| JSJmc Steel Group, INC. | Thomasville | AL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JMJohnson Metal Works LLC | Bozeman | MT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JTJoseph T. Ryerson & Son, INC. | Norcross | GA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JSJ & S Maching, INC. | Dayton | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JWJ. W. Burg Machine & Tool, Inc. | Akron | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JIJw Ironworks, LLC | Spokane | WA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KSKairos Supply INC | Gardena | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KBKauth Bros INC | Santa Rosa | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KPKBE Precision Products, LLC | New Baltimore | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KWKBJ Welding Inc | Monroe | WA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KRKims Roll Up INC | Los Angeles | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KMKloeckner Metals CORP. | City of Industry | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KMKloeckner Metals Corporation | Bensalem | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KHKozba Holdings LLC | Billings | MT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
 Kw Steel Structures, LLC | Quincy | MA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LTLeavitt Tube Co., LLC | Northbrook | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LALeggett and Platt INC Dba Parthenon Metal Works | La Vergne | TN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LCLennie Construction CORP. | New York | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LCLGV Coupling, Inc. | Shafter | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LMLincoln Manufacturing | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LPLined Pipe Systems LLC | Rancho Cucamonga | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LILmc Industrial Contracting, INC. | Rochester | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LMLoc Mfg INC | San Jose | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MAMad Acres LLC | Morrison | CO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MFMaeco Fabrication, INC. | Biloxi | MS | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MMMantua Manufacturing Company | Stoughton | MA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCManufactured Component Parts, LTD | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MJMario Juarez-perez | El Cajon | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MAMaruichi American CORP | Santa Fe Springs | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| MMMaryland Metals Processing, INC. | Sparrows Point | MD | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MHMCM Holdings LLC | Minnesota City | MN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MTMetalcraft Tool & Die INC. | Ixonia | WI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MPMetal Partners Rebar, LLC | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MTMetal Tech Products, INC | Detroit | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MMMichael Miraula | North Hollywood | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCMid-south Control Line | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MEMirin Enterprises LLC | Seagoville | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCMiw Corporation | Fall River | MA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MIM&m International | South Plainfield | NJ | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MMM & M Sheet Metal & Steel Fabricators | Williamsport | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MIMola Iron Works | Jersey City | NJ | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NPNational Processing Company | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NANorth American Container Corporation | Newnan | GA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NINorthrock Industries, Inc. | Bohemia | NY | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NPNorthwest Pipe-houston | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NSNorthwest Short Line, LLC | Hamilton | MT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NTNov Tubescope | Odessa | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NTNucor Tubular Products | Madison | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OVOhio Valley Stamping-assemblies INC. | Mansfield | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OSOne Stop Steel | Saint Louis | MO | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
