| SPSummit Pressed Brick - Brick Mfg Plt | Pueblo | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries - Castle Rock Plant | Castle Rock | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Drake Ready Mix Plant | Fort Collins | — | ◇ UNVERIFIED |
| CRCentral Ready Mix, LLC | Denver Area | — | ◇ UNVERIFIED |
| MMMonarch Marble INC | Denver | — | ◇ UNVERIFIED |
| NRNorthwest Ready Mix Port Ops, INC | Craig Area | — | ◇ UNVERIFIED |
| RMRecycled Materials Company INC | Arvada | — | ◇ UNVERIFIED |
| WRWray Readi Mix INC. | Wray | — | ◇ UNVERIFIED |
| BGBella Glass Production, Inc. | Denver | 1–19 | ◐ LIKELY ACTIVE |
| BCBurnco - Colorado Springs Plant | Colorado Springs | — | ◐ LIKELY ACTIVE |
| CGColumbine Granite, INC. | Littleton | 1–19 | ◐ LIKELY ACTIVE |
| GMGranite & Marble Designs, LLC | Denver | — | ◐ LIKELY ACTIVE |
| LCLoveland CT | Loveland | 20–99 | ◐ LIKELY ACTIVE |
| PSPinnacle Stoneworks LLC | Denver | 1–19 | ◐ LIKELY ACTIVE |
| TDThe Davis Whitehall Co | Colorado Springs | 1–19 | ◐ LIKELY ACTIVE |
| WMWilhelm Mounment | Colorado Springs | 1–19 | ◐ LIKELY ACTIVE |
| CCCompact Ceramics LLC | Penrose | 1–19 | ◐ LIKELY ACTIVE |
| CCCbmm Concrete LLC - Crested Butte Plant | Crested Butte Area | 1–19 | ◇ UNVERIFIED |
| DRDorn Ready Mix | Fort Morgan Area | 1–19 | ◇ UNVERIFIED |
| ECE & C Precast Concrete, INC. | Littleton | 20–99 | ◇ UNVERIFIED |
Vasquez Ready Mix LLC - Ross Bandit | Denver | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Riverview Ready Mix Plant | Littleton | — | ◐ LIKELY ACTIVE |
| ARAll Rite Paving & Redi Mix INC | La Junta | — | ◐ LIKELY ACTIVE |
| AMAmerica Marble and Granite, INC. | Commerce City | — | ◐ LIKELY ACTIVE |
| AGAmerican Gypsum Marketing Company | Gypsum | 100–499 | ◐ LIKELY ACTIVE |
| AAAnderman Assets LLC | Lakewood | — | ◐ LIKELY ACTIVE |
| ARAndesite Rock Company | Henderson | — | ◐ LIKELY ACTIVE |
| BCBestway Concrete CO | Windsor | — | ◐ LIKELY ACTIVE |
| CECentex Eagle Gypsum CO LLC | Gypsum | — | ◐ LIKELY ACTIVE |
| CLColorado Lien CO | Fort Collins | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Golden | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Golden | — | ◐ LIKELY ACTIVE |
| CICoorstek, INC. | Grand Junction | — | ◐ LIKELY ACTIVE |
| CICoorsTek Inc. - Center for Advanced Materials (CCAM) | Golden | 100–499 | ◐ LIKELY ACTIVE |
| DADenver Arapahoe - Chemical Waste Process Facility - Landfill | Aurora | — | ◐ LIKELY ACTIVE |
| DMDenver Marble Concepts | Denver | — | ◐ LIKELY ACTIVE |
| ESElemental Scientific Glassblowing | Golden | 20–99 | ◐ LIKELY ACTIVE |
| ECEncon Colorado, LLC | Denver | 20–99 | ◐ LIKELY ACTIVE |
| EPErie Pre-cast | Erie | — | ◐ LIKELY ACTIVE |
| FSFlashfill Services LLC - Denver Yard | Commerce City | — | ◐ LIKELY ACTIVE |
| FDFlatiron Dragados Const- Dia Batch Plant | Denver | — | ◐ LIKELY ACTIVE |
| FMFreeway Marble & Granite | Denver | — | ◐ LIKELY ACTIVE |
| GQGJT Quikrete | Grand Junction | 1–19 | ◐ LIKELY ACTIVE |
| GBGreen Brothers INC. | Fort Morgan | — | ◐ LIKELY ACTIVE |
| HGHartung Glass Industries Pueblo CO. | Pueblo | 20–99 | ◐ LIKELY ACTIVE |
| HLHoch Lumber | Yuma | — | ◐ LIKELY ACTIVE |
| HWHolcim Wcr - Cs-portable | Colorado Springs | — | ◐ LIKELY ACTIVE |
| JMJordan Marble & Granite, LLC | Loveland | — | ◐ LIKELY ACTIVE |
| KMKast Marble | Colorado Springs | — | ◐ LIKELY ACTIVE |
| LRLeone Ready Mix LLC | Trinidad | — | ◐ LIKELY ACTIVE |