 Central Petroleum Company of Iowa | Walcott | — | ● ACTIVE |
 Heartland Asphalt, INC | Mason City | — | ● ACTIVE |
 Reg Synthetic Fuels, LLC | Ames | — | ● ACTIVE |
 Petroblend CORP. | Mason City | — | ● ACTIVE |
| JIJebro INC | Sioux City | 20–99 | ◐ LIKELY ACTIVE |
| ISIpsco Steel-montpelier Wks Ilap | Muscatine | — | ◐ LIKELY ACTIVE |
| IFItw Fluid Products Group | De Witt | — | ◐ LIKELY ACTIVE |
| NPNorthland Products CO | Waterloo | 20–99 | ◐ LIKELY ACTIVE |
| BMBituminous Material & Supply LP | Tama | — | ◐ LIKELY ACTIVE |
| FHFlint Hills Resources Pine Bend LLC - Dubuque Terminal | Dubuque | — | ◐ LIKELY ACTIVE |
| GGerdau | Wilton | — | ◐ LIKELY ACTIVE |
| GLGrowmark Lubricants | Council Bluffs | — | ◐ LIKELY ACTIVE |
| HWHighline Warren | Council Bluffs | — | ◇ UNVERIFIED |
| BABarkley Asphalt INC | Sioux City | — | ◐ LIKELY ACTIVE |
| LPLl Pelling - J St Plant | Cedar Rapids | — | ◐ LIKELY ACTIVE |
| TETexpar Energy, LLC | Davenport | — | ◐ LIKELY ACTIVE |
| WQWendling Quarries, INC - Atalissa / Moscow Plant | Moscow | — | ◐ LIKELY ACTIVE |
| AAAdm Artco | Camanche | — | ◇ UNVERIFIED |
| BMBituminous Materials and Supply, LP | Des Moines | — | ◇ UNVERIFIED |
| BSBlacktop Service Co-plant #5-allison | Allison | — | ◇ UNVERIFIED |
| CCCessford Construction Co-plant 2 | Le Grand | — | ◇ UNVERIFIED |
| COCity of Davenport Public Works Center | Davenport | — | ◇ UNVERIFIED |
| DMDes Moines Asphalt & Paving CO - North Plant | Johnston | — | ◇ UNVERIFIED |
| FHFlint Hills Resources Lp, Algona, Ia | Algona | — | ◇ UNVERIFIED |
| GAGrimes Asphalt & Paving | Des Moines | — | ◇ UNVERIFIED |
| ILInroads, LLC | Elkhart | — | ◇ UNVERIFIED |
| ILInroads, LLC | Des Moines | — | ◇ UNVERIFIED |
| MIManatts, INC. | Brooklyn | — | ◇ UNVERIFIED |
| NANorris Asphalt Paving Co-plant 450 | Harvey | — | ◇ UNVERIFIED |
| OMOmg Midwest Dba Cessford Construction CO | Burlington | — | ◇ UNVERIFIED |
| OMOmg Midwest INC | Johnston | — | ◇ UNVERIFIED |
| RGRed Giant Oil Company | Council Bluffs | — | ◇ UNVERIFIED |
| RGRiverstone Group, INC - Bettendorf | Bettendorf | — | ◇ UNVERIFIED |
| RURs Used Oil Services INC - Former Site of | Des Moines | — | ◇ UNVERIFIED |
| SCSta-bilt Construction CO - Harlan | Harlan | — | ◇ UNVERIFIED |
| ARAtlas Roofing Corporation | Clinton | 20–99 | ◐ LIKELY ACTIVE |
| BCBainbridge Construction L.l.c. | Kingsley | — | ◐ LIKELY ACTIVE |
| HWHighline Warren Council Bluffs Mfg | Council Bluffs | 100–499 | ◐ LIKELY ACTIVE |
| IDITW DeWitt Pro Brands | De Witt | 1–19 | ◐ LIKELY ACTIVE |
| AWAqua Waste Water Eaters | Richland | — | ◇ UNVERIFIED |
| BCBituma Corporation | Marquette | — | ◇ UNVERIFIED |
| ILInroads, LLC | Des Moines | — | ◇ UNVERIFIED |
| MIManatt's, INC. | Ames | — | ◇ UNVERIFIED |
| MCMathy Construction CO Plant 4 | Anamosa | — | ◇ UNVERIFIED |
| RIRock Island Lubricants Company | Eldridge | — | ◇ UNVERIFIED |
| SCSullivan Coatings | Newton | — | ◇ UNVERIFIED |
| WLW2fuel LLC | Keokuk | — | ◇ UNVERIFIED |
