| ADArconic Davenport LLC | Riverdale | 500+ | ● ACTIVE |
Flint Cliffs Manufacturing CORP. | Burlington | 20–99 | ● ACTIVE |
| JDJohn Deere Waterloo Works Drivetrain Operations & Foundry | Waterloo | 500+ | ● ACTIVE |
Quality Machine of Iowa Acquisition, INC. | Audubon | 20–99 | ● ACTIVE |
Sioux City Foundry Company | Sioux City | — | ● ACTIVE |
Ssab Iowa INC | Muscatine | 100–499 | ● ACTIVE |
Wdc Acquisition LLC | Creston | 100–499 | ● ACTIVE |
Deco Products Company, Lllp | Decorah | — | ● ACTIVE |
| JDJohn Deere Foundry Waterloo | Waterloo | 100–499 | ● ACTIVE |
| JMJohnson Manufacturing Company, INC | Princeton | 20–99 | ● ACTIVE |
Oertel Metal Works, INC. | Davenport | 20–99 | ● ACTIVE |
| PIPmx Industries, INC. | Cedar Rapids | 100–499 | ● ACTIVE |
G4 Advanced Manufacturing, LLC | Bettendorf | — | ● ACTIVE |
| ISIowa Steel & Wire CO INC | Centerville | 20–99 | ◐ LIKELY ACTIVE |
| KSKeokuk Steel Castings a Matrix Metals CO LLC | Keokuk | 100–499 | ◐ LIKELY ACTIVE |
| MBMorrison Brothers Company | Dubuque | 1–19 | ◐ LIKELY ACTIVE |
| SFSeneca Foundry INC | Webster City | 20–99 | ◐ LIKELY ACTIVE |
| AEA-line Eds | Waterloo | — | ◐ LIKELY ACTIVE |
| ARAmsted Rail Company, INC | Keokuk | — | ◐ LIKELY ACTIVE |
| CMClimax Molybdenum Company | Fort Madison | — | ◐ LIKELY ACTIVE |
| CSCorn States Metal Fabricators INC | West Des Moines | 20–99 | ◐ LIKELY ACTIVE |
| GGemini | Decorah | — | ◐ LIKELY ACTIVE |
| HFHycast Foundry LLC | Fairfield | — | ◐ LIKELY ACTIVE |
Iowa Steel Treating, INC. | Bettendorf | — | ◐ LIKELY ACTIVE |
| PFProgressive Foundry INC | Perry | 20–99 | ◐ LIKELY ACTIVE |
| CVClow Valve CO - Foundry | Oskaloosa | — | ◐ LIKELY ACTIVE |
| JCJohnson Controls Battery Group INC | Red Oak | — | ◐ LIKELY ACTIVE |
| NDNovelis Davenport Casting | Davenport | — | ◐ LIKELY ACTIVE |
| NDNovelis Davenport Finishing | Davenport | — | ◐ LIKELY ACTIVE |
| APAtek Precision Castings | New Hampton | — | ◇ UNVERIFIED |
| BCBesser CO | Sioux City | — | ◇ UNVERIFIED |
| BQBesser Quinn Machine & Foundry | Boone | — | ◇ UNVERIFIED |
| VPViking Pump INC - South Main Facility | Cedar Falls | — | ◇ UNVERIFIED |
| IAIowa Aluminum INC | Albia | — | ◐ LIKELY ACTIVE |
| RFRusselloy Foundry INC | Durant | — | ◇ UNVERIFIED |
| JDJohn Deere Foundry - Waterloo Facility | Waterloo | — | ◐ LIKELY ACTIVE |
| KMKeokuk Mills, LLC | Keokuk | — | ◐ LIKELY ACTIVE |
| PCPremier Casting Services, INC. | Waterloo | 20–99 | ◐ LIKELY ACTIVE |
| LMLeclaire Mfg CO | Bettendorf | — | ◐ LIKELY ACTIVE |
| RMRich Metals CO | Davenport | — | ◐ LIKELY ACTIVE |
| APAce Precision Castings LLC | Marshalltown | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Council Bluffs Facility | Council Bluffs | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Davenport | Davenport | — | ◇ UNVERIFIED |
| AMAlter Metal Recycling - Mason City Facility | Mason City | — | ◇ UNVERIFIED |
| AAArrow Acme CORP. | Webster City | — | ◇ UNVERIFIED |
| BFBlackhawk Foundry & Machine CO | Davenport | — | ◇ UNVERIFIED |
| BFBloomfield Foundry, INC | Bloomfield | — | ◇ UNVERIFIED |
| CPCedar Poly LLC | Bennett | — | ◇ UNVERIFIED |
| CVCrane Valves Fndry Sand Landfill-wa Cnty | Washington | — | ◇ UNVERIFIED |
| DDDyersville Die Cast | Dyersville | — | ◇ UNVERIFIED |