| Travis Templeton | Purple Wave Auction |
| Kirk Tanner | Farmers Cooperative Company |
| Colin Tadlock | IDALS |
| Rod Swoboda | Iowa Master Farmers |
| John Swehla | Dunkerton Coop |
| Scott Svoboda | 21st Century Coop |
| Nate Sutton | Eldon C. Stutsman, Inc. |
| Katie Stutsman | Corteva Agriscience |
| Katie Stutsman | Corteva Agriscience |
| Judd Stretcher | Continental NH3 Products |
| Bert Strayer | Ever.Ag/LaCrosse Seed |
| Bert Strayer | La Crosse Seed |
| Norbert Strasser | Intellifarms Northern Division, Inc. |
| Brent Strahm | Greenfield Contractors |
| Mark Storr | BASF |
| Dave Stewart | Davis Equipment |
| Barbara Stewart | Stewart Conservation Consulting |
| Kevin Steward | Tidal Grow AgriScience |
| Ashlee Stevenson | AgVend |
| Ty Stender | Corteva Agriscience |
| Cody Steinkamp | Doyle MFG |
| Tim Steinbeck | steinbeck and sons |
| Jeff Steinback | Remington Seeds LLC |
| Andrew Stein | Corteva Agriscience |
| Nick Steffens | Persistent BioControl |
| Luke Stamp | DPA Auctions |
| Jerry Spyres | Allied Tank & Construction LLC |
| Joel Spring | Van Diest Supply Company |
| Alyssa Speake | AgVend |
| Todd Soma | Helena |
| Joel Sneller | Cooperative Farmers Elevator |
| Tim Smith | Nutrien |
| Charles Smith | Smith Fertilizer and Grain |
| Ben Smith | Farm Rescue |
| Curt Sloss | UPL |
| Shelly Sims | Intellifarms Northern Division, Inc. |
| Karson Sims | Helena Agri-Enterprsies |
| David Simonson | Nutrien Ag Solutions |
| Helen Simonsen | Simonsen Industries, Inc. |
| Keira Simmons | Iowa State University |
| Ryan Short | Heartland Tank Services |
| Bianca Short | Heartland Tank Services |
| Reilly Shore | AgTrax |
| Kyle Shirk | BASF |
| Philip Shaughnessy | Pro Cooperative |
| Sikandar Shah | SHAH AGRI PVT LTD |
| Jeff Sernett | Bayer Crop Science |
| Aaron Seifert | Ever.Ag |
| Laremy Seelow | Stueve Construction LLC |
| Brent Schwenneker | Bayer |