| Jeffrey Boeyink | Alliant Energy Corporation | Opposing | GA89 |
| Taylor McDonald | Alliant Energy Corporation | Opposing | GA89 |
| Ted Stopulos | Alliant Energy Corporation | Opposing | GA89 |
| Brad Epperly | American Clean Power Association | Opposing | GA89 |
| Dustin Miller | American Clean Power Association | Opposing | GA89 |
| Christopher Rants | 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) | Opposing | GA89 |
| Joseph Buffington | County Planning and Zoning Officials of Iowa | Opposing | GA89 |
| Josh Mandelbaum | Environmental Law and Policy Center | Opposing | GA89 |
| Steve Falck | Environmental Law and Policy Center | Opposing | GA89 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Opposing | GA89 |
| Nick Laning | IBEW Iowa State Conference | Opposing | GA89 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA89 |
| Threase Harms | IBEW Iowa State Conference | Opposing | GA89 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA89 |
| Andy Conlin | Invenergy | Opposing | GA89 |
| Michael McCarthy | Iowa Alliance For Retired Americans | Opposing | GA89 |
| Kevin Condon | Iowa Association of Electric Cooperatives | Opposing | GA89 |
| Alex Cutchey | Iowa Association of Municipal Utilities | Opposing | GA89 |
| Joe Murphy | Iowa Business Council | Undecided | GA89 |
| Bob Rafferty | Iowa Business for Clean Energy | Opposing | GA89 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA89 |
| Kelly Meyers | Iowa Cattlemen's Association | Undecided | GA89 |
| Logan Murray | Iowa Cattlemen's Association | Undecided | GA89 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA89 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA89 |
| Brian Carter | Iowa Conference of United Methodist Church | Opposing | GA89 |
| Gary Nims | Iowa Conference of United Methodist Church | Opposing | GA89 |
| Rita Carter | Iowa Conference of United Methodist Church | Opposing | GA89 |
| Nick Boeyink | Iowa Conservative Energy Forum | Opposing | GA89 |
| Colin Tadlock | Iowa Department of Agriculture & Land Stewardship | Undecided | GA89 |
| Chelsea Hoye | Iowa Environmental Council | Opposing | GA89 |
| Chelsea Hoye | Iowa Environmental Council | Undecided | GA89 |
| Emilee Harris-Puricelli | Iowa Environmental Council | Opposing | GA89 |
| Emilee Harris-Puricelli | Iowa Environmental Council | Undecided | GA89 |
| Kerri Johannsen | Iowa Environmental Council | Opposing | GA89 |
| Michael Schmidt | Iowa Environmental Council | Opposing | GA89 |
| Threase Harms | Iowa Environmental Council | Opposing | GA89 |
| Threase Harms | Iowa Environmental Council | Undecided | GA89 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Undecided | GA89 |
| Matt Gronewald | Iowa Farm Bureau Federation | Undecided | GA89 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Undecided | GA89 |
| Emilee Harris-Puricelli | Iowa Farmers Union | Undecided | GA89 |
| Nick Laning | Iowa Farmers Union | Undecided | GA89 |
| Threase Harms | Iowa Farmers Union | Undecided | GA89 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA89 |
| Irene DeMaris | Iowa Interfaith Power & Light | Opposing | GA89 |
| Christopher Rants | Iowa Solar Energy Trade Association | Opposing | GA89 |
| John Cacciatore | Iowa Solar Energy Trade Association | Opposing | GA89 |
| Mike Heller | Iowa State Association of Assessors | Undecided | GA89 |
| Michael Gronstal | Iowa State Building and Construction Trades | Opposing | GA89 |
| Geri Huser | Iowa Utilities Board | Undecided | GA89 |
| Maison Bleam | Iowa Utilities Board | Undecided | GA89 |
| Chaz Allen | Iowa Utility Association | Opposing | GA89 |
| Michael Gronstal | Iowa Utility Association | Opposing | GA89 |
| Joseph Zahorik | Ironworkers Local 89 | Opposing | GA89 |
| Dylan Gramlich | Laborers International Union of North America | Opposing | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| David Adelman | MidAmerican Energy Company | Opposing | GA89 |
| Frank Chiodo | MidAmerican Energy Company | Opposing | GA89 |
| Lillie Brady | MidAmerican Energy Company | Opposing | GA89 |
| Matt Hinch | MidAmerican Energy Company | Opposing | GA89 |
| Onnalee Gettler | MidAmerican Energy Company | Opposing | GA89 |
| Sara Allen | MidAmerican Energy Company | Opposing | GA89 |
| Kate Walton | Missouri River Energy Services | Undecided | GA89 |
| Madeleine Bradley | Missouri River Energy Services | Undecided | GA89 |
| Matt Eide | Missouri River Energy Services | Undecided | GA89 |
| Julie Smith | Nebraska Municipal Power Pool - NMPP Energy | Opposing | GA89 |
| Brian Johnson | NextEra Energy | Opposing | GA89 |
| Christopher Rants | NextEra Energy | Opposing | GA89 |
| John Cacciatore | NextEra Energy | Opposing | GA89 |
| Justin Hupfer | NextEra Energy | Opposing | GA89 |
| Dane Schumann | North Central States Regional Council of Carpenters | Opposing | GA89 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Opposing | GA89 |
| BRITTANY LUMLEY | Ranger Power | Opposing | GA89 |
| Taylor McDonald | Ranger Power | Opposing | GA89 |
| Doug Struyk | The Nature Conservancy | Opposing | GA89 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA89 |
| Jim Carney | The Nature Conservancy | Opposing | GA89 |
| Kelli Harrison | UAW Region 4 | Opposing | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |