| 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 |
| Michael Walker | Brotherhood of Locomotive Engineers and Trainmen | Opposing | GA90 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA90 |
| Chelsea Hoye | Easterseals Iowa | Undecided | GA90 |
| Nick Laning | Easterseals Iowa | Undecided | GA90 |
| Threase Harms | Easterseals Iowa | Undecided | GA90 |
| Bill Dix | Fareway Stores, Inc. | Supporting | GA90 |
| Dale Woolery | Governors Office of Drug Control Policy | Undecided | GA90 |
| Susie Sher | Governors Office of Drug Control Policy | Undecided | GA90 |
| Jay Iverson | Home Builders Association of Iowa | Supporting | 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 |
| Amy Campbell | Iowa Affiliate of the American College of Nurse-Midwives | Opposing | GA90 |
| Brad Lint | Iowa Association for Justice | Undecided | GA90 |
| Kellie Paschke | Iowa Association for Justice | Undecided | GA90 |
| Lisa Davis-Cook | Iowa Association for Justice | Undecided | GA90 |
| Troy Skinner | Iowa Association for Justice | Undecided | 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 |
| Amy Campbell | Iowa Behavioral Health Association (IBHA) | Opposing | GA90 |
| Craig Patterson | Iowa Behavioral Health Association (IBHA) | Opposing | GA90 |
| Larry Murphy | Iowa Catholic Conference | Undecided | GA90 |
| Tom Chapman | Iowa Catholic Conference | Undecided | GA90 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA90 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA90 |
| Amy Campbell | Iowa Chapter of the National Association of Pediatric Nurse Practitioners | Opposing | GA90 |
| Craig Patterson | Iowa Chapter of the National Association of Pediatric Nurse Practitioners | Opposing | 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 | Supporting | GA90 |
| Dustin Miller | Iowa Grocery Industry Association | Supporting | GA90 |
| Eric Goranson | Iowa Hotel & Lodging Association | Supporting | GA90 |
| Will Rogers | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Amy Campbell | Iowa Nurse Practitioners Society | Opposing | GA90 |
| Craig Patterson | Iowa Nurse Practitioners Society | Opposing | GA90 |
| Amy Campbell | Iowa Nurses Association | Opposing | GA90 |
| Craig Patterson | Iowa Nurses Association | Opposing | 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 |
| David Adelman | Iowa Travel Industry Partners | Supporting | GA90 |
| John Hall | Marshalltown Area Chamber of Commerce | Undecided | GA90 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA90 |
| Andy Conlin | Opportunity Solutions Project | Supporting | GA90 |
| John Cacciatore | Plumbers and Steam Fitters Local 33 | Opposing | GA90 |
| David Adelman | State Farm Insurance | Undecided | GA90 |
| Frank Chiodo | State Farm Insurance | Undecided | GA90 |
| Lillie Brady | State Farm Insurance | Undecided | GA90 |
| Matt Hinch | State Farm Insurance | Undecided | GA90 |
| Sara Allen | State Farm Insurance | Undecided | GA90 |
| Karl Schilling | United Professionals/UE | Opposing | GA90 |
| Cyndi Pederson | United Way of Central Iowa | Opposing | GA90 |
| Dave Stone | United Way of Central Iowa | Opposing | GA90 |
| Elizabeth Crimmings | United Way of Central Iowa | Opposing | GA90 |
| John Pederson | United Way of Central Iowa | Opposing | GA90 |