| MLMartin Lumber 18 #1 & Swd | Union Hill | LA | — | ◇ UNVERIFIED |
| MSMarubenl Specialty Chemicals | Vandalia | IL | — | ◇ UNVERIFIED |
| MBMaster Builders Solutions US at Palmer Logistics | Grand Prairie | TX | — | ◇ UNVERIFIED |
| MBMaster Builders Solutions US LLC | Allentown | PA | — | ◇ UNVERIFIED |
| MMMaster Made Paints Incorporated | Carl Junction | MO | — | ◇ UNVERIFIED |
| MPMaster Paints & Chemicals CORP | Guayanilla | PR | — | ◇ UNVERIFIED |
| MWMaster Wall INC. | Lithonia | GA | — | ◇ UNVERIFIED |
| MWMaster Wash | Commerce City | CO | — | ◇ UNVERIFIED |
| MPMatthews Paint CO | Pleasant Prairie | WI | — | ◇ UNVERIFIED |
| MIMaxxum INC | Rush | MN | — | ◇ UNVERIFIED |
| MIMayco International | Clinton Township | MI | — | ◇ UNVERIFIED |
| MIMcalpin Industries INC | Macedon | NY | — | ◇ UNVERIFIED |
| MPMccormick Paint Works Company | Rockville | MD | — | ◇ UNVERIFIED |
| MIMc Ionic Solutions Us, INC | Memphis | TN | — | ◇ UNVERIFIED |
| MRMckees Rocks Transfer Station | Mc Kees Rocks | PA | — | ◇ UNVERIFIED |
| MEMedtronic Energy & Component Center | Minneapolis | MN | — | ◇ UNVERIFIED |
| MIMenard INC Fleet North | Eau Claire | WI | — | ◇ UNVERIFIED |
| MFMetal Finishing Research CORP | Chicago | IL | — | ◇ UNVERIFIED |
| MCMetokote Corporation | Sanford | NC | — | ◇ UNVERIFIED |
| MPMiami Products & Chemical CO. | Dayton | OH | — | ◇ UNVERIFIED |
 Michelman, INC. | Sharonville | OH | — | ◇ UNVERIFIED |
| MCMichigan Coating Products INC | Wyoming | MI | — | ◇ UNVERIFIED |
| MIMichigan Industrial Finishes | Hamtramck | MI | — | ◇ UNVERIFIED |
| MCMichlin Chemical CORP | Detroit | MI | — | ◇ UNVERIFIED |
| MFMicronized Fluoropolymer Products INC. | Delray Beach | FL | — | ◇ UNVERIFIED |
| MAMid America Coatings | Addison | IL | — | ◇ UNVERIFIED |
| MAMid America Protective Coatings | Franklin Park | IL | — | ◇ UNVERIFIED |
| MAMid America Protective Coatings INC | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| MIMid-states Intl Motocross INC | Amherst | OH | — | ◇ UNVERIFIED |
| MPMid-states Paint & Chem CO | Saint Louis | MO | — | ◇ UNVERIFIED |
| MCMidwest Composites, LLC | Wapakoneta | OH | — | ◇ UNVERIFIED |
| MCMilliken Chemical Keystone Plant- Milli | Inman | SC | — | ◇ UNVERIFIED |
| MMMilspray Military Technologies | Lakewood | NJ | — | ◇ UNVERIFIED |
| MRMineral Right, INC. Environmental Manager | Phillipsburg | KS | — | ◇ UNVERIFIED |
| MIMinuteman International Multi-clean Div | Shoreview | MN | — | ◇ UNVERIFIED |
| MLMira Loma Peaker Generating Station | Ontario | CA | — | ◇ UNVERIFIED |
| MPMirandy Products LLC | South Hempstead | NY | — | ◇ UNVERIFIED |
| MEMissouri Electrochem Incorporated | Saint Louis | MO | — | ◇ UNVERIFIED |
| MPMissouri Paint & Varnish | Saint Louis | MO | — | ◇ UNVERIFIED |
| MCMitsubishi Chemical Performance Polymers INC | Warren | MI | — | ◇ UNVERIFIED |
| MCMobil Chemical Company | Santa Ana | CA | — | ◇ UNVERIFIED |
| MCMocom Compounds Corporation | Duncan | SC | — | ◇ UNVERIFIED |
| MCModineer Company | Benton Harbor | MI | — | ◇ UNVERIFIED |
| MSModular Solid Surfaces, LLC | Lakeland | FL | — | ◇ UNVERIFIED |
| MSMomentive Specialty Chemicals INC Mt Jewett Facility | Mount Jewett | PA | — | ◇ UNVERIFIED |
| MCMonsanto CO | Kenilworth | NJ | — | ◇ UNVERIFIED |
| MCMonson Chemical Distribution | Leominster | MA | — | ◇ UNVERIFIED |
| MLMorris Lister Avenue Assn | Newark | NJ | — | ◇ UNVERIFIED |
| MIMorton International | Grand Saline | TX | — | ◇ UNVERIFIED |
| MMMountain Marble Manufacturing INC | Prescott Valley | AZ | — | ◇ UNVERIFIED |
