| Steven Van Steenhuyse | American Planning Association Iowa Chapter | Opposing | GA89 |
| Brad Epperly | Ames Chamber of Commerce | Undecided | GA89 |
| Dustin Miller | Ames Chamber of Commerce | Undecided | GA89 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA89 |
| Gary Grant | City of Cedar Rapids | Opposing | GA89 |
| Larry Murphy | City of Cedar Rapids | Opposing | GA89 |
| Meghan Malloy | City of Cedar Rapids | Opposing | GA89 |
| Alex Hassel | City of Des Moines | Opposing | GA89 |
| Doug Struyk | City of Des Moines | Opposing | GA89 |
| Jen Schulte | City of Des Moines | Opposing | GA89 |
| Jennifer Dorman | City of Des Moines | Opposing | GA89 |
| Jim Carney | City of Des Moines | Opposing | GA89 |
| Drew Kamp | Council Bluffs Chamber of Commerce | Opposing | GA89 |
| Ryan Sempf | Dubuque Area Chamber of Commerce | Opposing | GA89 |
| Andrea Woodard | Greater Des Moines Partnership | Opposing | GA89 |
| Brad Epperly | Greater Des Moines Partnership | Opposing | GA89 |
| Dustin Miller | Greater Des Moines Partnership | Opposing | GA89 |
| Jeff Smith | Greater Fort Dodge Growth Alliance | Opposing | GA89 |
| Jerry Fitzgerald | Greater Fort Dodge Growth Alliance | Opposing | GA89 |
| Maggie Smith-Fitzgerald | Greater Fort Dodge Growth Alliance | Opposing | GA89 |
| Matt Fitzgerald | Greater Fort Dodge Growth Alliance | Opposing | GA89 |
| Steve Firman | Grow Cedar Valley | Opposing | GA89 |
| Hannah McDowell | Grow Clinton County | Opposing | GA89 |
| Nick Laning | Grow Clinton County | Opposing | GA89 |
| Threase Harms | Grow Clinton County | Opposing | GA89 |
| Jay Iverson | Home Builders Association of Iowa | Undecided | GA89 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| John Davis | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Alex Cutchey | Iowa Association of Municipal Utilities | Opposing | GA89 |
| Brad Epperly | Iowa Association of Municipal Utilities | Opposing | GA89 |
| Dustin Miller | Iowa Association of Municipal Utilities | Opposing | GA89 |
| Brad Epperly | Iowa Chamber Alliance | Opposing | GA89 |
| Dustin Miller | Iowa Chamber Alliance | Opposing | GA89 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA89 |
| Matt McKinney | Iowa League of Cities | Opposing | GA89 |
| RG Schwarm | Iowa League of Cities | Opposing | GA89 |
| Tom Sands | Iowa Taxpayers Association | Supporting | GA89 |
| Ernie Adkison | Iowans for Tax Relief | Supporting | GA89 |
| Victoria Sinclair | Iowans for Tax Relief | Supporting | GA89 |
| Matt McKinney | Krause Group, LTD | Opposing | GA89 |
| RG Schwarm | Krause Group, LTD | Opposing | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| John Hall | Marshalltown Area Chamber of Commerce | Opposing | GA89 |
| David Adelman | Metro Waste Authority | Opposing | GA89 |
| Frank Chiodo | Metro Waste Authority | Opposing | GA89 |
| Matt Hinch | Metro Waste Authority | Opposing | GA89 |
| Sara Allen | Metro Waste Authority | Opposing | GA89 |
| Emily Piper | Piper Sandler | Opposing | GA89 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Opposing | GA89 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Opposing | GA89 |
| Rachael Anderson | Quad Cities Chamber of Commerce | Opposing | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |