| Melissa Speed | AFSCME Iowa Council 61 | Opposing | GA90 |
| Drew Klein | Americans For Prosperity | Supporting | GA90 |
| Tyler Raygor | Americans For Prosperity | Supporting | GA90 |
| Brad Epperly | Bayer U.S. LLC | Undecided | GA90 |
| Dustin Miller | Bayer U.S. LLC | Undecided | GA90 |
| Chaney Yeast | Blank Childrens Hospital | Opposing | GA90 |
| Michael Walker | Brotherhood of Locomotive Engineers and Trainmen | Opposing | GA90 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA90 |
| Kelli Soyer | Common Good Iowa | Opposing | GA90 |
| Mike Owen | Common Good Iowa | Opposing | GA90 |
| Natalie Veldhouse | Common Good Iowa | Opposing | GA90 |
| Sheila Hansen | Common Good Iowa | Opposing | GA90 |
| Chelsea Hoye | Easterseals Iowa | Undecided | GA90 |
| Nick Laning | Easterseals Iowa | Undecided | GA90 |
| Threase Harms | Easterseals Iowa | Undecided | GA90 |
| Bill Dix | Fareway Stores, Inc. | Undecided | GA90 |
| Jake Highfill | Home Builders Association of Iowa | Supporting | GA90 |
| Jay Iverson | Home Builders Association of Iowa | Supporting | GA90 |
| Mark Joyce | Hy-Vee, Inc. | Undecided | GA90 |
| Teresa Bomhoff | IA Mental Health Planning Council | Opposing | GA90 |
| Nick Laning | IBEW Iowa State Conference | Opposing | GA90 |
| Connie Ryan | Interfaith Alliance of Iowa Action Fund | Opposing | GA90 |
| Chelsea Hoye | Iowa Alliance of YMCA's | Undecided | GA90 |
| Nick Laning | Iowa Alliance of YMCA's | Undecided | GA90 |
| Threase Harms | Iowa Alliance of YMCA's | Undecided | GA90 |
| Brad Lint | Iowa Association for Justice | Opposing | GA90 |
| Kellie Paschke | Iowa Association for Justice | Opposing | GA90 |
| Lisa Davis-Cook | Iowa Association for Justice | Opposing | GA90 |
| Troy Skinner | 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 |
| James Kersten | Iowa Central Community College | Undecided | GA90 |
| Matthew Covington | Iowa Citizens for Community Improvement Action Fund | Opposing | GA90 |
| Carrie Malone | Iowa Department of Health and Human Services | Undecided | GA90 |
| Dax Oberreuter | Iowa Department of Health and Human Services | Undecided | GA90 |
| Jancy Nielson | Iowa Department of Health and Human Services | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA90 |
| Brad Epperly | Iowa Grocery Industry Association | Undecided | GA90 |
| Dustin Miller | Iowa Grocery Industry Association | Undecided | GA90 |
| Eric Goranson | Iowa Hotel & Lodging Association | Supporting | GA90 |
| Will Rogers | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Larry Murphy | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Undecided | GA90 |
| Eric Goranson | Iowa Restaurant Association | Supporting | GA90 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA90 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA90 |
| Jim Carney | Iowa State Bar Association | Undecided | GA90 |
| Michael Gronstal | Iowa State Building and Construction Trades | Opposing | GA90 |
| Melissa Peterson | Iowa State Education Association | Opposing | GA90 |
| Morgan Miller | Iowa State Education Association | Opposing | GA90 |
| Dylan Gramlich | Laborers International Union of North America | Opposing | GA90 |
| Ben Hammes | Master Builders of Iowa | Undecided | GA90 |
| Julie Smith | Master Builders of Iowa | Undecided | GA90 |
| Christopher Rants | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA90 |
| Justin Hupfer | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA90 |
| Christopher Rants | NECA - Iowa (NEC) | Undecided | GA90 |
| Justin Hupfer | NECA - Iowa (NEC) | Undecided | GA90 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Opposing | GA90 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Opposing | GA90 |
| Andy Conlin | Opportunity Solutions Project | Supporting | GA90 |
| John Cacciatore | Plumbers and Steam Fitters Local 33 | Opposing | GA90 |
| Dave Daughton | Rural School Advocates of Iowa | Undecided | GA90 |
| Margaret Buckton | Rural School Advocates of Iowa | Undecided | GA90 |
| Dave Daughton | School Administrators of Iowa | Undecided | GA90 |
| Brad Epperly | Toppling Goliath Brewing Co. | Undecided | GA90 |
| Dustin Miller | Toppling Goliath Brewing Co. | Undecided | GA90 |
| Kelli Harrison | UAW Region 4 | Opposing | GA90 |
| Margaret Buckton | Urban Education Network of Iowa | Undecided | GA90 |