| PBPOET Bioprocessing - Ashton | Ashton | 20–99 | ◐ LIKELY ACTIVE |
| PBPOET Bioprocessing Fairbank LLC | Fairbank | 500+ | ◐ LIKELY ACTIVE |
| PBPoet Bioprocessing Menlo | Menlo | 20–99 | ◐ LIKELY ACTIVE |
| PBPoet Bioprocessing Shell Rock | Shell Rock | 20–99 | ◐ LIKELY ACTIVE |
| PBPOET Biorefining | Gowrie | 20–99 | ◐ LIKELY ACTIVE |
| PBPOET Biorefining Aurthur, LLC | Arthur | 20–99 | ◐ LIKELY ACTIVE |
| PBPoet Biorefining - Coon Rapids, LLC | Coon | 20–99 | ◐ LIKELY ACTIVE |
| PLPoet, LLC | Jewell | 20–99 | ◐ LIKELY ACTIVE |
| PGProcter & Gamble Hair Care Company, LLC | Iowa City | 500+ | ◐ LIKELY ACTIVE |
| PBProliant Biologicals - Boone | Boone | 20–99 | ◐ LIKELY ACTIVE |
| PIPyramid Inc. | Newton | 20–99 | ◐ LIKELY ACTIVE |
| QCQuad County Corn Processors Cooperative | Galva | — | ◐ LIKELY ACTIVE |
| QAQuill Avenue | Boone | 20–99 | ◐ LIKELY ACTIVE |
| STS5g Therapeutics INC | Iowa City | — | ◐ LIKELY ACTIVE |
| SBSergeant Bluff Methyl Ester | Sergeant Bluff | 20–99 | ◐ LIKELY ACTIVE |
| SCsioux city | Sioux City | 20–99 | ◐ LIKELY ACTIVE |
| SDSnedden Drive | Boone | 20–99 | ◐ LIKELY ACTIVE |
| TRTalus Renewables - Boone, IA | Boone | 1–19 | ◐ LIKELY ACTIVE |
| TAThe Andersons Renewables, LLC - Denison Facility | Denison | 20–99 | ◐ LIKELY ACTIVE |
| TSThe Scotts Company - Fort Madison | Fort Madison | 100–499 | ◐ LIKELY ACTIVE |
| TSThe Scotts Company - Pacific Junction | Pacific Junction | 1–19 | ◐ LIKELY ACTIVE |
| TIThombert Inc. | Brooklyn | 20–99 | ◐ LIKELY ACTIVE |
| UGUS Gypsum Fort Dodge | Fort Dodge | 100–499 | ◐ LIKELY ACTIVE |
| UGUS Gyspum Fort Dodge | Fort Dodge | 100–499 | ◐ LIKELY ACTIVE |
Valent Biosciences Osage | Osage | 100–499 | ◐ LIKELY ACTIVE |
| VCValero Charles City Plant | Charles City | 20–99 | ◐ LIKELY ACTIVE |
| VRValero Renewable Fuels | Fort Dodge | 20–99 | ◐ LIKELY ACTIVE |
| VRValero Renewable Fuels Company, LLC dba Valero Albert City Plant | Albert City | 20–99 | ◐ LIKELY ACTIVE |
| VRValero Renewable Fuels Company, LLC dba Valero Hartley Plant | Hartley | 20–99 | ◐ LIKELY ACTIVE |
| VRValero Renewables Fuels Company, LLC, Lakota Plant | Lakota | 20–99 | ◐ LIKELY ACTIVE |
| VNVerbio - Nevada | Nevada | 20–99 | ◐ LIKELY ACTIVE |
| WCWebster City | Webster City | 500+ | ◐ LIKELY ACTIVE |
| WWWIE Wall Lake | Wall Lake | 20–99 | ◐ LIKELY ACTIVE |
| VPVeronica Patton | Davenport | — | ◐ LIKELY ACTIVE |
| APAir Products and Chemicals Inc—bettendorf Nitrogen Plant Located Within Arconic | Bettendorf | — | ◇ UNVERIFIED |
| APAir Products and Chemicals INC - Co2 Recovery Plant | Council Bluffs | — | ◇ UNVERIFIED |
| APAir Products and Chemicals, INC. Co2 Recovery Plant | Nevada | — | ◇ UNVERIFIED |
| BIBreda, Ia 6011 | Breda | — | ◇ UNVERIFIED |
| BRBrightmark Rng Facility - Black Soil | Granville | — | ◇ UNVERIFIED |
| BRBrightmark Rng Facility - Kirkman | Kirkman | — | ◇ UNVERIFIED |
| BRBrightmark Rng Facility - Legacy | Sanborn | — | ◇ UNVERIFIED |
| BRBrightmark Rng Facility - Roorda | Paullina | — | ◇ UNVERIFIED |
| BRBrightmark Rng Facility - Van Ess | Sanborn | — | ◇ UNVERIFIED |
| CICargill INC. Eddyville Leachate Treatment Plant | Eddyville | — | ◇ UNVERIFIED |
| CNCfs North America LLC | Urbandale | — | ◇ UNVERIFIED |
| CNCfs North America LLC | Urbandale | — | ◇ UNVERIFIED |
| CLChemorse, LTD. | Des Moines | — | ◇ UNVERIFIED |
| CIChs INC. | Council Bluffs | — | ◇ UNVERIFIED |
| CCContinental Carbonic-denison | Denison | — | ◇ UNVERIFIED |
| CICryovac Inc, Sealed Air Corporation | Cedar Rapids | — | ◇ UNVERIFIED |