| GGypsum | Gypsum | 1–19 | ◐ LIKELY ACTIVE |
| LCLangston Concrete, INC | Florence | — | ◐ LIKELY ACTIVE |
| LCLoveland CT | Loveland | 20–99 | ◐ LIKELY ACTIVE |
| PLPete Lien & Sons Colorado Springs Ready Mix | Colorado Springs | 20–99 | ◐ LIKELY ACTIVE |
| PCPS Colorado Denver Moline Street | Denver | 1–19 | ◐ LIKELY ACTIVE |
| RMRaptor Materials Erie BP4 | Erie | 20–99 | ◐ LIKELY ACTIVE |
| RMRaptor Materials North BP1N | Greeley | 20–99 | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company Lafayette | Lafayette | 20–99 | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company Sedalia | Sedalia | 1–19 | ◐ LIKELY ACTIVE |
| RPReliance Precast Systems | Dacono | 20–99 | ◐ LIKELY ACTIVE |
| RRifle | Rifle | 1–19 | ◐ LIKELY ACTIVE |
| SCSilva Construction, INC. | Brighton | — | ◐ LIKELY ACTIVE |
| TGTRULITE GLASS AND ALUMINUM SOLUTIONS LLC - Denver | Aurora | 20–99 | ◐ LIKELY ACTIVE |
| VCVaughn Concrete Products, Inc. - CO Plant | Henderson | 20–99 | ◐ LIKELY ACTIVE |
| WCWells Concrete Sealants | Brighton | 1–19 | ◐ LIKELY ACTIVE |
| GMGranite & Marble Designs, LLC | Denver | — | ◇ UNVERIFIED |
| 3P3d Piering & Home Improvement, Inc.cn | Commerce City | — | ◇ UNVERIFIED |
| AFAbbey Fabrication and Installations, LLC | Grand Junction | — | ◇ UNVERIFIED |
| AWAccent Window INC | Denver | — | ◇ UNVERIFIED |
| AWAccent Windows Products INC | Denver | — | ◇ UNVERIFIED |
| ABAcme Brick Company | Castle Rock | — | ◇ UNVERIFIED |
| ARAction Ready Mix, LLC | Pueblo | — | ◇ UNVERIFIED |
| ASAdamantium Solutions Inc. | Englewood | — | ◇ UNVERIFIED |
| ARAdemar Ready Mix | Longmont | — | ◇ UNVERIFIED |
| AGA&e Granite & Marble Company | Colorado Springs | — | ◇ UNVERIFIED |
| AIAggregate Industries | Fort Collins | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Henderson | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Elizabeth, 2.8 Mi W of | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Francis St Ready Mix Plant | Longmont | — | ◇ UNVERIFIED |
| AIAggregate Industries-wcr, Inc.-johnstown | Johnstown | — | ◇ UNVERIFIED |
| AFAlbert Frei & Sons INC | Clear Creek County | — | ◇ UNVERIFIED |
| AMAmerica Marble and Granite, INC. | Commerce City | — | ◇ UNVERIFIED |
| ASAmerican Solid Stone | Denver | — | ◇ UNVERIFIED |
| AAAnderman Assets LLC | Lakewood | — | ◇ UNVERIFIED |
| AArcee | Castle Rock Area | — | ◇ UNVERIFIED |
| ACArco Concrete INC. | Fort Lupton | — | ◇ UNVERIFIED |
| ASArizona Shower Doors of Colorado, LLC | Denver | — | ◇ UNVERIFIED |
| ATArtisic Tile & Granite | Durango | — | ◇ UNVERIFIED |
| ACAsi Const- Portable Concrete Batch Plant | Pueblo West | — | ◇ UNVERIFIED |
| ACAsi Constructors, INC. | Pueblo West | — | ◇ UNVERIFIED |
| ATAt Thompson | Denver | — | ◇ UNVERIFIED |
| ACAvery Construction (out of Business) | Buena Vista | — | ◇ UNVERIFIED |
| BBBall, Ball and Brosamer INC | Denver (portable) | — | ◇ UNVERIFIED |
| BBBangert Bros Const (deleted 2/1/90) | Unknown | — | ◇ UNVERIFIED |
| BIBarlett INC | Moffatt | — | ◇ UNVERIFIED |
| BCBarnekow Construction & Supply | Commerce City | — | ◇ UNVERIFIED |
| BCBasalite Concrete Products | Fort Lupton | — | ◇ UNVERIFIED |
| BCBasalite Concrete Products LLC. | Colorado Springs | — | ◇ UNVERIFIED |
| BEB&b Excavating INC | Edwards | — | ◇ UNVERIFIED |
| BMBedrock Marble & Granite, INC. | Longmont | — | ◇ UNVERIFIED |
