| HCHoyt CORP | Englewood | NJ | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| HDHubbell Diecasting | Moultrie | GA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| HIHufcor, INC. | Janesville | WI | Primary Metal Manufacturing331200 | — | ◇ UNVERIFIED |
| HVHuron Valley Steel | Anniston | AL | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| HLHvf LLC | Alexandria | AL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| HPHyde Park Foundry | Hyde Park | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| HAHydro Aluminum | Ellenville | NY | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HAHydro Aluminum Adrian INC | Adrian | MI | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HAHydro Aluminum North America Kalamazoo Operation | Kalamazoo | MI | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HNHydro-extrusion North America | Portland | OR | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| HEHydro Extrusion Portland | Vancouver | WA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| HGHydro Gate Acquisition Corporation | Commerce City | CO | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HTHydro Tube Enterprises, INC. (0247100874) | Oberlin | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| IBIcg Berrien INC | Bridgman | MI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| IWIcon Welding and Fabrication | Bradenton | FL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| IHI H Schlezinger INC | Columbus | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| IFIllini Foundry CO | Bartonville | IL | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| IWIllini Wire Works INC | Olney | IL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| IFIllinois Fabricators INC | Bradley | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| IAImpact Alloys Foundry | Dallesport | WA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ICImperial Cleaners & Tailors/washington | Washington | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| IMImperial Metal & Chemical CO | Philadelphia | PA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| IAIndalex Aluminum Solutions | Berlin | CT | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| IAIndalex Aluminum Solutions-girard Plant (0278020021) | Girard | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| IWIndalex West INC. | Modesto | CA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| IFIndustrial Ferguson Foundry CORP | Union | NJ | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| IFIndustrial Foundry | Uxbridge | MA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| IMIndustrial Maint INC | Wichita | KS | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| IWInsteel Wire Products | Mount Airy | NC | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| IWInsteel Wire Products | Wilmington | DE | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| IWInsteel Wire Products | Fredericksburg | VA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| IWInsteel Wire Products INC. | Sanderson | FL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| IZInteramerican Zinc INC | Coldwater | MI | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ICIntermet Corporation Radford | Radford | VA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ICIntermet CORP - Racine Plt (former) | Sturtevant | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| IDIntermet Decatur Foundry | Decatur | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| IHIntermet Havana Foundry | Havana | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| IIIntermet Ironton Foundry | Ironton | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| IAInternational Agile Manufacturing LLC | Statesboro | GA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| IHInternational Hearth Melting LLC | Richland | WA | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| IEInterstate Engineering | Anaheim | CA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| IMInterstate Metals | Fort Morgan | CO | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| ISInterstate Steel CO | Des Plaines | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| IIIntrapac (harrisonburg) INC | Harrisonburg | VA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| ICInvecast Corporation | Warren | MI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| ITIpsco Tubulars INC. | Geneva | NE | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ITIpsco Tubulars Incorporated | Camanche | IA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| IMIron & Metals INC | Denver | CO | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ISIvaco Steel Processing New York LLC | Tonawanda | NY | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| IHIwg High Performance Conductors | Littleton | NH | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
