| ECEngineered Coating Application and Techn | Denver | CO | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| EIEntegris INC | Colorado Springs | CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| EOEntenmanns Oroweat Foods Company | Denver | CO | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| EEEnvironmental Energy Partners | Silver Plume | CO | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| EPEstey Printing | Boulder | CO | Printing and Related Support Activities323110 | — | ◇ 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 |
| EMEverist Materials - Concrete Batc H Plnt | Kremmling | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FIFarmland Industries INC Ault Plt | Ault | CO | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| FHFederal Highway Administration-central Federal Land | Lakewood | CO | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| FIFiberon INC | Fort Collins | CO | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| FLFinishes LTD | Colorado Springs | CO | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| FFFinishing First INC | Denver | CO | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| FIFintech INC | Denver | CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FPFirebaugh Precast, INC. | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ 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 |
| FCFirst Corked, LLC | Arvada | CO | Beverage and Tobacco Product Manufacturing312130 | — | ◇ UNVERIFIED |
| FSFisher Sand and Gravel | Placitas, Nm | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| FBFittje Bros Printing CO | Colorado Springs | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| FBFittje Brothers Printing | Colorado Springs | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| FCF-J Custom Hay, LLC | LaSalle | CO | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| FFFlexible Foam Products INC | Pueblo | CO | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| FGFlint Group North America Corporation | Denver | CO | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
 Forest Energy Corp.- Wood Pellet Plt | Kremmling | CO | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| FFFossil Fuel Energy Services | Fort Lupton | CO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| FFFountain Foundry Dba F F Acquisition CO | Pueblo | CO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| FPFrontier Paving - Rifle Asphalt Plant | Rifle | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| FRFront Range Aggregates, LLC | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| FRFront Range Fabrications INC | Denver | CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FRFront Range Reddi Mix - 651 S Cr 9e | Loveland Area | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| FRFront Range Steel INC | Fort Collins | CO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| FRFront Range Tooling INC | Boulder | CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| FCFruita Consumers Coop Assoc - Fruita Fm | Fruita | CO | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| FDFulton Denver Company | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| FIFuse, INC | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| FIFuse, INC. - Printing | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| GSGates & Son | Denver | CO | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| GOGcc of Denver INC | Henderson | CO | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| GTGcr Tires - Denver Retread Shop | Denver | CO | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| GTGcr Tires - Fountain Retread Shop | Fountain | CO | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
 General Chemical Corporation | Denver | CO | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| GPGeneral Production Devices | Grand Junction | CO | Machinery Manufacturing333248 | — | ◇ UNVERIFIED |
| GBGenesis Baking Co LLC | Evans | CO | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| GFGenesis Fixtures Incorporated | Fort Collins | CO | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| GOGe Oil & Gas Pressure Ctrl - 841 21 1/2 | Grand Junction | CO | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GEGlobex Extraction Services | Loveland | CO | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| GDGo Dan Ind | Denver | CO | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| GBGoldberg Brothers Incorporated | Denver | CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
