| Business | Phone |
| Alta Research 39 Brown Rd, Harvard 1451 | (978) 456-3300 |
| Anne Butterfield Co 13 Old Littleton Rd, Harvard 1451 | (978) 456-3933 |
| Sunset Management Svc 88 Shaker Rd, Harvard 1451 | (978) 772-7728 |
| Swift Murdock 16 Old Schoolhouse Rd, Harvard 1451 | (978) 456-9738 |
| Rcr Assoc 147 W Bare Hill Rd, Harvard 1451 | (978) 456-7377 |