| Rachel Geilenfeld | ADM | Opposing | GA91 |
| Rachel Geilenfeld | ADM | Withdrawn | GA91 |
| Rachel Geilenfeld | ADM | Undecided | GA91 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA91 |
| Jacob Schrader | Central Iowa Water Works | Undecided | GA91 |
| Logan Murray | Central Iowa Water Works | Undecided | GA91 |
| Sydney Gangestad | Central Iowa Water Works | Undecided | GA91 |
| Jefferson Fink | Conservation Districts of Iowa | Undecided | GA91 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA91 |
| Bryan Widenhouse | FAMM | Withdrawn | GA91 |
| Bryan Widenhouse | FAMM | Opposing | GA91 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA91 |
| John Davis | Iowa Association of Business and Industry (ABI) | Undecided | GA91 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Jefferson Fink | Iowa Conservation Alliance | Undecided | GA91 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA91 |
| Jon Murphy | Iowa Distillers Alliance | Undecided | GA91 |
| Tom Cope | Iowa Distillers Alliance | Undecided | GA91 |
| Colin Gorton | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Colin Gorton | Iowa Renewable Fuels Association (IRF) | Undecided | GA91 |
| Sara Allen | Iowa Renewable Fuels Association (IRF) | Undecided | GA91 |
| Emily Piper | Iowa Rural Water Association | Undecided | GA91 |
| Logan Shine | Iowa Rural Water Association | Undecided | GA91 |
| Clair Lewis | Iowa Section American Water Works Association | Undecided | GA91 |
| Kate Walton | Iowa Section American Water Works Association | Undecided | GA91 |
| Matt Eide | Iowa Section American Water Works Association | Undecided | GA91 |
| Jefferson Fink | Iowa Society of Solid Waste Operations (ISOSWO) | Undecided | GA91 |
| Jim Obradovich | Iowa Society of Solid Waste Operations (ISOSWO) | Undecided | GA91 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA91 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA91 |
| Jim Carney | Iowa State Bar Association | Undecided | GA91 |
| Jeff Smith | Templeton Rye Spirits, LLC | Supporting | GA91 |
| Maggie Smith-Fitzgerald | Templeton Rye Spirits, LLC | Supporting | GA91 |
| Matt Fitzgerald | Templeton Rye Spirits, LLC | Supporting | GA91 |
| Doug Struyk | The Nature Conservancy | Undecided | GA91 |
| Emily Kavanagh | The Nature Conservancy | Undecided | GA91 |
| Jennifer Dorman | The Nature Conservancy | Undecided | GA91 |
| Jim Carney | The Nature Conservancy | Undecided | GA91 |
| Craig Schoenfeld | Valero Energy Corporation | Undecided | GA91 |
| Nick Boeyink | Valero Energy Corporation | Undecided | GA91 |
| Clair Lewis | West Des Moines Water Works | Undecided | GA91 |
| Kate Walton | West Des Moines Water Works | Undecided | GA91 |
| Matt Eide | West Des Moines Water Works | Undecided | GA91 |