| CMCerro Metal Products Company | Newark | CA | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| CACertified Alloys INC | Maple Heights | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CECertified Equip & Mfg CO | Springfield | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CCCham Cal Engineering | Garden Grove | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CCChamplain Cable Berkshire Electric Div | Northampton (leeds) | MA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CSCharleston Steel and Metal Company | North Charleston | SC | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| CFCharlette Foundry | Blackstone | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CEChart Energy & Chemical INC | La Crosse | WI | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| CPCharter Plastics | Titusville | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| CSCharter Steel Cleveland INC (1318007658) | Cleveland | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CWCharter Wire Division CO | Milwaukee | WI | Primary Metal Manufacturing331220 | — | ◇ UNVERIFIED |
| CHChautauqua Hardware CORP | Jamestown | NY | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| COCheckers One Hour Cleaners/washington | Washington | PA | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| CPChemical Pollution Control of Florida LLC - Unit #2 | Deerfield Beach | FL | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| CCChemi Con Materials | Moses Lake | WA | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| CFChester Foundry | Chester | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CMChevron Molycorp Washington Remediation Proj | Washington | PA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CAChicago Aluminum Castings CO INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| CBChippewa Brass & Aluminum Foundry LTD | Chippewa Falls | WI | Primary Metal Manufacturing331520 | — | ◇ UNVERIFIED |
| CIChovanak INC | Helena | MT | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| CPChris Plating | Northbrook | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CIChrist Iron Works, INC. | Kenosha | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CCChromalloy Castings Tampa, Corporation | Tampa | FL | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| CDChrome Deposit CORP | Weirton | WV | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| CLChrysler, LLC | Indianapolis | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CLChuck Lorentz | Montrose | CO | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| CCCianbro Corporation Baltimore Facility | Curtis Bay | MD | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| CRCimco Recycling | Marion | IL | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| CLCircle Lead Products | St Petersburg | FL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| CSCircle Smelting CORP | Beckemeyer | IL | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CACitation Aluminum, LLC | Bay Minette | AL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CDCitation Dycast | Lake Zurich | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| CGCitation Grand Rapids | Grand Rapids | MI | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| CSClarion Sintered Metals | Ridgway | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CMClearfield Mach Co/3rd & Everett Streets | Clearfield | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CEClimax Engineered Materials LLC | Sahuarita | AZ | Primary Metal Manufacturing331411 | — | ◇ UNVERIFIED |
| CRClinch River Casting INC. | Caryville | TN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCCmc - Commercial Metals CO Recycling | Spartanburg | SC | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CCCmc Construction Services | Baton Rouge | LA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CJCmc Joist & Deck | Starke | FL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CRCmc Rebar | Jacksonville | FL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CACnh America LLC | Racine | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| CCColeman Cable INC | North Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CCColeman Cable INC | East Longmeadow | MA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| CFCol Fin Specialty Steel Mfg | New Brighton | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CRColt Refining INC | East Haven | CT | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| CFColumbia Falls Aluminum | Columbia Falls | MT | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| CFColumbia Falls Aluminum Company Building 1 | Columbia Falls | MT | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| CGColumbia Gorge Aluminum Site | Goldendale | WA | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| CMColumbia Metal Products CO | Kansas City | MO | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
