| Taylor Sklenar | Climate Land Leaders | Opposing | GA91 |
| Anne Discher | Common Good Iowa | Opposing | GA91 |
| Mike Owen | Common Good Iowa | Opposing | GA91 |
| Sean Finn | Common Good Iowa | Opposing | GA91 |
| Sheila Hansen | Common Good Iowa | Opposing | GA91 |
| Jacob Gould | Congressional Sportsmen's Foundation | Opposing | GA91 |
| Jefferson Fink | Conservation Districts of Iowa | Opposing | GA91 |
| Jim Obradovich | Conservation Districts of Iowa | Opposing | GA91 |
| Victoria Sinclair | Conservation Districts of Iowa | Opposing | GA91 |
| Nick Laning | Des Moines Water Works | Opposing | GA91 |
| Noah Hackbart | Des Moines Water Works | Opposing | GA91 |
| Threase Harms | Des Moines Water Works | Opposing | GA91 |
| Arthur Roche | Dubuque Area Land and Water Legacy | Opposing | GA91 |
| Marty Corfman | Dubuque Audubon Society | Opposing | GA91 |
| David Peck | Ducks Unlimited, Inc. | Opposing | GA91 |
| Marc Beltrame | Ducks Unlimited, Inc. | 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 |
| 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 |
| Amy Campbell | Iowa Association of County Conservation Boards | Opposing | GA91 |
| Chloe Gayer | Iowa Association of County Conservation Boards | Opposing | GA91 |
| Craig Patterson | Iowa Association of County Conservation Boards | Opposing | GA91 |
| Robert Cook | Iowa Atheists and Freethinkers | Opposing | GA91 |
| Nick Laning | Iowa Bicycle Coalition | Opposing | GA91 |
| Noah Hackbart | Iowa Bicycle Coalition | Opposing | GA91 |
| Threase Harms | Iowa Bicycle Coalition | Opposing | GA91 |
| Eric Goranson | Iowa Bowhunters Association | Opposing | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA91 |
| Jeffrey Anderson | Iowa Conference of the United Methodist Church | Opposing | GA91 |
| Jefferson Fink | Iowa Conservation Alliance | Opposing | GA91 |
| Jim Obradovich | Iowa Conservation Alliance | Opposing | GA91 |
| Victoria Sinclair | Iowa Conservation Alliance | Opposing | GA91 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA91 |
| John Torbert | Iowa Drainage District Association | Opposing | GA91 |
| Mona Bond | Iowa Drainage District Association | Opposing | GA91 |
| Cody Smith | Iowa Environmental Council | Opposing | GA91 |
| Colleen Fowle | Iowa Environmental Council | Opposing | GA91 |
| Kerri Johannsen | Iowa Environmental Council | Opposing | GA91 |
| Michael Schmidt | Iowa Environmental Council | Opposing | GA91 |
| Noah Hackbart | Iowa Environmental Council | Opposing | GA91 |
| Sarah Green | Iowa Environmental Council | Opposing | GA91 |
| Threase Harms | Iowa Environmental Council | Opposing | GA91 |
| Irene DeMaris | Iowa Faith & Climate Network | Opposing | GA91 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA91 |
| Matt Gronewald | Iowa Farm Bureau Federation | Supporting | GA91 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA91 |
| Noah Hackbart | Iowa Farmers Union | Opposing | GA91 |
| Threase Harms | Iowa Farmers Union | Opposing | GA91 |
| Amy Campbell | Iowa Natural Heritage Foundation | Opposing | GA91 |
| Anna Gray | Iowa Natural Heritage Foundation | Opposing | GA91 |
| Chloe Gayer | Iowa Natural Heritage Foundation | Opposing | GA91 |
| Craig Patterson | Iowa Natural Heritage Foundation | Opposing | GA91 |
| Jessica Seelinger | Iowa Natural Heritage Foundation | Opposing | GA91 |
| Clara Wulfsen | Iowa Soybean Association | Opposing | GA91 |
| Doug Struyk | Iowa Soybean Association | Opposing | GA91 |
| Jennifer Dorman | Iowa Soybean Association | Opposing | GA91 |
| Jim Carney | Iowa Soybean Association | Opposing | GA91 |
| Katie Hall | Iowa Soybean Association | Opposing | GA91 |
| Matt Herman | Iowa Soybean Association | Opposing | GA91 |
| Megan Decker | Iowa Soybean Association | Opposing | GA91 |
| Phil Jeneary | Iowa Sportsmans Club | Opposing | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Opposing | GA91 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA91 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA91 |
| Nate Ristow | Iowa Taxpayers Association | Undecided | GA91 |
| David Adelman | Iowa Travel Industry Partners | Opposing | GA91 |
| Frank Chiodo | Iowa Travel Industry Partners | Opposing | GA91 |
| Matt Hinch | Iowa Travel Industry Partners | Opposing | GA91 |
| Paige Thorson | Iowa Travel Industry Partners | Opposing | GA91 |
| Sara Allen | Iowa Travel Industry Partners | Opposing | GA91 |
| David Adelman | Iowa Water Land Legacy Coalition | Opposing | GA91 |
| Frank Chiodo | Iowa Water Land Legacy Coalition | Opposing | GA91 |
| Matt Hinch | Iowa Water Land Legacy Coalition | Opposing | GA91 |
| Paige Thorson | Iowa Water Land Legacy Coalition | Opposing | GA91 |
| Sara Allen | Iowa Water Land Legacy Coalition | Opposing | GA91 |
| Scott Newhard | Iowa Water Land Legacy Coalition | Opposing | GA91 |
| Ryan Smith | Iowa Wildlife Federation | Opposing | GA91 |
| Andy Conlin | Iowans for Tax Relief | Undecided | GA91 |
| Chris Hagenow | Iowans for Tax Relief | Undecided | GA91 |
| Jake Highfill | Iowans for Tax Relief | Undecided | GA91 |
| Dane Schumann | Izaak Walton League - Iowa Division | Opposing | GA91 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Undecided | GA91 |
| Tony Thompson | Personal Interest- Tony Thompson | Opposing | GA91 |
| Eric Goranson | Pheasants Forever, Inc. & Quail Forever | Opposing | GA91 |
| Amber Markham | The Nature Conservancy | Opposing | GA91 |
| Clara Wulfsen | The Nature Conservancy | Opposing | GA91 |
| Doug Struyk | The Nature Conservancy | Opposing | GA91 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA91 |
| Jim Carney | The Nature Conservancy | Opposing | GA91 |