| MRMattoon-charleston Ready Mix | Charleston | IL | — | ◇ UNVERIFIED |
| MSMatt Stone CO INC | Lexington | KY | — | ◇ UNVERIFIED |
| MWMatt Waite Excavation INC (dba Kelco Concrete) | Pawlet | VT | — | ◇ UNVERIFIED |
| MCMayan Concrete INC | Matteson | IL | — | ◇ UNVERIFIED |
| MCMay Concrete & Block Products CO INC | Allen City | KY | — | ◇ UNVERIFIED |
| MCMayson Concrete | Guyton | GA | — | ◇ UNVERIFIED |
| MCMbi Construction | Effingham | IL | — | ◇ UNVERIFIED |
| MCMbi Construction INC | Newton | IL | — | ◇ UNVERIFIED |
| MCMbi Construction INC | Mattoon | IL | — | ◇ UNVERIFIED |
| MCMbi Construction INC | Newton | IL | — | ◇ UNVERIFIED |
| MCMbi Constuction INC | Xenia | IL | — | ◇ UNVERIFIED |
| MRMbi Ready Mix Llc/hansen Bros | Colfax | CA | — | ◇ UNVERIFIED |
| MBMcalester Batch Plant | Mcalester | OK | — | ◇ UNVERIFIED |
| MHMccarthy Henderson Concrete Batch Plant | Henderson | NC | — | ◇ UNVERIFIED |
| MIMccarthy Improvement CO | East Moline | IL | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Co.(epd-wcd) | Vienna | GA | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Company | Hoover | AL | — | ◇ UNVERIFIED |
| MIMcc, INC. | Green Bay | WI | — | ◇ UNVERIFIED |
| MAMcclellan and Mcqueen INC | Riverton | WY | — | ◇ UNVERIFIED |
| MEMcconnell Exc | Quincy | IL | — | ◇ UNVERIFIED |
| MCMccreary County Ready Mix | Whitley City | KY | — | ◇ UNVERIFIED |
| MCMcdowell Concrete Supply, LLC | Marion | NC | — | ◇ UNVERIFIED |
| MBMcgee Brothers Company Incorporated | Midland | NC | — | ◇ UNVERIFIED |
 Mc Industries INC Dba Kynmar Concrete | Merced | CA | — | ◇ UNVERIFIED |
| MAMckinney Ave Plt | Houston | TX | — | ◇ UNVERIFIED |
| MCMclean County Concrete CO | Bloomington | IL | — | ◇ UNVERIFIED |
| MCMcMaster Concrete Products of Haines City, LLC (TDN Holdings, LLC | Haines City | FL | — | ◇ UNVERIFIED |
| MMMc Materials 62 - Mountain View | Mountain View | MO | — | ◇ UNVERIFIED |
| MRMeadville Redi-mix Concrete, INC. | Meadville | PA | — | ◇ UNVERIFIED |
| MRMeadville Redi Mix I/rt 322 | Meadville | PA | — | ◇ UNVERIFIED |
| MCMeba Contracting and Waste Services | Staten Island | NY | — | ◇ UNVERIFIED |
| MCMechanicsville Concrete LLC | Midlothian | VA | — | ◇ UNVERIFIED |
| MCMechanicsville Concrete Llc-airport Plant (portugee Road) | Sandston | VA | — | ◇ UNVERIFIED |
| MSMeeker Sand & Gravel INC | Meeker | CO | — | ◇ UNVERIFIED |
| MRMeiers Ready Mix, INC. | Topeka | KS | — | ◇ UNVERIFIED |
| MCMelissa Cbp | Mckinney | TX | — | ◇ UNVERIFIED |
| MPMelissa Plant a and B | Melissa | TX | — | ◇ UNVERIFIED |
| MCMenahga Concrete Products INC - Nonmetallic | Menahga | MN | — | ◇ UNVERIFIED |
| MDMenards Distribution Center | Mckenzie | ND | — | ◇ UNVERIFIED |
| MRMena Ready Mix | Mena | AR | — | ◇ UNVERIFIED |
| MBMeridian Brick Llc, Bessemer Plant No. 6, LLC | Bessemer | AL | — | ◇ UNVERIFIED |
| MUMerritt U-kart Concrete, INC. | Lincoln | NE | — | ◇ UNVERIFIED |
| MGMertel Gravel CO | Peru | IL | — | ◇ UNVERIFIED |
| MCMesquite Concrete Batch Plant | Balch Springs | TX | — | ◇ UNVERIFIED |
| MCMetro Concrete LLC | Lebanon | IL | — | ◇ UNVERIFIED |
| MCMetro Concrete LLC | Biloxi | MS | — | ◇ UNVERIFIED |
| MCMetro Concrete Products INC | South Roxana | IL | — | ◇ UNVERIFIED |
| MIMetrocon INC | Travelers Rest | SC | — | ◇ UNVERIFIED |
| MIMetrocon Inman Plant | Inman | SC | — | ◇ UNVERIFIED |
| MMMetro Materials Concrete Batch Plant | Valley Park | MO | — | ◇ UNVERIFIED |
| MMMetro Materials - Hanley Plant-kinloch | Kinloch | MO | — | ◇ UNVERIFIED |
| MMMetro Materials INC | Shiloh | IL | — | ◇ UNVERIFIED |
| MMMetro Materials Inc-chesterfield | Chesterfield | MO | — | ◇ UNVERIFIED |
| MMMetro Materials Inc-st Louis City | Saint Louis | MO | — | ◇ UNVERIFIED |
| MMMetro Materials (valley Park Plant)-fenton Supply Company | Valley Park | MO | — | ◇ UNVERIFIED |
| MMMetromont Materials | Charlotte | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials-catawba | Hickory | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation Belton | Anderson | SC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Concord Plt | Concord | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Monroe Plant | Monroe | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Limited Liability Company | North Wilkesboro | NC | — | ◇ UNVERIFIED |
| MMetromont:whitehorse | Greenville | SC | — | ◇ UNVERIFIED |
| MPMetro Pavers INC Portable | Loveland | CO | — | ◇ UNVERIFIED |
| MRMetropolis Ready Mix | Metropolis | IL | — | ◇ UNVERIFIED |
| MRMetro Ready Mix | Bakersfield | CA | — | ◇ UNVERIFIED |
| MRMetro Ready Mix | Prince George | VA | — | ◇ UNVERIFIED |
| MRMetro Ready Mix | Bakersfield | CA | — | ◇ UNVERIFIED |
| MRMetro Ready Mix Concrete INC. | Nashville | TN | — | ◇ UNVERIFIED |
| MRMetro Ready Mix Concrete, INC. | Nashville | TN | — | ◇ UNVERIFIED |
| MRMetro Ready Mix LLC | Lehi | UT | — | ◇ UNVERIFIED |
| MRMetro Ready Mix & Supply Castor Ave Fac | Philadelphia | PA | — | ◇ UNVERIFIED |
| MCMeuth Concrete - Cadiz Plant | Cadiz | KY | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply | Henderson | KY | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply | Madisonville | KY | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply - Eddyville Plant | Eddyville | KY | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply INC - Morganfield | Morganfield | KY | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply – Owensboro Plant | Owensboro | KY | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply - Sebree Plant | Sebree | KY | — | ◇ UNVERIFIED |
| MRMexia Ready Mix | Mexia | TX | — | ◇ UNVERIFIED |
| MMMeyer Material | Mchenry | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Park City | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Bannockburn | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Saint Charles | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Crystal Lake | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Belvidere | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Northbrook | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Mchenry | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Channahon | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Lake Zurich | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Marengo | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Huntley | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Loves Park | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Harvard | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO #24 | Lee | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO - Elgin Yard 41 | Elgin | IL | — | ◇ UNVERIFIED |
| MMMeyer Materials CO | Machesney Park | IL | — | ◇ UNVERIFIED |
 Meyer Utility Structures LLC | Fort Pierce | FL | — | ◇ UNVERIFIED |
| MBMichels Batch Plant - Berthold | Berthold | ND | — | ◇ UNVERIFIED |
| MBMichels Batch Plant - Grandin | Grandin | ND | — | ◇ UNVERIFIED |
| MAMid Atlantic Terminals Shutdown | Chesapeake | VA | — | ◇ UNVERIFIED |
