| MRMetal Resource INC. | Hinsdale | IL | — | ◇ UNVERIFIED |
| MSMetal Sales Manufacturing Corporation | Otsego | MN | — | ◇ UNVERIFIED |
| MMMetroplex Metal Fabrication | Mesquite | TX | — | ◇ UNVERIFIED |
| MVMiami Valley Steel Service, INC. | Piqua | OH | — | ◇ UNVERIFIED |
| MCMichels & CO Furniture Mfg | Lynwood | CA | — | ◇ UNVERIFIED |
| MSMichigan Steel Industries INC Dba Michigan Steel Strapping | Taylor | MI | — | ◇ UNVERIFIED |
| MIMid-state Industries Operating, INC. | Arcola | IL | — | ◇ UNVERIFIED |
| MMMillerbernd Manufacturing Company | Winsted | MN | — | ◇ UNVERIFIED |
| MMMission Metals | Rialto | CA | — | ◇ UNVERIFIED |
| MMMk Metalfoils USA INC | Duncan | SC | — | ◇ UNVERIFIED |
| MTMonski Tool* | Elmhurst | IL | — | ◇ UNVERIFIED |
| MSMounsey Steel Products | Erie | MI | — | ◇ UNVERIFIED |
| MIMubea INC | Florence | KY | — | ◇ UNVERIFIED |
| MIMubea INC. | Florence | KY | — | ◇ UNVERIFIED |
| NCNamasco Corporation | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| NMNational Material CO | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| NMNational Material Processing | East Chicago | IN | — | ◇ UNVERIFIED |
| NPNational Processing Company | Chicago | IL | — | ◇ UNVERIFIED |
| NSNational Steel Fabricators | Rice Lake | WI | — | ◇ UNVERIFIED |
| NRNatl Roll Co/vertical Seal CO | Pleasantville | PA | — | ◇ UNVERIFIED |
| NCNewark Carting INC | Newark | NJ | — | ◇ UNVERIFIED |
| NPNew Process Steel - Nps | Alsip | IL | — | ◇ UNVERIFIED |
| NLNiagara Lasalle Corporation | Hammond | IN | — | ◇ UNVERIFIED |
| NLNiagara Lasalle Corporation | Chattanooga | TN | — | ◇ UNVERIFIED |
| NBNielsen & Bainbridge, LLC. | Bridgeview | IL | — | ◇ UNVERIFIED |
| NANorth American Stainless | Ghent | KY | — | ◇ UNVERIFIED |
| NCNorth Coast Steel LLC | Willoughby | OH | — | ◇ UNVERIFIED |
| NENorthern Empire, LLC | Walker | MN | — | ◇ UNVERIFIED |
| NTNss Technologies, INC. | Tyler | TX | — | ◇ UNVERIFIED |
 Nucor Steel Memphis INC | Memphis | TN | — | ◇ UNVERIFIED |
| OSOld School Services | Henderson | TX | — | ◇ UNVERIFIED |
| OSOlympic Steel INC | Detroit | MI | — | ◇ UNVERIFIED |
| OMOmco Midwest Roll Forming | Pierceton | IN | — | ◇ UNVERIFIED |
| OMO'neal Manufacturing Services | Ambridge | PA | — | ◇ UNVERIFIED |
| OSOregon Steel Mills-fontana Div | Fontana | CA | — | ◇ UNVERIFIED |
| OSOutokumpu Stainless | Richburg | SC | — | ◇ UNVERIFIED |
| OSOwens Steel Fabricators, INC. | Dallas | GA | — | ◇ UNVERIFIED |
| PSPacific Steel Group | Bloomington | CA | — | ◇ UNVERIFIED |
| PGPanther Global Technologies | Wixom | MI | — | ◇ UNVERIFIED |
| PMPanther Machine INC | Wixom | MI | — | ◇ UNVERIFIED |
| PMParamount Metals & Supply CO | Paramount | CA | — | ◇ UNVERIFIED |
| PIPaughco, INC | Mound House | NV | — | ◇ UNVERIFIED |
| PFPenny Fabrication | Johnstown | OH | — | ◇ UNVERIFIED |
| PFPittsburgh Flatroll Company | Pittsburgh | PA | — | ◇ UNVERIFIED |
| PSPkm Steel Service - Salina (s Ave C) | Salina | KS | — | ◇ UNVERIFIED |
| PSPowers Solar Frames, LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| PSPowers Steel & Wire Products INC | Phoenix | AZ | — | ◇ UNVERIFIED |
| PSPrecision Specialty Metals INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| PRProfessional Refinishing Org | La Puente | CA | — | ◇ UNVERIFIED |
| PIProfiles INC | Palmer | MA | — | ◇ UNVERIFIED |
