| LRLoveland Ready Mix Concrete INC | Loveland | — | ◐ LIKELY ACTIVE |
| MSMountain State Stone | Denver | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group - Anderson Rmc | Delta | — | ◐ LIKELY ACTIVE |
| OSOldcastle Sw Group - Rifle Rmc Plant | Rifle | — | ◐ LIKELY ACTIVE |
| OUOldcastle United Comp of Mesa County | Rifle | — | ◐ LIKELY ACTIVE |
| OGOwens-brockway Glass - Windsor #28 | Windsor | — | ◐ LIKELY ACTIVE |
| OBOwens Brothers Concrete CO | Arvada | — | ◐ LIKELY ACTIVE |
| OIOwens-Illinois, Inc | Windsor | 100–499 | ◐ LIKELY ACTIVE |
| PPPeaks Precast LLC | Buena Vista | — | ◐ LIKELY ACTIVE |
| PHPinnacle Hardwood, INC | Denver | — | ◐ LIKELY ACTIVE |
| QBQuikrete-concrete Bagging Plant | Denver | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete CO - Plant 1 | Denver | — | ◐ LIKELY ACTIVE |
| RCRocla Concrete Tie Inc-Pueblo | Pueblo | 20–99 | ◐ LIKELY ACTIVE |
| RBRw Busse Excavating | Grand Lake | — | ◐ LIKELY ACTIVE |
| SISandco INC | Durango | — | ◐ LIKELY ACTIVE |
| SMSmith's Materials - Concrete Batch Plant | Dolores 2.3 Mi. Sw of | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Arvada Mix Plant | Arvada Area | — | ◐ LIKELY ACTIVE |
| SRSouthwest Readymix | Alamosa | — | ◐ LIKELY ACTIVE |
| SCStone City, LLC | Aurora | — | ◐ LIKELY ACTIVE |
| SCStone Concepts of Colorado, INC | Eagle | — | ◐ LIKELY ACTIVE |
| SMStone Mountain Design | Greeley | — | ◐ LIKELY ACTIVE |
| SVSt Vrain Block CO INC | Dacono | — | ◐ LIKELY ACTIVE |
| SCSundown Clay Company LLC | Grand Junction | — | ◐ LIKELY ACTIVE |
| TCThe Concrete Company, LLC | Parker | — | ◐ LIKELY ACTIVE |
| TSThe Stone Shop, INC. | Northglenn | — | ◐ LIKELY ACTIVE |
| TITops! in Granite INC. | Colorado Springs | — | ◐ LIKELY ACTIVE |
| TTTynt Technologies INC | Boulder | — | ◐ LIKELY ACTIVE |
| VCVillalobos Concrete- Port Concrete Plant | Castle Rock | — | ◐ LIKELY ACTIVE |
| VPVillalobos - Portable Concrete Plant | Commerce City | — | ◐ LIKELY ACTIVE |
| WAWestern Aggregates Incorporated (txi) | Boulder | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries Wcr INC Cs-east Ready Mix Plant | Colorado Springs | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries Wcr INC Firestone Ready Mix Plant | Longmont | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries Wcr INC Franktown Ready Mix Plant | Franktown | — | ◐ LIKELY ACTIVE |
| AGAnimas Glacier Gravel | Durango | — | ◐ LIKELY ACTIVE |
| ASAsphalt Specialties Co., INC. Plant #3 | Firestone Area | — | ◐ LIKELY ACTIVE |
| BCBasalite Concrete Solutions LLC | Fort Lupton | — | ◐ LIKELY ACTIVE |
| BCBella Casa Construction and Stone | Littleton | — | ◐ LIKELY ACTIVE |
| BCBestway Concrete CO - Ft Lupton | Fort Lupton | — | ◐ LIKELY ACTIVE |
| BCBestway Concrete Co-longmont | Longmont | — | ◐ LIKELY ACTIVE |
| BCBestway Concrete CO Windsor | Windsor | — | ◐ LIKELY ACTIVE |
| BRBoulder Ready Mix Concrete INC | Boulder | — | ◐ LIKELY ACTIVE |
| BCBurnco Colorado LLC - Colorado Springs (plant 621) | Colorado Springs | — | ◐ LIKELY ACTIVE |
| BPBurnco - Portable Concrete (mustang) | Westminster | — | ◐ LIKELY ACTIVE |
| CCCastle Concrete Company Snyder Quarry | Colorado Springs | — | ◐ LIKELY ACTIVE |
| CTCoorstek - Table Mountain Center East | Arvada | — | ◐ LIKELY ACTIVE |
| CFCornerstone Fabrication Corp. | Arvada | 1–19 | ◐ LIKELY ACTIVE |
| CGCrossfire-bonds Gravel Pit | Durango | — | ◐ LIKELY ACTIVE |
| FPForterra Precast Concepts, INC | Grand Junction | — | ◐ LIKELY ACTIVE |
| FPForterra Precast Concepts, INC. | Henderson | — | ◐ LIKELY ACTIVE |
| FAFrench Assets Corporations | Arvada | 20–99 | ◐ LIKELY ACTIVE |