| BRITTANY LUMLEY | Alliant Energy Corporation | Undecided | GA90 |
| Courtney Craig | Alliant Energy Corporation | Undecided | GA90 |
| Elliott Meyer | Alliant Energy Corporation | Undecided | GA90 |
| Jeffrey Boeyink | Alliant Energy Corporation | Undecided | GA90 |
| Ted Stopulos | Alliant Energy Corporation | Undecided | GA90 |
| Brad Epperly | American Clean Power Association | Supporting | GA90 |
| Casey Nickel | American Clean Power Association | Supporting | GA90 |
| Dustin Miller | American Clean Power Association | Supporting | GA90 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA90 |
| Alex Delworth | Center for Rural Affairs | Undecided | GA90 |
| Brad Epperly | Clean Grid Alliance | Supporting | GA90 |
| Casey Nickel | Clean Grid Alliance | Supporting | GA90 |
| Dustin Miller | Clean Grid Alliance | Supporting | GA90 |
| Jeff Danielson | Clean Grid Alliance | Supporting | GA90 |
| Joseph Buffington | County Planning and Zoning Officials of Iowa | Undecided | GA90 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA90 |
| Josh Mandelbaum | Environmental Law and Policy Center | Opposing | GA90 |
| Steve Falck | Environmental Law and Policy Center | Undecided | GA90 |
| Steve Falck | Environmental Law and Policy Center | Withdrawn | GA90 |
| Steve Falck | Environmental Law and Policy Center | Opposing | 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 |
| Andy Conlin | Invenergy | Supporting | GA90 |
| Dennis Tibben | Invenergy | Supporting | GA90 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| John Davis | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| Kevin Condon | Iowa Association of Electric Cooperatives | Undecided | GA90 |
| David Peck | Iowa Association of Municipal Utilities | Undecided | GA90 |
| Marc Beltrame | Iowa Association of Municipal Utilities | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Nick Boeyink | Iowa Conservative Energy Forum | Supporting | GA90 |
| Deanna Triplett | Iowa Economic Development Authority | Undecided | GA90 |
| Chelsea Hoye | Iowa Environmental Council | Undecided | GA90 |
| Cody Smith | Iowa Environmental Council | Undecided | GA90 |
| Kerri Johannsen | Iowa Environmental Council | Undecided | GA90 |
| Michael Schmidt | Iowa Environmental Council | Undecided | GA90 |
| Threase Harms | Iowa Environmental Council | 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 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA90 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA90 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA90 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA90 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA90 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA90 |
| William Peterson | Iowa State Association of Counties | Opposing | GA90 |
| William Peterson | Iowa State Association of Counties | Undecided | GA90 |
| Jamie Cashman | Iowa State Association of County Supervisors | Opposing | GA90 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA90 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Opposing | GA90 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA90 |
| Lucas Beenken | Iowa State Association of County Supervisors | Opposing | GA90 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA90 |
| William Peterson | Iowa State Association of County Supervisors | Opposing | GA90 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA90 |
| Louis Vander Streek | Iowa Utilities Commission | Undecided | GA90 |
| Maison Bleam | Iowa Utilities Commission | Undecided | GA90 |
| Chaz Allen | Iowa Utility Association | Undecided | GA90 |
| Dylan Gramlich | Laborers International Union of North America | Undecided | GA90 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA90 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA90 |
| Onnalee Gettler | MidAmerican Energy Company | Undecided | GA90 |
| Ben Gentz | Missouri River Energy Services | Undecided | GA90 |
| Kate Walton | Missouri River Energy Services | Undecided | GA90 |
| Madeleine Bradley | Missouri River Energy Services | Undecided | GA90 |
| Matt Eide | Missouri River Energy Services | Undecided | GA90 |
| Christopher Rants | NextEra Energy | Supporting | GA90 |
| John Cacciatore | NextEra Energy | Supporting | GA90 |
| Justin Hupfer | NextEra Energy | Supporting | GA90 |
| Felicia Hilton | North Central States Regional Council of Carpenters | 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 |
| Michael Triplett | Ranger Power | Undecided | GA90 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA90 |
| Gary Grant | Urban County Coalition | Undecided | GA90 |
| Larry Murphy | Urban County Coalition | Undecided | GA90 |