| Jeff Smith | Agribusiness Association of Iowa | Supporting | GA90 |
| Maggie Smith-Fitzgerald | Agribusiness Association of Iowa | Supporting | GA90 |
| Matt Fitzgerald | Agribusiness Association of Iowa | Supporting | GA90 |
| Mike St. Clair | American Property Casualty Insurance Association (APCIA) | Undecided | GA90 |
| Brad Epperly | Bayer U.S. LLC | Supporting | GA90 |
| Casey Nickel | Bayer U.S. LLC | Supporting | GA90 |
| Craig Mischo | Bayer U.S. LLC | Supporting | GA90 |
| Dustin Miller | Bayer U.S. LLC | Supporting | GA90 |
| Jefferson Fink | Coalition for Iowa Woodlands and Trees | Undecided | GA90 |
| Jim Obradovich | Coalition for Iowa Woodlands and Trees | Undecided | GA90 |
| Victoria Sinclair | Coalition for Iowa Woodlands and Trees | Undecided | GA90 |
| Mark Joyce | Corteva Agriscience | Supporting | GA90 |
| Andrew Mertens | Iowa Association for Justice | Opposing | GA90 |
| Kellie Paschke | Iowa Association for Justice | Opposing | GA90 |
| Lisa Davis-Cook | Iowa Association for Justice | Opposing | GA90 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| John Davis | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| David Adelman | Iowa Biotechnology Association | Supporting | GA90 |
| Frank Chiodo | Iowa Biotechnology Association | Supporting | GA90 |
| Matt Hinch | Iowa Biotechnology Association | Supporting | GA90 |
| Paige Thorson | Iowa Biotechnology Association | Supporting | GA90 |
| Sara Allen | Iowa Biotechnology Association | Supporting | GA90 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Opposing | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | 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 |
| Haley Hook | Iowa Department of Agriculture & Land Stewardship | 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 |
| Threase Harms | Iowa Farmers Union | Opposing | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA90 |
| Jefferson Fink | Iowa Honey Producers Association | Undecided | GA90 |
| Jim Obradovich | Iowa Honey Producers Association | Undecided | GA90 |
| Victoria Sinclair | Iowa Honey Producers Association | Undecided | GA90 |
| Doug Struyk | Iowa Soybean Association | Withdrawn | GA90 |
| Doug Struyk | Iowa Soybean Association | Supporting | GA90 |
| Jennifer Dorman | Iowa Soybean Association | Withdrawn | GA90 |
| Jennifer Dorman | Iowa Soybean Association | Supporting | GA90 |
| Jim Carney | Iowa Soybean Association | Withdrawn | GA90 |
| Jim Carney | Iowa Soybean Association | Supporting | GA90 |
| Matt Herman | Iowa Soybean Association | Supporting | GA90 |
| Doug Struyk | Iowa State Bar Association | Opposing | GA90 |
| Jennifer Dorman | Iowa State Bar Association | Opposing | GA90 |
| Jim Carney | Iowa State Bar Association | Opposing | GA90 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA90 |
| Mona Bond | Syngenta | Withdrawn | GA90 |
| Mona Bond | Syngenta | Supporting | GA90 |
| Steven Schoenebaum | Syngenta Crop Protection | Undecided | GA90 |
| Steven Schoenebaum | Syngenta Crop Protection | Supporting | GA90 |
| John Strathman | VALOR Iowa | Undecided | GA90 |