| Peterborough Retirement Community at Upland Farm INC | Health Care and Social Assistance | $2,031,000 | $2,053,647 | 195 | N/A |  Research |
| Lotlinx Inc. | Professional, Scientific, and Technical Services | $1,826,787 | $1,841,702 | 78 | $8.1M | Research |
| Lotlinx, INC | Professional, Scientific, and Technical Services | $1,826,700 | $1,846,769 | 47 | $9.7M | Research |
| Microspec Corporation | Manufacturing | $1,275,000 | $1,289,627 | 88 | $24.6M | Research |
| Summerhill Ventures LLC | Health Care and Social Assistance | $557,400 | $561,813 | 83 | $14.1M | Research |
| Swan Contracting LLC | Construction | $472,190 | $477,843 | 75 | $24.7M | Research |
| The Macdowell Colony, Incorporated | Arts, Entertainment, and Recreation | $433,800 | $438,269 | 34 | N/A | Research |
| Scott-Farrar Home | Health Care and Social Assistance | $347,300 | $351,201 | 63 | N/A | Research |
| Raynor Dental Peterborough Pllc | Health Care and Social Assistance | $330,700 | $334,614 | 22 | $5.1M | Research |
| Peterborough Family Dental and Implant Center | Health Care and Social Assistance | $312,500 | $315,334 | 19 | <$5M | Research |
| Tcd Construction, Inc. | Construction | $280,600 | $282,983 | 15 | $17.1M | Research |
| Tcd Construction INC | Construction | $272,645 | $274,244 | 16 | $18.2M | Research |
| Testvonics, Inc. | Transportation and Warehousing | $257,810 | $260,725 | 13 | <$5M | Research |
| Airtank, Inc. | Professional, Scientific, and Technical Services | $255,787 | $257,421 | 18 | <$5M | Research |
| Jasper Ainslie | Health Care and Social Assistance | $249,720 | $251,841 | 19 | <$5M | Research |
| Dahle North America, INC | Wholesale Trade | $242,500 | $243,703 | 22 | $5.7M | Research |
| Achille Enterprises, INC | Retail Trade | $213,100 | $214,799 | 58 | $12.0M | Research |
| Rt Consulting of the Northeast, LLC | Professional, Scientific, and Technical Services | $206,900 | $288,711 | 19 | <$5M | Research |
| Waterhouse LLC | Accommodation and Food Services | $202,414 | $204,298 | 42 | $7.5M | Research |
| Pinnacle Rock Mechanical Services LLC | Construction | $195,994 | $197,143 | 12 | <$5M | Research |
| Pinnacle Rock Mechanical Services LLC | Construction | $195,900 | $197,108 | 14 | <$5M | Research |
| The Well, Inc. | Educational Services | $189,500 | $190,907 | 41 | N/A | Research |
| Raynor Dental Peterborough Pllc | Health Care and Social Assistance | $184,127 | $185,282 | 23 | $5.3M | Research |
| Wikimotive LLC | Professional, Scientific, and Technical Services | $176,200 | $177,957 | 14 | <$5M | Research |
| The Monadnock Workshop | Health Care and Social Assistance | $161,400 | $163,045 | 29 | N/A | Research |