| ISIowa Steel & Wire CO INC | Centerville | IA | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| KSKeokuk Steel Castings a Matrix Metals CO LLC | Keokuk | IA | Primary Metal Manufacturing331222 | 100-499 | ◐ LIKELY ACTIVE |
| MBMorrison Brothers Company | Dubuque | IA | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| SFSeneca Foundry INC | Webster City | IA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| AEA-line Eds | Waterloo | IA | Primary Metal Manufacturing331423 | — | ◐ LIKELY ACTIVE |
| ARAmsted Rail Company, INC | Keokuk | IA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| CMClimax Molybdenum Company | Fort Madison | IA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| CSCorn States Metal Fabricators INC | West Des Moines | IA | Primary Metal Manufacturing331313 | 20-99 | ◐ LIKELY ACTIVE |
| GGemini | Decorah | IA | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| HFHycast Foundry LLC | Fairfield | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
Iowa Steel Treating, INC. | Bettendorf | IA | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| PFProgressive Foundry INC | Perry | IA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CVClow Valve CO - Foundry | Oskaloosa | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| JCJohnson Controls Battery Group INC | Red Oak | IA | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| NDNovelis Davenport Casting | Davenport | IA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| NDNovelis Davenport Finishing | Davenport | IA | Primary Metal Manufacturing331315 | — | ◐ LIKELY ACTIVE |
| IAIowa Aluminum INC | Albia | IA | Primary Metal Manufacturing331312 | — | ◐ LIKELY ACTIVE |
| JDJohn Deere Foundry - Waterloo Facility | Waterloo | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| KMKeokuk Mills, LLC | Keokuk | IA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| PCPremier Casting Services, INC. | Waterloo | IA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| LMLeclaire Mfg CO | Bettendorf | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| RMRich Metals CO | Davenport | IA | Primary Metal Manufacturing331419 | — | ◐ LIKELY ACTIVE |
| ALAnyGlide, LLC | Rock Valley | IA | Primary Metal Manufacturing331318 | 1-19 | ◐ LIKELY ACTIVE |
| CVClow Valve Company - Metal Casting Facility | Oskaloosa | IA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| KIKcng Iowa | Cedar Falls | IA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| MMMonarch Materials Group, Inc. | Adel | IA | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| PGPhoenix Global, LLC-Wilton | Wilton | IA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| SRSSAB R & D of SSAB Iowa Inc. | Muscatine | IA | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| TLTdvib LLC | Boone | IA | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| VPViking Pump Inc - Foundry (A Unit of IDEX Corporation) | Cedar Falls | IA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |