| Troy Price | AFSCME Iowa Council 61 | Opposing | GA89 |
| Kate Walton | Arconic (Formerly Alcoa) | Undecided | GA89 |
| Matt Eide | Arconic (Formerly Alcoa) | Undecided | GA89 |
| Scott Newhard | Associated General Contractors of Iowa | Supporting | GA89 |
| Kate Walton | CN Rail | Undecided | GA89 |
| Matt Eide | CN Rail | Undecided | GA89 |
| Nicholas Dreeszen | Families United Action Network (FUAN) | Undecided | GA89 |
| ToyA Johnson | Families United Action Network (FUAN) | Undecided | GA89 |
| Whitney Rupe | Families United Action Network (FUAN) | Undecided | GA89 |
| Dale Woolery | Governors Office of Drug Control Policy | Undecided | GA89 |
| Susie Sher | Governors Office of Drug Control Policy | Undecided | GA89 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA89 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA89 |
| Michael McCarthy | Iowa Alliance For Retired Americans | Opposing | GA89 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Supporting | GA89 |
| John Davis | Iowa Association of Business and Industry (ABI) | Supporting | GA89 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Supporting | GA89 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Supporting | GA89 |
| Amy Campbell | Iowa Behavioral Health Association (IBHA) | Undecided | GA89 |
| Craig Patterson | Iowa Behavioral Health Association (IBHA) | Undecided | GA89 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA89 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA89 |
| Alan Kemp | Iowa League of Cities | Supporting | GA89 |
| Daniel Stalder | Iowa League of Cities | Supporting | GA89 |
| Robert Palmer | Iowa League of Cities | Supporting | GA89 |
| Marc Beltrame | Iowa Motor Truck Association | Supporting | GA89 |
| Larry Murphy | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Undecided | GA89 |
| Meghan Malloy | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Undecided | GA89 |
| Jim Henter | Iowa Retail Federation | Supporting | GA89 |
| Kate Walton | Lennox International | Undecided | GA89 |
| Matt Eide | Lennox International | Undecided | GA89 |
| Brian Johnson | NECA - Iowa (NEC) | Supporting | GA89 |
| Justin Hupfer | NECA - Iowa (NEC) | Supporting | GA89 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA89 |
| Kelli Harrison | UAW Region 4 | Opposing | GA89 |
| Karl Schilling | United Professionals/UE | Opposing | GA89 |