| MIke Delaney | Citizens For A Healthy Iowa | Undecided | GA87 |
| Jim Obradovich | Coalition for Iowa Woodlands and Trees | Undecided | GA87 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA87 |
| Steven Schoenebaum | Dow AgroSciences | Withdrawn | GA87 |
| Steven Schoenebaum | Dow AgroSciences | Undecided | GA87 |
| Mark Joyce | DuPont Businesses | Undecided | GA87 |
| Kellie Paschke | FUELIowa | Undecided | GA87 |
| Troy Skinner | FUELIowa | Undecided | GA87 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Jessica Hyland | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA87 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA87 |
| Neila Seaman | Iowa Chapter of Sierra Club | Undecided | GA87 |
| Mike Heller | Iowa Conservation Alliance | Undecided | GA87 |
| Paula Feltner | Iowa Conservation Alliance | Undecided | GA87 |
| Matt Gronewald | Iowa Dept. of Agriculture | Supporting | GA87 |
| Jim Obradovich | Iowa Elk Breeders Association | Undecided | GA87 |
| Connor Slack | Iowa Farmers Union | Undecided | GA87 |
| Dane Schumann | Iowa Farmers Union | Undecided | GA87 |
| Emily Hockins | Iowa Farmers Union | Undecided | GA87 |
| Threase Harms | Iowa Farmers Union | Undecided | GA87 |
| Brad Epperly | Iowa Grocery Industry Association | Undecided | GA87 |
| Dustin Miller | Iowa Grocery Industry Association | Undecided | GA87 |
| Paige Thorson | Iowa Grocery Industry Association | Undecided | GA87 |
| Paula Dierenfeld | Iowa Grocery Industry Association | Undecided | GA87 |
| John Pederson | Iowa Harness Horsemen's Association | Undecided | GA87 |
| Matt Eide | Iowa Harness Horsemen's Association | Undecided | GA87 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Undecided | GA87 |
| Paula Feltner | Iowa Renewable Fuels Association (IRF) | Undecided | GA87 |
| Connor Slack | Iowa Rivers Revival | Undecided | GA87 |
| Dane Schumann | Iowa Rivers Revival | Undecided | GA87 |
| Emily Hockins | Iowa Rivers Revival | Undecided | GA87 |
| Threase Harms | Iowa Rivers Revival | Undecided | GA87 |
| Carol Balvanz | Iowa Soybean Association | Undecided | GA87 |
| Jill Altringer | Iowa Soybean Association | Undecided | GA87 |
| Mike Heller | Iowa State Association of Assessors | Undecided | GA87 |
| Paula Feltner | Iowa State Association of Assessors | Undecided | GA87 |
| Doug Struyk | Iowa Veterinary Medical Association | Undecided | GA87 |
| Jim Carney | Iowa Veterinary Medical Association | Undecided | GA87 |
| Shannon Henson | Iowa Veterinary Medical Association | Undecided | GA87 |
| Mark Joyce | Iowa Whitetail Deer Association | Undecided | GA87 |
| MIke Delaney | Izaak Walton League - Iowa Division | Undecided | GA87 |
| Brice Oakley | Koch Companies Public Sector, LLC and Affiliates | Supporting | GA87 |
| Don Avenson | Koch Companies Public Sector, LLC and Affiliates | Supporting | GA87 |
| Tom Cope | Koch Companies Public Sector, LLC and Affiliates | Supporting | GA87 |
| John Pederson | POET, LLC | Undecided | GA87 |
| Matt Eide | POET, LLC | Undecided | GA87 |
| Steven Schoenebaum | Pattison Sand Company, L.L.C. | Withdrawn | GA87 |
| Steven Schoenebaum | Pattison Sand Company, L.L.C. | Undecided | GA87 |
| Mike Heller | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA87 |
| Paula Feltner | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA87 |
| MIke Delaney | Raccoon River Watershed Association | Undecided | GA87 |
| Steven Schoenebaum | Smithfield Foods, Inc. | Undecided | GA87 |
| Steven Schoenebaum | Syngenta Crop Protection | Undecided | GA87 |