| Ryan Sempf | Dubuque Area Chamber of Commerce | Undecided | GA90 |
| Nick Laning | Iowa Chapter of the National Emergency Number Association (NENA) | Supporting | GA90 |
| Threase Harms | Iowa Chapter of the National Emergency Number Association (NENA) | Supporting | GA90 |
| Nick Laning | Iowa Emergency Management Association | Supporting | GA90 |
| Threase Harms | Iowa Emergency Management Association | Supporting | GA90 |
| Blake DeRouchey | Iowa Homeland Security & Emergency Management Div. | Undecided | GA90 |
| David Adelman | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Frank Chiodo | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Lillie Brady | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Matt Hinch | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Sara Allen | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Will Rogers | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA90 |
| Sydney Gangestad | Iowa Propane Gas Association | Supporting | GA90 |
| Tim Coonan | Iowa Propane Gas Association | Supporting | GA90 |
| Jim Henter | Iowa Retail Federation | Supporting | GA90 |
| Brad Epperly | Iowa Society of Certified Public Accountants | Undecided | GA90 |
| Dustin Miller | Iowa Society of Certified Public Accountants | Undecided | GA90 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA90 |
| Kristi Harshbarger | Iowa State Association of Counties | Supporting | GA90 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA90 |
| William Peterson | Iowa State Association of Counties | Supporting | GA90 |
| Chris Hagenow | Iowans for Tax Relief | Opposing | GA90 |
| Victoria Sinclair | Iowans for Tax Relief | Opposing | GA90 |