| FCFord Cleveland Casting Plant | Brook Park | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| FIFusion INC Plant No 2 | Willoughby | OH | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| GAGeneral Aluminum (1667070012) | Ravenna | OH | Primary Metal Manufacturing331524 | — | ◐ LIKELY ACTIVE |
| GAGeneral Aluminum Manufacturing CO | Conneaut | OH | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| GDGm Defiance Casting Operations | Defiance | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| GAGnw Aluminum INC | Alliance | OH | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| GWGriffin Wheel Columbus Plant | Groveport | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| HAHowmet Aerospace INC - Cleveland Works | Cuyahoga Heights | OH | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| LCLiverpool Coil Processing | Valley City | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| MRMagretech-magnesium Refining Technology | Bellevue | OH | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| MMetaldyne | Twinsburg | OH | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| MRMetallic Resources INC | Twinsburg | OH | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| NCNovelis Corporation (0278080136) | Warren | OH | Primary Metal Manufacturing331315 | — | ◐ LIKELY ACTIVE |
| OIOsco Industries, INC. New Boston Divisi (0773010180) | New Boston | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| OIOsco Industries INC Portsmouth Div | Portsmouth | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| OKO.s. Kelly Company (0812100276) | Springfield | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| PCPioneer City Casting CO | Belpre | OH | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| PIPremier Investment Castings Dba Bimac | Dayton | OH | Primary Metal Manufacturing331512 | 20-99 | ◐ LIKELY ACTIVE |
| RAReal Alloy Specialty Products LLC | Elyria | OH | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| RTRmi Titanium CO LLC - Canton Ingot Operations | Canton | OH | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| SISeilkop Industries, INC. | Cincinnati | OH | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| SCSeville Centrifugal Bronze INC | Seville | OH | Primary Metal Manufacturing331525 | — | ◐ LIKELY ACTIVE |
Skyline Steel | Belpre | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| SSSolon Specialty Wire CO | Solon | OH | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| SMSt. Marys Foundry INC. (0306010004) | Saint Marys | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| TAThompson Aluminum Casting CO | Cuyahoga Heights | OH | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| TCTimkensteel CORP - Faircrest Steel Plant | Canton | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| WTWheatland Tube - Warren, a Div. of Zekelman Industries (0278080757) | Warren | OH | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| WOWhemco - Ohio Foundry INC (0302020023) | Lima | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WSWorthington Steel | Cuyahoga Heights | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| YIYoder Industries INC | Dayton | OH | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| BMBull Moose Tube CO - Masury Plant | Masury | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LHL & H Threaded Rods CORP | Dayton | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MMagnode | Trenton | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| RCReliable Castings CORP | Sidney | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| RCRock Creek Aluminum INC | Rock Creek | OH | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| TFTiffin Foundry & Machine | Tiffin | OH | Primary Metal Manufacturing331513 | 1-19 | ◇ UNVERIFIED |
| AHAmerican Heavy Plates | Clarington | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
American Wire and Cable Co | Olmsted Twp | OH | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| ASAstro Shapes LLC | Struthers | OH | Primary Metal Manufacturing331318 | 500+ | ◐ LIKELY ACTIVE |
| BEBrothers Equipment, INC. | Cleveland | OH | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| CSCast Specialties INC | Warrensville Heights | OH | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| CSCleveland-cliffs Steel Corporation | West Chester | OH | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| CSCliffs Steel INC | Cleveland | OH | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| CSCoronado Steel CO | Youngstown | OH | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| HCHTCI, Co. | New Carlisle | OH | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| MIMagretech Incorporated | Bellevue | OH | Primary Metal Manufacturing331410 | 20-99 | ◐ LIKELY ACTIVE |
| MMMidwest Manufacturing & Logistics LLC | Minster | OH | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| OKO.S. Kelly Company | Springfield | OH | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| SISemco INC | Marion | OH | Primary Metal Manufacturing331525 | 20-99 | ◐ LIKELY ACTIVE |