| HBHamilton Brass & Aluminum Castings CO | Hamilton | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| HMHarry Masser CO INC | Columbus | OH | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HTHydro Tube Enterprises, INC. (0247100874) | Oberlin | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| IHI H Schlezinger INC | Columbus | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| IAIndalex Aluminum Solutions-girard Plant (0278020021) | Girard | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| IIIntermet Ironton Foundry | Ironton | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ILIronunits LLC | Toledo | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| JHJw Harris CO INC Dba Harris Products Group | Mason | OH | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| KSKilroy Structural Steel CO | Cleveland | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| KCKindt-collins CO | Cleveland | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| KFKnapp Foundry Company INC (1677010014) | Akron | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| KIKoncor Industries | Wauseon | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| LLL & L Scrap Metals & Recycling | Gallipolis | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| MFMansfield Foundry Corporation | Mansfield | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MGMark Gray Enterprises | Columbus | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MUMatalco USA LLC | Canton | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MDMidwest Dicken Fndy | Arcadia | OH | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| NMNational Metal Abrasive Company | Wadsworth | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| NBNew Boston Coke CORP | New Boston | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| NBNucor Bright Bar Orrville | Orrville | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| OCOhio Cold Rolling Company LLC | Yorkville | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ODOhio Decorative Products LLC | Spencerville | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| OPOhio Precious Metals LLC | Jackson | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| OVOhio Valley Aluminum C LLC Niles Facilit | Niles | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| OOOmni Oxide CORP Ohio Oxide Div | Lancaster | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ODOmnisource Defiance | Defiance | OH | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| OAOrmet Aluminum Mill Products CORP | Hannibal | OH | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| OPOrmet Primary Aluminum CORP | Hannibal | OH | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| PGParker Gear Pump Division | Youngstown | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PFPentair Flow Technologies, LLC - Ashland Casting Center | Ashland | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PIPicoma Industries-a Division of Zekelman Industries | Cambridge | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PAPrecision Aluminum INC. | Wadsworth | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| PCPride Cast Metals | Cincinnati | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| QCQuincy Castings, INC. | Quincy | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RMRainbow Muffler & Brake | Sandusky | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RARavenna Aluminum Industries INC | Ravenna | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| RCReliable Casting Corporation | Cincinnati | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| RSRemelt Services INC | Cleveland | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| RSRepublic Steel (slag Processing Facility) | Canton | OH | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| RTRepublic Technologies Intl - Massillon H | Massillon | OH | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| RWRepublic Wire INC | West Chester | OH | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| RRRiver Recycling Industries INC | Cleveland | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| RTRmi Titanium CO. Sodium Plant | Ashtabula | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| RARoss Aluminum Foundries Avon Div | Sidney | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industry, LLC | Orrville | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SSSamuel Steel Pickling CO * | Cleveland | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SEScott Engineering and Procurement, INC. (1431004456) | Loveland | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SPSenco Products INC | Anderson | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| SWSeneca Wire & Mfg CO * | Fostoria | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| SSSewah Studios | Marietta | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
