| Jeffrey Boeyink | Alliant Energy Corporation | Opposing | GA90 |
| Taylor McDonald | Alliant Energy Corporation | Opposing | GA90 |
| Ted Stopulos | Alliant Energy Corporation | Opposing | GA90 |
| Brad Epperly | American Clean Power Association | Opposing | GA90 |
| Dustin Miller | American Clean Power Association | Opposing | GA90 |
| Christopher Rants | Center for Rural Affairs | Opposing | GA90 |
| John Cacciatore | Center for Rural Affairs | Opposing | GA90 |
| Kate Hansen | Center for Rural Affairs | Opposing | GA90 |
| Kelli Soyer | Common Good Iowa | Opposing | GA90 |
| Mike Owen | Common Good Iowa | Opposing | GA90 |
| Natalie Veldhouse | Common Good Iowa | Opposing | GA90 |
| Sheila Hansen | Common Good Iowa | Opposing | GA90 |
| Joseph Buffington | County Planning and Zoning Officials of Iowa | Undecided | GA90 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Opposing | GA90 |
| Nick Laning | IBEW Iowa State Conference | Opposing | GA90 |
| Threase Harms | IBEW Iowa State Conference | Opposing | GA90 |
| Andy Conlin | Invenergy | Opposing | GA90 |
| Colleen Smith | Invenergy | Opposing | GA90 |
| Kenna Mulligan-Sissman | Invenergy | Opposing | GA90 |
| Brad Epperly | Iowa Association of Electric Cooperatives | Opposing | GA90 |
| Dustin Miller | Iowa Association of Electric Cooperatives | Opposing | GA90 |
| Kevin Condon | Iowa Association of Electric Cooperatives | Opposing | GA90 |
| John Hirl | Iowa Association of Municipal Utilities | Undecided | GA90 |
| Marc Beltrame | Iowa Association of Municipal Utilities | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Nick Boeyink | Iowa Conservative Energy Forum | Opposing | GA90 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA90 |
| Deanna Triplett | Iowa Economic Development Authority | Undecided | GA90 |
| Chelsea Hoye | Iowa Environmental Council | Opposing | GA90 |
| Kerri Johannsen | Iowa Environmental Council | Opposing | GA90 |
| Threase Harms | Iowa Environmental Council | Opposing | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | 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 |
| Chaz Allen | Iowa Utility Association | Opposing | GA90 |
| Dylan Gramlich | Laborers International Union of North America | Opposing | GA90 |
| Onnalee Gettler | MidAmerican Energy Company | Opposing | 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 |
| Dane Schumann | North Central States Regional Council of Carpenters | Opposing | GA90 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Opposing | GA90 |
| Doug Struyk | The Nature Conservancy | Opposing | GA90 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA90 |
| Jim Carney | The Nature Conservancy | Opposing | GA90 |