| Jeff Smith | Agribusiness Association of Iowa | Supporting | GA89 |
| Maggie Smith-Fitzgerald | Agribusiness Association of Iowa | Supporting | GA89 |
| Matt Fitzgerald | Agribusiness Association of Iowa | Supporting | GA89 |
| Scott Newhard | Associated General Contractors of Iowa | Supporting | GA89 |
| Brad Epperly | BNSF Railway Co. | Opposing | GA89 |
| Dustin Miller | BNSF Railway Co. | Opposing | GA89 |
| Kate Walton | CN Rail | Opposing | GA89 |
| Madeleine Bradley | CN Rail | Opposing | GA89 |
| Matt Eide | CN Rail | Opposing | GA89 |
| Jeff Smith | Iowa Corn Growers Association | Supporting | GA89 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Supporting | GA89 |
| Matt Fitzgerald | Iowa Corn Growers Association | Supporting | GA89 |
| Mindy Poldberg | Iowa Corn Growers Association | Supporting | GA89 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA89 |
| Doug Struyk | Iowa Soybean Association | Supporting | GA89 |
| Jennifer Dorman | Iowa Soybean Association | Supporting | GA89 |
| Jim Carney | Iowa Soybean Association | Supporting | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA89 |
| William Peterson | Iowa State Association of Counties | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA89 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA89 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA89 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |
| Mike Heller | Waste Management, Inc. | Undecided | GA89 |