| David Scott | American Council of Engineering Companies | Undecided | GA90 |
| Sandra Conlin | Associated Builders & Contractors of Iowa | Undecided | GA90 |
| Scott Newhard | Associated General Contractors of Iowa | Undecided | GA90 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Undecided | GA90 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA90 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA90 |
| David Peck | Iowa Association of Municipal Utilities | Undecided | GA90 |
| Marc Beltrame | Iowa Association of Municipal Utilities | Undecided | GA90 |
| Emily Piper | Iowa Association of School Boards | Supporting | GA90 |
| Michelle Johnson | Iowa Association of School Boards | Supporting | GA90 |
| James Kersten | Iowa Central Community College | Undecided | GA90 |
| Nick Laning | Iowa Chapter of the Association of Public Safety Communications Officials (APCO) | Supporting | GA90 |
| Threase Harms | Iowa Chapter of the Association of Public Safety Communications Officials (APCO) | Supporting | GA90 |
| Nick Laning | Iowa Chapter of the National Emergency Number Association (NENA) | Undecided | GA90 |
| Threase Harms | Iowa Chapter of the National Emergency Number Association (NENA) | Undecided | GA90 |
| Angela Caulk | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Christian Frankl | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Logan Murray | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Noah Tabor | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Doug Struyk | Iowa Competitive Bidding Alliance, Inc. | Undecided | GA90 |
| Jennifer Dorman | Iowa Competitive Bidding Alliance, Inc. | Undecided | GA90 |
| Jim Carney | Iowa Competitive Bidding Alliance, Inc. | Undecided | GA90 |
| Nick Laning | Iowa Emergency Management Association | Undecided | GA90 |
| Threase Harms | Iowa Emergency Management Association | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Undecided | GA90 |
| Alan Kemp | Iowa League of Cities | Undecided | GA90 |
| Daniel Stalder | Iowa League of Cities | Undecided | GA90 |
| Robert Palmer | Iowa League of Cities | 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 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA90 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Supporting | GA90 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA90 |
| William Peterson | Iowa State Association of County Supervisors | Supporting | GA90 |
| Jon Murphy | Iowa State Building and Construction Trades | Undecided | GA90 |
| Kellie Paschke | Marion County Board of Supervisors | Undecided | GA90 |
| Kelly Meyers | Marion County Board of Supervisors | Undecided | GA90 |
| Ben Hammes | Master Builders of Iowa | Undecided | GA90 |
| Julie Smith | Master Builders of Iowa | Undecided | GA90 |
| Logan Shine | Master Builders of Iowa | Undecided | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Undecided | GA90 |
| John Cacciatore | Plumbers and Steam Fitters Local 33 | Undecided | GA90 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA90 |
| Chloe Gayer | Professional Developers of Iowa (PDI) | Undecided | GA90 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA90 |
| Dave Daughton | Rural School Advocates of Iowa | Supporting | GA90 |
| Margaret Buckton | Rural School Advocates of Iowa | Supporting | GA90 |
| Dave Daughton | School Administrators of Iowa | Supporting | GA90 |
| David Adelman | Sheet Metal Contractors of Iowa | Undecided | GA90 |
| Frank Chiodo | Sheet Metal Contractors of Iowa | Undecided | GA90 |
| Matt Hinch | Sheet Metal Contractors of Iowa | Undecided | GA90 |
| Paige Thorson | Sheet Metal Contractors of Iowa | Undecided | GA90 |
| Sara Allen | Sheet Metal Contractors of Iowa | Undecided | GA90 |
| Margaret Buckton | Urban Education Network of Iowa | Supporting | GA90 |