| Alliance for Energy Innovation LLCGolden | Form 990 | $1,064,585,917FY2025 |
| University Corporation for Atmospheric ResearchBoulder | Form 990 | $288,690,542FY2025 |
| Society for Mining Metallurgy and Exploration IncEnglewood | Form 990 | $18,506,436FY2025 |
| Geological Society of America IncBoulder | Form 990 | $14,634,212FY2025 |
| Keystone Symposia on Molecular and Cellular BiologySilverthorne | Form 990 | $11,371,337FY2025 |
| Space Science InstituteBoulder | Form 990 | $7,238,431FY2025 |
| Engineering Ministries International USAColorado Springs | None required | $6,721,479FY2025 |
| Build ChangeDenver | Form 990 | $4,595,428FY2024 |
| Society of Asian Scientists and EngineersDenver | Form 990 | $3,678,644FY2024 |
| Geological Society of America FoundationBoulder | Form 990 | $3,360,582FY2025 |
| Aspen Center for PhysicsAspen | Form 990 | $3,354,485FY2025 |
| Romano Foundation IncDenver | Form 990 | $2,510,815FY2024 |
| Orient Land TrustVilla Grove | Form 990 | $1,865,227FY2025 |
| Partnership for Clean Competition Research CollaborativeColorado Springs | Form 990 | $1,770,212FY2025 |
| The Freebsd FoundationBoulder | Form 990 | $1,739,644FY2024 |
| American Chemical SocietyLoveland | Form 990 | $1,510,169FY2024 |
| Higher Orbits FoundationAurora | Form 990 | $1,158,465FY2024 |
| Space for HumanityBoulder | Form 990 | $929,414FY2025 |
| Upper Colorado Environmental Plant CenterMeeker | Form 990 | $899,202FY2025 |
| Rocky Mountain Association of GeologistsDenver | Form 990 | $819,854FY2025 |
| TinkermillLongmont | Form 990 | $573,708FY2024 |
| Idea WildFort Collins | Form 990 | $544,385FY2025 |
| Data-Driven Economic Strategies IncMonument | Form 990 | $539,327FY2025 |
| Two Frontiers Project IncFort Collins | Form 990 | $538,377FY2024 |
| Fins Attached Marine Research and ConservationColorado Springs | Form 990 | $495,722FY2024 |
| Targeted Meteorological Systems IncBoulder | Form 990 | $484,013FY2024 |
| Paleocultural Research GroupLongmont | Form 990 | $318,728FY2024 |
| White Dwarf Research CorporationGolden | Form 990 | $305,400FY2025 |
| Mars Society IncLakewood | Form 990 | $284,254FY2025 |
| Bible Archeology Search and Exploration FoundationColorado Springs | Form 990 | $263,551FY2024 |
| Comms VnextLafayette | Form 990 | $235,056FY2024 |
| International Association Offorensic ToxicologistsColorado Springs | Form 990 | $207,667FY2024 |
| Ite Colorado-Wyoming SectionDenver | Form 990-EZ | $183,723FY2025 |
| Darksky ColoradoPaonia | Form 990-EZ | $115,774FY2025 |
| Ddev FoundationPalisade | Form 990-EZ | $114,757FY2025 |
| Scientific Committee on Solar-Terrestrial Physics ScostepBoulder | Form 990-EZ | $98,308FY2025 |
| National Space Science & Technology InstituteColorado Springs | Form 990-EZ | $94,159FY2025 |
| Rocky Mountain Conference Onanalytical Chemistry IncDenver | Form 990-EZ | $92,312FY2025 |
| The Colorado Section of the American Chemical SocietyGolden | Form 990-EZ | $84,356FY2025 |
| Tree-Ring SocietyLoveland | Form 990-EZ | $77,783FY2025 |
| Northern Research Technical Assistance CenterLittleton | Form 990-EZ | $76,399FY2024 |
| Coalition for SafemindsCarbondale | Form 990-EZ | $73,370FY2024 |
| Bridge Engineering InstituteAurora | Form 990-EZ | $65,200FY2025 |
| T-Bolts Group IncMontrose | Form 990-EZ | $65,017FY2025 |
| Mountain District of the Institute of Transportation EngineersMorrison | Form 990-EZ | $63,448FY2025 |
| Restore Together Global Education NetworkDenver | Form 990-EZ | $61,509FY2025 |
| Four Corners Gem and Mineral ClubDurango | Form 990-EZ | $52,294FY2025 |
| Space Infrastructure Foundation IncColorado Springs | Form 990-N | No figure |
| EffectivescGolden | Form 990-N | No figure |
| Society for Science at User Research Facilities SsurfLafayette | Form 990-N | No figure |