| Halcyon HouseWashington | Form 990 | $5,566,679FY2024 |
| Business Forward FoundationWashington | Form 990 | $5,495,132FY2024 |
| American Council of Trustees and AlumniWashington | Form 990 | $5,441,599FY2025 |
| Foundation for Art and Preservation in EmbassiesWashington | Form 990 | $5,411,060FY2024 |
| Victims of Communism Memorial Foundation IncWashington | Form 990 | $5,260,712FY2024 |
| American Association of People with DisabilitiesWashington | Form 990 | $4,853,722FY2024 |
| International Womens Media FoundationWashington | Form 990 | $4,718,566FY2024 |
| United States Foundation for the Commemoration of the World WarsWashington | Form 990 | $4,521,137FY2024 |
| Daily Caller News FoundationWashington | Form 990 | $4,489,729FY2024 |
| Society of the CincinnatiWashington | Form 990 | $4,327,705FY2025 |
| National Society of the Colonial Dames of AmericaWashington | Form 990 | $3,865,498FY2025 |
| Herbie Hancock Institute of JazzWashington | Form 990 | $3,863,373FY2024 |
| International Food Information Council FoundationWashington | Form 990 | $3,825,611FY2025 |
| Step Afrika U S A IncorporatedWashington | Form 990 | $3,786,366FY2025 |
| Citydance Productions IncWashington | Form 990 | $3,699,908FY2025 |
| National Womens History MuseumWashington | Form 990 | $3,691,385FY2025 |
| Sitar Arts CenterWashington | Form 990 | $3,673,192FY2025 |
| American Evaluation AssociationWashington | Form 990 | $3,653,440FY2025 |
| Daily Signal InstituteWashington | Form 990 | $3,598,549FY2024 |
| BoardsourceWashington | Form 990 | $3,460,379FY2025 |
| Yunus Emre Foundation IncWashington | Form 990 | $3,377,875FY2025 |
| One Common Unity IncWashington | Form 990 | $3,320,358FY2022 |
| Association of Performing Arts Professionals IncWashington | Form 990 | $3,251,613FY2025 |
| Accuracy in Media IncWashington | Form 990 | $3,188,569FY2024 |
| Asian American Journalists AssociationWashington | Form 990 | $3,167,062FY2024 |
| Alliance for Middle East Peace IncWashington | Form 990 | $3,073,176FY2025 |
| Faith and Politics InstituteWashington | Form 990 | $3,061,803FY2025 |
| House of the Temple Historic Preservation Foundation IncWashington | Form 990 | $3,061,389FY2025 |
| Society for American ArchaeologyWashington | Form 990 | $3,036,641FY2025 |
| Mosaic Theater Company of DCWashington | Form 990 | $3,001,907FY2025 |
| American Prospect IncWashington | Form 990 | $2,986,533FY2025 |
| Cultural Development Corporation of the District of ColumbiaWashington | Form 990 | $2,969,379FY2025 |
| District BridgesWashington | Form 990 | $2,926,677FY2025 |
| Lillian & Albert Small Capital Jewish Museum IncWashington | Form 990 | $2,845,409FY2024 |
| Due Process of Law FoundationWashington | Form 990 | $2,836,501FY2024 |
| Encore Creativity Corporation Encore Creativity for Older AdultsWashington | Form 990 | $2,827,285FY2025 |
| Society of Environmental JournalistsWashington | Form 990 | $2,789,577FY2024 |
| Atlas Performing Arts CenterWashington | Form 990 | $2,781,139FY2025 |
| United States Capitol Historical SocietyWashington | Form 990 | $2,725,821FY2025 |
| National Conference of State Historic Preservation OfficersWashington | Form 990 | $2,665,635FY2025 |
| National Association of Broadcasters Leadership FoundationWashington | Form 990 | $2,636,267FY2024 |
| Senior Living Foundation of the American Foreign Service IncWashington | Form 990 | $2,597,825FY2025 |
| The National Theatre FoundationWashington | Form 990 | $2,575,362FY2025 |
| Avalon Theatre Project IncWashington | Form 990 | $2,573,533FY2025 |
| JMG Productions IncWashington | Form 990 | $2,495,505FY2023 |
| Council of Korean Americans IncWashington | Form 990 | $2,468,629FY2025 |
| Open Campus Media IncWashington | Form 990 | $2,463,790FY2024 |
| International Churchill SocietyWashington | Form 990 | $2,454,859FY2024 |
| African-American Civil War Memorial Freedom FoundationWashington | Form 990 | $2,429,732FY2024 |
| Orchestra of the Americas Group IncWashington | Form 990 | $2,419,890FY2025 |