | $11.1M | Research |
| Surgi-Care Sales LLC | Wholesale Trade | $1,194,190 | $1,201,126 | 79 | $24.2M | Research |
| Labyrinth Solutions, Inc. | Professional, Scientific, and Technical Services | $1,182,597 | $1,191,730 | 59 | $12.2M | Research |
| Addaptive Intelligence, Inc. | Professional, Scientific, and Technical Services | $1,170,500 | $1,179,287 | 64 | $7.2M | Research |
| Foothold America Inc. | Professional, Scientific, and Technical Services | $1,163,200 | $791,847 | 66 | $6.8M | Research |
| Anthony Vanaria & Sons, INC | Administrative and Support and Waste Management | $1,162,812 | $1,174,666 | 111 | $24.0M | Research |
| The Chateau Restaurant of Waltham, INC | Accommodation and Food Services | $1,157,400 | $1,170,464 | 151 | $26.8M | Research |
| Boston Engineering Corporation | Professional, Scientific, and Technical Services | $1,132,360 | $1,143,212 | 66 | $8.1M | Research |
| Boathouse Group, Inc. | Professional, Scientific, and Technical Services | $1,129,578 | $1,138,274 | 57 | $6.4M | Research |
| Boathouse Group Inc. | Professional, Scientific, and Technical Services | $1,129,577 | $1,137,592 | 54 | $6.0M | Research |
| Clean Facilities Group, Inc. | Administrative and Support and Waste Management | $1,123,700 | $1,129,395 | 215 | $46.6M | Research |
| Katz, Nannis & Solomon P.c. | Professional, Scientific, and Technical Services | $1,091,202 | $1,101,008 | 73 | $23.2M | Research |
| Winslow King Richards Co. Inc. | Administrative and Support and Waste Management | $1,089,762 | $1,102,272 | 88 | $13.8M | Research |
| Winslow Technology Group, LLC | Professional, Scientific, and Technical Services | $1,070,857 | $957,085 | 56 | $11.6M | Research |
| New England Cleaning Services, Inc. | Administrative and Support and Waste Management | $1,068,400 | $1,078,060 | 237 | $51.3M | Research |
| Waltham Pubs INC | Accommodation and Food Services | $1,051,022 | $1,060,481 | 91 | $16.2M | Research |
| Winslow King Richards Co. Inc. | Professional, Scientific, and Technical Services | $1,045,500 | $1,053,320 | 54 | $5.6M | Research |
| Milestones, Inc. | Educational Services | $1,036,700 | $1,044,101 | 72 | $8.6M | Research |
| Kvc Builders LLC | Construction | $1,034,445 | $1,042,182 | 56 | $17.0M | Research |