| KSKeokuk Steel Castings a Matrix Metals CO LLC | Keokuk | IA | Primary Metal Manufacturing331222 | 100-499 | ◐ LIKELY ACTIVE |
| MMMonett Metals INC | Monett | MO | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| PSPcc Schlosser | Redmond | OR | Primary Metal Manufacturing331512 | 100-499 | ◐ LIKELY ACTIVE |
| RIRexnord Industries LLC Gear Group | Milwaukee | WI | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| ARAmsted Rail Company, INC | Keokuk | IA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| AIAstech INC | Vassar | MI | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| BDBlue Diamond Steel Casting,inc. | Pigeon | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| ECEsco Corporation - Newton | Newton | MS | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| FCFisher Cast Steel Products * | West Jefferson | OH | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| GMGeneral Motors Powetrain | Saginaw | MI | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| HFHowell Foundry LLC | Saint Francisville | LA | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| KIKennametal INC Bedford Facility | Bedford | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| NSNorth Star Casteel Products | Seattle | WA | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| NSNorth Star Casteel Products | Seattle | WA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| PIPrl Ind Inc/cornwall | Cornwall | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| PIPrl Ind Inc/lebanon | Lebanon | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| QEQuality Electric Steel Castings | Houston | TX | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| RSRmf Steel Products | Grandview | MO | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
Sp Manufacturing INC | Livermore | CA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
Stainless Foundry & Engineering INC | Milwaukee | WI | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| TFTexaloy Foundry | Floresville | TX | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| TGThompson Gundrilling INC | Van Nuys | CA | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| ASAmerican Steel Foundries - Granite City | Granite City | IL | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| BABradken Atlas | Tacoma | WA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| GDGm Defiance Casting Operations | Defiance | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| MTMcconway & Torley LLC - Steel Castings Mfg Plant | Pittsburgh | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| MGMe Global INC | Duluth | MN | Nonmetallic Mineral Product Manufacturing327120 | — | ◐ LIKELY ACTIVE |
| AFAmerican Foundry Group / American Alloy Ii | Muskogee | OK | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AFAmerican Foundry Group LLC - Bixby | Bixby | OK | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| ASAmerican Spincast INC (dba Amstock Supply) | Belton | TX | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AWAmerican Welding & Tank LLC | West Jordan | UT | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BBBahr Brothers Manufacturing, INC. | Marion | IN | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| DIDenison Industries Main Foundry | Denison | TX | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| EPEsco Plant 3 | Portland | OR | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| IMIdeal Machine | Tacoma | WA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| KSKenosha Steel Castings | Kenosha | WI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| KPKeokuk Prototype Foundry Company, INC. | Kahoka | MO | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| MIMetaltek International - Sandusky International Division | Sandusky | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| RSRh Sheppard Foundry Bendix Hanover | Hanover | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| SASputhern Alloy CORP | Sylacauga | AL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| SFStar Foundry & Machine | Salt Lake City | UT | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
Superior Forge & Steel Corporation (pittsburgh, Pa) | Pittsburgh | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| UEUniversal Electric Foundry INC | Chicago | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| VPViking Pump INC - South Main Facility | Cedar Falls | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MFMaddox Foundry & Machine Works, LLC | Archer | FL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| TFTiffin Foundry & Machine | Tiffin | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| ACAbex CORP Amsco Div | Anderson | IN | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| ARAmsted Rail | Groveport | OH | Primary Metal Manufacturing331513 | 100-499 | ◐ LIKELY ACTIVE |
| ACArenac Casting INC | Standish | MI | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| BCBct Cast Products LLC | West Allis | WI | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |