| MMMicron Manufacturing Inc. | LaGrange | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| MIMidwest Industrial Contract Services, LLC | Girard | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| MGMistras Group, INC. | Heath | OH | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| MSMobile Skids INC. | Brookfield | OH | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| MEMts Enterprises Llc | Springfield | OH | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| NBNational Bronze & Metals (ohio) INC | Lorain | OH | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| NMNeer Mfg CO | Lexington | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| NANew Age Design & Tool, Inc. | Lagrange | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| NMNew Mansfield Brass and Aluminum | New Washington | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| OVOhio Valley Stamping-assemblies INC. | Mansfield | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OCO'keefe Casting | Lorain | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| OPOptions Plus, INC. | Fredericktown | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PWPaul Wilke & Son, INC. | Cincinnati | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| PFPenny Fabrication | Johnstown | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| PUPetmin USA Incorporated (0204012023) | Ashtabula | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| PMPhillips Mfg.& Tower CO Dba Shelby Welded Tube | Shelby | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PFPrototype Fabricators Co. | Cleveland | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| PHPtc Holdings Group | Alliance | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| QMQuality Mold INC. | Akron | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| RMRAM Machining, Inc. | Washington Courth House | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RDReebar Die Casting INC. | Waterville | OH | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| RMRichard Mills | Medina | OH | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| RARoss Aluminum Foundries Ii | Sidney | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| RCRoss Casting & Innovation, LLC | Sidney | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| RCRoss Cast Metals | Lancaster | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RTRr Traders & Import Export LLC | Lewis Center | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| SBSeville Bronze | Seville | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| SASeyekcub Aluminum | Uhrichsville | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| SCShape CORP | Trenton | OH | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| SMShardy Machine Services LLC | Burghill | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SSSheffield Steel Products INC | Macedonia | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| SASlob and Sons Pipe & Casing, INC. | Marion | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SISolsil Incorporated (0684000225) | Beverly | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| SPSst Precision Manufacturing INC. | Loveland | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| SCSteel Ceilings INC | Johnstown | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SPSterling Pipe & Tube, INC. | Toledo | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SSSteven Steel Supply | Columbus | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SSSummit Steel Corporation | Chagrin Falls | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| THThe Hamilton Brass & Aluminum Casting CO. | Hamilton | OH | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| TDTherm-o-link Dba Vulkor INC. | Warren | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| TTThe Timken Company | Canton | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| TTThe Timken Steel Corporation | Canton | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| TTThe Timkensteel Corporation | Canton | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| TWThe Wilmington Iron and Metal Company, Inc. | Wilmington | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
 The Worthington Steel Company (1318178701) | Cuyahoga Heights | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| TITimcor, INC | Defiance | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| TCTimkensteel Corporation | Canton | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| TITmk Ipsco | Brookfield | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| TMTomco Machining INC | Dayton | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TMTpc Metals LLC | Bryan | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
