| Paige Yontz | AARP Iowa | Supporting | GA91 |
| Christopher Rants | American Flood Coalition Action | Supporting | GA91 |
| Katie Rock | BlueGreen Alliance | Supporting | GA91 |
| Christopher Rants | Center for Rural Affairs | Supporting | GA91 |
| Cynthia Farmer | Center for Rural Affairs | Supporting | GA91 |
| Jake Friedrichsen | Center for Rural Affairs | Supporting | GA91 |
| Arthur Roche | Dubuque Area Land and Water Legacy | Supporting | GA91 |
| Josh Mandelbaum | Environmental Law and Policy Center | Supporting | GA91 |
| Matt Ohloff | Environmental Law and Policy Center | Supporting | GA91 |
| Nick Laning | IBEW Iowa State Conference | Supporting | GA91 |
| Threase Harms | IBEW Iowa State Conference | Supporting | GA91 |
| Brian Selinger | ITC Midwest | Undecided | GA91 |
| Amy Campbell | Iowa Association of County Conservation Boards | Supporting | GA91 |
| Craig Patterson | Iowa Association of County Conservation Boards | Supporting | GA91 |
| Carolann Jensen | Iowa Board of Regents | Undecided | GA91 |
| Jason Chapman | Iowa Board of Regents | Undecided | GA91 |
| Jennifer Harbison | Iowa Board of Regents | Undecided | GA91 |
| Jillian Carlson | Iowa Board of Regents | 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 |
| Haley Hook | Iowa Department of Agriculture & Land Stewardship | Undecided | GA91 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA91 |
| Deanna Triplett | Iowa Economic Development Authority | Undecided | 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 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Undecided | GA91 |
| Matt Gronewald | Iowa Farm Bureau Federation | Undecided | GA91 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Undecided | GA91 |
| Deanna Triplett | Iowa Finance Authority | Undecided | GA91 |
| Blake DeRouchey | Iowa Homeland Security & Emergency Management Div. | Undecided | GA91 |
| Amy Campbell | Iowa Natural Heritage Foundation | Supporting | GA91 |
| Anna Gray | Iowa Natural Heritage Foundation | Supporting | GA91 |
| Craig Patterson | Iowa Natural Heritage Foundation | Supporting | GA91 |
| Ben Gentz | Missouri River Energy Services | Undecided | GA91 |
| Clair Lewis | Missouri River Energy Services | Undecided | GA91 |
| Kate Walton | Missouri River Energy Services | Undecided | GA91 |
| Matt Eide | Missouri River Energy Services | Undecided | GA91 |
| Amber Markham | The Nature Conservancy | Supporting | GA91 |
| Doug Struyk | The Nature Conservancy | Supporting | GA91 |
| Emily Kavanagh | The Nature Conservancy | Supporting | GA91 |
| Jennifer Dorman | The Nature Conservancy | Supporting | GA91 |
| Jim Carney | The Nature Conservancy | Supporting | GA91 |