| David Scott | American Petroleum Institute | Undecided | GA86 |
| Scott Newhard | Associated General Contractors of Iowa | Opposing | GA86 |
| Scott Newhard | Associated General Contractors of Iowa | Undecided | GA86 |
| Billi Hunt | Du Pont Businesses | Supporting | GA86 |
| Mark Joyce | Du Pont Businesses | Supporting | GA86 |
| Angela Davis | Hy-Vee, Inc. | Undecided | GA86 |
| Bill Wimmer | Hy-Vee, Inc. | Undecided | GA86 |
| Doug Struyk | Iowa Biodiesel Board | Supporting | GA86 |
| Doug Struyk | Iowa Biodiesel Board | Withdrawn | GA86 |
| George Appleby | Iowa Biodiesel Board | Supporting | GA86 |
| George Appleby | Iowa Biodiesel Board | Withdrawn | GA86 |
| Jennifer Tyler | Iowa Biodiesel Board | Supporting | GA86 |
| Jennifer Tyler | Iowa Biodiesel Board | Withdrawn | GA86 |
| Jim Carney | Iowa Biodiesel Board | Supporting | GA86 |
| Jim Carney | Iowa Biodiesel Board | Withdrawn | GA86 |
| Jerry Fitzgerald | Iowa Corn Growers Association(ICG) | Supporting | GA86 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association(ICG) | Supporting | GA86 |
| Matt Fitzgerald | Iowa Corn Growers Association(ICG) | Supporting | GA86 |
| Mindy Poldberg | Iowa Corn Growers Association(ICG) | Supporting | GA86 |
| Sharon Tahtinen | Iowa Dept. of Natural Resources | Undecided | GA86 |
| Mikel Derby | Iowa Dept. of Transportation | Undecided | GA86 |
| David Scott | Iowa Good Roads Association | Undecided | GA86 |
| Brad Epperly | Iowa Grocery Industry Association | Undecided | GA86 |
| Paula Dierenfeld | Iowa Grocery Industry Association | Undecided | GA86 |
| Scott Sundstrom | Iowa Grocery Industry Association | Undecided | GA86 |
| Grant Menke | Iowa Renewable Fuels Association (IRF) | Supporting | GA86 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Undecided | GA86 |
| Paula Feltner | Iowa Renewable Fuels Association (IRF) | Undecided | GA86 |
| Larry Blixt | KWIK Trip, Inc. | Undecided | GA86 |
| Jason Bassett | Kum and Go, L.C. | Opposing | GA86 |
| John Pederson | Kum and Go, L.C. | Opposing | GA86 |
| Laura Book | Kum and Go, L.C. | Opposing | GA86 |
| Matt Eide | Kum and Go, L.C. | Opposing | GA86 |
| Mike Heller | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA86 |
| Paula Feltner | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA86 |
| Dawn Carlson | Petroleum Marketers and Convenience Stores of Iowa | Supporting | GA86 |
| Dustin Noble | Petroleum Marketers and Convenience Stores of Iowa | Supporting | GA86 |
| Kellie Paschke | Petroleum Marketers and Convenience Stores of Iowa | Supporting | GA86 |
| Troy Skinner | Petroleum Marketers and Convenience Stores of Iowa | Supporting | GA86 |
| Scott Hedderich | Renewable Energy Group (REG) | Undecided | GA86 |
| Bob Rafferty | Truckstops of Iowa | Undecided | GA86 |