| Colorado State University Foundation | 501(c)(3) | 1971 | $117.2 million | $864.9 million | 2025-06 |
| Colorado Early Colleges | 501(c)(3) | 2007 | $81.2 million | $168 million | 2025-06 |
| Institute for Shipboard Education | 501(c)(3) | 1977 | $44.3 million | $55.5 million | 2025-05 |
| Ridgeview Classical Schools | 501(c)(3) | 2001 | $12.8 million | $14.6 million | 2025-06 |
| Axis International Academy | 501(c)(3) | 2019 | $5.2 million | $4.3 million | 2025-06 |
| Mountain Sage Community School | 501(c)(3) | 2012 | $4.9 million | $5.6 million | 2025-06 |
| Fort Collins Montessori School | 501(c)(3) | 2017 | $4.5 million | $3 million | 2025-06 |
| Northern Colorado Academy of Artsand Knowledge | 501(c)(3) | 2016 | $3.8 million | $2.1 million | 2025-06 |
| The Rivendell School of Northern Colorado | 501(c)(3) | 2004 | $3.2 million | $3.1 million | 2025-08 |
| Heritage Christian Academy | 501(c)(3) | 2009 | $2.5 million | $1.7 million | 2025-07 |
| Teachunited | 501(c)(3) | 2019 | $1.9 million | $814,012 | 2024-12 |
| Global Village International | 501(c)(3) | 2018 | $1.6 million | $1.2 million | 2025-06 |
| Sexual Assault Victim Advocate Center | 501(c)(3) | 2003 | $1.5 million | $1.4 million | 2024-12 |
| Friends of Christian Education Foundation | 501(c)(3) | 2010 | $907,908 | $6.4 million | 2025-07 |
| Esa Foundation | 501(c)(3) | 2025 | $866,096 | $6.4 million | 2025-12 |
| Harmony School Christian Early Childhood Center | 501(c)(3) | 1997 | $799,026 | $290,859 | 2025-05 |
| Esa Membership Corporation | 501(c)(4) | 2009 | $647,085 | $179,961 | 2025-12 |
| Phi Delta Theta Fraternity | 501(c)(7) | 1940 | $596,999 | $29,874 | 2026-05 |
| Front Range Learning Center | 501(c)(3) | 2025 | $572,492 | $225,977 | 2025-06 |
| Restorative Justice Education | 501(c)(3) | 2014 | $564,071 | $59,094 | 2025-12 |
| Christian Core Academy Fort Collins | 501(c)(3) | 2017 | $547,107 | $1.8 million | 2025-06 |
| Masonry Society | 501(c)(3) | 1995 | $494,924 | $1.3 million | 2025-12 |
| RCS Building Corporation | 501(c)(3) | 2024 | $491,929 | $3.4 million | 2025-06 |
| Psychedelic Research and Training Institute | 501(c)(3) | 2023 | $449,479 | $242,683 | 2025-12 |
| Fort Collins Breakfast Rotary Charitable Foundation | 501(c)(3) | 1995 | $418,750 | $789,200 | 2025-06 |
| Colorado Longitudinal Study | 501(c)(3) | 2017 | $400,058 | $56,333 | 2025-12 |
| Neaera Robotics Inc | 501(c)(3) | 2012 | $380,033 | $277,983 | 2025-12 |
| Global Leaders Inc | 501(c)(3) | 2013 | $359,964 | $74,710 | 2025-12 |
| Nowak Society | 501(c)(3) | 2017 | $326,952 | $114,218 | 2025-12 |
| Poudre School District Foundation Inc | 501(c)(3) | 2000 | $312,385 | $3 million | 2025-06 |
| Goabroad Foundation | 501(c)(3) | 2003 | $284,558 | $46,008 | 2025-12 |
| Olive Tree Inc | 501(c)(3) | 2007 | $279,027 | $38,601 | 2025-07 |
| Tylers Backcountry Awareness | 501(c)(3) | 2014 | $240,128 | $179,294 | 2024-12 |
| Northern Colorado Alliance for A Livable Future | 501(c)(3) | 2021 | $132,310 | $96,266 | 2025-12 |
| Lightning Choice Youth Outreach | 501(c)(3) | 2015 | $130,818 | $35,873 | 2024-12 |
| Fossil Ridge Band Boosters | 501(c)(3) | 2023 | $128,903 | $63,941 | 2025-08 |
| Rocky Mountain Sustainable Living Association | 501(c)(3) | 2003 | $122,850 | $67,627 | 2024-12 |
| Veterans Plaza of Northern Colorado | 501(c)(3) | 2013 | $102,062 | $40,982 | 2024-12 |
| Bacon Elementary Pto | 501(c)(3) | 2020 | $85,689 | $107,432 | 2025-06 |
| Thefiveeleven | 501(c)(3) | 2021 | $81,111 | $22,054 | 2024-12 |
| Vet Supply and Text Inc | 501(c)(3) | 1978 | $79,253 | $58,809 | 2025-07 |
| Phi Gamma Delta Fraternity | 501(c)(7) | 2023 | $78,909 | $78,909 | 2024-12 |
| Quarter Project of Northern Colorado | 501(c)(3) | 2018 | $75,194 | $73,298 | 2024-12 |
| Bridge Inc | 501(c)(3) | 2019 | $72,081 | $19,757 | 2025-12 |
| Riffenburgh Elementary Parent Teacher Organization | 501(c)(3) | 2022 | $66,547 | $74,948 | 2025-12 |
| Shepardson Parent Teacher Organization | 501(c)(3) | 1987 | $58,328 | $30,144 | 2025-06 |
| Laurel Elementary Pto | 501(c)(3) | 2022 | $48,932 | $9,765 | 2025-07 |
| Kruse Elementary Pto | 501(c)(3) | 1995 | $48,606 | $48,997 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $43,207 | $15,906 | 2025-06 |
| Core Knowledge Charter School Foundation | 501(c)(3) | 1998 | $27,980 | $502,273 | 2025-06 |
| Readability Matters | 501(c)(3) | 2020 | $20,412 | $141,961 | 2024-12 |
| Aikido of Northern Colorado Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Alpha Sigma Phi Fraternity Inc | 501(c)(7) | 1941 | $0 | $0 | 2025-06 |
| Alpha Tau Omega Fraternity | 501(c)(7) | 2021 | $0 | $0 | 2025-12 |
| American Association of University Women | 501(c)(4) | 2010 | $0 | $0 | 2026-06 |
| Article 26 Foundation | 501(c)(3) | 2024 | | | |
| Ask Charitable Inc | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Bauder Elementary School Pto | 501(c)(3) | 2000 | $0 | $0 | 2024-07 |
| Bennett Community Organization | 501(c)(3) | 2022 | $0 | $0 | 2025-04 |
| Birnadine Mack Scholarship Fund | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Blevins Middle School Pto | 501(c)(3) | 2021 | $0 | $0 | 2026-06 |
| Character in Athletics Inc | 501(c)(3) | 2010 | $0 | $0 | 2023-12 |
| Colorado Center for Jung and Nature Studies | 501(c)(3) | 2024 | $0 | $0 | 2026-03 |
| Colorado Cinderella Scholarship Pageant | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Colorado Odyssey Inc | 501(c)(3) | 2002 | $0 | $0 | 2025-06 |
| Craig Stevens Equestrian Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Csu Student Chapter of the American Assoc of Bovine Practitioners | 501(c)(3) | 2016 | $0 | $0 | 2025-06 |
| Cyrus Foundation Community Development Corporation | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Delta Xi Nu Multicultural Sorority Inc | 501(c)(7) | 2007 | $0 | $0 | 2023-12 |
| Den Donors Student Organization | 501(c)(3) | 2025 | $0 | $0 | 2025-05 |
| Do Good Group Inc | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Education Skills Institute | 501(c)(3) | 2007 | $0 | $0 | 2024-12 |
| Edventures NFP | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Engineering Brightness | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| FCHS Lambkin Gridiron Boosters | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| First Team 159 Alpine Robotics | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Foothills Childbirth Education Association | 501(c)(3) | 2021 | $0 | $0 | 2026-04 |
| Fort Collins Area Alumnae Panhellenic Council | 501(c)(3) | 2003 | $0 | $0 | 2025-08 |
| Fort Collins High School Fifty-Year Alumni Association | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Fort Collins Read-Aloud | 501(c)(3) | 1991 | $0 | $0 | 2023-12 |
| Fort Collins Reads | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Foundation for Digital Asset Risk Inc | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Handwork Initiative | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Headyconnection | 501(c)(3) | 2026 | | | |
| Heritage Enrichment Program | 501(c)(3) | 2026 | | | |
| Ibm Ring 250 Presto-Digitators | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Irish Elementary Escuela Bilingue Padres En Accion Pto | 501(c)(3) | 2021 | $0 | $0 | 2025-06 |
| Johnson Parent Teacher Organization | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| Kickstart Self-Defense | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Korean School of Fort Collins | 501(c)(3) | 2017 | $0 | $0 | 2026-06 |
| Kristi Visocky Memorial Foundation | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| LGBTQ Communication Sciences and Disorders Student Association Inc | 501(c)(3) | 2021 | $0 | $0 | 2026-06 |
| Life Evolution 360 | 501(c)(3) | 2025 | | | |
| Lincoln Middle School Pto | 501(c)(3) | 2013 | $0 | $0 | 2026-07 |
| Linton Elementary Parent Teacher Organization | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Living in Synergy Inc | 501(c)(3) | 2026 | | | |
| Mainn Fund | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| McGraw Elementary Parent Teacher Student Organization | 501(c)(3) | 2002 | $0 | $0 | 2025-07 |
| Music Business Collective | 501(c)(3) | 2022 | $0 | $0 | 2026-03 |
| National Junior Tennis and Learning of Fort Collins | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| North Park Foundation | 501(c)(3) | 1994 | $0 | $0 | 2025-12 |
| Northern Colorado Doula Association | 501(c)(3) | 2018 | $0 | $0 | 2023-12 |
| Northern Colorado Equality | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Olander Elementary Parent Teacher Organization Pto | 501(c)(3) | 2026 | | | |
| Paideia Classical Community | 501(c)(3) | 2026 | | | |
| Paws for Tales | 501(c)(3) | 2023 | | $823 | 2025-12 |
| Pinnacle Corporation | 501(c)(3) | 2023 | $0 | $0 | 2026-07 |
| Poudre Global Academy Pto | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Poudre High School Cheerleading Booster Club | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Protect Our Kids | 501(c)(3) | 2026 | | | |
| Pta Colorado Congress | 501(c)(3) | 1946 | $0 | $0 | 2026-06 |
| Qest Association Inc | 501(c)(3) | 2022 | $0 | $0 | 2025-06 |
| RMHS Boys Basketball Booster Club | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| RMHS Girls Volleyball Booster Club | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Real Property Asset Association | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Reforma Colorado Chapter | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Rhea Classical Reviews LLC | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| Ridgeview Classical Schools Institute | 501(c)(3) | 2009 | $0 | $23,114 | 2024-12 |
| Rocky Mountain Association for Educator Preparation | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Rocky Mountain High School Dance Team Booster Club | 501(c)(3) | 2025 | | | |
| Rocky Mountain High School Unified Sports Booster Club | 501(c)(3) | 2025 | | | |
| Rocky Mountain Science & Sustainability Network | 501(c)(3) | 2015 | $0 | $0 | 2024-06 |
| Rodney Washburn Scholarship Foundation | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Scott Free Trades Company | 501(c)(3) | 2026 | | | |
| Serimus Operating Foundation | 501(c)(3) | 2003 | | $19,026 | 2024-12 |
| Sigma Nu Fraternity | 501(c)(7) | 1940 | $0 | $0 | 2025-12 |
| Singing and Theatre at Ridge Booster Club | 501(c)(3) | 2018 | $0 | $0 | 2024-06 |
| Skamania School Pto | 501(c)(3) | 2018 | $0 | $0 | 2025-09 |
| Society for Veterinary Soft Tissue Surgery | 501(c)(3) | 2003 | $0 | $0 | 2025-06 |
| Tapovan - Paths To One Spirit | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Tavelli Parent Teacher Organization | 501(c)(3) | 2011 | $0 | $0 | 2025-08 |
| Taylor Landstrom | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| The Learning House Foundation for Early Childhood Development | 501(c)(3) | 2001 | $0 | $0 | 2024-06 |
| The Sustainable Development Institute | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Vipra Foundation International Inc | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Wac Clearinghouse | 501(c)(3) | 2024 | | | |
| Young Advocates Colorado | 501(c)(3) | 2023 | $0 | $1 | 2023-12 |
| Zonta Club of Fort Collins Foundation | 501(c)(3) | 2014 | $0 | $0 | 2025-05 |
| Zoological Medicine Society | 501(c)(3) | 2015 | | $8,672 | 2024-05 |