| 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 |
| ABA & B Foundry & Machining | Franklin | OH | Primary Metal Manufacturing331524 | 20-99 | ◇ UNVERIFIED |
| AWAluminum Wheel Technologies INC | Ravenna | OH | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| ASAmerican Steel Fabricators, LLC | Springfield | OH | Primary Metal Manufacturing331110 | 1-19 | ◇ UNVERIFIED |
| AWArcelormittal Warren | Warren | OH | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| APAvalon Precision Metalsmiths | Cleveland | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| BSBarberton Steel Industries, INC. | Barberton | OH | Primary Metal Manufacturing331513 | 20-99 | ◇ UNVERIFIED |
| CMCast Metals INC | Deshler | OH | Primary Metal Manufacturing331511 | 1-19 | ◇ UNVERIFIED |
| CMCast Metals Technology | Union | OH | Primary Metal Manufacturing331525 | 20-99 | ◇ UNVERIFIED |
| HBHamilton Brass & Aluminum Castings CO | Hamilton | OH | Primary Metal Manufacturing331521 | 1-19 | ◇ UNVERIFIED |
| IHI H Schlezinger INC | Columbus | OH | Primary Metal Manufacturing331492 | 20-99 | ◇ UNVERIFIED |
| MTMid-ohio Tubing LLC | Butler | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OEOpw Engineered Systems | Lebanon | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SRSeneca Railroad & Mining | Bellevue | OH | Primary Metal Manufacturing331110 | 1-19 | ◇ UNVERIFIED |
| SSSewah Studios | Marietta | OH | Primary Metal Manufacturing331524 | 20-99 | ◇ UNVERIFIED |
| TFTrumbull Foundry & Alloy | Niles | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| WPWm. Powell Valve CO. | Cincinnati | OH | Primary Metal Manufacturing331528 | 20-99 | ◇ UNVERIFIED |
| XFXenia Foundry | Xenia | OH | Primary Metal Manufacturing331511 | 20-99 | ◇ UNVERIFIED |
| ASAk Steel Corporation - Steubenville Intake Pumphouse | Steubenville | OH | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ASAleris Specialty Products INC | Cleveland | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| APAmerican Processing LLC | Cleveland | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| APAvalon Precision Casting Company LLC | Cleveland | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| BTBeco Tek Mfg INC | Lorain | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| BSBelmont Solids Control | Campbell | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| CSCalmego Specialized Products, LLC | Greenville | OH | Primary Metal Manufacturing331521 | 1-19 | ◇ UNVERIFIED |
| CMCarbide Metals INC | Youngstown | OH | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| CTCast-fab Technologies, INC. | Cincinnati | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CACentral Aluminum Company | Columbus | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| CACertified Alloys INC | Maple Heights | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CSCharter Steel Cleveland INC (1318007658) | Cleveland | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CSColumbus Steel Castings | Columbus | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| CWCostco Wholesale | Columbus | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| DEDefiance Energy | Defiance | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EGEsab Group INC | Ashtabula | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| FCFlowserve Corporation * | Dayton | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| FFFoote Foundry CO. INC. (0142000119) | Fredericktown | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| FFFunk Finecast INC | Columbus | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| GAGarfield Alloys INC | Garfield Heights | OH | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| GDGe Dover Products Plant | Dover | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| GCGeneral Casting CO Poulton Div | Columbus | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GEGeneral Electric, Tungsten Products Plant | Euclid | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
 Golden Aluminum Extrusions Warren, LLC | Warren | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| GEGould Electronics INC. | Mc Connelsville | OH | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| GLGreene Lyon Metals LLC | Jackson | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| GSG & S Titanium INC | Wooster | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
