| Business | Phone |
| Data & Management Counsel Inc 428 Exton Cmns, Exton 19341 | (610) 524-7900 |
| Principia Partners 1230 N Pottstown Pike, Exton 19341 | (610) 458-3738 |
| Industrial Research Assoc 74 N Pottstown Pike, Exton 19341 | (610) 321-9770 |
| J Reckner Assoc 486 Thomas Jones Way # 280, Exton 19341 | (610) 594-8535 |