| Julie Vande Hoef | Alliant Energy Corporation | Undecided | GA89 |
| Ted Stopulos | Alliant Energy Corporation | Undecided | GA89 |
| Cody Smith | Center for Rural Affairs | Opposing | GA89 |
| John Cacciatore | Center for Rural Affairs | Opposing | GA89 |
| Johnathan Hladik | Center for Rural Affairs | Opposing | GA89 |
| Kerry Koonce | Central Iowa Power Cooperative (CIPCO) | Supporting | GA89 |
| Jim Obradovich | Coalition for Iowa Woodlands and Trees | Opposing | GA89 |
| Robert Mulqueen | Coalition for Iowa Woodlands and Trees | Opposing | GA89 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA89 |
| Steve Falck | Environmental Law and Policy Center | Undecided | GA89 |
| Nick Laning | IBEW Iowa State Conference | Supporting | GA89 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA89 |
| Threase Harms | IBEW Iowa State Conference | Supporting | GA89 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA89 |
| Todd Schulz | ITC Midwest | Undecided | GA89 |
| Brad Epperly | Iowa Association of Electric Cooperatives | Supporting | GA89 |
| Dustin Miller | Iowa Association of Electric Cooperatives | Supporting | GA89 |
| Kevin Condon | Iowa Association of Electric Cooperatives | Supporting | GA89 |
| Alex Cutchey | Iowa Association of Municipal Utilities | Supporting | GA89 |
| Brad Epperly | Iowa Association of Municipal Utilities | Supporting | GA89 |
| Dustin Miller | Iowa Association of Municipal Utilities | Supporting | GA89 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA89 |
| Jordan Oster | Iowa Environmental Council | Undecided | GA89 |
| Kerri Johannsen | Iowa Environmental Council | Undecided | GA89 |
| Michael Schmidt | Iowa Environmental Council | Undecided | GA89 |
| Don Petersen | Iowa Farm Bureau Federation | Opposing | GA89 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Opposing | GA89 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Opposing | GA89 |
| Bobby Martens | Iowa Institute for Cooperatives | Supporting | GA89 |
| Katie Hall | Iowa Institute for Cooperatives | Supporting | GA89 |
| Mike St. Clair | Iowa Institute for Cooperatives | Supporting | GA89 |
| Maison Bleam | Iowa Utilities Board | Undecided | GA89 |
| David Adelman | MidAmerican Energy Company | Supporting | GA89 |
| Frank Chiodo | MidAmerican Energy Company | Supporting | GA89 |
| Matt Hinch | MidAmerican Energy Company | Supporting | GA89 |
| Onnalee Gettler | MidAmerican Energy Company | Supporting | GA89 |
| Sara Allen | MidAmerican Energy Company | Supporting | GA89 |
| Scott Newhard | MidAmerican Energy Company | Supporting | GA89 |
| Kate Walton | Missouri River Energy Services | Supporting | GA89 |
| Kate Walton | Missouri River Energy Services | Undecided | GA89 |
| Kersten Johnson | Missouri River Energy Services | Supporting | GA89 |
| Kersten Johnson | Missouri River Energy Services | Undecided | GA89 |
| Matt Eide | Missouri River Energy Services | Supporting | GA89 |
| Matt Eide | Missouri River Energy Services | Undecided | GA89 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA89 |