| RFRusselloy Foundry INC | Durant | IA | Primary Metal Manufacturing331511 | 20-99 | ◇ UNVERIFIED |
| ABAcme Brass & Aluminum Foundry | Marshalltown | IA | Primary Metal Manufacturing331524 | 1-19 | ◇ UNVERIFIED |
| DCDenton Castings CO INC | Brandon | IA | Primary Metal Manufacturing331524 | 1-19 | ◇ UNVERIFIED |
| FHF & H Aluminum INC | Charles City | IA | Primary Metal Manufacturing331524 | 1-19 | ◇ UNVERIFIED |
| KSKatelman Steel Fabrication INC | Council Bluffs | IA | Primary Metal Manufacturing331110 | 20-99 | ◇ UNVERIFIED |
| LMLund Mfg CO INC | Farley | IA | Primary Metal Manufacturing331521 | 20-99 | ◇ UNVERIFIED |
| TITri-state Industries INC | Dubuque | IA | Primary Metal Manufacturing331521 | 20-99 | ◇ UNVERIFIED |
| APAce Precision Castings LLC | Marshalltown | IA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Council Bluffs Facility | Council Bluffs | IA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Davenport | Davenport | IA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Mason City Facility | Mason City | IA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| AAArrow Acme CORP. | Webster City | IA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| BFBlackhawk Foundry & Machine CO | Davenport | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BFBloomfield Foundry, INC | Bloomfield | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CPCedar Poly LLC | Bennett | IA | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| CVCrane Valves Fndry Sand Landfill-wa Cnty | Washington | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EIEagle Iron Works | Des Moines | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HHHampton Hydraulics Llc-div of Seabee | Hampton | IA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| ITIpsco Tubulars Incorporated | Camanche | IA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCMax Cast | Kalona | IA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MMepco | Marshalltown | IA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| QAQuandt Auto Salvage | Carroll | IA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| RRyerson | Marshalltown | IA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| SSSivyer Steel CORP | Bettendorf | IA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| TCTwin City Holland LLC - Administrative Id # Only | Davenport | IA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| VPViking Pump Inc-alloys Foundry | Cedar Falls | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GLGFrench, LLC | Arnolds Park | IA | Primary Metal Manufacturing331210 | 1-19 | ◇ UNVERIFIED |
| SISoutheast Iowa Aluminum Foundry, INC. | Keokuk | IA | Primary Metal Manufacturing331314 | 1-19 | ◇ UNVERIFIED |
| TIThe Iron Works LTD. | Des Moines | IA | Primary Metal Manufacturing331110 | 1-19 | ◇ UNVERIFIED |
| TMThorne Metal Works | Parkersburg | IA | Primary Metal Manufacturing331522 | 1-19 | ◇ UNVERIFIED |
| ACAlcast Company Midwest Works LLC | Fairfield | IA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BRBolsinger Rebar INC | Cascade | IA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| DZDee Zee Extrusion | Des Moines | IA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| FMFerguson Mfg. CO. INC. | Spirit Lake | IA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| GLGFrench, LLC | Arnolds Park | IA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ISIntertrade Steel Corporation | Cedar Rapids | IA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| JLJoseph L. Ertl, INC. Dba Scale Models & Dyersville Die Cast | Farley | IA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| RIRusselloy Iron Foundry, LLC | Coralville | IA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| RIRyerson INC. | Eldridge | IA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SSSivyer Steel Corporation | Bettendorf | IA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| TSTeam Staffing Solutions, INC. | Fairfield | IA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
