| ASAbound Solar | Fort Collins | CO | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ASAccurate Screen Printing | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| AIAccu-type, INC. | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
 Acme Foundry INC | Denver | CO | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AMAdams Mcclure | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| AMAdams Mcclure - Inca Street | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| AAdplex | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ACAdvantage Coatings Technologies | Broomfield | CO | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| ASAe Staley Mfg CO | Monte Vista | CO | Food Manufacturing311221 | — | ◇ UNVERIFIED |
| ACAestheticTec Crown & Bridge, Ltd. | Aurora | CO | Miscellaneous Manufacturing339116 | — | ◇ UNVERIFIED |
| ALAfgo Laboratories INC | Denver | CO | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| ABAgc Biologics - 4000 Nelson Rd | Longmont | CO | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AIAgfinity INC - Mead Dry Fertilizer Plant | Mead | CO | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| AIAggregate Industries | Brighton | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries | Windsor | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries, Golden Ready Mix Plant | Golden | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Franktown | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Denver | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Westminster | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Brighton | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC | Louisville | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Denver | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Longmont | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Fort Collins | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. | Greeley | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr INC. Gun Club Ready Mix Plant | Aurora | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Wcr, INC. -havana | Aurora | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries-wcr INC -ww Farms P | Greeley | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AOAgland/land O'lakes Feed Mill | Eaton | CO | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| ADAgreeable Dental Care LLC | Aurora | CO | Miscellaneous Manufacturing339116 | — | ◇ UNVERIFIED |
| AGAgrium - Greeley Esn Pilot Plant | Greeley | CO | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| ADAirgas Denver Asu | Denver | CO | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| AIAirgas Intermountain, INC | Henderson | CO | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| AWAir West Aviation | Parker | CO | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| AOAlameda Ornamental Iron | Denver | CO | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| ABAlbert's Bullnosing, INC. | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| APAlcoa Packaging Machinery | Englewood | CO | Machinery Manufacturing333513 | — | ◇ UNVERIFIED |
| AAAll American Homes of Colorado, LLC | Milliken | CO | Wood Product Manufacturing321992 | — | ◇ UNVERIFIED |
| AAAll American Resourcse - North D-22 Pit | Delta | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ATAlliant Techsystems INC | Littleton | CO | Chemical Manufacturing325920 | — | ◇ UNVERIFIED |
| ATAllied Trades INC Dba Allied Steel CO | Denver | CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| APAll Packaging CO - 14806 E 33rd Pl | Aurora | CO | Paper Manufacturing322212 | — | ◇ UNVERIFIED |
| ACAlpine Custom Shutters INC. | Englewood | CO | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| APAlpine Printing Incorporated | Arvada | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ARAlpine Roastery, INC. | Englewood | CO | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| ASAlpine Steel Fabricators | Simla | CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| ASAlpine Steel Fabricators | Colorado Springs | CO | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| ATAlternative Tech - Formerly Owned By Hp | Englewood | CO | Computer and Electronic Product Manufacturing334118 | — | ◇ UNVERIFIED |
| ASAmato Shutter & Door CO | Englewood | CO | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| AFAmerican Furniture Warehouse | Firestone | CO | Furniture and Related Product Manufacturing337125 | — | ◇ UNVERIFIED |
