| Larry Murphy | Agribusiness Assn. of IA | Undecided | GA83 |
| David Scott | American Council of Engineering Companies | Undecided | GA83 |
| David Scott | American Petroleum Institute | Undecided | GA83 |
| Brice Oakley | Casey's General Stores | Opposing | GA83 |
| Don Avenson | Casey's General Stores | Opposing | GA83 |
| Tom Cope | Casey's General Stores | Opposing | GA83 |
| Linda Kinman | Des Moines Water Works | Undecided | GA83 |
| Bill Wimmer | Hy-Vee, Inc. | Opposing | GA83 |
| Craig Schoenfeld | Hy-Vee, Inc. | Opposing | GA83 |
| John Gilliland | IA. Assn. of Business and Industry (ABI) | Opposing | GA83 |
| John Gilliland | IA. Assn. of Business and Industry (ABI) | Undecided | GA83 |
| Michael Ralston | IA. Assn. of Business and Industry (ABI) | Opposing | GA83 |
| Michael Ralston | IA. Assn. of Business and Industry (ABI) | Undecided | GA83 |
| Nicole Crain | IA. Assn. of Business and Industry (ABI) | Opposing | GA83 |
| Nicole Crain | IA. Assn. of Business and Industry (ABI) | Undecided | GA83 |
| Linda Kinman | IA. Assn. of Water Agencies | Undecided | GA83 |
| Lyle Krewson | IA. Chapter of Sierra Club | Undecided | GA83 |
| Scott Scheidel | IA. Comprehensive Petroleum Storage Tank Fund Board | Opposing | GA83 |
| Sharon Tahtinen | IA. Dept. of Natural Resources | Supporting | GA83 |
| David Scott | IA. Engineering Society | Undecided | GA83 |
| Brad Epperly | IA. Grocery Industry Assn. | Opposing | GA83 |
| Brad Epperly | IA. Grocery Industry Assn. | Undecided | GA83 |
| James West | IA. Grocery Industry Assn. | Opposing | GA83 |
| James West | IA. Grocery Industry Assn. | Undecided | GA83 |
| Keith Luchtel | IA. Grocery Industry Assn. | Opposing | GA83 |
| Keith Luchtel | IA. Grocery Industry Assn. | Undecided | GA83 |
| Paula Dierenfeld | IA. Grocery Industry Assn. | Opposing | GA83 |
| Paula Dierenfeld | IA. Grocery Industry Assn. | Undecided | GA83 |
| Scott Sundstrom | IA. Grocery Industry Assn. | Opposing | GA83 |
| Scott Sundstrom | IA. Grocery Industry Assn. | Undecided | GA83 |
| Laverne Schroeder | IA. Nebraska Farm Equipment Dealers Assn. | Undecided | GA83 |
| Will Rogers | IA. Nebraska Farm Equipment Dealers Assn. | Undecided | GA83 |
| Jerry Fitzgerald | IA. Renewable Fuels Assn. (IRF) | Undecided | GA83 |
| Maggie Smith-Fitzgerald | IA. Renewable Fuels Assn. (IRF) | Undecided | GA83 |
| Mark Joyce | IA. Renewable Fuels Assn. (IRF) | Undecided | GA83 |
| Emily Piper | IA. Rural Water Assn. | Supporting | GA83 |
| Stephen Larson | IA. State Treasurer's Office | Undecided | GA83 |
| Roy Overton | Izaak Walton League - Iowa Division | Undecided | GA83 |
| Larry Blixt | KWIK Trip, Inc. | Opposing | GA83 |
| John Pederson | Kum and Go | Opposing | GA83 |
| Matt Eide | Kum and Go | Opposing | GA83 |
| Mike Heller | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA83 |
| Paula Feltner | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA83 |
| Dawn Carlson | Petroleum Marketers and Convenience Stores of IA | Opposing | GA83 |
| Kellie Paschke | Petroleum Marketers and Convenience Stores of IA | Opposing | GA83 |
| Troy Skinner | Petroleum Marketers and Convenience Stores of IA | Opposing | GA83 |