| KWKokoku Wire Industries Corporation | South Bend | IN | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| KIKoncor Industries | Wauseon | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| KCKrall Cast INC | City of Industry | CA | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| KIKramer International | Milwaukee | WI | Primary Metal Manufacturing331510 | — | ◇ UNVERIFIED |
| KTKris - Tech Wire CO INC | Rome | NY | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| KCKroot CORP | Columbus | IN | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| KSK & S Steel Fabrication, INC | Manchester | TN | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| KCKtr Capital Partners | Franklin Park | IL | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| KSKurland Steel CO | Urbana | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| KFKvk Foundry INC | Millington | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| KKKyle Keplinger | Conway Springs | KS | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| LSLaclede Steel | Vandalia | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LSLaclede Steel Company | Madison | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| LCLake Copper Conductors LLC | Elkhart | IN | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| LSLake Shore Foundry CO INC | Waukegan | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| LCLaminating Company of America | Garden Grove | CA | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| LPLa Porte Technologies LLC | La Porte | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LQLa Quinta Plant | Portland | TX | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| LMLaurel Machine & Foundry Hawkes Plant | Laurel | MS | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LSLavin & Sons | North Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| LALazar Anode Technologies LLC | Hawesville | KY | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| LGLeach & Garner CO | North Attleboro | MA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| LELead Enterprises INC | Miami | FL | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| LPLead Products - Houston | Houston | TX | Primary Metal Manufacturing331423 | — | ◇ UNVERIFIED |
| LFLebaron Foundry INC | Brockton, City of | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LFLeed Foundry Inc/st Clair | Saint Clair | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LLLee's Lane Landfill | Louisville | KY | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| LMLeonards Metal Inc-hwy 94 Plant | St. Charles | MO | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| LWLeoni Wire INC | Chicopee | MA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| LSLexington Steel CORP | Bedford Park | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| LMLiberty Mfg INC | Los Angeles | CA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| LGLincoln Global INC | Monterey Park | CA | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| LALiquid Asset Disposal INC | Wheeling | WV | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| LRListerhill Reduction Plant | Muscle Shoals | AL | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| LSLitton Sys INC Kester Solder | Anaheim | CA | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| LLL & L Scrap Metals & Recycling | Gallipolis | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| LMLockheed Martin Sippican | Marion | MA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| LJLock Joint Tube - Tennessee | Chattanooga | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LILodi Iron Works | Galt | CA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| LMLouisiana Mfg CO | Louisiana | MO | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| LDLower Duwamish Waterway | Seattle | WA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| LLLpg Land & Development Corporation | Cheat Lake | WV | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| LSLtv Steel Company Counce Plant | Counce | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LGLukjan Great Plains | Sidney | NE | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| LMLunt Manufacturing CO INC | Schaumburg | IL | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| LMLunt Maufacturing CO INC | Hampshire | IL | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| LFLynchburg Foundry Llc, D/b/a Archer Creek Foundry | Lynchburg | VA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MSM5 Steel Mfg | Los Angeles | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MCMabry Castings LTD | Beaumont | TX | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| MPMaclean Power, L.l.c. | Alabaster | AL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
