| Steven Van Steenhuyse | American Planning Association Iowa Chapter | Withdrawn | GA88 |
| Steven Van Steenhuyse | American Planning Association Iowa Chapter | Opposing | GA88 |
| Drew Klein | Americans For Prosperity | Undecided | GA88 |
| Tyler Raygor | Americans For Prosperity | Undecided | GA88 |
| Don Brown | Cargill | Supporting | GA88 |
| Johnathan Hladik | Center for Rural Affairs | Supporting | GA88 |
| Katie Rock | Center for Rural Affairs | Supporting | GA88 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA88 |
| Tim Reilly | Department of Revenue | Undecided | GA88 |
| Dane Schumann | Des Moines Water Works | Undecided | GA88 |
| Maddie Wilcox | Des Moines Water Works | Undecided | GA88 |
| Threase Harms | Des Moines Water Works | Undecided | GA88 |
| Mark Joyce | E. I. du Pont de Nemours and Company dba Corteva Agriscience | Undecided | GA88 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Jennifer Kingland | Iowa Association of Realtors | Undecided | GA88 |
| Robert Hartwig | Iowa Bankers Association | Undecided | GA88 |
| Sharon Presnall | Iowa Bankers Association | Undecided | GA88 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA88 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA88 |
| Jake Swanson | Iowa Dept. of Agriculture | Undecided | GA88 |
| Doug Struyk | Iowa Drainage District Association | Undecided | GA88 |
| Jennifer Dorman | Iowa Drainage District Association | Undecided | GA88 |
| Jim Carney | Iowa Drainage District Association | Undecided | GA88 |
| John Torbert | Iowa Drainage District Association | Undecided | GA88 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA88 |
| Cindy Lane | Iowa Environmental Council | Supporting | GA88 |
| Dane Schumann | Iowa Environmental Council | Supporting | GA88 |
| Maddie Wilcox | Iowa Environmental Council | Supporting | GA88 |
| Threase Harms | Iowa Environmental Council | Supporting | GA88 |
| Dane Schumann | Iowa Farmers Union | Supporting | GA88 |
| Dane Schumann | Iowa Farmers Union | Undecided | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Supporting | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Undecided | GA88 |
| Threase Harms | Iowa Farmers Union | Supporting | GA88 |
| Threase Harms | Iowa Farmers Union | Undecided | GA88 |
| Gary Grant | Iowa Hemp Association | Undecided | GA88 |
| Larry Murphy | Iowa Hemp Association | Undecided | GA88 |
| Meghan Malloy | Iowa Hemp Association | Undecided | GA88 |
| Bobby Martens | Iowa Institute for Cooperatives | Undecided | GA88 |
| Katie Hall | Iowa Institute for Cooperatives | Undecided | GA88 |
| Dane Schumann | Iowa Rivers Revival | Undecided | GA88 |
| Maddie Wilcox | Iowa Rivers Revival | Undecided | GA88 |
| Threase Harms | Iowa Rivers Revival | Undecided | GA88 |
| Brad Epperly | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Dustin Miller | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Katie Graham | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Paula Dierenfeld | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Jill Altringer | Iowa Soybean Association | Supporting | GA88 |
| Mike Heller | Iowa State Association of Assessors | Undecided | GA88 |
| Paula Feltner | Iowa State Association of Assessors | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA88 |
| William Peterson | Iowa State Association of Counties | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Opposing | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Opposing | GA88 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA88 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA88 |
| Jim Carney | Iowa State Bar Association | Undecided | GA88 |
| Ernie Adkison | Iowans for Tax Relief | Undecided | GA88 |
| Victoria Sinclair | Iowans for Tax Relief | Undecided | GA88 |
| Tim Wagner | Izaak Walton League - Iowa Division | Supporting | GA88 |
| Gary Grant | NUHemp Group | Undecided | GA88 |
| Larry Murphy | NUHemp Group | Undecided | GA88 |
| Meghan Malloy | NUHemp Group | Undecided | GA88 |
| Amber Markham | The Nature Conservancy | Supporting | GA88 |
| Doug Struyk | The Nature Conservancy | Supporting | GA88 |
| Jennifer Dorman | The Nature Conservancy | Supporting | GA88 |
| Jim Carney | The Nature Conservancy | Supporting | GA88 |
| Eric Goranson | Unilever United States | Supporting | GA88 |
| Karla Fultz McHenry | Unilever United States | Supporting | GA88 |
| Michael Triplett | Unilever United States | Supporting | GA88 |
| Stefani Grant | Unilever United States | Supporting | GA88 |