| Becca Eastwood | American Civil Liberties Union of Iowa (ACLU-IA) | Supporting | GA91 |
| Mark Stringer | American Civil Liberties Union of Iowa (ACLU-IA) | Supporting | GA91 |
| Pete McRoberts | American Civil Liberties Union of Iowa (ACLU-IA) | Supporting | GA91 |
| Dustin Rush | Americans For Prosperity | Supporting | GA91 |
| Tyler Raygor | Americans For Prosperity | Supporting | GA91 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA91 |
| Taylor Sklenar | Climate Land Leaders | Supporting | GA91 |
| Kent Hartwig | Gevo | Opposing | GA91 |
| James Piazza III | Heavy Highway Contractors Association | Supporting | GA91 |
| James Piazza III | Heavy Highway Contractors Association | Opposing | GA91 |
| Jason Copple | International Union of Operating Engineers-Local 234 | Supporting | GA91 |
| Jason Copple | International Union of Operating Engineers-Local 234 | Opposing | GA91 |
| Emily Piper | Iowa Biotechnology Association | Opposing | GA91 |
| Jessica Hyland | Iowa Biotechnology Association | Opposing | GA91 |
| Logan Shine | Iowa Biotechnology Association | Opposing | GA91 |
| Jake Swanson | Iowa Cattlemen's Association | Undecided | GA91 |
| Kelli Wicks | Iowa Cattlemen's Association | Undecided | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Undecided | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Undecided | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA91 |
| Matthew Covington | Iowa Citizens for Community Improvement Action Fund | Supporting | GA91 |
| Ian Latham | Iowa Corn Growers Association | Opposing | GA91 |
| Jeff Smith | Iowa Corn Growers Association | Opposing | GA91 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Opposing | GA91 |
| Matt Fitzgerald | Iowa Corn Growers Association | Opposing | GA91 |
| Nathan Hohnstein | Iowa Corn Growers Association | Opposing | GA91 |
| Catherine Pollard | Iowa Emergency Management Association | Undecided | GA91 |
| Nick Laning | Iowa Emergency Management Association | Undecided | GA91 |
| Threase Harms | Iowa Emergency Management Association | Undecided | GA91 |
| Catherine Pollard | Iowa Environmental Council | Undecided | GA91 |
| Threase Harms | Iowa Environmental Council | Undecided | GA91 |
| Catherine Pollard | Iowa Farmers Union | Supporting | GA91 |
| Threase Harms | Iowa Farmers Union | Supporting | GA91 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Supporting | GA91 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA91 |
| Megan Carlson | Iowa Institute for Cooperatives | Undecided | GA91 |
| Frederick Haskins | Iowa Insurance Associates | Opposing | GA91 |
| Colin Gorton | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| David Adelman | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Frank Chiodo | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Matt Hinch | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Paige Thorson | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Sara Allen | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Supporting | GA91 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA91 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA91 |
| Andrea Woodard | Iowa State Association of County Supervisors | Supporting | GA91 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA91 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA91 |
| Jon Murphy | Iowa State Building and Construction Trades | Opposing | GA91 |
| Tom Cope | Iowa State Building and Construction Trades | Opposing | GA91 |
| Kurtis Bower | Kurtis Bower | Supporting | GA91 |
| Dylan Gramlich | Laborers International Union of North America | Supporting | GA91 |
| Dylan Gramlich | Laborers International Union of North America | Opposing | GA91 |
| Doyle Turner | Land of the Free Action | Supporting | GA91 |
| Jefferson Fink | Land of the Free Action | Supporting | GA91 |
| Victoria Sinclair | Land of the Free Action | Supporting | GA91 |
| Sue Tronchetti | Landus Cooperative | Supporting | GA91 |
| Dane Schumann | Mid-American Carpenters Regional Council | Opposing | GA91 |
| Felicia Hilton | Mid-American Carpenters Regional Council | Opposing | GA91 |
| Andy Conlin | POET, LLC | Opposing | GA91 |
| Clair Lewis | POET, LLC | Opposing | GA91 |
| Dennis Tibben | POET, LLC | Opposing | GA91 |
| Kate Walton | POET, LLC | Opposing | GA91 |
| Matt Eide | POET, LLC | Opposing | GA91 |
| Zayden Reffitt | Siouxland Bitches Get Stuff Done | Supporting | GA91 |
| Dave McDermott | Sisters of the Presentation, Dubuque | Opposing | GA91 |
| BRITTANY LUMLEY | Summit Carbon Solutions | Opposing | GA91 |
| Courtney Craig | Summit Carbon Solutions | Opposing | GA91 |
| David Adelman | Summit Carbon Solutions | Opposing | GA91 |
| Elliott Meyer | Summit Carbon Solutions | Opposing | GA91 |
| Jake Ketzner | Summit Carbon Solutions | Opposing | GA91 |
| Jeffrey Boeyink | Summit Carbon Solutions | Opposing | 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 |
| Gary Grant | Urban County Coalition | Undecided | GA91 |
| Larry Murphy | Urban County Coalition | Undecided | GA91 |
| John Strathman | VALOR Iowa | Supporting | GA91 |