| 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 |
| Brad Epperly | BNSF Railway Co. | Opposing | GA89 |
| Dustin Miller | BNSF Railway Co. | Opposing | GA89 |
| Kate Walton | CN Rail | Opposing | GA89 |
| Kate Walton | CN Rail | Undecided | GA89 |
| Madeleine Bradley | CN Rail | Opposing | GA89 |
| Madeleine Bradley | CN Rail | Undecided | GA89 |
| Matt Eide | CN Rail | Opposing | GA89 |
| Matt Eide | CN Rail | Undecided | GA89 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Undecided | 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 |
| Jill Altringer | Iowa Poultry Association | Undecided | GA89 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Undecided | 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 |
| Jill Altringer | Iowa State Dairy Association | Undecided | GA89 |
| Jill Altringer | Iowa Turkey Federation | 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 |
| Michael Triplett | Union Pacific Railroad | Opposing | 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 |