| RARaytheon Aircraft Co(was Beech Aircraft) | Boulder, CO | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| RTRe Trousil CO INC | Louisville, CO | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| RORex Oil CO INC | Lyons, CO | Petroleum and Coal Products Manufacturing324110 | — | ◇ UNVERIFIED |
| RIRockmont Ind INC | Louisville, CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| RMRocky Mountain Instrument CO | Longmont, CO | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| RCRoyal Crest Dairy Longmont | Longmont, CO | Food Manufacturing311511 | — | ◇ UNVERIFIED |
| RORudi's Organic Bakery | Boulder, CO | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| SCSae Circuits Colorado INC | Boulder, CO | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| SCSae Circuits Colorado INC | Boulder, CO | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
Seagate Technology LLC | Longmont, CO | Computer and Electronic Product Manufacturing334112 | — | ◇ UNVERIFIED |
| SISheldahl INC | Longmont, CO | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| SSSierra Space | Louisville, CO | Transportation Equipment Manufacturing336419 | — | ◇ UNVERIFIED |
| SSSierra Space | Louisville, CO | Transportation Equipment Manufacturing336419 | — | ◇ UNVERIFIED |
| SSSierra Space | Louisville, CO | Transportation Equipment Manufacturing336419 | — | ◇ UNVERIFIED |
| STSirna Therapeutics, INC. | Boulder, CO | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| SPSolid Power - 486 S. Pierce Ave | Louisville, CO | Electrical Equipment, Appliance & Component Manufacturing335911 | — | ◇ UNVERIFIED |
| STStorage Technology CORP Clover Basin Dr | Longmont, CO | Computer and Electronic Product Manufacturing334112 | — | ◇ UNVERIFIED |
| SMSun Microsystems INC | Louisville, CO | Computer and Electronic Product Manufacturing334119 | — | ◇ UNVERIFIED |
| SMSunrise Medical Hhg INC Mobil Prod Div | Boulder, CO | Miscellaneous Manufacturing339113 | — | ◇ UNVERIFIED |
| TDTegrant Diversified Brands, INC | Longmont, CO | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| TTTrend Technologies INC Colorado Div | Longmont, CO | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| VTVapor Technologies INC | Longmont, CO | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| WLWedgewood, LTD. - Boxelder St | Louisville, CO | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| WDWestern Disposal, INC | Boulder, CO | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| WDWestern Disposal - Portable Grinder 424 | Boulder Area, CO | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| WIWood in 2 Wood | Longmont, CO | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| WRWood Recovery Systems INC | Longmont, CO | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| 2T2000 Taylor | Louisville, CO | Transportation Equipment Manufacturing336414 | 100–499 | ◐ LIKELY ACTIVE |
| 3C3 Cool Cats | Longmont, CO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| AWAbbott & Wallace Distilling Company | Longmont, CO | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| AWAccentual Wines LLC | Longmont, CO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
American Converters Longmont | Longmont, CO | Plastics and Rubber Products Manufacturing326150 | 20–99 | ◐ LIKELY ACTIVE |
| AOAmerican Outdoor Products, Inc | Boulder, CO | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
AMP Robotics - Colorado Headquarters | Louisville, CO | Machinery Manufacturing333248 | 100–499 | ◐ LIKELY ACTIVE |
| ABAvery Brewing Company | Boulder, CO | Beverage and Tobacco Product Manufacturing312120 | 20–99 | ◐ LIKELY ACTIVE |
| BIB.i. Incorporated | Boulder, CO | Machinery Manufacturing333998 | — | ◐ LIKELY ACTIVE |
| BDBison Designs LLC | Longmont, CO | Textile Mills313310 | 20–99 | ◐ LIKELY ACTIVE |
Blue Canyon Technologies - Crescent, LLC | Lafayette, CO | Computer and Electronic Product Manufacturing334220 | 100–499 | ◐ LIKELY ACTIVE |
| BCBoco Cider Corporation | Boulder, CO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BVBookcliff Vineyards | Boulder, CO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BBoulder | Boulder, CO | Chemical Manufacturing325412 | 100–499 | ◐ LIKELY ACTIVE |
| BFBoulder Facility | Boulder, CO | Fabricated Metal Product Manufacturing332813 | 100–499 | ◐ LIKELY ACTIVE |
| BMBoulder Manufacturing | Boulder, CO | Chemical Manufacturing325411 | 1–19 | ◐ LIKELY ACTIVE |
| BOBoulder Orchard Cider | Longmont, CO | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| C1Chocolove - 1180 S 57th Court | Boulder, CO | Food Manufacturing311352 | 20–99 | ◐ LIKELY ACTIVE |
| CWCiatano Winery | Lyons, CO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| CGCircle Graphics - Longmont | Longmont, CO | Printing and Related Support Activities323111 | 100–499 | ◐ LIKELY ACTIVE |
| CSCold Spark, LLC | Longmont, CO | Machinery Manufacturing333248 | — | ◐ LIKELY ACTIVE |
| CMCorza Medical - Boulder | Boulder, CO | Miscellaneous Manufacturing339112 | 100–499 | ◐ LIKELY ACTIVE |
| CCCulture Club LLC | Louisville, CO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |