| Melissa Speed | AFSCME Iowa Council 61 | Supporting | GA90 |
| Chelsea Hoye | American Legion of Iowa | Undecided | GA90 |
| Nick Laning | American Legion of Iowa | Undecided | GA90 |
| Threase Harms | American Legion of Iowa | Undecided | GA90 |
| Brad Epperly | BNSF Railway Co. | Undecided | GA90 |
| Casey Nickel | BNSF Railway Co. | Undecided | GA90 |
| Dustin Miller | BNSF Railway Co. | Undecided | GA90 |
| Brad Epperly | Bayer U.S. LLC | Undecided | GA90 |
| Casey Nickel | Bayer U.S. LLC | Undecided | GA90 |
| Dustin Miller | Bayer U.S. LLC | Undecided | GA90 |
| Brad Epperly | Helena Agri-Enterprises, LLC | Undecided | GA90 |
| Casey Nickel | Helena Agri-Enterprises, LLC | Undecided | GA90 |
| Dustin Miller | Helena Agri-Enterprises, LLC | Undecided | GA90 |
| Brad Epperly | Iowa Automobile Dealers Association | Undecided | GA90 |
| Casey Nickel | Iowa Automobile Dealers Association | Undecided | GA90 |
| Dustin Miller | Iowa Automobile Dealers Association | Undecided | GA90 |
| Brad Epperly | Iowa Collectors Association, Inc. | Undecided | GA90 |
| Casey Nickel | Iowa Collectors Association, Inc. | Undecided | GA90 |
| Dustin Miller | Iowa Collectors Association, Inc. | Undecided | GA90 |
| Michael Olson | Iowa Department of Veterans Affairs | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Supporting | GA90 |
| Brad Epperly | Iowa Grocery Industry Association | Undecided | GA90 |
| Casey Nickel | Iowa Grocery Industry Association | Undecided | GA90 |
| Dustin Miller | Iowa Grocery Industry Association | Undecided | GA90 |
| Brad Epperly | Iowa Society of Certified Public Accountants | Undecided | GA90 |
| Casey Nickel | Iowa Society of Certified Public Accountants | Undecided | GA90 |
| Dustin Miller | Iowa Society of Certified Public Accountants | Undecided | GA90 |
| Kelli Harrison | UAW Region 4 | Supporting | GA90 |
| Karl Schilling | United Professionals/UE | Supporting | GA90 |