| AWAccent Windows Products INC | Denver | CO | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| AKAce Kaufman Rubber Stamp & Seal CO | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| ARAction Recycling CORP | Denver | CO | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| AIAeridyne, INC. | Denver | CO | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| AIAgility, Inc. | Denver | CO | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| AHAjs Holdings, LLC | Denver | CO | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| ARA-korn Roller INC (relocated to 0311145) | Denver | CO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| AIAksels Inc | Denver | CO | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| AIAksels Inc. | Denver | CO | Apparel Manufacturing315280 | — | ◇ UNVERIFIED |
| ABAlchemy Bikes | Denver | CO | Transportation Equipment Manufacturing336991 | — | ◇ UNVERIFIED |
| AAAll American Forms Manufacturing, INC. | Denver | CO | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ALAlpine Lumber CO Dba Rocky Mtn Prestain | Denver | CO | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| APAmbassador Printing | Denver | CO | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| ASAmerican Solid Stone | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| AKAmericopy (aka Kwik Kopy) | Denver | CO | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| ADAnderson Die Casting, LLC | Denver | CO | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| AAAndreas Artistic Furs and Leather, LTD. | Denver | CO | Apparel Manufacturing315292 | — | ◇ UNVERIFIED |
| AMAndy Maylish Fabrication INC. | Denver | NC | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| AMAntique Metal Fab INC | Denver | CO | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| AGAnton Giles Partnership LLC | Denver | CO | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| AHApcna Holdings LLC | Denver | CO | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| ASApex Sign CO LLC | Denver | CO | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| AOApparel on Target, Inc. | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| ASArizona Shower Doors of Colorado, LLC | Denver | CO | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| AMArk Molding INC. | Denver | CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| ASA Small Print Shop LLC | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| ATAt Thompson | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| AHAustin Hardwood of Denver | Denver | CO | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| BLBakeology LLC | Denver | NC | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| BHBal Harbour (out of Service) | Denver | CO | Furniture and Related Product Manufacturing337127 | — | ◇ UNVERIFIED |
| BMBanner Manufacturing LLC | Denver | CO | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BGBarela Grafix | Denver | CO | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| BMBarton Mfg CO | Denver | CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| BEBeazer East INC (former Koppers Wood Treating Facility - Denver) | Denver | CO | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| BSBellagio Stone INC. | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BGBella Glass Production, Inc. | Denver | CO | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| BBBeyond Broadway, LLC | Denver | CO | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| BRBill Reich Printing CO | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| BIBio-safe Industries Inc.cn | Denver | CO | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| BDBlack Diamond Asphalt | Denver | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BIBlack Iron Retreading | Denver | CO | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| BSBlack Shirt Brewing Co. | Denver | CO | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| BPBlacktop Paving Deleted 9/15/78 | Denver | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BLBlaze LLC | Denver | CO | Food Manufacturing311352 | — | ◇ UNVERIFIED |
| BMBlueprint Manufacturing Inc | Denver | CO | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| BHBob Howe & CO | Denver | CO | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| BDBold Designs | Denver | CO | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| BHBollman Hat Company | Denver | PA | Apparel Manufacturing315991 | — | ◇ UNVERIFIED |
| BSBorder States Paving Srti | Denver | CO | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BUBottles Unlimited, INC. | Denver | CO | Plastics and Rubber Products Manufacturing326160 | — | ◇ UNVERIFIED |
