| ASAdamantium Solutions Inc. | Englewood | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| ARAdemar Ready Mix | Longmont | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AGA&e Granite & Marble Company | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| AIAggregate Industries | Fort Collins | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Elizabeth, 2.8 Mi W of | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Henderson | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries Wcr INC Francis St Ready Mix Plant | Longmont | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries-wcr, Inc.-johnstown | Johnstown | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AFAlbert Frei & Sons INC | Clear Creek County | CO | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| ASAmerican Solid Stone | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| AAAnderman Assets LLC | Lakewood | CO | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| AArcee | Castle Rock Area | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| ACArco Concrete INC. | Fort Lupton | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| ASArizona Shower Doors of Colorado, LLC | Denver | CO | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| ATArtisic Tile & Granite | Durango | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| ACAsi Const- Portable Concrete Batch Plant | Pueblo West | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAsi Constructors, INC. | Pueblo West | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ATAt Thompson | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| ACAvery Construction (out of Business) | Buena Vista | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BBBall, Ball and Brosamer INC | Denver (portable) | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BBBangert Bros Const (deleted 2/1/90) | Unknown | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BIBarlett INC | Moffatt | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBarnekow Construction & Supply | Commerce City | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBasalite Concrete Products | Fort Lupton | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| BCBasalite Concrete Products LLC. | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| BEB&b Excavating INC | Edwards | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BMBedrock Marble & Granite, INC. | Longmont | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BCBella Casa Construction and Stone | Littleton | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BSBellagio Stone INC. | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BGBella Glass Production, Inc. | Denver | CO | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| BCBestwat Concrete-11401 Wcr 9 3/4 | Fort Lupton | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BCBestway Concrete CO | No City Name | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBestway Concrete Co-greeley | Greeley | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BGBg Glass | Westminster | CO | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| BHBh Holdings INC | Centennial | CO | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| BMBloxom Manufacturing | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix Company | Rifle | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix West Plant | Denver | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BWBrannan West Plant | Denver | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BTBrekhus Tile & Stone | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BWBristol Works LTD - Cultured Marble Prod | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BABuild America | Sedalia | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| BCBurnco Colorado LLC - Portable Rmx 1 | Denver | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BCBurnco Colorado - Portable Engine | Milliken | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| CPCaledonian Properties LLC | Centennial | CO | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| CCCamas Colorado INC Ready Mix Division.cn | Idaho Springs | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CGCapitol Glass & Aluminum CORP | Aurora | CO | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| CKCapstone Kitchen & Bath, LLC | Fort Collins | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| CCCarder Concrete Plt No 2 | Arvada | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| CCCarder Concrete Products CO | Littleton | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
