| THE ASPEN INSTITUTE INC | $443,841,184 | V20 | published | launch: launch | Washington, DC | 2024 |
| AMERICAN INSTITUTES FOR RESEARCH IN THE BEHAVIORAL SCIENCES | $437,187,471 | V23 | published | abuse: substance | Arlington, VA | 2024 |
| NATIONAL OPINION RESEARCH CENTER | $397,190,163 | V20 | published | science: research education | Chicago, IL | 2024 |
| THE MILKEN INSTITUTE | $388,976,676 | V20 | inferred 0.60 | | Santa Monica, CA | 2024 |
| AMERICAN PSYCHOLOGICAL ASSOCIATION | $146,276,253 | V03 | published | violence: prevention | Washington, DC | 2024 |
| URBAN INSTITUTE | $129,592,450 | V34 | published | science: research education | Washington, DC | 2024 |
| ITHAKA HARBORS INC | $125,968,256 | V30 | published | | New York, NY | 2024 |
| BROOKINGS INSTITUTION | $115,659,701 | V22 | published | launch: launch | Washington, DC | 2024 |
| AIRPORT RESEARCH AND DEVELOPMENT FOUNDATION | $100,567,015 | V26 | inferred 0.45 | science: research education | Alexandria, VA | 2024 |
| PENNSYLVANIA STATE EDUCATION ASSOCIATION P S E A | $85,684,519 | V01 | inferred 0.50 | science: research education | Harrisburg, PA | 2024 |
| ALZHEIMERS DRUG DISCOVERY FOUNDATION | $82,162,763 | V36 | published | science: research education | New York, NY | 2025 |
| AMERICAN ENTERPRISE INSTITUTE FOR PUBLIC POLICY RESEARCH | $75,372,309 | V05 | published | | Washington, DC | 2024 |
| HUMAN RESOURCES RESEARCH ORGANIZATION | $69,540,238 | V23 | published | science: research education | Alexandria, VA | 2024 |
| BUCK INSTITUTE FOR RESEARCH ON AGING | $57,241,648 | V99 | published | science: research education | Novato, CA | 2024 |
| CIVIL-MILITARY INNOVATION INSTITUTE INC | $55,352,924 | V05 | published | | Morgantown, WV | 2024 |
| CONSORTIUM FOR COMMAND CONTROL | $54,118,186 | V01 | inferred 0.50 | science: research education | Washington, DC | 2016 |
| INNOVATIONS FOR POVERTY ACTION | $52,795,464 | V30 | published | launch: launch | Washington, DC | 2024 |
| THE CENTER FOR EMPLOYMENT SECURITY EDUCATION AND RESEARCH INC | $49,377,329 | V37 | published | | Washington, DC | 2024 |
| MERCATUS CENTER INC | $48,287,301 | V22 | published | science: research education | Arlington, VA | 2024 |
| FAMILY INSTITUTE | $47,147,907 | V23 | inferred 0.45 | | Evanston, IL | 2024 |
| NATIONAL BUREAU OF ECONOMIC RESEARCH INC | $46,995,418 | V22 | published | science: research education | Cambridge, MA | 2024 |
| RUSSELL SAGE FOUNDATION | $46,830,494 | V05 | inferred 0.85 | men: issues | New York, NY | 2024 |
| PEW RESEARCH CENTER | $46,263,769 | V05 | published | space: outer | Washington, DC | 2024 |
| GLOBAL POVERTY PROJECT INC | $45,061,129 | V30 | published | women: issues | New York, NY | 2024 |
| RSF SOCIAL FINANCE INC | $40,993,452 | V21 | published | shelter: disaster | San Francisco, CA | 2024 |
| AFRICAN POPULATION HEALTH & RESEARCH CENTER INC | $39,510,486 | V35 | published | science: research education | Baltimore, MD | 2024 |
| WOODROW WILSON INTERNATIONAL CENTER FOR SCHOLARS | $30,377,522 | V35 | published | science: research education | Washington, DC | 2023 |
| ATLAS ECONOMIC RESEARCH FOUNDATION | $28,834,435 | V22 | published | | Arlington, VA | 2025 |
| ESALEN INSTITUTE | $22,438,038 | V23 | published | | San Francisco, CA | 2024 |
| MEMORIAL HERMANN COMMUNITY BENEFIT CORPORATION | $20,400,729 | V23 | published | launch: aviation | Houston, TX | 2024 |
| INSTITUTE FOR OPERATIONS RESEARCH AND THE MANAGEMENT SCIENCES | $19,741,544 | V22 | published | science: research education | Catonsville, MD | 2025 |
| CPWR THE CENTER FOR CONSTRUCTION RESEARCH AND TRAINING | $18,723,168 | V99 | published | | Silver Spring, MD | 2024 |
| GREAT LAKES BEHAVIORAL RESEARCH INSTITUTE | $18,400,471 | V05 | inferred 0.60 | domestic violence | Cranberry Twp, PA | 2024 |
| HUMAN SERVICES RESEARCH INSTITUTE INC | $18,023,780 | V20 | published | abuse: substance | Cambridge, MA | 2024 |
| LAUREATE INSTITUTE FOR BRAIN RESEARCH INC | $17,878,231 | V23 | published | science: research education | Tulsa, OK | 2024 |
| GLOBAL FUND FOR A NEW ECONOMY INC | $17,875,325 | V05 | published | | Alameda, CA | 2025 |
| PETER G PETERSON INSTITUTE FOR INTERNATIONAL ECONOMICS | $17,773,572 | V03 | published | | Washington, DC | 2024 |
| People-Centered Research Foundation | $17,764,685 | V05 | inferred 0.50 | | Washington, DC | 2019 |
| BECKET FUND | $17,543,941 | V24 | published | science: christian science | Washington, DC | 2024 |
| ECONOMIC POLICY INSTITUTE | $17,421,520 | V22 | published | | Washington, DC | 2025 |
| POPULATION CONNECTION | $17,044,460 | V25 | published | violence: sexual | Washington, DC | 2024 |
| SALZBURG GLOBAL SEMINAR INC | $16,474,201 | V20 | published | | Washington, DC | 2024 |
| AMERICAN ACADEMY OF ACTUARIES | $16,165,925 | V03 | inferred 0.90 | science: research education | Washington, DC | 2024 |
| IMAGINE NORTH CAROLINA FIRST | $16,133,945 | V22 | published | | Raleigh, NC | 2024 |
| DISABLED AMERICAN VETERANS NATIONAL SERVICE FOUNDATION | $15,816,817 | V01 | inferred 0.50 | | Erlanger, KY | 2025 |
| OUT & EQUAL | $14,576,507 | V30 | published | | Oakland, CA | 2024 |
| AMERICAN ECONOMIC ASSOCIATION INC | $14,309,259 | V03 | published | science: research education | Nashville, TN | 2024 |
| SOCIAL SCIENCE RESEARCH COUNCIL | $14,237,307 | V20 | published | science: research education | New York, NY | 2024 |
| NEXTCORPS INC | $13,201,479 | V20 | published | science: research education | Rochester, NY | 2024 |
| AMERICAN INSTITUTE FOR ECONOMIC RESEARCH INC | $13,156,984 | V22 | published | science: research education | Gt Barrington, MA | 2025 |
| CENTER FOR APPLIED RESEARCH SOLUTIONS INC | $12,775,813 | V05 | published | abuse: substance | Santa Rosa, CA | 2024 |
| GERONTOLOGICAL SOCIETY OF AMERICA | $12,696,945 | V36 | inferred 0.70 | science: research education | Washington, DC | 2025 |
| WELFARE RESEARCH INC | $12,259,419 | V05 | inferred 0.60 | | Albany, NY | 2025 |
| WASHINGTON CENTER FOR EQUITABLE GROWTH INC | $11,966,024 | V22 | published | abuse: substance | Washington, DC | 2024 |
| PEDIATRIC NURSING CERTIFICATION BOARD INC | $11,601,840 | V03 | inferred 0.60 | | Rockville, MD | 2024 |
| ULI FOUNDATION | $11,489,240 | V34 | published | | Washington, DC | 2024 |
| INSTITUTE FOR FAMILY DEVELOPMENT | $11,487,721 | V23 | published | | Federal Way, WA | 2024 |
| POPULATION REFERENCE BUREAU INC | $11,420,688 | V25 | published | domestic: workers | Washington, DC | 2024 |
| WENNER-GREN FOUNDATION FOR ANTHROPOLOGICAL RESEARCH INC | $11,419,151 | V20 | inferred 0.55 | violence: sexual | New York, NY | 2024 |
| GRUPO NEXOS INC | $11,360,792 | V05 | published | | San Juan, PR | 2024 |
| MIDWESTERN HIGHER EDUCATION COMMISSION | $11,146,961 | V20 | published | | Minneapolis, MN | 2024 |
| BEHAVIORAL IDEAS LAB INC | $10,958,819 | V20 | published | violence: sexual | Washington, DC | 2024 |
| JUST CAPITAL FOUNDATION INC | $10,953,584 | V20 | published | launch: launch | New York, NY | 2025 |
| FRASER INSTITUTE | $10,481,818 | V24 | inferred 0.50 | | Canada | 2025 |
| AMERICAN ACADEMY OF ARTS AND SCIENCES | $10,404,572 | V30 | published | science: research education | Cambridge, MA | 2024 |
| THE RISK MANAGEMENT ASSOCIATION | $9,942,725 | V03 | inferred 0.60 | | Philadelphia, PA | 2023 |
| AMERICAS TURNING POINT INC | $9,772,457 | V22 | published | | Indianapolis, IN | 2024 |
| ASSOCIATION OF THE BAR OF THE CITY OF NEW YORK FUND INC | $9,732,777 | V26 | published | abuse: substance | New York, NY | 2024 |
| AMERICAN FEDERATION FOR AGING | $9,687,847 | V36 | published | science: research education | New York, NY | 2025 |
| MANNHEIMER FOUNDATION INC | $9,421,176 | V23 | inferred 0.60 | | Homestead, FL | 2025 |
| NATIONAL INSTITUTE FOR TRIAL ADVOCACY | $9,296,481 | V26 | published | | Louisville, CO | 2025 |
| THE NARBHA INSTITUTE | $9,120,552 | V23 | published | | Flagstaff, AZ | 2024 |
| AMERICAN POLITICAL SCIENCE ASSOCIATION | $9,087,562 | V24 | published | science: research education | Washington, DC | 2024 |
| INSTITUTE FOR HIGHER EDUCATION POLICY | $8,861,160 | V20 | published | women: issues | Washington, DC | 2024 |
| OSLC DEVELOPMENTS INC | $8,793,457 | V11 | published | abuse: substance | Eugene, OR | 2024 |
| SCHOOL FOR ADVANCED RESEARCH | $8,784,057 | V21 | published | | Santa Fe, NM | 2024 |
| INSTITUTE FOR CHILD SUCCESS INC | $8,439,712 | V23 | published | abuse: child | Greenville, SC | 2024 |
| AMERICAN SOCIOLOGICAL ASSOCIATION | $8,363,810 | V21 | published | science: research education | Washington, DC | 2024 |
| THE NATIONAL ASSOCIATION OF STATE ENERGY OFFICIALS | $8,222,494 | V24 | inferred 0.50 | | Arlington, VA | 2024 |
| OREGON RESEARCH INSTITUTE | $7,759,740 | V23 | published | abuse: substance | Springfield, OR | 2024 |
| UNITED STATES GEOSPATIAL INTELLIGENCE FOUNDATION | $7,559,866 | V20 | published | | Herndon, VA | 2024 |
| INTERNATIONAL SOCIETY FOR CELLULAR THERAPY | $7,494,736 | V23 | inferred 0.45 | science: research education | Canada | 2024 |
| COMMON JUSTICE | $7,405,997 | V26 | published | violence: community | Brooklyn, NY | 2024 |
| SOCIETY FOR RESEARCH IN CHILD DEVELOPMENT | $7,370,322 | V23 | published | science: research education | Washington, DC | 2024 |
| AMERICAN INSTITUTE FOR BOYS AND MEN | $7,359,980 | V05 | published | men: issues | Washington, DC | 2024 |
| ITS MY COMMUNITY INITIATIVE | $7,338,020 | V99 | published | abuse: child | Oklahoma City, OK | 2024 |
| AMERICAN CONSERVATIVE UNION FOUNDATION | $7,147,796 | V05 | published | | Alexandria, VA | 2024 |
| ALASKA COUNCIL OF SCHOOL ADMINISTRATORS | $7,126,010 | V05 | inferred 0.50 | | Juneau, AK | 2024 |
| COUNCIL FOR ECONOMIC EDUCATION | $6,919,375 | V22 | published | girls boys: girls | New York, NY | 2024 |
| ASSOCIATION OF AMERICAN GEOGRAPHERS | $6,775,219 | V25 | published | science: research education | Washington, DC | 2025 |
| FOUNDATION FOR ECONOMIC EDUCATION INC | $6,742,440 | V22 | published | science: research education | Atlanta, GA | 2024 |
| SECURED FINANCE NETWORK INC | $6,607,481 | V22 | published | | New York, NY | 2024 |
| INSTITUTE FOR CHILD OUTCOMES INC | $6,522,431 | V05 | inferred 0.85 | science: research education | Framingham, MA | 2017 |
| INDEPENDENT INSTITUTE | $6,514,941 | V24 | inferred 0.50 | | Oakland, CA | 2024 |
| DEMOCRATIC SOCIALISTS OF AMERICA INC | $6,386,022 | V24 | published | | New York, NY | 2024 |
| MORNING STAR FOUNDATION | $6,176,347 | V05 | published | | Woodland, CA | 2024 |
| AMERICAN ANTHROPOLOGICAL ASSOCIATION | $6,107,366 | V21 | published | science: research education | Arlington, VA | 2025 |
| SAN DIEGO VOLUNTEER LAWYER PROGRAM INC | $5,886,804 | V26 | published | abuse: elder | San Diego, CA | 2024 |
| INTERCULTURAL DEVELOPMENT RESEARCH ASSOCIATION | $5,810,076 | V30 | published | science: research education | San Antonio, TX | 2024 |
| ECONOMIC CLUB OF NEW YORK | $5,752,282 | V22 | published | | New York, NY | 2025 |