| Business | Phone |
| Martin Technical Research 5701 N Waterbury Rd, Des Moines 50312 | (515) 279-7211 |
| High Tech Ind Market Research 3821 71st St # P, Des Moines 50322 | (515) 279-7211 |
| Hill Simonton Bell 3930 10th St, Des Moines 50313 | (515) 244-8228 |
| Hti Market Research Inc 5127 Shriver Ave, Des Moines 50312 | (515) 279-7211 |
| Pirro Co 5835 Grand Ave, Des Moines 50312 | (515) 255-3244 |
| Selzer & Co 520 42nd St, Des Moines 50312 | (515) 271-5700 |
| Lighthouse Research Solutions 4323 Sheridan Ave, Des Moines 50310 | (515) 255-3455 |
| T L Grantham & Assoc 100 E Euclid Ave 17, Des Moines 50313 | (515) 288-7156 |