| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA89 |
| Marc Beltrame | Ducks Unlimited, Inc. | Opposing | GA89 |
| Amy Campbell | Iowa Association of County Conservation Boards | Opposing | GA89 |
| Craig Patterson | Iowa Association of County Conservation Boards | Opposing | GA89 |
| Jennifer Kingland | Iowa Association of Realtors | Opposing | GA89 |
| Nick Laning | Iowa Bicycle Coalition | Opposing | GA89 |
| Threase Harms | Iowa Bicycle Coalition | Opposing | GA89 |
| Eric Goranson | Iowa Bowhunters Association | Opposing | GA89 |
| Brad Epperly | Iowa Chamber Alliance | Opposing | GA89 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA89 |
| Dustin Miller | Iowa Chamber Alliance | Opposing | GA89 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA89 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA89 |
| Jim Obradovich | Iowa Conservation Alliance | Opposing | GA89 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA89 |
| Chip Baltimore | Iowa Environmental Council | Opposing | GA89 |
| Irene DeMaris | Iowa Interfaith Power & Light | Opposing | GA89 |
| Amy Campbell | Iowa Natural Heritage Foundation | Opposing | GA89 |
| Anna Gray | Iowa Natural Heritage Foundation | Opposing | GA89 |
| Craig Patterson | Iowa Natural Heritage Foundation | Opposing | GA89 |
| Chelsea Hoye | Iowa Rivers Revival | Opposing | GA89 |
| Emilee Harris-Puricelli | Iowa Rivers Revival | Opposing | GA89 |
| Nick Laning | Iowa Rivers Revival | Opposing | GA89 |
| Threase Harms | Iowa Rivers Revival | Opposing | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA89 |
| William Peterson | Iowa State Association of Counties | Opposing | GA89 |
| MIke Delaney | Izaak Walton League - Iowa Division | Opposing | GA89 |
| Amy Campbell | League of Women Voters of Iowa | Opposing | GA89 |
| Craig Patterson | League of Women Voters of Iowa | Opposing | GA89 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Withdrawn | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Withdrawn | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| Eric Goranson | Pheasants Forever, Inc. & Quail Forever | Opposing | GA89 |
| Amy Campbell | Polk County - Board of Supervisors | Opposing | GA89 |
| Craig Patterson | Polk County - Board of Supervisors | Opposing | GA89 |
| Sydney Gangestad | Polk County - Board of Supervisors | Opposing | GA89 |
| Tim Coonan | Polk County - Board of Supervisors | Opposing | GA89 |
| Amber Markham | The Nature Conservancy | Opposing | GA89 |
| Doug Struyk | The Nature Conservancy | Opposing | GA89 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA89 |
| Jim Carney | The Nature Conservancy | Opposing | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |