| MABEL PEW MYRIN TRUST | $71,782,876 | A05 | inferred 0.70 | | Philadelphia, PA | 2024 |
| OPEN TECHNOLOGY FUND | $52,341,441 | A05 | published | | Washington, DC | 2024 |
| NATIONAL MINING ASSOCIATION | $48,121,308 | A05 | inferred 0.60 | | Washington, DC | 2024 |
| PUBLIC POLICY INSTITUTE OF CALIFORNIA | $36,412,109 | A05 | inferred 0.75 | | San Francisco, CA | 2024 |
| GUTTMACHER INSTITUTE INC | $34,342,300 | A05 | inferred 0.80 | science: research education | New York, NY | 2025 |
| NATIONAL GOVERNORS ASSOCIATION CENTER FOR BEST PRACTICES | $15,721,713 | A05 | inferred 0.50 | launch: launch | Washington, DC | 2024 |
| RETIREMENT RESEARCH FOUNDATION | $15,539,039 | A05 | inferred 0.70 | women: issues | Chicago, IL | 2024 |
| MEDIA RESEARCH CENTER INC | $14,573,615 | A05 | published | | Herndon, VA | 2025 |
| CICERO RESEARCH | $13,310,263 | A05 | published | | Austin, TX | 2024 |
| SANFORD LABORATORIES FOR INNOVATIVE MEDICINES | $12,981,159 | A05 | published | science: research education | San Diego, CA | 2025 |
| CONGRESSIONAL HISPANIC CAUCUS INSTITUTE INC | $12,909,414 | A05 | inferred 0.75 | science: research education | Washington, DC | 2024 |
| NATIONAL ASSOCIATION OF COUNTIES RESEARCH FOUNDATION | $11,884,512 | A05 | inferred 0.60 | | Washington, DC | 2024 |
| VERITE INC | $11,821,768 | A05 | published | | Northampton, MA | 2024 |
| NATIONAL PHARMACEUTICAL COUNCIL INC | $10,925,821 | A05 | inferred 0.70 | science: research education | Washington, DC | 2025 |
| NATIONAL COUNCIL FOR STATE AUTHORIZATION RECIPROCITY AGREEMEN | $8,433,292 | A05 | published | | Boulder, CO | 2024 |
| RADIO RESEARCH CONSORTIUM INC | $8,250,429 | A05 | inferred 0.50 | | Oakland, MD | 2024 |
| StudentsFirst Institute | $7,983,141 | A05 | inferred 0.70 | | Valencia, CA | 2015 |
| CENTER FOR EFFECTIVE PUBLIC POLICY | $7,901,452 | A05 | inferred 0.60 | | Kensington, MD | 2025 |
| AMERICAN STUDIES CENTER | $7,657,232 | A05 | inferred 0.55 | | Arlington, VA | 2025 |
| EDWARD ORTON JR CERAMIC FOUNDATION | $7,301,614 | A05 | published | | Westerville, OH | 2024 |
| WAITT INSTITUTE | $7,174,063 | A05 | published | launch: launch | N Sioux City, SD | 2024 |
| Make North Carolina First | $6,090,662 | A05 | inferred 0.45 | | Raleigh, NC | 2024 |
| ANKERBERG THEOLOGICAL RESEARCH INSTITUTE | $5,629,133 | A05 | published | | Chattanooga, TN | 2025 |
| HALCYON HOUSE | $5,566,679 | A05 | published | | Washington, DC | 2024 |
| NATIONAL COFFEE ASSOCIATION OF USA INC | $5,471,912 | A05 | inferred 0.50 | science: research education | New York, NY | 2024 |
| ROCKY WOODS CHARITABLE FOUNDATION | $5,449,983 | A05 | inferred 0.50 | science: research education | Oakley, UT | 2024 |
| UNITE FOR COLORADO | $5,344,052 | A05 | inferred 0.55 | | Denver, CO | 2024 |
| PROMETHEUS | $5,000,000 | A05 | published | | Washington, DC | 2024 |
| PENNSYLVANIA ECONOMY LEAGUE INC | $4,923,382 | A05 | inferred 0.50 | launch: launch | Camp Hill, PA | 2024 |
| NATIONAL BUREAU OF ASIAN RESEARCH | $4,782,625 | A05 | inferred 0.85 | | Seattle, WA | 2024 |
| DEEP FOUNDATIONS INSTITUTE | $4,768,709 | A05 | inferred 0.50 | | Hawthorne, NJ | 2025 |
| WateReuse Research Foundation | $4,687,284 | A05 | inferred 0.80 | | Alexandria, VA | 2015 |
| LIFE SERVICES NETWORK OF ILLINOIS | $4,334,628 | A05 | inferred 0.50 | | Lisle, IL | 2024 |
| PUBLIC POLICY INSTITUTE OF NEW YORK STATE INC | $4,155,235 | A05 | inferred 0.80 | | Albany, NY | 2025 |
| EMPLOYEE BENEFIT RESEARCH INSTITUTE | $4,053,897 | A05 | inferred 0.80 | | Washington, DC | 2024 |
| Great Opportunity Policy Inc | $3,931,073 | A05 | inferred 0.55 | | Alexandria, VA | 2024 |
| THE CONNECTICUT PROJECT ACTION | $3,790,025 | A05 | inferred 0.50 | | New Haven, CT | 2024 |
| PUBLIC AGENDA INC | $3,699,693 | A05 | inferred 0.70 | science: research education | New York, NY | 2024 |
| THE MILLER CENTER FOUNDATION | $3,414,979 | A05 | inferred 0.60 | | Charlottesvle, VA | 2024 |
| GROUNDWORK CENTER FOR RESILIENT COMMUNITIES INC | $3,325,181 | A05 | inferred 0.55 | | Traverse City, MI | 2024 |
| Coloradans for Progress | $3,325,000 | A05 | inferred 0.50 | | Denver, CO | 2024 |
| THE AMERICAN ASSEMBLY | $3,217,603 | A05 | inferred 0.80 | science: research education | New York, NY | 2019 |
| WORLDWATCH INSTITUTE | $3,190,441 | A05 | inferred 0.70 | science: research education | Washington, DC | 2010 |
| PLYMOUTH UNION PUBLIC RESEARCH INC | $3,000,000 | A05 | inferred 0.70 | | Washington, DC | 2024 |
| NATIONAL TAXPAYERS UNION FOUNDATION | $2,896,451 | A05 | inferred 0.50 | | Washington, DC | 2024 |
| AMERICAN COLLEGE OF CLINICAL PHARMACOLOGY | $2,799,207 | A05 | inferred 0.50 | science: research education | Ashburn, VA | 2025 |
| BULLETIN OF THE ATOMIC SCIENTISTS | $2,782,626 | A05 | inferred 0.50 | science: research education | Chicago, IL | 2024 |
| COLORADO CHILDRENS CAMPAIGN INC | $2,688,600 | A05 | inferred 0.50 | | Denver, CO | 2025 |
| HOSPITAL CLINIC HOME CENTER | $2,652,714 | A05 | published | | Brooklyn, NY | 2024 |
| MENTAL HEALTH CORPORATION OF AMERICA INC | $2,415,812 | A05 | inferred 0.55 | | Tallahassee, FL | 2024 |
| NGA RESEARCH AND EDUCATION FOUNDATION | $2,223,205 | A05 | inferred 0.50 | | Washington, DC | 2024 |
| GREATNONPROFITS | $2,215,448 | A05 | published | | Redwood City, CA | 2024 |
| YOUNG VOICES | $2,186,477 | A05 | inferred 0.60 | | Washington, DC | 2024 |
| GOOD INSTITUTE | $2,102,455 | A05 | inferred 0.50 | | El Cerrito, CA | 2024 |
| ACTIVE IMPLEMENTATION RESEARCH NETWORK INC | $2,045,586 | A05 | published | | Albuquerque, NM | 2024 |
| WMC FOUNDATIION INC | $1,965,569 | A05 | inferred 0.50 | | Madison, WI | 2025 |
| CENTER FOR LAW AND POLICY | $1,946,000 | A05 | published | | Washington, DC | 2024 |
| PUBLIC AFFAIRS RESEARCH COUNCIL OF ALABAMA | $1,901,124 | A05 | inferred 0.60 | | Birmingham, AL | 2025 |
| AMERICAN SOCIETY OF CRIMINOLOGY | $1,876,345 | A05 | inferred 0.60 | science: research education | Columbus, OH | 2025 |
| INTERNATIONAL ISOCYANATE INSTITUTE INC | $1,872,543 | A05 | inferred 0.50 | science: research education | Clifton, NJ | 2025 |
| Federal Plebiscite Educational Program Inc | $1,865,000 | A05 | inferred 0.60 | | Washington, DC | 2017 |
| MEDIA IMPACT FUNDERS INC | $1,858,813 | A05 | published | | Philadelphia, PA | 2024 |
| THE AMERICAN CENTER OF RESEARCH INCORPORATED | $1,834,918 | A05 | published | science: research education | Alexandria, VA | 2025 |
| INTERNATIONAL FOUNDATION FOR VALUING IMPACTS INC | $1,812,748 | A05 | inferred 0.60 | | Dover, DE | 2025 |
| INTERMEDIA SURVEY INSTITUTE | $1,748,202 | A05 | inferred 0.70 | science: research education | Washington, DC | 2018 |
| POPULATION ASSOCIATION OF AMERICA INC | $1,642,340 | A05 | inferred 0.70 | science: research education | Alexandria, VA | 2024 |
| ASSOCIATION OF METROPOLITAN | $1,632,522 | A05 | inferred 0.50 | | Washington, DC | 2024 |
| CREATE CA | $1,593,594 | A05 | inferred 0.50 | launch: launch | Pasadena, CA | 2025 |
| LAKE MICHIGAN AIR DIRECTOR CORSORTIUM | $1,550,539 | A05 | inferred 0.50 | | Hillside, IL | 2024 |
| LAW AND SOCIETY ASSOCIATION | $1,447,644 | A05 | published | science: research education | Amherst, MA | 2024 |
| INDUSTRIAL AREAS FOUNDATION | $1,401,825 | A05 | inferred 0.60 | | Chicago, IL | 2024 |
| ADC RESEARCH INSTITUTE | $1,376,681 | A05 | inferred 0.50 | | Washington, DC | 2024 |
| THE CENTER FOR STATE AND LOCAL | $1,351,345 | A05 | inferred 0.60 | | Washington, DC | 2020 |
| RECYCLED PAPERBOARD TECHNICAL ASSOCIATION | $1,325,558 | A05 | inferred 0.80 | science: research education | Minneola, FL | 2025 |
| BETTER JOBS STRONGER FAMILIES | $1,280,337 | A05 | inferred 0.60 | | Midland, MI | 2018 |
| Pinpoint Policy Institute Inc | $1,280,000 | A05 | inferred 0.60 | | Alexandria, VA | 2024 |
| RURALORGANIZING-DOT-ORG EDUCATION FUND | $1,261,590 | A05 | published | | Columbus, OH | 2024 |
| MILLENNIUM INSTITUTE | $1,239,282 | A05 | inferred 0.50 | science: research education | Washington, DC | 2024 |
| INTERNATIONAL TEST AND EVALUATION ASSOCIATION | $1,228,550 | A05 | inferred 0.50 | science: research education | Fairfax, VA | 2024 |
| Mountain State Safety Action Inc | $1,192,950 | A05 | inferred 0.50 | | San Antonio, TX | 2024 |
| IMPROVED SOLUTIONS FOR URBAN SYSTEMS | $1,191,002 | A05 | inferred 0.60 | | Dayton, OH | 2011 |
| AMERICAN STUDIO | $1,163,766 | A05 | published | | Gig Harbor, WA | 2025 |
| ENERGY COUNCIL | $1,114,997 | A05 | inferred 0.50 | | Dallas, TX | 2024 |
| NATIONAL FAMILY FARM COALITION | $1,089,923 | A05 | inferred 0.55 | | Washington, DC | 2025 |
| PUBLIC POLICY FORUM INC RESEARCHING | $1,049,759 | A05 | inferred 0.55 | | Milwaukee, WI | 2017 |
| MINNESOTA PUBLIC INTEREST RESEARCH | $976,391 | A05 | inferred 0.50 | violence: sexual | Minneapolis, MN | 2012 |
| ANTIQUITIES COALITION | $949,668 | A05 | published | | Washington, DC | 2024 |
| DEVELOPMENT INITIATIVES POVERTY RESEARCH AMERICA INC | $944,618 | A05 | inferred 0.70 | violence: sexual | Washington, DC | 2024 |
| MYANMAR POLICY INSTITUTE | $936,247 | A05 | published | | Smyrna, DE | 2025 |
| AUSTIN AREA RESEARCH ORGANIZATION INC | $923,814 | A05 | inferred 0.60 | women: issues | Austin, TX | 2025 |
| LOUDOUN COMMUNITY MEDIA | $893,046 | A05 | published | | Leesburg, VA | 2025 |
| FASTER ARKANSAS | $882,669 | A05 | inferred 0.50 | | Little Rock, AR | 2014 |
| Haiti Renewal Alliance | $835,684 | A05 | inferred 0.50 | | Bethesda, MD | 2022 |
| CENTER FOR BLACK BROWN AND QUEER STUDIES INC | $834,681 | A05 | published | | Cambridge, MA | 2024 |
| OKLAHOMA ACADEMY FOR STATE GOALS | $831,483 | A05 | inferred 0.50 | | Norman, OK | 2024 |
| MARKETING SCIENCE INSTITUTE | $827,620 | A05 | inferred 0.70 | science: research education | Cambridge, MA | 2020 |
| OPEN MEDIA FOUNDATION | $806,337 | A05 | inferred 0.55 | | Denver, CO | 2025 |
| AMERICAN RESOLVE INSTITUTE | $806,125 | A05 | published | | Austin, TX | 2025 |
| ACADEMY OF PRODUCER INSURANCE STUDIES INC | $803,744 | A05 | inferred 0.50 | | Austin, TX | 2024 |
| PORTULANS INSTITUTE | $793,560 | A05 | published | | Washington, DC | 2025 |