| MMMetro Materials - Hanley Plant-kinloch | Kinloch | — | ◇ UNVERIFIED |
| MMMetro Materials (valley Park Plant)-fenton Supply Company | Valley Park | — | ◇ UNVERIFIED |
| MMMiller Material CO | Kansas City | — | ◇ UNVERIFIED |
| MBMillstone Bangert Inc-chesterfield (mbi #6) | Chesterfield | — | ◇ UNVERIFIED |
 Mississippi Lime Company - Bonne Terre | Bonne Terre | — | ◇ UNVERIFIED |
| MRMoberly Ready Mix Company Llc-moberly | Moberly | — | ◇ UNVERIFIED |
| MIMo-con Inc-mo-con INC | Fulton | — | ◇ UNVERIFIED |
| MCMoniteau County Ready Mix | California | — | ◇ UNVERIFIED |
| NRNational Refractories & Minerals CORP. | Wellsville | — | ◇ UNVERIFIED |
| NWN.b. West Contracting CO. Inc.-plant #5 | Bourbon | — | ◇ UNVERIFIED |
| NCNeosho Concrete Products Inc-neosho Concrete Products INC | Neosho | — | ◇ UNVERIFIED |
| NANorth American Refractories | Farber | — | ◇ UNVERIFIED |
| NRNorthland Ready Mix INC | Pleasant Valley | — | ◇ UNVERIFIED |
| NBNova Brik Midamerica Llc-sikeston | Sikeston | — | ◇ UNVERIFIED |
| OBOldcastle Buildingenvelope | Warrenton | — | ◇ UNVERIFIED |
| OGOldcastle Glass INC | Warrenton | — | ◇ UNVERIFIED |
| OWOlin Winchester, LLC - White Flyer | Webb City | — | ◇ UNVERIFIED |
| OCOsage County Industries Inc-linn | Linn | — | ◇ UNVERIFIED |
| OCOsceola Concrete LLC | Osceola | — | ◇ UNVERIFIED |
| OBOzark Building Materials, LLC Plant 1 | Saint Louis | — | ◇ UNVERIFIED |
| OROzark Ready Mix | Eldon | — | ◇ UNVERIFIED |
| OROzark Ready Mix Company INC. | Linn Creek | — | ◇ UNVERIFIED |
| OROzark Ready Mix Company, INC. | Lebanon | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Kansas City, Missouri | Kansas City | — | ◇ UNVERIFIED |
| OROzark Ready Mix - Osage Beach | Osage Beach | — | ◇ UNVERIFIED |
| OROzark Ready Mix - Show Me Ready Mix | Lake Lotawana | — | ◇ UNVERIFIED |
| PCPavestone - Cape Girardeau, Mo Plant | Scott City | — | ◇ UNVERIFIED |
| PLPavestone - Lee's Summit, Mo Plant | Lees Summit | — | ◇ UNVERIFIED |
| PCPayless Concrete-atchison St | Saint Joseph | — | ◇ UNVERIFIED |
| PCPenny's Concrete, INC. | Hamilton Mo | — | ◇ UNVERIFIED |
| PCPennys Concrete Incorporated | Randolph | — | ◇ UNVERIFIED |
| PCPenny's Concrete - Richmond | Richmond | — | ◇ UNVERIFIED |
| PPerformaglass | Fordland | — | ◇ UNVERIFIED |
| PCPierce Concrete | Stanberry | — | ◇ UNVERIFIED |
| PCPike County Concrete | Louisiana | — | ◇ UNVERIFIED |
| P6Plant 65 Ava | Ava | — | ◇ UNVERIFIED |
| PRPolitte Ready Mix - Van Buren | Van Buren | — | ◇ UNVERIFIED |
| PRPolitte Ready Mix-viburnum | Viburnum | — | ◇ UNVERIFIED |
| PRPolittle Ready Mix | Bonne Terre | — | ◇ UNVERIFIED |
| PGPremier Glass USA LLC | Park Hills | — | ◇ UNVERIFIED |
| PCProgressive Contractors, INC. | Poplar Bluff | — | ◇ UNVERIFIED |
| QKQuikrete - Kansas City 2 Plant | Kansas City | — | ◇ UNVERIFIED |
| RBRaineri Building Materials-raineri Building Materials | Saint Louis | — | ◇ UNVERIFIED |
| RMReady Mix Concrete Inc-ste Genevieve Plant | Ste. Genevieve | — | ◇ UNVERIFIED |
| RBRed Bird Pre-mix Company-bridgeton | Bridgeton | — | ◇ UNVERIFIED |
| RRRiley Ready Mix & Materials Inc-riley Ready Mix & Materials INC | Saint Louis | — | ◇ UNVERIFIED |
| RQRuprecht Quarry-paule Rd | Saint Louis | — | ◇ UNVERIFIED |
| SCSandidge Concrete - Jefferson City | Jefferson City | — | ◇ UNVERIFIED |
| SCScott's Concrete Camdenton | Camdenton | — | ◇ UNVERIFIED |
| SOSemo Operating Company | Advance | — | ◇ UNVERIFIED |
