| John Hirl | Ducks Unlimited, Inc. | Undecided | GA90 |
| Marc Beltrame | Ducks Unlimited, Inc. | Undecided | GA90 |
| Amy Campbell | Iowa Association of County Conservation Boards | Opposing | GA90 |
| Amy Campbell | Iowa Association of County Conservation Boards | Undecided | GA90 |
| Craig Patterson | Iowa Association of County Conservation Boards | Opposing | GA90 |
| Craig Patterson | Iowa Association of County Conservation Boards | Undecided | GA90 |
| Nick Laning | Iowa Bicycle Coalition | Undecided | GA90 |
| Threase Harms | Iowa Bicycle Coalition | Undecided | GA90 |
| Eric Goranson | Iowa Bowhunters Association | Opposing | GA90 |
| Kellie Paschke | Iowa Cattlemen's Association | Supporting | GA90 |
| Kelly Meyers | Iowa Cattlemen's Association | Supporting | GA90 |
| Troy Skinner | Iowa Cattlemen's Association | Supporting | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA90 |
| Sydney Gangestad | Iowa Confluence Water Trails | Undecided | GA90 |
| Tim Coonan | Iowa Confluence Water Trails | Undecided | GA90 |
| Jefferson Fink | Iowa Conservation Alliance | Opposing | GA90 |
| Jim Obradovich | Iowa Conservation Alliance | Opposing | GA90 |
| Jeff Smith | Iowa Corn Growers Association | Supporting | GA90 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Supporting | GA90 |
| Matt Fitzgerald | Iowa Corn Growers Association | Supporting | GA90 |
| Mindy Poldberg | Iowa Corn Growers Association | Supporting | GA90 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA90 |
| Chelsea Hoye | Iowa Environmental Council | Opposing | GA90 |
| Threase Harms | Iowa Environmental Council | Opposing | GA90 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA90 |
| Matt Gronewald | Iowa Farm Bureau Federation | Supporting | GA90 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA90 |
| Chelsea Hoye | Iowa Farmers Union | Opposing | GA90 |
| Chelsea Hoye | Iowa Farmers Union | Undecided | GA90 |
| Threase Harms | Iowa Farmers Union | Opposing | GA90 |
| Threase Harms | Iowa Farmers Union | Undecided | GA90 |
| Amy Campbell | Iowa Natural Heritage Foundation | Opposing | GA90 |
| Amy Campbell | Iowa Natural Heritage Foundation | Undecided | GA90 |
| Anna Gray | Iowa Natural Heritage Foundation | Opposing | GA90 |
| Craig Patterson | Iowa Natural Heritage Foundation | Opposing | GA90 |
| Craig Patterson | Iowa Natural Heritage Foundation | Undecided | GA90 |
| Chelsea Hoye | Iowa Rivers Revival | Opposing | GA90 |
| Nick Laning | Iowa Rivers Revival | Opposing | GA90 |
| Threase Harms | Iowa Rivers Revival | Opposing | GA90 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA90 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA90 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA90 |
| William Peterson | Iowa State Association of Counties | Opposing | GA90 |
| Ryan Smith | Iowa Wildlife Federation | Opposing | GA90 |
| Ryan Smith | Iowa Wildlife Federation | Undecided | GA90 |
| Dane Schumann | Izaak Walton League - Iowa Division | Opposing | GA90 |
| Marc Beltrame | Personal Interest-Marc Beltrame | Undecided | GA90 |
| Eric Goranson | Pheasants Forever, Inc. & Quail Forever | Opposing | GA90 |
| Christopher Rants | State Police Officers Council | Opposing | GA90 |
| John Cacciatore | State Police Officers Council | Opposing | GA90 |
| Amber Markham | The Nature Conservancy | Opposing | GA90 |
| Doug Struyk | The Nature Conservancy | Opposing | GA90 |
| Doug Struyk | The Nature Conservancy | Undecided | GA90 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA90 |
| Jennifer Dorman | The Nature Conservancy | Undecided | GA90 |
| Jim Carney | The Nature Conservancy | Opposing | GA90 |
| Jim Carney | The Nature Conservancy | Undecided | GA90 |