| Taylor Sklenar | Climate Land Leaders | Opposing | GA91 |
| Jefferson Fink | Conservation Districts of Iowa | Undecided | GA91 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA91 |
| Catherine Pollard | Des Moines Water Works | Undecided | GA91 |
| Nick Laning | Des Moines Water Works | Undecided | GA91 |
| Threase Harms | Des Moines Water Works | Undecided | GA91 |
| Arthur Roche | Dubuque Area Land and Water Legacy | Opposing | GA91 |
| David Peck | Ducks Unlimited, Inc. | Undecided | GA91 |
| Marc Beltrame | Ducks Unlimited, Inc. | Undecided | GA91 |
| Josh Mandelbaum | Environmental Law and Policy Center | Opposing | GA91 |
| Matt Ohloff | Environmental Law and Policy Center | Opposing | GA91 |
| Jeanie Smith | Episcopal Diocese of Iowa | Opposing | GA91 |
| Paul Gennett | Episcopal Diocese of Iowa | Opposing | GA91 |
| Wendy Abrahamson | Episcopal Diocese of Iowa | Opposing | GA91 |
| Jennifer Breon | Food & Water Watch | Opposing | GA91 |
| Preston Moore | Humane World for Animals | Undecided | GA91 |
| Jake Swanson | Iowa Cattlemen's Association | Undecided | GA91 |
| Kelli Wicks | Iowa Cattlemen's Association | Undecided | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Opposing | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Opposing | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA91 |
| Matthew Covington | Iowa Citizens for Community Improvement Action Fund | Opposing | GA91 |
| Jefferson Fink | Iowa Conservation Alliance | Undecided | GA91 |
| Jim Obradovich | Iowa Conservation Alliance | Undecided | GA91 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA91 |
| Catherine Pollard | Iowa Environmental Council | Opposing | GA91 |
| Cody Smith | Iowa Environmental Council | Opposing | GA91 |
| Colleen Fowle | Iowa Environmental Council | Opposing | GA91 |
| Jordan Oster | Iowa Environmental Council | Opposing | GA91 |
| Kerri Johannsen | Iowa Environmental Council | Opposing | GA91 |
| Michael Schmidt | Iowa Environmental Council | Opposing | GA91 |
| Sarah Green | Iowa Environmental Council | Opposing | GA91 |
| Threase Harms | Iowa Environmental Council | Opposing | GA91 |
| Catherine Pollard | Iowa Farmers Union | Undecided | GA91 |
| Threase Harms | Iowa Farmers Union | Undecided | GA91 |
| Teresa Bomhoff | Iowa Integrated Health Planning and Advisory Council | Opposing | GA91 |
| Harrison Furlow | Iowa Pork Producers Association | Undecided | GA91 |
| Jeff Smith | Iowa Pork Producers Association | Undecided | GA91 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Undecided | GA91 |
| Matt Fitzgerald | Iowa Pork Producers Association | Undecided | GA91 |
| David Scott | Iowa Water Well Association | Undecided | GA91 |
| Dane Schumann | Izaak Walton League - Iowa Division | Undecided | 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 |