| RCRocla Concrete Tie Incorporated | Denver | — | ◇ UNVERIFIED |
| RMRoyal Marble, LLC | Florence | — | ◇ UNVERIFIED |
| STSchlumberger Technology Corporation | Grand Junction | — | ◇ UNVERIFIED |
| SCSiegrist Construction CO -del Camino Pit | Longmont | — | ◇ UNVERIFIED |
| SCSimon Contractors - Bennett Ready-mix | Bennett | — | ◇ UNVERIFIED |
| SCSimon Contractors Dba Ogallala Ready Mix | Ogallala | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix - Osage Portable Plant | Denver | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix - Summit View Ready Mix | Fort Collins | — | ◇ UNVERIFIED |
| SMSpanish Mill Granite CO. INC. | Buena Vista | — | ◇ UNVERIFIED |
| SWSpn Well Services - Fort Lupton Facility | Fort Lupton Area | — | ◇ UNVERIFIED |
| SES&s Enterprises, INC. | Steamboat Springs | — | ◇ UNVERIFIED |
| SWStone Wholesale - Brownstone Quarry | Laporte | — | ◇ UNVERIFIED |
| SWStone Works Marble and Granite | Denver | — | ◇ UNVERIFIED |
| SRSuburban Reddi Mix CO | Adams Cnty | — | ◇ UNVERIFIED |
| THTezak Heavy Equipment CO | Canon City | — | ▲ REPORTED CLOSED |
| TITopperscot INC | Denver | — | ◇ UNVERIFIED |
| TMTransit Mix Concrete | Pueblo West | — | ◇ UNVERIFIED |
| TMTransit Mix of Pueblo | Pueblo | — | ◇ UNVERIFIED |
| TMTransit Mix of Pueblo (kolberg Screen) | Pueblo | — | ◇ UNVERIFIED |
| URUnited Ready Mix - Platteville | Platteville | — | ◇ UNVERIFIED |
| VIValco INC | Canon City | — | ◇ UNVERIFIED |
| VIValco INC | Rocky Ford | — | ◇ UNVERIFIED |
| VIValcrete, INC. - Concrete Batch Plant | Swink Area | — | ◇ UNVERIFIED |
| VBValley Block Loveland Facility | Loveland | — | ◇ UNVERIFIED |
| VCVarra Companies INC Ft Lupton Plant 2 | Fort Lupton | — | ◇ UNVERIFIED |
| WCWells Concrete - Architectural Plant | Denver | — | ◇ UNVERIFIED |
| WDWells Denver Precast | Brighton | — | ◇ UNVERIFIED |
| WSWestern Stone Company of Lyons | Lyons | — | ◇ UNVERIFIED |
| WRWest Ranch Aggregate - Port Generator | Rocky Ford Area | — | ◇ UNVERIFIED |
| WRWhite River Sand & Gravel-meeker Pit | Meeker | — | ◇ UNVERIFIED |
| ASArizona Shower Door - Denver | Denver | 20–99 | ◐ LIKELY ACTIVE |
| BCBasalite - Colorado Springs | Colorado Springs | 1–19 | ◐ LIKELY ACTIVE |
| BFBasalite - Fort Lupton | Fort Lupton | 20–99 | ◐ LIKELY ACTIVE |
| BFBasalite - Fort Lupton | Ft. Lupton | 20–99 | ◐ LIKELY ACTIVE |
| BRBrannan Ready Mix Central | Commerce City | 20–99 | ◐ LIKELY ACTIVE |
| BRBrannan Ready Mix South | Englewood | 1–19 | ◐ LIKELY ACTIVE |
| BCBurnco - CO Springs CO | Colorado Springs | 20–99 | ◐ LIKELY ACTIVE |
| BFBURNCO - Firestone | Firestone | 1–19 | ◐ LIKELY ACTIVE |
| BFBURNCO - Fort Lupton CO | Fort Lupton | 20–99 | ◐ LIKELY ACTIVE |
| BFBURNCO - Fort Lupton CO | Ft Lupton | 20–99 | ◐ LIKELY ACTIVE |
| BJBurnco - Jeffco CO | Golden | 20–99 | ◐ LIKELY ACTIVE |
| BKBurnco - Kiowa CO | Kiowa | 1–19 | ◐ LIKELY ACTIVE |
| BPBURNCO - Portable CO | Henderson | 1–19 | ◐ LIKELY ACTIVE |
| BTBurnco - Titan CO | Littleton | 1–19 | ◐ LIKELY ACTIVE |
| CCColorado Centennial Arapahoe Road | Centennial | 1–19 | ◐ LIKELY ACTIVE |
| CCColorado Colorado Springs 1835 South Murray Boulevard | Colorado Springs | 1–19 | ◐ LIKELY ACTIVE |
| CEColorado Englewood Inverness Parkway | Englewood | 1–19 | ◐ LIKELY ACTIVE |
| CGColorado Greenwood Village 5375 Landmark Place | Greenwood Village | 1–19 | ◐ LIKELY ACTIVE |
| CJColorado Johnstown Thompson Parkway | Johnstown | 1–19 | ◐ LIKELY ACTIVE |
| CLColorado Loveland Powell Street | Loveland | 1–19 | ◐ LIKELY ACTIVE |