| MIMark I Molded Plastics of Tennessee | Henry | TN | — | ◇ UNVERIFIED |
| MRMark Richey Woodworking & Design INC | Newburyport | MA | — | ◇ UNVERIFIED |
| MIMarlock INC | Maynardville | TN | — | ◇ UNVERIFIED |
| MGMarsha Grubb | Shelbyville | IL | — | ◇ UNVERIFIED |
| MMartinizing | Palatine | IL | — | ◇ UNVERIFIED |
| MMMartin Marietta Composites INC Sparta Facility | Sparta | NC | — | ◇ UNVERIFIED |
| MKMary Kay Abts | Pekin | IL | — | ◇ UNVERIFIED |
| MPMaryland Plastics | Federalsburg | MD | — | ◇ UNVERIFIED |
| MRMasco Retail Cabinet Group | Waverly | OH | — | ◇ UNVERIFIED |
| MCMason Candlelight | Middlesex | NJ | — | ◇ UNVERIFIED |
| MMMason Mfg INC | Decatur | IL | — | ◇ UNVERIFIED |
| MEMassac Environmental Tech INC | Centralia | IL | — | ◇ UNVERIFIED |
| MCMassasoit Community College | Canton | MA | — | ◇ UNVERIFIED |
| MHMassdot Highway Division | Boston | MA | — | ◇ UNVERIFIED |
| MPMastercraft Pattern and Model Works INC / Fiberglass Reinforced Plastic Mfg Faci | North Miami | OK | — | ◇ UNVERIFIED |
| MIMasterfab INC | Goshen | IN | — | ◇ UNVERIFIED |
| MMMaster Molded Products | Elgin | IL | — | ◇ UNVERIFIED |
| MPMaterial Processing and Handling CO | Fostoria | OH | — | ◇ UNVERIFIED |
| MEMathis Excavating | Du Quoin | IL | — | ◇ UNVERIFIED |
| MPMato Plastics INC. | Valencia | CA | — | ◇ UNVERIFIED |
| MLMatt Leigh | Pontiac | IL | — | ◇ UNVERIFIED |
| MPMauser Packaging Solutions | Charlotte | NC | — | ◇ UNVERIFIED |
| MMMayfair Molded Products CORP | Schiller Park | IL | — | ◇ UNVERIFIED |
| MBMccann Barrel | Milwaukee | WI | — | ◇ UNVERIFIED |
| MPMcclarin Plastics LLC | Hanover | PA | — | ◇ UNVERIFIED |
| MPMchenry Public Works Garage | Mchenry | IL | — | ◇ UNVERIFIED |
| MIMeadowvale INC | Sandwich | IL | — | ◇ UNVERIFIED |
| MCMeadwestvaco Calmar INC. | Winfield | KS | — | ◇ UNVERIFIED |
 Medegen Medical Products, LLC | Northglenn | CO | — | ◇ UNVERIFIED |
| MIMedline INC. | Mundelein | IL | — | ◇ UNVERIFIED |
| MFMedora Fs, INC. | Medora | IL | — | ◇ UNVERIFIED |
| MLMedranos Landscape INC | Rockford | IL | — | ◇ UNVERIFIED |
| MTMeioco Terminal | Ashkum | IL | — | ◇ UNVERIFIED |
| MCMelsur CORP | Westminster | VT | — | ◇ UNVERIFIED |
| MCMerck & Co, LLC | Boulder | CO | — | ◇ UNVERIFIED |
| MPMercury Plastics, INC. | City of Industry | CA | — | ◇ UNVERIFIED |
| MAMeridian Automotive | Jackson | OH | — | ◇ UNVERIFIED |
| MAMeridian Automotive Systems | Shelbyville | IN | — | ◇ UNVERIFIED |
| MAMeridian Automotive Systems INC | Canandaigua | NY | — | ◇ UNVERIFIED |
| MHMeritor - Howell | Howell | MI | — | ◇ UNVERIFIED |
| MIMerkle-korff Industries- Plant 3 | Des Plaines | IL | — | ◇ UNVERIFIED |
| MAMerryman Aggregates | Harvard | IL | — | ◇ UNVERIFIED |
| MAMerryman Aggregates LLC | Woodstock | IL | — | ◇ UNVERIFIED |
| MEMerryman Excavation INC | Woodstock | IL | — | ◇ UNVERIFIED |
| MIMetaglo INC. | Mamaroneck | NY | — | ◇ UNVERIFIED |
| MMMetal Management Midwest INC | Bedford Park | IL | — | ◇ UNVERIFIED |
| MTMetrolink Transit | Rock Island | IL | — | ◇ UNVERIFIED |
| MAMetropolis Airport | Metropolis | IL | — | ◇ UNVERIFIED |
| MPMetropolitan Pier & Exposition Authority | Chicago | IL | — | ◇ UNVERIFIED |
| MMMeyer Materials CO | Crystal Lake | IL | — | ◇ UNVERIFIED |
| MGMfg Galileo Composites | Sparks | NV | — | ◇ UNVERIFIED |
| MMgs | Germantown | WI | — | ◇ UNVERIFIED |
| MUMicrodyn-nadir US INC | Goleta | CA | — | ◇ UNVERIFIED |
| MPMicro Plastics, INC. | Melbourne | AR | — | ◇ UNVERIFIED |
| MAMicrotron Abrasives, INC. | Pineville | NC | — | ◇ UNVERIFIED |
| MAMid America Sand & Gravel CO | Mahomet | IL | — | ◇ UNVERIFIED |
| MAMid America Sand & Gravel CO | Champaign | IL | — | ◇ UNVERIFIED |
| MSMid-america Steel Drum CO INC | Saint Francis | WI | — | ◇ UNVERIFIED |
| MRMiddleboro Recycling | Middleborough | MA | — | ◇ UNVERIFIED |
| MAMidway Airport Amc Buildings | Chicago | IL | — | ◇ UNVERIFIED |
| MCMidwest Cement Products | Woosung | IL | — | ◇ UNVERIFIED |
| MCMidwest Container Reconditioning Mcr | Fulton | MO | — | ◇ UNVERIFIED |
| MEMidwest Electronic | Ellsworth | IL | — | ◇ UNVERIFIED |
| MMMidwest Molding, INC. | Wolcottville | IN | — | ◇ UNVERIFIED |
| MPMidwest Plastic CO | Cherryvale | KS | — | ◇ UNVERIFIED |
| MRMidwest Rem Enterprises INC | Chicago | IL | — | ◇ UNVERIFIED |
| MSMidwest Sanitary Service INC | Wood River | IL | — | ◇ UNVERIFIED |
| MSMidwest Soil Remediation | Lockport | IL | — | ◇ UNVERIFIED |
| MTMidwest Tank Services INC | Bolivar | OH | — | ◇ UNVERIFIED |
| MFMike Fuhrman, Village President | Waynesville | IL | — | ◇ UNVERIFIED |
| MGMikron G Building | Kent | WA | — | ◇ UNVERIFIED |
| MMMikron Midwest | Winnebago | IL | — | ◇ UNVERIFIED |
| MRMilam Recycling & Disposal | East Saint Louis | IL | — | ◇ UNVERIFIED |
| MWMilgard Woodclad Division | Tacoma | WA | — | ◇ UNVERIFIED |
| MMMinee Monesse Golf Course | Momence | IL | — | ◇ UNVERIFIED |
| MWMineral Wells Facility | Mineral Wells | TX | — | ◇ UNVERIFIED |
 Mini Systems Incorporated | Plainville | MA | — | ◇ UNVERIFIED |
| MVMinton Ventures, LLC | Lenoir | NC | — | ◇ UNVERIFIED |
| MMMissouri Meerschaum Company | Washington | MO | — | ◇ UNVERIFIED |
| MCMitsubishi Chemical Advanced Materials | Wytheville | VA | — | ◇ UNVERIFIED |
| MWMi Windows & Doors LLC -gratz Facility | Gratz | PA | — | ◇ UNVERIFIED |
| MLMixonsite LLC | Chicago | IL | — | ◇ UNVERIFIED |
| MAMizzonis Auto Body INC. | Lodi | NJ | — | ◇ UNVERIFIED |
| MLM & L Oil CO INC | Cisne | IL | — | ◇ UNVERIFIED |
| MDModern Dispersion | Leominster | MA | — | ◇ UNVERIFIED |
| MPModern Plastics | Benton Harbor | MI | — | ◇ UNVERIFIED |
| MIMoistureshield, INC. | Lowell | AR | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass Companies | Aberdeen | SD | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass Companies | Aberdeen | SD | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass Companies, Plant 1 | Ashtabula | OH | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass - Holly Rd | Adelanto | CA | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass Northwest Site | Stevenson | WA | — | ◇ UNVERIFIED |
| MPMonarch Plastic INC (0285010268) | Orrville | OH | — | ◇ UNVERIFIED |
| MHMontec Hydraulics/carmichaels | Carmichaels | PA | — | ◇ UNVERIFIED |
| MPMoore Painting CO | Alton | IL | — | ◇ UNVERIFIED |
| MTMoorestown Twp Water Pollution Control Plant | Moorestown | NJ | — | ◇ UNVERIFIED |
| MSMorining Star Manufacturing INC | Crump | TN | — | ◇ UNVERIFIED |
| MCMorris Community Landfill | Morris | IL | — | ◇ UNVERIFIED |
| MGMorrison Grease Recycling INC | Morrison | IL | — | ◇ UNVERIFIED |
| MIMorton International | Woburn | MA | — | ◇ UNVERIFIED |
