| MCMaschmeyer Concrete Company of Florida | West Palm Beach | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Company of Florida | Deltona | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete CO of Florida INC | Davenport | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete CO of Florida INC | Casselberry | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete-deltona Concrete Batch Plant | Deltona | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete-st Cloud | Saint Cloud | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Taft Facility | Orlando | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete - Winter Beach | Winter Beach | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-lakeland Rm | Lakeland | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-loughman Rm | Davenport | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-melbourne Rm | Melbourne | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-onsite-universal Rm | Orlando | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-sligh Rm | Tampa | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer-st. Cloud Rm | Saint Cloud | FL | — | ◇ UNVERIFIED |
| MMaschmeyer-vero(blk-rm) | Vero Beach | FL | — | ◇ UNVERIFIED |
| MDMasco Dba Knife River 00386 | Portable | ID | — | ◇ UNVERIFIED |
| MRMassey Ready-mix Concrete, INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| MCMaster Concrete Plant 5 | San Juan | PR | — | ◇ UNVERIFIED |
| MMMaterial Management - American Concrete | Arkansas City | KS | — | ◇ UNVERIFIED |
| MMMaterial Management - Daniels Ready Mix | Winfield | KS | — | ◇ UNVERIFIED |
| MPMaterials Packaging CORP | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MCMathias Concrete INC | Monte Vista | CO | — | ◇ UNVERIFIED |
| MCMathias Concrete - South Fork | South Fork | CO | — | ◇ UNVERIFIED |
| MRMayo Ready Mix Concrete Sr 51 | Mayo | FL | — | ◇ UNVERIFIED |
| MHMccarthy Henderson Concrete Batch Plant | Henderson | NC | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Co.(epd-wcd) | Vienna | GA | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Company | Atlanta | GA | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Concrete Batch Plant | Rome | GA | — | ◇ UNVERIFIED |
| MCMcclure Concrete Company INC - Lebanon | Lebanon | VA | — | ◇ UNVERIFIED |
| MCMccoig Concrete-springwells | Detroit | MI | — | ◇ UNVERIFIED |
| MCMccreary County Ready Mix | Whitley City | KY | — | ◇ UNVERIFIED |
| MCMcdowell Concrete Supply, LLC | Marion | NC | — | ◇ UNVERIFIED |
| MBMcgee Brothers Company Incorporated | Midland | NC | — | ◇ UNVERIFIED |
| MMMc Materials 62 - Mountain View | Mountain View | MO | — | ◇ UNVERIFIED |
| MMMc Materials Plant 63 - Summersville | Summersville | MO | — | ◇ UNVERIFIED |
| MMMc Materials Plant 64 - Winona | Winona | MO | — | ◇ UNVERIFIED |
| MCMcminnville Concrete | Mcminnville | OR | — | ◇ UNVERIFIED |
| MCMcpherson Concrete | Mcpherson | KS | — | ◇ UNVERIFIED |
 Meadow Burke, LLC. | Tampa | FL | — | ◇ UNVERIFIED |
| MRMeadville Redi Mix I/rt 322 | Meadville | PA | — | ◇ UNVERIFIED |
| MCMechanicsville Concrete Llc-airport Plant (portugee Road) | Sandston | VA | — | ◇ UNVERIFIED |
| MSMedina Supply North Ridgeville Plant 500 | North Ridgeville | OH | — | ◇ UNVERIFIED |
| MSMeeker Sand & Gravel INC | Meeker | CO | — | ◇ UNVERIFIED |
| MPMelissa Plant | Melissa | TX | — | ◇ UNVERIFIED |
| MRMemphis Ready Mix Malone Road Plant Dba Buzzi Unicem Ready Mix, LLC | Memphis | TN | — | ◇ UNVERIFIED |
| MVMercer Vault Company | Fredericksburg | VA | — | ◇ UNVERIFIED |
| MGMertel Gravel CO | Peru | IL | — | ◇ UNVERIFIED |
| MMetalico-evans | Atlanta | GA | — | ◇ UNVERIFIED |
| MCMetro Concrete LLC | Biloxi | MS | — | ◇ UNVERIFIED |
| MIMetrocon INC | Central | SC | — | ◇ 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. - Malone Road | Memphis | TN | — | ◇ UNVERIFIED |
| MMMetro Materials (valley Park Plant)-fenton Supply Company | Valley Park | MO | — | ◇ UNVERIFIED |
| MMMetro Mix LLC | Denver | CO | — | ◇ UNVERIFIED |
| MCMetromont Corporation | Charlotte | NC | — | ◇ UNVERIFIED |
| MLMetromont LLC - Richmond Plant | Richmond | VA | — | ◇ UNVERIFIED |
| MMMetromont Materials | Charlotte | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation | Marion | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation Belton | Anderson | SC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Concord Plt | Concord | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Indian Trail Plant | Indian Trail | NC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation Richburg | Richburg | SC | — | ◇ UNVERIFIED |
| MPMetromont Prestress Company | Charlotte | NC | — | ◇ UNVERIFIED |
| MRMetro Ready Mix Concrete, INC. | Nashville | TN | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply INC - Hopkinsville Plant | Hopkinsville | KY | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Belvidere | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Marengo | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Northbrook | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Huntley | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Harvard | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Mchenry | IL | — | ◇ UNVERIFIED |
| MMMeyer Material CO Kenosha 20 | Kenosha | WI | — | ◇ UNVERIFIED |
| MMMeyer Material CO Kenosha 40 | Kenosha | WI | — | ◇ UNVERIFIED |
| MMMeyer Material CO Middlebury Ready Mix Plant | Middlebury | IN | — | ◇ UNVERIFIED |
| MMMeyer Material Company | Milwaukee | WI | — | ◇ UNVERIFIED |
| MMMeyer Material CO Warsaw Ready Mix Plant | Warsaw | IN | — | ◇ UNVERIFIED |
| MAMid America Redi Mix - Hutchinson Plant | South Hutchinson | KS | — | ◇ UNVERIFIED |
| MHMid Hudson Concrete | Cold Spring | NY | — | ◇ UNVERIFIED |
| MIMid Il Concrete INC Dba Clark County Ready Mix | Martinsville | IL | — | ◇ UNVERIFIED |
| MIMid Illinois Concrete - Effingham Ready Mix | Effingham | IL | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Effingham | IL | — | ◇ UNVERIFIED |
| MSMidland South Plant | Midland | TX | — | ◇ UNVERIFIED |
| MPMidlothian Plant | Midlothian | TX | — | ◇ UNVERIFIED |
| MMMid-way Materials, INC. | Mckenzie | TN | — | ◇ UNVERIFIED |
| MCMidwest Concrete - Abilene #2 (swpp) | Abilene | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete - Charlson Road (swpp) | Manhattan | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete-junction City Ready Mix (swpp) | Junction City | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete Materials - Forbes Field Concrete Plant (water) | Topeka | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete Materials - Manhattan | Manhattan | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete Materials - New Strawn Ready Mix Plant (water) | New Strawn | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete - Perry (swpp) | Perry | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete - Plant #11-man Rm (portable)(air) | Portable | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete -plant #8-airport Rm (portable)(air) | Portable | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete - Wamego | Wamego | KS | — | ◇ UNVERIFIED |
| MMMidwest Minerals (master Equip List)(air) | Pittsburg | KS | — | ◇ UNVERIFIED |
| MPMidwest Products-clay Center (new) | Clay Center | KS | — | ◇ UNVERIFIED |
| MRMidwest Ready Mix | Vermillion | SD | — | ◇ UNVERIFIED |
