| BCBella Casa Construction and Stone | Littleton | — | ◇ UNVERIFIED |
| BSBellagio Stone INC. | Denver | — | ◇ UNVERIFIED |
| BGBella Glass Production, Inc. | Denver | — | ◇ UNVERIFIED |
| BCBestwat Concrete-11401 Wcr 9 3/4 | Fort Lupton | — | ◇ UNVERIFIED |
| BCBestway Concrete CO | No City Name | — | ◇ UNVERIFIED |
| BCBestway Concrete Co-greeley | Greeley | — | ◇ UNVERIFIED |
| BGBg Glass | Westminster | — | ◇ UNVERIFIED |
| BHBh Holdings INC | Centennial | — | ◇ UNVERIFIED |
| BMBloxom Manufacturing | Colorado Springs | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix Company | Rifle | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix West Plant | Denver | — | ◇ UNVERIFIED |
| BWBrannan West Plant | Denver | — | ◇ UNVERIFIED |
| BTBrekhus Tile & Stone | Denver | — | ◇ UNVERIFIED |
| BWBristol Works LTD - Cultured Marble Prod | Denver | — | ◇ UNVERIFIED |
| BABuild America | Sedalia | — | ◇ UNVERIFIED |
| BCBurnco Colorado LLC - Portable Rmx 1 | Denver | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Portable Engine | Milliken | — | ◇ UNVERIFIED |
| CPCaledonian Properties LLC | Centennial | — | ◇ UNVERIFIED |
| CCCamas Colorado INC Ready Mix Division.cn | Idaho Springs | — | ◇ UNVERIFIED |
| CGCapitol Glass & Aluminum CORP | Aurora | — | ◇ UNVERIFIED |
| CKCapstone Kitchen & Bath, LLC | Fort Collins | — | ◇ UNVERIFIED |
| CCCarder Concrete Plt No 2 | Arvada | — | ◇ UNVERIFIED |
| CCCarder Concrete Products CO | Littleton | — | ◇ UNVERIFIED |
| CCCastle Concrete CO Queens Canyon Quarry | Colorado Springs | — | ◇ UNVERIFIED |
| CRCastle Rock Const - Q150 Plant, Port Cbp | Centennial | — | ◇ UNVERIFIED |
| CCCemex Construction Materials - Florence | Florence | — | ◇ UNVERIFIED |
| CCCemex Construction Materials - Lyons | Lyons Area | — | ◇ UNVERIFIED |
| CLCfi, LLC (commercial Fabrication & Installation) | Commerce City | — | ◇ UNVERIFIED |
| CCCity Concrete (deleted 4/1977) | Englewood | — | ◇ UNVERIFIED |
| CSClassic Surfaces Gj, LLC | Grand Junction | — | ◇ UNVERIFIED |
| CSClassic Surfaces, INC. | Grand Junction | — | ◇ UNVERIFIED |
| CCColar Compounds INC | Colorado Springs | — | ◇ UNVERIFIED |
| CFColorado's Flooring & Granite, INC | Commerce City | — | ◇ UNVERIFIED |
| CGColumbine Granite, INC. | Littleton | — | ◇ UNVERIFIED |
| CCCommunity Clay, LLC | Denver | — | ◇ UNVERIFIED |
| CECoorstek, Electronic Products Group | Golden | — | ◇ UNVERIFIED |
| CHCopeland Holdings, LLC | Watkins | — | ◇ UNVERIFIED |
| CFCornerstone Fabrication Corp. | Arvada | — | ◇ UNVERIFIED |
| CNCosentino North America | Denver | — | ◇ UNVERIFIED |
| CCCountertop Concepts CO, LLC | Littleton | — | ◇ UNVERIFIED |
| CCCowan Concrete Products INC Batch Plt | Greeley | — | ◇ UNVERIFIED |
| CCCroell - Croell Portable #2 | Sundance | — | ◇ UNVERIFIED |
| CVC&s Ventures, INC. | Denver | — | ◇ UNVERIFIED |
| CECustom Edge Marble & Granite LLC | Denver | — | ◇ UNVERIFIED |
| CGCustom Granite Interiors, LLC | Denver | — | ◇ UNVERIFIED |
| CECutting Edge Granite | Denver | — | ◇ UNVERIFIED |
| DCDakolios Const Portable | Denver | — | ◇ UNVERIFIED |
| DMDavalos Marble | New Castle | — | ◇ UNVERIFIED |
| DADavid and McKenzie Valance | Granby | — | ◇ UNVERIFIED |
| DADenver Architechural Precast INC | Henderson | — | ◇ UNVERIFIED |
