| Alyson DeMoss | ABATE of Iowa | Undecided | GA90 |
| Jon Murphy | Casey's General Stores | Undecided | GA90 |
| Tom Cope | Casey's General Stores | Undecided | GA90 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA90 |
| David Peck | FUELIowa (PMCI) | Undecided | GA90 |
| Marc Beltrame | FUELIowa (PMCI) | Undecided | GA90 |
| Brad Epperly | Iowa Automobile Dealers Association | Undecided | GA90 |
| Casey Nickel | Iowa Automobile Dealers Association | Undecided | GA90 |
| Dustin Miller | Iowa Automobile Dealers Association | Undecided | GA90 |
| David Adelman | Iowa Biotechnology Association | Supporting | GA90 |
| Frank Chiodo | Iowa Biotechnology Association | Supporting | GA90 |
| Matt Hinch | Iowa Biotechnology Association | Supporting | GA90 |
| Paige Thorson | Iowa Biotechnology Association | Supporting | GA90 |
| Sara Allen | Iowa Biotechnology Association | Supporting | GA90 |
| Jeff Smith | Iowa Corn Growers Association | Undecided | GA90 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Undecided | GA90 |
| Matt Fitzgerald | Iowa Corn Growers Association | Undecided | GA90 |
| Mindy Poldberg | Iowa Corn Growers Association | Undecided | GA90 |
| Haley Hook | Iowa Department of Agriculture & Land Stewardship | Undecided | GA90 |
| Sara Throener | Iowa Department of Inspections, Appeals, and Licensing | Undecided | GA90 |
| Bobby Martens | Iowa Institute for Cooperatives | Undecided | GA90 |
| Rebecca Boyer | Iowa Institute for Cooperatives | Undecided | GA90 |
| Alyson DeMoss | Iowa Motorcycle Dealers Association | Undecided | GA90 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Supporting | GA90 |
| Nathan Hohnstein | Iowa Renewable Fuels Association (IRF) | Supporting | GA90 |
| Jake Ketzner | KWIK Trip, Inc. | Supporting | GA90 |
| Larry Blixt | KWIK Trip, Inc. | Supporting | GA90 |
| Andy Conlin | POET, LLC | Supporting | GA90 |
| Dennis Tibben | POET, LLC | Supporting | GA90 |
| Mike Heller | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA90 |
| Bob Rafferty | Truckstops of Iowa | Supporting | GA90 |
| Nick Laning | Truckstops of Iowa | Supporting | GA90 |
| Threase Harms | Truckstops of Iowa | Supporting | GA90 |