| James Piazza, Jr. | Heavy Highway Contractors Association | Opposing | GA90 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA90 |
| Kelly Meyers | Iowa Cattlemen's Association | Undecided | GA90 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA90 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA90 |
| Matt Gronewald | Iowa Farm Bureau Federation | Supporting | GA90 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA90 |
| Chelsea Hoye | Iowa Farmers Union | Undecided | GA90 |
| Threase Harms | Iowa Farmers Union | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA90 |
| David Adelman | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Frank Chiodo | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Lillie Brady | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Matt Hinch | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Nathan Hohnstein | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Sara Allen | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA90 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA90 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA90 |
| William Peterson | Iowa State Association of Counties | Undecided | GA90 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA90 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA90 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA90 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA90 |
| Michael Gronstal | Iowa State Building and Construction Trades | Opposing | GA90 |
| Geri Huser | Iowa Utilities Commission | Undecided | GA90 |
| Louis Vander Streek | Iowa Utilities Commission | Undecided | GA90 |
| Maison Bleam | Iowa Utilities Commission | Undecided | GA90 |
| Dylan Gramlich | Laborers International Union of North America | Opposing | GA90 |
| Kellie Paschke | Landus Cooperative | Undecided | GA90 |
| Kelly Meyers | Landus Cooperative | Undecided | GA90 |
| Troy Skinner | Landus Cooperative | Undecided | GA90 |
| Elizabeth Burns-Thompson | Navigator Heartland Greenway LLC | Opposing | GA90 |
| Mark Joyce | Navigator Heartland Greenway LLC | Opposing | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Opposing | GA90 |
| BRITTANY LUMLEY | Summit Carbon Solutions | Opposing | GA90 |
| Courtney Craig | Summit Carbon Solutions | Opposing | GA90 |
| Jake Ketzner | Summit Carbon Solutions | Opposing | GA90 |
| Jeffrey Boeyink | Summit Carbon Solutions | Opposing | GA90 |
| Taylor McDonald | Summit Carbon Solutions | Opposing | GA90 |
| Brad Epperly | TC Energy | Undecided | GA90 |
| Dustin Miller | TC Energy | Undecided | GA90 |
| Kelli Harrison | UAW Region 4 | Opposing | GA90 |
| David Adelman | Wolf Carbon Solutions | Opposing | GA90 |
| Frank Chiodo | Wolf Carbon Solutions | Opposing | GA90 |
| Lillie Brady | Wolf Carbon Solutions | Opposing | GA90 |
| Matt Hinch | Wolf Carbon Solutions | Opposing | GA90 |
| Sara Allen | Wolf Carbon Solutions | Opposing | GA90 |