| Business | Phone |
| Clinical Trials Inc 2 Lile Ct # 100, Little Rock 72205 | (501) 227-6179 |
| Summit Research Group Llc 1014 Autumn Rd, Little Rock 72211 | (501) 221-9233 |
| Research Solutions 900 S Shackleford Rd # 210, Little Rock 72211 | (501) 221-5000 |
| Physicians Group Research Clnc 500 S University Ave # 515, Little Rock 72205 | (501) 978-7877 |
| Arp Arkansas Research Prgrm 1 Lile Ct, Little Rock 72205 | (501) 227-6179 |