| 1 | The Aspen Institute INC Washington | $666.6M | $443.8M | $756.6M |
| 2 | Brookings Institution Washington | $212.1M | $109.0M | $551.0M |
| 3 | Urban Institute Washington | $176.5M | $129.6M | $311.6M |
| 4 | American Enterprise Institute for Public Policy Research Washington | $104.8M | $68.0M | $353.1M |
| 5 | Woodrow Wilson International Center for Scholars Washington | $48.1M | $30.4M | $75.6M |
| 6 | Pew Research Center Washington | $46.7M | $46.7M | $54.2M |
| 7 | The Center for Employment Security Education and Research INC Washington | $45.8M | $45.8M | $11.5M |
| 8 | Becket Fund Washington | $36.0M | $18.8M | $33.4M |
| 9 | Uli Foundation Washington | $31.5M | $12.5M | $93.1M |
| 10 | Peter G Peterson Institute for International Economics Washington | $27.3M | $14.8M | $99.3M |
| 11 | Population Connection Washington | $24.8M | $17.0M | $40.1M |
| 12 | Salzburg Global Seminar INC Washington | $16.7M | $16.5M | $37.4M |
| 13 | American Sociological Association Washington | $15.7M | $8.4M | $17.4M |
| 14 | Population Reference Bureau INC Washington | $13.7M | $11.7M | $14.5M |
| 15 | Behavioral Ideas Lab INC Washington | $12.6M | $11.0M | $21.1M |
| 16 | Economic Policy Institute Washington | $12.2M | $11.9M | $19.6M |
| 17 | Washington Center for Equitable Growth INC Washington | $12.0M | $12.0M | $12.8M |
| 18 | American Political Science Association Washington | $11.3M | $9.1M | $63.0M |
| 19 | American Psychological Foundation INC Washington | $9.3M | $9.2M | $33.9M |
| 20 | Institute for Higher Education Policy Washington | $8.9M | $8.9M | $15.8M |
| 21 | Society for Research in Child Development Washington | $5.9M | $3.6M | $19.8M |
| 22 | Center for European Policy Analysis Washington | $5.1M | $5.1M | $3.9M |
| 23 | The Institute for Financial Markets Washington | $4.4M | $0 | $4.4M |
| 24 | American Action Forum INC Washington | $4.0M | $4.0M | $2.3M |
| 25 | Better Markets INC Washington | $3.9M | $3.9M | $3.7M |
| 26 | Coalition for a Prosperous America INC Washington | $3.6M | $3.6M | $1.5M |
| 27 | Association of American Geographers Washington | $3.5M | $2.4M | $13.4M |
| 28 | Joint Center for Political and Economic Studies INC Washington | $3.4M | $3.4M | $11.5M |
| 29 | Council on Governmental Relations Washington | $3.3M | $3.3M | $4.9M |
| 30 | Native American Finance Officers Association INC Washington | $3.1M | $3.1M | $2.2M |
| 31 | Foundation for Chemistry Research and Initiatives Washington | $3.0M | $3.0M | $4.6M |
| 32 | Synergia - Initiatives for Human Rights Washington | $3.0M | $3.0M | $2.5M |
| 33 | American Institute for Boys and Men Washington | $2.9M | $2.9M | $1.9M |
| 34 | Actionaid USA Washington | $2.8M | $2.7M | $3.9M |
| 35 | Economic Policy Innovation Center INC Washington | $2.7M | $2.7M | $1.6M |
| 36 | Joseph Rainey Center for Public Policy Incorporated Washington | $2.6M | $2.6M | $968K |
| 37 | Washington Monthly Institute INC Washington | $2.1M | $2.1M | $2.1M |
| 38 | American Anti Trust Institute INC Washington | $1.9M | $916K | $2.3M |
| 39 | Gulf International Forum INC Washington | $1.7M | $1.7M | $899K |
| 40 | Poverty and Race Research Action Council Washington | $1.6M | $1.6M | $2.7M |
| 41 | School Justice Project INC Washington | $1.6M | $1.6M | $2.1M |
| 42 | Our Neighborhoods Capital Fund Washington | $1.6M | $1.6M | $1.5M |
| 43 | Globewomen Research & Education Institute Washington | $1.5M | $1.5M | $4.7M |
| 44 | Association for Clinical and Translational Science Washington | $1.5M | $1.5M | $1.9M |
| 45 | Community Cooperative Washington | $1.4M | $1.4M | $750K |
| 46 | Coalition for a Prosperous America Education Fund Washington | $1.3M | $1.2M | $315K |
| 47 | American Institute for Contemporary German Studies John Hopkins University Washington | $1.2M | $1.2M | $6.0M |
| 48 | Advocates for Community Alternatives INC Washington | $1.2M | $1.2M | $2.1M |
| 49 | Social Progess Imperative INC Washington | $1.1M | $1.1M | $172K |
| 50 | Institute for Progress Washington | $1.1M | $1.1M | $3.9M |