| Business | Phone |
| Trax Development Co 21 Jason Ct, St Charles 63304 | (636) 300-4500 |
| Nel-Co Development Inc 603 Dunmore Place Rd, St Charles 63304 | (636) 300-4222 |
| New Town At St Charles 3100 New Town Blvd, St Charles 63301 | (636) 949-2700 |
| Missouri Research Park 14 Research Park Dr # 200, St Charles 63304 | (636) 441-7701 |