| DWDenver Water - Westside | Denver, CO | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| DMDesigner Marble Dba Benray Designer Marb | Lakewood, CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| DFDesign Fabricators, INC. | Thornton, CO | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| DGDigital Globe Westminster Campus | Westminster, CO | Computer and Electronic Product Manufacturing334000 | — | ◇ UNVERIFIED |
| DGDi Graphics | Wheat Ridge, CO | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| DGDilley Graphics INC | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| DIDip in Strip | Denver, CO | Furniture and Related Product Manufacturing337121 | — | ◇ UNVERIFIED |
| DPDirect Press | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| DSDirect Sign Wholesale | Denver, CO | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| DMDiversified Metal Products, INC | Englewood, CO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| DRDomore Recycling | Denver, CO | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| DJDow Jones & CO INC | Englewood, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| DMDp Media Network - the Denver Post | Denver, CO | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
 Drake Williams Steel | Aurora, CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| DRDun Rite Home Improvements INC | Englewood, CO | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| EBEast Baltimore Bakery of Denver | Denver, CO | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| EPEastwood Printing & Publishing CO | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| EAEaton Aviation Corporation | Aurora, CO | Fabricated Metal Product Manufacturing332919 | — | ◇ UNVERIFIED |
| EMEaton Metal Products CO | Denver, CO | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
| ECE & C Precast Concrete, INC. | Littleton, CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| EPEgan Printing CO | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ECElam Clear Creek Batch Plant | Idaho Springs, CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| EPElectric Power Equipment Company | Denver, CO | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| ELElectron Littleton | Littleton, CO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EAElf Asphalt INC | Commerce City, CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| EPEmpire Pd1 | Denver, CO | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| ECEngineered Coating Application and Techn | Denver, CO | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| EBEnsign Bickford CO | Littleton, CO | Chemical Manufacturing325920 | — | ◇ UNVERIFIED |
| EOEntenmanns Oroweat Foods Company | Denver, CO | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| EEEnvironmental Energy Partners | Silver Plume, CO | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| EPEvent Promotion Supply INC | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| EPEvent Promotion Supply INC | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ERExacta Rubber INC | Commerce City, CO | Plastics and Rubber Products Manufacturing326220 | — | ◇ UNVERIFIED |
| ETExcel Tops INC | Commerce City, CO | Furniture and Related Product Manufacturing337127 | — | ◇ UNVERIFIED |
| FIFarmland Ind INC | Henderson, CO | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| FHFederal Highway Administration-central Federal Land | Lakewood, CO | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| FFFinishing First | Castle Rock, CO | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| FFFinishing First INC | Denver, CO | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| FIFintech INC | Denver, CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FBFirestone Building Products | Aurora, CO | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| FBFirestone Building Products CO | Denver, CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| FRFirestone Retread | Denver, CO | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| FPFlatirons Paving | Sheridan, CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| FGFlint Group North America Corporation | Denver, CO | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| FPForsch Polymer CORP. | Denver, CO | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| FPForterra Precast Concepts, INC. | Henderson, CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| FRFront Range Fabrications INC | Denver, CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FRFront Range Plating INC | Englewood, CO | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| FRFront Range Tire Recycle INC | Sedalia, CO | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| FDFulton Denver Company | Denver, CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
