| Brad Epperly | BNSF Railway Co. | Undecided | GA89 |
| Dustin Miller | BNSF Railway Co. | Undecided | GA89 |
| Jim Obradovich | Burlington Junction Railway | Undecided | GA89 |
| Robert Mulqueen | Burlington Junction Railway | Undecided | GA89 |
| Kate Walton | CN Rail | Undecided | GA89 |
| Matt Eide | CN Rail | Undecided | GA89 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA89 |
| Nick Laning | Des Moines Water Works | Undecided | GA89 |
| Threase Harms | Des Moines Water Works | Undecided | GA89 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA89 |
| Colin Tadlock | Iowa Department of Agriculture & Land Stewardship | Undecided | GA89 |
| Doug Struyk | Iowa Drainage District Association | Supporting | GA89 |
| Jennifer Dorman | Iowa Drainage District Association | Supporting | GA89 |
| Jim Carney | Iowa Drainage District Association | Supporting | GA89 |
| John Torbert | Iowa Drainage District Association | Supporting | GA89 |
| Mona Bond | Iowa Drainage District Association | Supporting | GA89 |
| Angela Davis | Iowa Environmental Council | Undecided | GA89 |
| Hannah McDowell | Iowa Farmers Union | Undecided | GA89 |
| Nick Laning | Iowa Farmers Union | Undecided | GA89 |
| Threase Harms | Iowa Farmers Union | Undecided | GA89 |
| Jim Obradovich | Iowa Interstate Railroad | Undecided | GA89 |
| Robert Mulqueen | Iowa Interstate Railroad | Undecided | GA89 |
| Brad Epperly | Iowa Newspaper Association | Undecided | GA89 |
| Dustin Miller | Iowa Newspaper Association | Undecided | GA89 |
| Brett Toresdahl | Iowa Public Information Board | Undecided | GA89 |
| Margaret Johnson | Iowa Public Information Board | Undecided | GA89 |
| Zach Goodrich | Iowa Public Information Board | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Supporting | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA89 |
| William Peterson | Iowa State Association of Counties | Supporting | GA89 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA89 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Supporting | GA89 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA89 |
| William Peterson | Iowa State Association of County Supervisors | Supporting | GA89 |
| Dane Schumann | Jensen Farms | Undecided | GA89 |
| Jim Obradovich | Progressive Rail Iowa (Iowa Traction RR and Iowa Southern RR) | Undecided | GA89 |
| Robert Mulqueen | Progressive Rail Iowa (Iowa Traction RR and Iowa Southern RR) | Undecided | GA89 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA89 |