| MCMaster Cutting & Engineering INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| MFMercedes Fabricating, INC. | Chicago Heights | IL | — | ◇ UNVERIFIED |
| MNMesabi Nugget Delaware LLC | Aurora | MN | — | ◇ UNVERIFIED |
| MSMetaldyne Sintered Ridgway LLC | Emporium | PA | — | ◇ UNVERIFIED |
| MPMetal Powder Prod/st Marys | Saint Marys | PA | — | ◇ UNVERIFIED |
| MSMetro Steel and Pipe Supply, INC | Leesburg | FL | — | ◇ UNVERIFIED |
| MSMetro Steel & Pipe Supply, INC. | Tavares | FL | — | ◇ UNVERIFIED |
| MIMetzgermoore, INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| MMMicron Manufacturing Inc. | LaGrange | OH | — | ◇ UNVERIFIED |
| MCMid-continent Coal & Coke | Portage | IN | — | ◇ UNVERIFIED |
| MIMidwest Industrial Contract Services LLC | Youngstown | OH | — | ◇ UNVERIFIED |
| MIMidwest Industrial Contract Services, LLC | Girard | OH | — | ◇ UNVERIFIED |
| MSMidwest Scrap Management INC | Kansas City | MO | — | ◇ UNVERIFIED |
| MSMil Spe Magnetics INC | Pomona | CA | — | ◇ UNVERIFIED |
| MIMiranda Iron Works Inc. | Lake Elsinore | CA | — | ◇ UNVERIFIED |
| MSMiss Steel LLC | Clifton Park | NY | — | ◇ UNVERIFIED |
| MSMiss Steel LLC | Mechanicville | NY | — | ◇ UNVERIFIED |
| MIMK Industries, LLC | Seattle | WA | — | ◇ UNVERIFIED |
| MMM & M Precision LLC | Lockport | NY | — | ◇ UNVERIFIED |
| MIMtm Industrial | Oceanside | CA | — | ◇ UNVERIFIED |
| MEMvi Engineering & Manufacturing INC | Ontario | CA | — | ◇ UNVERIFIED |
| MAMzg Associates Ii LLC | Chicago Heights | IL | — | ◇ UNVERIFIED |
| NPNamco Precision Corp | Seattle | WA | — | ◇ UNVERIFIED |
| NMNational Material Processing, LLC | Chicago | IL | — | ◇ UNVERIFIED |
| NANew Age Design & Tool, Inc. | Lagrange | OH | — | ◇ UNVERIFIED |
| NBNew Boston Coke CORP | New Boston | OH | — | ◇ UNVERIFIED |
| NBNibco - Blytheville Division | Blytheville | AR | — | ◇ UNVERIFIED |
| NANorth American Stainless | Ghent | KY | — | ◇ UNVERIFIED |
| NSNorth South Machinery INC. | La Mirada | CA | — | ◇ UNVERIFIED |
| NSNorth Star Steel Arizona | Golden Valley | AZ | — | ◇ UNVERIFIED |
| NNNortrak North America | Chicago Heights | IL | — | ◇ UNVERIFIED |
| NCNucor Castrip Arkansas, LLC | Blytheville | AR | — | ◇ UNVERIFIED |
| NCNucor Cold Finishing | Darlington | SC | — | ◇ UNVERIFIED |
| NCNucor Corporation Steel Mill | Plymouth | UT | — | ◇ UNVERIFIED |
| NDNucor Dc Warehouse | Birmingham | AL | — | ◇ UNVERIFIED |
| NGNucor Gallatin Steel LLC | Ghent | KY | — | ◇ UNVERIFIED |
| NSNucor Steel Birmingham, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| NSNucor Steel Fl INC | Avon Park | FL | — | ◇ UNVERIFIED |
| NSNucor Steel Longview | Longview | TX | — | ◇ UNVERIFIED |
| NSNucor Steel West Virginia LLC | Apple Grove | WV | — | ◇ UNVERIFIED |
| OCOhio Cold Rolling Company LLC | Yorkville | OH | — | ◇ UNVERIFIED |
| OFOil Field Pipe and Supply CO. | Springfield | MO | — | ◇ UNVERIFIED |
| OGOld Guard Industrial Group, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| OMOlympic Metal Cutting | Montebello | CA | — | ◇ UNVERIFIED |
| OPOmni Products, INC. | Lincolnton | NC | — | ◇ UNVERIFIED |
| OSOps Sales Company | Birmingham | AL | — | ◇ UNVERIFIED |
| OUOpta USA Inc/affival INC | New Kensington | PA | — | ◇ UNVERIFIED |
| OROttawa River Steel | Detroit | MI | — | ◇ UNVERIFIED |
| OSOutokumpu Stainless USA LLC | Haverhill | MA | — | ◇ UNVERIFIED |
| PCParamit Corporation | Morgan Hill | CA | — | ◇ UNVERIFIED |
