| 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 |
| 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 | Opposing | GA90 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA90 |
| Steve Falck | Environmental Law and Policy Center | 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 |
| Mark Joyce | ITC Midwest | Undecided | GA90 |
| Andy Conlin | Invenergy | Opposing | GA90 |
| Colleen Smith | Invenergy | Opposing | GA90 |
| Kenna Mulligan-Sissman | Invenergy | Opposing | 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 |
| Brad Epperly | Iowa Association of Electric Cooperatives | Undecided | GA90 |
| Dustin Miller | Iowa Association of Electric Cooperatives | Undecided | GA90 |
| Kevin Condon | Iowa Association of Electric Cooperatives | Undecided | GA90 |
| John Hirl | Iowa Association of Municipal Utilities | Opposing | GA90 |
| Marc Beltrame | Iowa Association of Municipal Utilities | Opposing | GA90 |
| Carolann Jensen | Iowa Board of Regents | Undecided | GA90 |
| Jennifer Harbison | Iowa Board of Regents | Undecided | GA90 |
| Keith Saunders | Iowa Board of Regents | Undecided | GA90 |
| Mary Braun | Iowa Board of Regents | Undecided | 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 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA90 |
| Nick Boeyink | Iowa Conservative Energy Forum | Opposing | GA90 |
| Nick Boeyink | Iowa Conservative Energy Forum | Undecided | GA90 |
| Jeff Smith | Iowa Corn Growers Association | Undecided | GA90 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Undecided | GA90 |
| Matt Fitzgerald | Iowa Corn Growers Association | Undecided | GA90 |
| Mindy Poldberg | Iowa Corn Growers Association | Undecided | GA90 |
| Haley Hook | Iowa Department of Agriculture & Land Stewardship | Undecided | GA90 |
| Chelsea Hoye | Iowa Environmental Council | Opposing | GA90 |
| Kerri Johannsen | Iowa Environmental Council | Opposing | GA90 |
| Michael Schmidt | Iowa Environmental Council | Opposing | GA90 |
| Threase Harms | Iowa Environmental Council | Opposing | 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 | Opposing | GA90 |
| Chelsea Hoye | Iowa Farmers Union | Undecided | GA90 |
| Nick Laning | Iowa Farmers Union | Undecided | GA90 |
| Threase Harms | Iowa Farmers Union | Opposing | GA90 |
| Threase Harms | Iowa Farmers Union | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA90 |
| Irene DeMaris | Iowa Interfaith Power & Light | Opposing | GA90 |
| Ben Nuelle | Iowa Pork Producers Association | Undecided | GA90 |
| Jeff Smith | Iowa Pork Producers Association | Undecided | GA90 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Undecided | GA90 |
| Matt Fitzgerald | Iowa Pork Producers Association | Undecided | GA90 |
| Christopher Rants | Iowa Solar Energy Trade Association | Opposing | GA90 |
| John Cacciatore | Iowa Solar Energy Trade Association | 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 | Undecided | GA90 |
| Dane Schumann | Izaak Walton League - Iowa Division | 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 |
| 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 | Opposing | GA90 |
| John Cacciatore | NextEra Energy | Opposing | GA90 |
| Justin Hupfer | NextEra Energy | Opposing | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Opposing | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Undecided | GA90 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Opposing | GA90 |
| BRITTANY LUMLEY | Ranger Power | Opposing | GA90 |
| Courtney Craig | Ranger Power | Opposing | GA90 |
| Jeffrey Boeyink | Ranger Power | Opposing | GA90 |
| Michael Triplett | Ranger Power | Opposing | GA90 |
| Taylor McDonald | Ranger Power | Opposing | GA90 |
| Doug Struyk | The Nature Conservancy | Opposing | GA90 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA90 |
| Jim Carney | The Nature Conservancy | Opposing | GA90 |