| David Scott | American Council of Engineering Companies | Opposing | GA90 |
| Doug Struyk | City of Des Moines | Opposing | GA90 |
| Jennifer Dorman | City of Des Moines | Opposing | GA90 |
| Jim Carney | City of Des Moines | Opposing | GA90 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA90 |
| Kelly Meyers | Iowa Cattlemen's Association | Undecided | GA90 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA90 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Jeff Smith | Iowa Corn Growers Association | Opposing | GA90 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Opposing | GA90 |
| Matt Fitzgerald | Iowa Corn Growers Association | Opposing | GA90 |
| Mindy Poldberg | Iowa Corn Growers Association | Opposing | GA90 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA90 |
| Tom Ferguson | Iowa County Attorneys Association | Undecided | GA90 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA90 |
| David Scott | Iowa Good Roads Association | Opposing | GA90 |
| David Adelman | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Frank Chiodo | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Lillie Brady | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Matt Hinch | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Nathan Hohnstein | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| Sara Allen | Iowa Renewable Fuels Association (IRF) | Opposing | GA90 |
| David Scott | Iowa Water Well Association | Opposing | GA90 |
| Onnalee Gettler | MidAmerican Energy Company | Undecided | GA90 |
| Elizabeth Burns-Thompson | Navigator Heartland Greenway LLC | Opposing | GA90 |
| Mark Joyce | Navigator Heartland Greenway LLC | Opposing | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Undecided | GA90 |
| David Scott | Society of Land Surveyors of Iowa | Opposing | GA90 |
| BRITTANY LUMLEY | Summit Carbon Solutions | Opposing | GA90 |
| Courtney Craig | Summit Carbon Solutions | Opposing | GA90 |
| Jake Ketzner | Summit Carbon Solutions | Opposing | GA90 |
| Jeffrey Boeyink | Summit Carbon Solutions | Opposing | GA90 |
| Robert Weiser | Summit Carbon Solutions | Opposing | GA90 |
| Taylor McDonald | Summit Carbon Solutions | Opposing | GA90 |