| Amy Campbell | AARP Iowa | Undecided | GA89 |
| Brad Anderson | AARP Iowa | Undecided | GA89 |
| Craig Patterson | AARP Iowa | Undecided | GA89 |
| Jeffrey Boeyink | Alliant Energy Corporation | Opposing | GA89 |
| Taylor McDonald | Alliant Energy Corporation | Opposing | GA89 |
| Ted Stopulos | Alliant Energy Corporation | Opposing | GA89 |
| Kate Hansen | Center for Rural Affairs | Supporting | GA89 |
| Josh Mandelbaum | Environmental Law and Policy Center | Supporting | GA89 |
| Steve Falck | Environmental Law and Policy Center | Supporting | GA89 |
| Nick Laning | IBEW Iowa State Conference | Opposing | GA89 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA89 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA89 |
| Michael McCarthy | Iowa Alliance For Retired Americans | Undecided | GA89 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| John Davis | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Steffi Lee | Iowa Association of Business and Industry (ABI) | Undecided | GA89 |
| Brad Epperly | Iowa Association of Electric Cooperatives | Opposing | GA89 |
| Dustin Miller | Iowa Association of Electric Cooperatives | Opposing | GA89 |
| Kevin Condon | Iowa Association of Electric Cooperatives | Opposing | GA89 |
| Alex Cutchey | Iowa Association of Municipal Utilities | Opposing | GA89 |
| Bob Rafferty | Iowa Business for Clean Energy | Undecided | 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 | Undecided | GA89 |
| Chelsea Hoye | Iowa Environmental Council | Undecided | GA89 |
| Emilee Harris-Puricelli | Iowa Environmental Council | Supporting | GA89 |
| Emilee Harris-Puricelli | Iowa Environmental Council | Undecided | GA89 |
| Kerri Johannsen | Iowa Environmental Council | Supporting | GA89 |
| Michael Schmidt | Iowa Environmental Council | Supporting | GA89 |
| Threase Harms | Iowa Environmental Council | Supporting | GA89 |
| Threase Harms | Iowa Environmental Council | 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 | Undecided | GA89 |
| Irene DeMaris | Iowa Interfaith Power & Light | Supporting | GA89 |
| Ben Nuelle | Iowa Pork Producers Association | Undecided | GA89 |
| Jeff Smith | Iowa Pork Producers Association | Undecided | GA89 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Undecided | GA89 |
| Matt Fitzgerald | Iowa Pork Producers Association | Undecided | GA89 |
| Jill Altringer | Iowa Poultry Association | Undecided | GA89 |
| Christopher Rants | Iowa Solar Energy Trade Association | Supporting | GA89 |
| John Cacciatore | Iowa Solar Energy Trade Association | Supporting | GA89 |
| Jill Altringer | Iowa State Dairy Association | Undecided | GA89 |
| Jill Altringer | Iowa Turkey Federation | Undecided | GA89 |
| Chaz Allen | Iowa Utility Association | Opposing | GA89 |
| Michael Gronstal | Iowa Utility Association | Opposing | GA89 |
| MIke Delaney | Izaak Walton League - Iowa Division | Supporting | 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 |