| MMMaxxim Medical | Honea Path | SC | — | ◐ LIKELY ACTIVE |
| MEMcdowell Enterprises INC | Elkhart | IN | — | ◐ LIKELY ACTIVE |
| MIMcginnis, INC. - Sheridan Shipyard/marine Ways (0744000168) | South Point | OH | — | ◐ LIKELY ACTIVE |
| MBMchenry Brass INC | Mc Henry | KY | — | ◐ LIKELY ACTIVE |
| MIMcip Industrial Enterprises | Pearland | TX | — | ◐ LIKELY ACTIVE |
| MPMckay Plating CO | Hampton | IL | — | ◐ LIKELY ACTIVE |
| MSMeca Solutions | Green Bay | WI | — | ◐ LIKELY ACTIVE |
| MGMechanical Galv-plating CORP | Sidney | OH | — | ◐ LIKELY ACTIVE |
| MMMeco Metal Finishing | Rock Hill | SC | — | ◐ LIKELY ACTIVE |
| MSMeggit Safety Systems | Simi Valley | CA | — | ◐ LIKELY ACTIVE |
| MMMeminger Metal Finishing INC | Aledo | IL | — | ◐ LIKELY ACTIVE |
| MPMerritt Precision | Merritt Island | FL | — | ◐ LIKELY ACTIVE |
| MTMerritt Tool CO INC - Triumph Structures East Texas | Kilgore | TX | — | ◐ LIKELY ACTIVE |
| MMMertz Manufacturing, LLC | Ponca City | OK | — | ◐ LIKELY ACTIVE |
| MIMetal Improvement CO INC | Shelby Twp | MI | — | ◐ LIKELY ACTIVE |
| MMMetal Masters Foodservice Equipment CO. | Clayton | DE | — | ◐ LIKELY ACTIVE |
| MGMetalplate Galvanizing INC | Atlanta | GA | — | ◐ LIKELY ACTIVE |
| MGMetalplate Galvanizing LP | Birmingham | AL | — | ◐ LIKELY ACTIVE |
| MGMetalplate Galvanizing LP | Jacksonville | FL | — | ◐ LIKELY ACTIVE |
| MGMetalplate Galvanizing, L.p. (plant No. 2) | Birmingham | AL | — | ◐ LIKELY ACTIVE |
| MSMetalsa Structural Products INC | Elizabethtown | KY | — | ◐ LIKELY ACTIVE |
| MSMetal Spinners - a Division of Samuel, Son & CO. (usa) INC. | Rock Falls | IL | — | ◐ LIKELY ACTIVE |
| MUMetals USA Building Products, L. P. | Mesquite | TX | — | ◐ LIKELY ACTIVE |
| MTMetal Technologies INC -three Rivers Gray Iron | Three Rivers | MI | — | ◐ LIKELY ACTIVE |
| MAMetem a Ge Power Business | Allentown | PA | — | ◐ LIKELY ACTIVE |
| MEMetfab Engineering INC | Attleboro Falls | MA | — | ◐ LIKELY ACTIVE |
Meyer Utility Structures, LLC Plant #1662 | Steele | AL | — | ◐ LIKELY ACTIVE |
Meyer Utility Structures LLC Plant 1665 | Lancaster | SC | — | ◐ LIKELY ACTIVE |
| MSMica Steelworks Kaufman | Kaufman | TX | — | ◐ LIKELY ACTIVE |
| MMMichigan Metal Coatings | Port Huron | MI | — | ◐ LIKELY ACTIVE |
| MMicrofoam | Utica | NY | — | ◐ LIKELY ACTIVE |
| MPMid-south Products INC Cape Girardeau | Cape Girardeau | MO | — | ◐ LIKELY ACTIVE |
| MSMid State Plating CO. | Flint | MI | — | ◐ LIKELY ACTIVE |
| MRMidwestern Rust Proof INC | Chicago | IL | — | ◐ LIKELY ACTIVE |
| MIMilacron INC | Mount Orab | OH | — | ◐ LIKELY ACTIVE |
| MGMillennium Galvanizing LLC | Convent | LA | — | ◐ LIKELY ACTIVE |
| MSMiller/greeneville Site Upgrades | Greeneville | TN | — | ◐ LIKELY ACTIVE |
| MWMiller Welding & Mach Sandy Lick Plt | Brookville | PA | — | ◐ LIKELY ACTIVE |
| MSMilton Steel CO | Milton | PA | — | ◐ LIKELY ACTIVE |
| MMMissouri Metals - Division of Samuel Son & CO USA INC | St Louis | MO | — | ◐ LIKELY ACTIVE |
| MPMnp Precision Parts LLC | Rockford | IL | — | ◐ LIKELY ACTIVE |
| MHModern Hard Chrome Service CO | Warren | MI | — | ◐ LIKELY ACTIVE |
| MWModern Welding Company of California | Fresno | CA | — | ◐ LIKELY ACTIVE |
| MIMohawk Industries Inc-floor Mat Print Plant | Calhoun | GA | — | ◐ LIKELY ACTIVE |
| MOMonotech of Mississippi | Iuka | MS | — | ◐ LIKELY ACTIVE |
| MIMoog, INC | Torrance | CA | — | ◐ LIKELY ACTIVE |
| MCMorgan Corporation Mca | Riverside | CA | — | ◐ LIKELY ACTIVE |
| MTMorgan Truck Body LLC | Ehrenberg | AZ | — | ◐ LIKELY ACTIVE |
| MMMorton Metalcraft CO | Morton | IL | — | ◐ LIKELY ACTIVE |
| MWMotor Wheel Commercial Vehicle Systems INC. | Berea | KY | — | ◐ LIKELY ACTIVE |
| MMMountville Mills Plant No 1 | Lagrange | GA | — | ◐ LIKELY ACTIVE |
| MRMountville Rubber CO - Plant 4 | Lagrange | GA | — | ◐ LIKELY ACTIVE |
| MRM & R Plating INC | Washington | MO | — | ◐ LIKELY ACTIVE |
| MIMscm Incorporated | Holland | MI | — | ◐ LIKELY ACTIVE |
| MCMueller CO | Decatur | IL | — | ◐ LIKELY ACTIVE |
| MCMueller CO | Decatur | IL | — | ◐ LIKELY ACTIVE |
| MCMueller CO | Decatur | IL | — | ◐ LIKELY ACTIVE |
| MSMueller Systems | Cleveland | NC | — | ◐ LIKELY ACTIVE |
| MIMultimatic Indiana New Haven | Fort Wayne | IN | — | ◐ LIKELY ACTIVE |
| MGMw Galvanizing INC | Chicago | IL | — | ◐ LIKELY ACTIVE |
| NGN.a. Galvanizing CO - 4400 E 61st Ave | Commerce City | CO | — | ◐ LIKELY ACTIVE |
| NGNational Galvanizing Hs Processing LP | Monroe | MI | — | ◐ LIKELY ACTIVE |
| NONational Oilwell | Houston | TX | — | ◐ LIKELY ACTIVE |
| NONational Oilwell Varco/tulsa Multiplex | Tulsa | OK | — | ◐ LIKELY ACTIVE |
| NRNational Refrigerants INC - Rosenhayn Facility | Rosenhayn | NJ | — | ◐ LIKELY ACTIVE |
| NSNautic Star LLC | Amory | MS | — | ◐ LIKELY ACTIVE |
| NINd Industries (1677130116) | Twinsburg | OH | — | ◐ LIKELY ACTIVE |
| NNelco | Houston | TX | — | ◐ LIKELY ACTIVE |
| NGNelson Global Products INC | Viroqua | WI | — | ◐ LIKELY ACTIVE |
| NLNeofab, LLC | Miami | OK | — | ◐ LIKELY ACTIVE |
| NANew Alenco Windows LTD | Bryan | TX | — | ◐ LIKELY ACTIVE |
| NTNewman Technology, INC (0370010118) | Mansfield | OH | — | ◐ LIKELY ACTIVE |
| NYNew York Blower Company | Laporte | IN | — | ◐ LIKELY ACTIVE |
| NCNiagara Cutter Services Center | Reynoldsville | PA | — | ◐ LIKELY ACTIVE |
| NINibco INC | Blytheville | AR | — | ◐ LIKELY ACTIVE |
| NMNitrex Metal Technologies INC | Mason | MI | — | ◐ LIKELY ACTIVE |
| NNitrosteel | Pleasant Prairie | WI | — | ◐ LIKELY ACTIVE |
| NDNoco Distributing | Youngwood | PA | — | ◐ LIKELY ACTIVE |
Norman Noble INC Micromachining Div 1 | Highland Heights | OH | — | ◐ LIKELY ACTIVE |
| NCNorris Cylinder | Longview | TX | — | ◐ LIKELY ACTIVE |
| NSNorris Sucker Rods / 4801 W 49th St Norris Sucker Rod Faclt | Tulsa | OK | — | ◐ LIKELY ACTIVE |
| NANorth American Galvanizing | Louisville | KY | — | ◐ LIKELY ACTIVE |
| NANorth American Galvanizing Company | Saint Louis | MO | — | ◐ LIKELY ACTIVE |
| NENorthern Engraving CORP | Spring Grove | MN | — | ◐ LIKELY ACTIVE |
| NENorthern Engraving CORP - Sparta | Sparta | WI | — | ◐ LIKELY ACTIVE |
| NFNorthern Foundry | Hibbing | MN | — | ▲ REPORTED CLOSED |
| NINorthern Iron LLC | Saint Paul | MN | — | ◐ LIKELY ACTIVE |
| NSNova Steel - New Facility | Bowling Green | KY | — | ◐ LIKELY ACTIVE |
| NFN&s Flamespray | Mannford | OK | — | ◐ LIKELY ACTIVE |
| NFNylok Fastener CORP | Lincolnwood | IL | — | ◐ LIKELY ACTIVE |
| OAOhio Anodizing INC | Columbus | OH | — | ◐ LIKELY ACTIVE |
| OSOil States Skagit Smatco LLC - Houma Manufacturing Facility | Houma | LA | — | ◐ LIKELY ACTIVE |
| OCOld Country Millwork INC | Los Angeles | CA | — | ◐ LIKELY ACTIVE |
| OPOmega Plating | Crestwood | IL | — | ◐ LIKELY ACTIVE |
| OIOmg INC | Agawam | MA | — | ◐ LIKELY ACTIVE |
| OSO'neal Steel INC | Greensboro | NC | — | ◐ LIKELY ACTIVE |
| OSOneal Steel INC | Ambridge | PA | — | ◐ LIKELY ACTIVE |
| OCOnesource Coil Coaters | Clearwater | FL | — | ◐ LIKELY ACTIVE |
| OIOsco Industries, INC. New Boston Divisi (0773010180) | New Boston | OH | — | ◐ LIKELY ACTIVE |
| OCOshkosh Corporation - Defense Plant | Oshkosh | WI | — | ◐ LIKELY ACTIVE |