| Umuc Ventures Inc | 501(c)(3) | 2016 | $51 million | $43.6 million | 2025-06 |
| Foundation for Advanced Education in the Sciences Inc | 501(c)(3) | 1964 | $49.4 million | $74.2 million | 2025-05 |
| Holton-Arms School Inc | 501(c)(3) | 1934 | $47.4 million | $152.2 million | 2025-06 |
| Landon School Corporation | 501(c)(3) | 1940 | $47.2 million | $161.5 million | 2025-06 |
| Management Leadership for Tomorrow | 501(c)(3) | 1992 | $41.9 million | $43.2 million | 2024-12 |
| Norwood School Inc | 501(c)(3) | 1968 | $28.7 million | $77.3 million | 2025-06 |
| American Association of Colleges of Osteopathic Medicine | 501(c)(3) | 1972 | $25.3 million | $63.2 million | 2025-06 |
| Washington Episcopal Day School Inc | 501(c)(3) | 1986 | $17.3 million | $45 million | 2025-06 |
| Mater Dei School Inc | 501(c)(3) | 1970 | $11.9 million | $47.4 million | 2025-06 |
| Washington Waldorf School Inc | 501(c)(3) | 1969 | $10.3 million | $18.1 million | 2025-06 |
| Orcid Inc | 501(c)(3) | 2013 | $6.8 million | $7.7 million | 2025-12 |
| Diener School Inc | 501(c)(3) | 2007 | $5.3 million | $24.4 million | 2025-06 |
| 5in5 Foundation | 501(c)(3) | 2025 | $2 million | $0 | 2025-12 |
| Collegiate Directions Incorporated | 501(c)(3) | 2006 | $1.9 million | $2 million | 2024-12 |
| L Enfant Education Association Inc | 501(c)(3) | 2022 | $1.4 million | $417,004 | 2024-12 |
| Friends of Aas Foundation | 501(c)(3) | 2020 | $1.1 million | $29.9 million | 2024-12 |
| We Need Diverse Books | 501(c)(3) | 2015 | $1 million | $2.4 million | 2025-06 |
| Tuition Exchange Inc | 501(c)(3) | 1994 | $875,089 | $1.6 million | 2025-06 |
| Skill Will Inc | 501(c)(3) | 2013 | $695,773 | $1.4 million | 2024-12 |
| Bethesda Community School Inc | 501(c)(3) | 1957 | $648,969 | $415,174 | 2025-08 |
| Bannockburn Nursery School Inc | 501(c)(3) | 1976 | $627,356 | $460,665 | 2025-06 |
| Glenbrook Nursery School Inc | 501(c)(3) | 1951 | $555,239 | $730,977 | 2025-06 |
| African American Federal Executives Association Incorporated | 501(c)(3) | 2009 | $424,583 | $508,977 | 2024-12 |
| Bethesda Dutch After School Program | 501(c)(3) | 2009 | $338,578 | $314,345 | 2025-06 |
| Village Edu Company | 501(c)(3) | 2025 | $298,094 | $422,973 | 2025-12 |
| Ullico Foundation | 501(c)(3) | 2021 | $293,311 | $1.7 million | 2025-12 |
| Suburban Nursery School Inc | 501(c)(3) | 1973 | $279,058 | $428,183 | 2025-06 |
| New Washington School of Psychiatry | 501(c)(3) | 2023 | $212,664 | $260,113 | 2025-12 |
| Interplay Orchestra Inc | 501(c)(3) | 1986 | $208,770 | $345,338 | 2025-12 |
| Friends of National Library of Medicine | 501(c)(3) | 1985 | $201,617 | $134,444 | 2025-12 |
| The Expo | 501(c)(3) | 2000 | $194,550 | $83,855 | 2025-12 |
| FFG Cares | 501(c)(3) | 2024 | $167,546 | $3,875 | 2025-12 |
| American Friends of the Munich Security Conference | 501(c)(3) | 2022 | $160,000 | $115,642 | 2024-12 |
| Partnership for Responsible Growth Inc | 501(c)(3) | 2014 | $139,142 | $170,108 | 2025-12 |
| Walt Whitman High School Parent Teachers Association Inc | 501(c)(3) | 2017 | $126,693 | $114,509 | 2025-06 |
| Homenetmen of Greater Washington Inc | 501(c)(3) | 2011 | $124,024 | $443,419 | 2025-12 |
| Yorktown Institute | 501(c)(3) | 2022 | $120,566 | $249,383 | 2025-12 |
| Bala Mandir USA Corporation | 501(c)(3) | 2023 | $115,875 | $38,024 | 2025-12 |
| Walter Johnson All School Booster Club | 501(c)(3) | 2019 | $112,591 | $151,759 | 2025-06 |
| Tolstoy Education Foundation | 501(c)(3) | 2017 | $105,858 | $1 | 2025-12 |
| Walt Whitman Drama Boosters Inc | 501(c)(3) | 2013 | $102,421 | $28,582 | 2025-06 |
| Bethesda-Chevy Chase High School Boosters Foundation Inc | 501(c)(3) | 2010 | $100,360 | $113,587 | 2025-06 |
| National Collegiate Cancer Foundation | 501(c)(3) | 2009 | $95,633 | $140,055 | 2024-12 |
| Somerset Elementary School Educational Foundation Inc | 501(c)(3) | 1994 | $84,109 | $128,518 | 2025-06 |
| Walt Whitman All Sports Booster Club Inc | 501(c)(3) | 1996 | $83,754 | $189,324 | 2025-06 |
| Bradley Hills Elementary School Pta Inc | 501(c)(3) | 2023 | $66,464 | $71,993 | 2025-06 |
| Fighting Viking Football Family | 501(c)(3) | 2002 | $64,042 | $8,962 | 2026-05 |
| Pta Delaware Congress | 501(c)(3) | 1971 | $55,127 | $25,907 | 2025-06 |
| Teachers Festival Inc | 501(c)(3) | 2024 | $46,341 | $1 | 2024-12 |
| Csahm Adhd Foundation for Educational Services and Services | 501(c)(3) | 2020 | $14,768 | $79,674 | 2025-12 |
| Walter Johnson High School Education Foundation Inc | 501(c)(3) | 2006 | $14,564 | $85,401 | 2024-12 |
| Jahanvi Desai Educational Foundation Inc | 501(c)(3) | 2019 | $5,836 | $207,355 | 2025-12 |
| SG Foundation Inc | 501(c)(3) | 2016 | $500 | $2.6 million | 2025-12 |
| Acacia Leadership Academy Inc | 501(c)(3) | 2026 | | | |
| Advancing Black Lives in Education Inc | 501(c)(3) | 2020 | $0 | $0 | 2023-12 |
| American International School of Bucharest Foundation Inc | 501(c)(3) | 2002 | $0 | $0 | 2026-06 |
| Balance of Power Foundation | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Center for Excellence in Mental Health | 501(c)(3) | 2024 | | | |
| Central Pacific Educational Opportunities | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Chaim Engineering Foundation Inc | 501(c)(3) | 2025 | | | |
| Charles County Public Library Foundation Inc | 501(c)(3) | 2024 | | | |
| Charles E & Shirley S Marshall Char Trust 020100 | 501(c)(3) | 2000 | | $948,879 | 2026-06 |
| Consumer Financial Protection Bureau Alumni Association | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Cosmic Gender Balance Corp | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Devengor Network | 501(c)(3) | 2026 | | | |
| Dexter & Lydia Manley Foundation Incorporated | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Don Allen Candc Music | 501(c)(3) | 2022 | | $1 | 2024-12 |
| Emerging New Urbanists | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Engineering Tomorrow Co | 501(c)(3) | 2015 | | $11.9 million | 2025-08 |
| Faculty Association of the French International School | 501(c)(5) | 2019 | $0 | $0 | 2025-08 |
| Federation of Association of Schools of the Health Professions | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Forthway Center for Advanced Studies Inc | 501(c)(3) | 1970 | $0 | $0 | 2025-12 |
| Foundation for Iranian Studies | 501(c)(3) | 2022 | | $176,277 | 2024-12 |
| Framers Institute Inc | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Friends of Peru LTD | 501(c)(3) | 1991 | $0 | $0 | 2025-12 |
| GSN Honor Society of Sigma Theta Tau International | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Global Coalition for Peace Inc | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Global Garden Public Charter School Incorporated | 501(c)(3) | 2011 | $0 | $0 | 2025-06 |
| Glow Fund Inc | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Greater Washington DC Area Associated Alumnae and Alumni of T | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Green Tech and Wellness Inc | 501(c)(3) | 2025 | | | |
| Hawkins Crew Family Foundation | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Jewish-Islamic Dialogue Society of Washington Inc | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Jos Foundation Inc | 501(c)(3) | 2024 | | $1 | 2024-12 |
| Keru Knowledge Foundation | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Ladies College Alumni of Greater Washington | 501(c)(3) | 2009 | $0 | $0 | 2026-03 |
| Local Governance Foundation Inc | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Local Solutions International Inc | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Mahajan Foundation Inc | 501(c)(3) | 2025 | | | |
| Maharat for Development | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Maryland Geographic Alliance LTD | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| McBrien Group Foundation Inc | 501(c)(3) | 2024 | $0 | $0 | 2025-04 |
| Meditatio Foundation Inc | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Mid-Atlantic Consortium of Physical Therapy Clinical Educatio | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Montgomery County Quiet Skies Coalition LTD | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Mount Vernon Academy Alumni Association Inc | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Necessities Now | 501(c)(3) | 2020 | | $540,171 | 2024-12 |
| North Bethesda Middle School Parent Teacher Organization Inc | 501(c)(3) | 2012 | $0 | $0 | 2024-06 |
| Open Source Phonics Inc | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Parents Association Rochambeau | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| People of America Foundation | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Richard Montgomery High School Magnet Foundation Inc | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Rock Reaching Out With Compassion in Kibera NFP | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Ruth Lorraine White Memorial Scholarship Trust | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| Salvadoran Chamber of Commerce Foundation | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Sandra Lee Heyman Foundation Inc | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Seed & Knowledge Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Seven Locks Elementary School Educational Foundation Inc | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Sisterslivingworks Inc | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Solmanik Inc | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Surety Industry Research Foundation Inc | 501(c)(3) | 2019 | $0 | $42,347 | 2025-12 |
| Teacher Supplies for Kids | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Team 1389 Whitman Robotics Boosters | 501(c)(3) | 2024 | $0 | $0 | 2026-06 |
| The Blue Marble Inc | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Titans Foundation | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Walt Whitman High School Speech & Debate Inc | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Westland Middle School Pta Inc | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| William F and Barbara K Peel Foundation Inc | 501(c)(3) | 2014 | | $1 | 2025-12 |
| Wisdom Oak Center for Gifted Youth | 501(c)(3) | 2024 | | | |
| Wyngate Elementary School Education Foundation Inc | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Yene Lij My Child International Wom En and Children Transformation Min | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Zakat for Education Foundation Inc | 501(c)(3) | 2024 | | $9,124 | 2024-12 |