| BABadger Alloys | Milwaukee | WI | Primary Metal Manufacturing331510 | 100-499 | ◐ LIKELY ACTIVE |
| BVBeaver Valley Alloy Foundry CO | Monaca | PA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CMCannon Muskegon CORP | Muskegon | MI | Primary Metal Manufacturing331513 | 100-499 | ◐ LIKELY ACTIVE |
| CCCentrifugal Castings | Temple | TX | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| EFEagle Foundry | Eagle Creek | OR | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| HSHaven Steel Products, INC. | Haven | KS | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| HIHensley Industries, INC. | Dallas | TX | Primary Metal Manufacturing331513 | 100-499 | ◐ LIKELY ACTIVE |
| ICInternational Casting CORP | New Baltimore | MI | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| 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 |
| 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 |
| CCChemalloy Company Llc/ Conshohocken | Bryn Mawr | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| CMCircle Machine Rolls, INC. | Sebring | OH | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| CSCoronado Steel CO | Youngstown | OH | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| CFCustom Fabrication & Erection | Philpot | KY | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| HCHuron Casting, INC (blue Diamond Steel Casting) (b7013) | Pigeon | MI | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| JSJorgensen Steel Machining & Fabrication INC. | Tekonsha | MI | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| KMKeokuk Mills, LLC | Keokuk | IA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| MPMayer Pollock Steel CORP | Pottstown | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| MIMcc International, INC. | Mc Donald | PA | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| MAMiller and Company LLC | Mulga | AL | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| MIMinncast INC | Fridley | MN | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |