| LSLuck Stone - South Richmond Plant | Richmond | VA | — | ◐ LIKELY ACTIVE |
| LBLydel Brookhaven Asphalt Facility | Brookhaven | NY | — | ◐ LIKELY ACTIVE |
| MCMac Construction & Excavating INC | Jeffersonville | IN | — | ◐ LIKELY ACTIVE |
| MDMackenzie-chamberlin Dr-ingham | Lansing | MI | — | ◐ LIKELY ACTIVE |
| MCMagnolia Cbp | Magnolia | TX | — | ◐ LIKELY ACTIVE |
| MCMago Construction Shop | Bardstown | KY | — | ◐ LIKELY ACTIVE |
| MRMainline Ready Mix | Fort Myers | FL | — | ◐ LIKELY ACTIVE |
| MQMalone Quarry | North Bangor | NY | — | ◐ LIKELY ACTIVE |
| MIManatts INC | Ankeny | IA | — | ◐ LIKELY ACTIVE |
| MCMarion County Asphalt Plant | Guin | AL | — | ◐ LIKELY ACTIVE |
| MSMarjan Stone | Spring Valley | CA | — | ◐ LIKELY ACTIVE |
| MCMarshall Concrete | Christiansburg | VA | — | ◐ LIKELY ACTIVE |
| MZMar Zane Materials, INC. Unit 2 | Marengo | OH | — | ◐ LIKELY ACTIVE |
| MZMar Zane Plant No 3 | Gnadenhutten | OH | — | ◐ LIKELY ACTIVE |
| MCMaschmeyer Concrete - Okeechobee Plant | Okeechobee | FL | — | ◐ LIKELY ACTIVE |
| MIMasco INC 00051 | Portable | ID | — | ◐ LIKELY ACTIVE |
| MMMatco - Manistee | Manistee | MI | — | ◐ LIKELY ACTIVE |
| MCMathy Construction CO Plant 52 | Wakefield | MI | — | ◐ LIKELY ACTIVE |
| MCMathy Construction CO Plant 67 | Ironwood | MI | — | ◐ LIKELY ACTIVE |
| MCMathy Construction Plant #43 | Ironwood | MI | — | ◐ LIKELY ACTIVE |
| MCMatthews C W Contracting CO INC Plt 59 | Lagrange | GA | — | ◐ LIKELY ACTIVE |
| MCMayo Construction Company, INC. | Cavalier | ND | — | ◐ LIKELY ACTIVE |
| MMMaysville Materials CO | Maysville | KY | — | ◐ LIKELY ACTIVE |
| MAMecklenburg Asphalt Plant | South Hill | VA | — | ◐ LIKELY ACTIVE |
| MPMetro Products & Const-robeson | Lumberton | NC | — | ◐ LIKELY ACTIVE |
| MRMetro Ready Mix | Prince George | VA | — | ◐ LIKELY ACTIVE |
| MCMetzger Construction CO INC | Boonville | IN | — | ◐ LIKELY ACTIVE |
| MCMeuth Concrete - Cadiz Plant | Cadiz | KY | — | ◐ LIKELY ACTIVE |
| MCMeuth Construction Supply | Madisonville | KY | — | ◐ LIKELY ACTIVE |
| MMMeyer Material | Mchenry | IL | — | ◐ LIKELY ACTIVE |
| MBMichels Batch Plant - Berthold | Berthold | ND | — | ◐ LIKELY ACTIVE |
| MRMichel's Road & Stone INC | Brownsville | MN | — | ◐ LIKELY ACTIVE |
| MAMichigan Asphalt Terminal CO | Manistee | MI | — | ◐ LIKELY ACTIVE |
| MPMid-ohio Paving, INC. (0142000407) | Centerburg | OH | — | ◐ LIKELY ACTIVE |
| MBMidwest Block & Brick-kansas City Plant | Kansas City | MO | — | ◐ LIKELY ACTIVE |
| MCMidwest Concrete Materials - Lawrence (e 23rd)(air) | Lawrence | KS | — | ◐ LIKELY ACTIVE |
| MCMidwest Concrete Materials - Plant #36 (air) | Ottawa | KS | — | ◐ LIKELY ACTIVE |
| MPMidwest Products - Hanover Plant | Hanover | KS | — | ◐ LIKELY ACTIVE |
| MPMidwest Products - Washington Plant | Washington | KS | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors Limited Partnership | Bloomfield | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors Limited Partnership | Columbus | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors LP | Lafayette | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors LP | Plainfield | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors LP | Daleville | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors LP | Veedersburg | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors, L.p. | Cambridge City | IN | — | ◐ LIKELY ACTIVE |
| MCMilestone Contractors, L.p. | New Haven | IN | — | ◐ LIKELY ACTIVE |
| MRMintek Resources Incorporated | Indianapolis | IN | — | ◐ LIKELY ACTIVE |
| MRMission Ready Mix - Goleta | Goleta | CA | — | ◐ LIKELY ACTIVE |
| MMMmc Materials Inc, Amory | Amory | MS | — | ◐ LIKELY ACTIVE |