Malta Ready Mix Incorporated | Malta | — | ● ACTIVE |
Treasure State Concrete INC | Polson | — | ● ACTIVE |
Montana Terrazzo CO. | Billings | — | ● ACTIVE |
Neodymia INC | Missoula | — | ● ACTIVE |
Silver City Stone LLC | Helena | — | ● ACTIVE |
| AGAsh Grove Cement CO - Montana City Plant | Clancy | — | ◐ LIKELY ACTIVE |
| TTrident | Three Forks | — | ◐ LIKELY ACTIVE |
| GWGraymont Western Lime Plant | Townsend | — | ◇ UNVERIFIED |
| BMBarretts Minerals INC. Mill Site | Dillon | — | ◐ LIKELY ACTIVE |
| GSGlacier Stone Supply - Kalispell Processing Plant | Kalispell | — | ◐ LIKELY ACTIVE |
| HSHelena Sand & Gravel, INC | Helena | 100–499 | ◐ LIKELY ACTIVE |
| HRHiline Redi-mix LLC | Shelby | — | ◐ LIKELY ACTIVE |
| KPKanta Products | Three Forks | 1–19 | ◐ LIKELY ACTIVE |
| RSRbc Sand & Gravel INC. | Darby | — | ◐ LIKELY ACTIVE |
| CCCretex Concrete Products - Montana City | Montana City | — | ◇ UNVERIFIED |
| FCForterra Concrete Products - Billings | Billings | — | ◇ UNVERIFIED |
| FCForterra Concrete Products - Helena | Helena | — | ◇ UNVERIFIED |
| HSHelena Sand & Gravel Dba Montana Materials & Const | Anaconda | — | ◇ UNVERIFIED |
| KRKnoll's Ready Mix | Glendive | — | ◇ UNVERIFIED |
| QMQuikrete - Montana Plant | Billings | — | ◇ UNVERIFIED |
| BPBasin Precast, Inc. | Sidney | 20–99 | ◐ LIKELY ACTIVE |
| BBilcp | Billings | 20–99 | ◐ LIKELY ACTIVE |
| BQBIL Quikrete | Billings | 1–19 | ◐ LIKELY ACTIVE |
| CCCasino Creek Concrete INC | Lewistown | — | ◐ LIKELY ACTIVE |
| CMConcrete Materials of Montana | Belgrade | 20–99 | ◐ LIKELY ACTIVE |
| DBDonaldson Bros. Ready Mix, Inc. | Hamilton | 20–99 | ◐ LIKELY ACTIVE |
| FFsg-montana | Billings | 20–99 | ◐ LIKELY ACTIVE |
| GUGarnet USA LLC | Alder | — | ◐ LIKELY ACTIVE |
| HHlncp | Helena | 1–19 | ◐ LIKELY ACTIVE |
| HCH-m Concrete LLC | Frenchtown | — | ◐ LIKELY ACTIVE |
| MRMontana Rockworks | Kalispelll | 20–99 | ◐ LIKELY ACTIVE |
| WPWolf Point Sand & Gravel, LLC. | Wolf Point | — | ◐ LIKELY ACTIVE |
| DMDiversified Materials & Construction, LLC | Missoula | — | ◐ LIKELY ACTIVE |
| 1E12 E's Yard Enhancement Service LLC | Anaconda | — | ◇ UNVERIFIED |
| BCB C Concrete | Missoula | — | ◇ UNVERIFIED |
| EAEJ and K Holdings LLC | Kalispell | — | ◇ UNVERIFIED |
| GWGraymont Western U.s. INC. Indian Creek | Townsend | — | ◇ UNVERIFIED |
| JGJtl Group INC. | Belgrade | — | ◇ UNVERIFIED |
| KSK2 Stone (montana) LLC | Kalispell | — | ◇ UNVERIFIED |
| MCMarsich Crane, INC | Billings | — | ◇ UNVERIFIED |
| MLMineralholics, LLC | Polson | — | ◇ UNVERIFIED |
| MVMission Valley Concrete | Pablo | — | ◇ UNVERIFIED |
| MRMissoula Ready Mix | Missoula | — | ◇ UNVERIFIED |
| PAP & A Properties LLC | Helena | — | ◇ UNVERIFIED |
| PCPioneer Concrete & Fuel INC | Butte | — | ◇ UNVERIFIED |
| PRPolson Ready Mix | Polson | — | ◇ UNVERIFIED |
| PMPrecast Mockel & Excavation, CO. | Helena | — | ◇ UNVERIFIED |
| RLR. L. Schaff Concrete Construction, INC. | Shepherd | — | ◇ UNVERIFIED |
| SAS and N Concrete | Anaconda | — | ◇ UNVERIFIED |
| TFThe Fagenstrom CO | Great Falls | — | ◇ UNVERIFIED |