| MBMiba Bearings US LLC | Mc Connelsville | OH | Primary Metal Manufacturing331314 | 500+ | ◐ LIKELY ACTIVE |
| MCMulti-cast CORP | Wauseon | OH | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| NANeturen America Corporation | Hamilton | OH | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| OAOhio Aluminum Industries INC. | Cleveland | OH | Primary Metal Manufacturing331524 | 100-499 | ◐ LIKELY ACTIVE |
| OPOhio Pickling & Processing | Toledo | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| OSOlympic Steel | Bedford Heights | OH | Primary Metal Manufacturing331221 | 500+ | ◐ LIKELY ACTIVE |
| OIOsco Industries INC - Jackson Div | Jackson | OH | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
Powder Alloy CORP | Loveland | OH | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| PTProduction Tube Cutting | Dayton | OH | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| RERimer Enterprises INC | Waterville | OH | Primary Metal Manufacturing331512 | 20-99 | ◐ LIKELY ACTIVE |
| RHRyder Heil Bronze INC | Bucyrus | OH | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| SISancast INC | Coshocton | OH | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| SEStar Extruded Shapes | Canfield | OH | Primary Metal Manufacturing331314 | 100-499 | ◐ LIKELY ACTIVE |
| TSThomas Steel Strip CORP | Warren | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| TTTooling Technology | Fort Loramie | OH | Primary Metal Manufacturing331524 | — | ◐ LIKELY ACTIVE |
| TLTri-cast LTD | Akron | OH | Primary Metal Manufacturing331313 | 20-99 | ◐ LIKELY ACTIVE |
| URUnited Rolls INC | Canton | OH | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| VIVwm-republic, INC. | Cleveland | OH | Primary Metal Manufacturing331410 | 1-19 | ◐ LIKELY ACTIVE |
| WCWorthington Cylinder Corporation | Westerville | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| WSWorthington Steel (0326000076) | Delta | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| WSWorthington Steel CO | Columbus | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| WSWorthington Steel Company (1409070344) | Monroe | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| ZAZarbana Aluminum Extrusion, LLC | Columbiana | OH | Primary Metal Manufacturing331316 | 20-99 | ◐ LIKELY ACTIVE |
| AFAlbco Foundry and Machine, INC. | Lisbon | OH | Primary Metal Manufacturing331523 | 1-19 | ◐ LIKELY ACTIVE |
| ABArth Brass & Aluminum Castings INC. | Cleveland | OH | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| CFColumbiana Foundry CO | Columbiana | OH | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| CHCsm Horvath Dba Brost Foundry Company | Cleveland | OH | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| FFFalcon Foundry CO | Lowellville | OH | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| ISI. Schumann & CO | Oakwood Village | OH | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| KSKosei St. Marys, CORP. | Saint Marys | OH | Primary Metal Manufacturing331314 | 100-499 | ◐ LIKELY ACTIVE |
| MIMetaltek International - Sandusky International Division | Sandusky | OH | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| MIMiami-cast, INC. | Miamisburg | OH | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| MBMorris Bean & CO * | Yellow Springs | OH | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| RCReliable Casting Corporation | Cincinnati | OH | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| RWRepublic Wire INC | West Chester | OH | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| SDSam Dong Ohio INC | Delaware | OH | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| UCUS Casting | Canton | OH | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| VWVictory White Metal CO | Cleveland | OH | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
| WTWelded Tubes INC | Orwell | OH | Primary Metal Manufacturing331210 | 1-19 | ◐ LIKELY ACTIVE |
| AFAkron Foundry Company | Akron | OH | Primary Metal Manufacturing331524 | 500+ | ◐ LIKELY ACTIVE |
| AIAlcon Industries, INC. (1318007755) | Cleveland | OH | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
American Aluminum Extrusions of Ohio LLC | Canton | OH | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| AVAmg Vanadium LLC | Zanesville | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| ACAstro Coatings INC | Struthers | OH | Primary Metal Manufacturing331318 | — | ◐ LIKELY ACTIVE |
| BCBekaert Corporation (0285010331) | Orrville | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
Bunting Bearings CORP | Delta | OH | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| CSCirba Solutions Us, INC | Lancaster | OH | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| CSCleveland-cliffs Steel CORP - Mansfield Facility | Mansfield | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| CSCleveland-cliffs Steel Corporation | Coshocton | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| DMDatco Manufacturing LLC (0250110856) | Boardman | OH | Primary Metal Manufacturing331316 | — | ◐ LIKELY ACTIVE |