| AMERICAN ENTERPRISE INSTITUTE FOR PUBLIC POLICY RESEARCH | $75,372,309 | V05 | published | | Washington, DC | 2024 |
| CIVIL-MILITARY INNOVATION INSTITUTE INC | $55,352,924 | V05 | published | | Morgantown, WV | 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 |
| GREAT LAKES BEHAVIORAL RESEARCH INSTITUTE | $18,400,471 | V05 | inferred 0.60 | domestic violence | Cranberry Twp, PA | 2024 |
| GLOBAL FUND FOR A NEW ECONOMY INC | $17,875,325 | V05 | published | | Alameda, CA | 2025 |
| People-Centered Research Foundation | $17,764,685 | V05 | inferred 0.50 | | Washington, DC | 2019 |
| CENTER FOR APPLIED RESEARCH SOLUTIONS INC | $12,775,813 | V05 | published | abuse: substance | Santa Rosa, CA | 2024 |
| WELFARE RESEARCH INC | $12,259,419 | V05 | inferred 0.60 | | Albany, NY | 2025 |
| GRUPO NEXOS INC | $11,360,792 | V05 | published | | San Juan, PR | 2024 |
| AMERICAN INSTITUTE FOR BOYS AND MEN | $7,359,980 | V05 | published | men: issues | Washington, DC | 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 |
| INSTITUTE FOR CHILD OUTCOMES INC | $6,522,431 | V05 | inferred 0.85 | science: research education | Framingham, MA | 2017 |
| MORNING STAR FOUNDATION | $6,176,347 | V05 | published | | Woodland, CA | 2024 |
| HIGHWAY LOSS DATA INSTITUTE | $5,193,755 | V05 | inferred 0.60 | | Arlington, VA | 2024 |
| ORTHOPEDIC FOUNDATION FOR ANIMALS | $5,126,233 | V05 | inferred 0.60 | | Columbia, MO | 2025 |
| CENTER FOR EUROPEAN POLICY ANALYSIS | $5,121,505 | V05 | published | | Washington, DC | 2024 |
| AMERICAN ACTION FORUM INC | $4,436,380 | V05 | published | | Washington, DC | 2024 |
| THE AMERICAN PROMISE INC | $4,067,910 | V05 | published | | Tallahassee, FL | 2024 |
| ALLIANCE FOR LIFETIME INCOME | $4,024,029 | V05 | inferred 0.40 | | Washington, DC | 2025 |
| COMMON SENSE INSTITUTE | $4,013,468 | V05 | published | | Greenwood Vlg, CO | 2024 |
| FINANCIAL EDUCATION & RESEARCH FOUNDATION INC | $3,618,918 | V05 | inferred 0.45 | | Morristown, NJ | 2024 |
| THE JAMES MADISON INSTITUTE FOR PUBLIC POLICY STUDIES INC | $3,611,765 | V05 | inferred 0.80 | | Tallahassee, FL | 2024 |
| THE BERENS FOUNDATION | $3,594,415 | V05 | published | | Glenview, IL | 2024 |
| HARRY FRANK GUGGENHEIM FOUNDATION | $3,498,184 | V05 | inferred 0.50 | violence: gun | New York, NY | 2024 |
| NEXT RIVER | $3,029,789 | V05 | published | | Oakland, CA | 2024 |
| NAPOLITAN INSTITUTE | $2,916,926 | V05 | published | | Spring, TX | 2025 |
| NATIONAL CENTER FOR POLICY ANALYSIS | $1,952,460 | V05 | inferred 0.70 | women: issues | Dallas, TX | 2015 |
| KNOLOGY LTD | $1,920,920 | V05 | published | science: research education | New York, NY | 2024 |
| INSTITUTE FOR POLITICAL INNOVATION | $1,919,623 | V05 | published | | Chicago, IL | 2024 |
| CENTER FOR AMERICAN GREATNESS INC | $1,685,257 | V05 | published | | Paradise Valley, AZ | 2024 |
| SUPERBLOOM DESIGN | $1,583,212 | V05 | published | | San Francisco, CA | 2024 |
| INSTITUTE FOR AFROURBANISM | $1,536,284 | V05 | published | | Detroit, MI | 2023 |
| FOURTH FREEDOM FORUM INC | $1,509,925 | V05 | inferred 0.80 | | Goshen, IN | 2025 |
| FINMAN CORPORATION | $1,384,962 | V05 | inferred 0.60 | | Tampa, FL | 2025 |
| AMERICAN INSTITUTE FOR BEHAVIORAL RESEARCH AND TECHNOLOGY | $1,297,121 | V05 | published | science: research education | Vista, CA | 2025 |
| GOOD ENERGY COLLECTIVE INCORPORATED | $1,282,043 | V05 | published | | Sacramento, CA | 2024 |
| SEASTEADING INSTITUTE | $1,257,075 | V05 | published | | Oakland, CA | 2025 |
| EDUCATIONAL RESEARCH SERVICE INC | $1,177,631 | V05 | inferred 0.50 | | Alexandria, VA | 2010 |
| COALITION FOR A PROSPEROUS AMERICA EDUCATION FUND | $1,154,428 | V05 | published | | Washington, DC | 2024 |
| CARDINAL INSTITUTE FOR WEST VIRGINIA POLICY INC | $1,054,352 | V05 | published | | Charleston, WV | 2024 |
| MASSACHUSETTS STUDENT PUBLIC INTEREST RESEARCH GROUP INC | $1,020,492 | V05 | inferred 0.60 | | Boston, MA | 2024 |
| GOOD SCIENCE PROJECT | $1,020,243 | V05 | published | space: outer | Roswell, GA | 2025 |
| HOMER HOYT INSTITUTE | $930,916 | V05 | inferred 0.45 | | North Palm Beach, FL | 2024 |
| ARC4JUSTICE INC | $862,023 | V05 | published | shelter: homeless | Lexington, MA | 2024 |
| CENTER FOR VIOLENCE PREVENTION RESEARCH INC | $848,675 | V05 | published | violence: prevention | Jacksonville, FL | 2024 |
| ASSOC FOR RESEARCH ON NONPROFIT ORGANIZATIONS & VOLUNTARY ACTIONS | $842,606 | V05 | inferred 0.70 | | Indianapolis, IN | 2024 |
| PARKVIEW INSTITUTE INC | $827,859 | V05 | published | | Bethesda, MD | 2025 |
| COALITION FOR EVIDENCE-BASED POLICY INC | $741,434 | V05 | published | | Bethesda, MD | 2025 |
| KNOWLEDGE ECOLOGY INTERNATIONAL INC | $703,096 | V05 | published | | Washington, DC | 2024 |
| CIRCLE FOUNDATION INC | $696,884 | V05 | inferred 0.55 | | Washington, DC | 2024 |
| EVOLUTION INSTITUTE INC | $694,619 | V05 | published | science: research education | San Antonio, FL | 2025 |
| NATIONAL ORGANIZATION OF RESEARCH DEVELOPMENT PROFESSIONALS | $671,026 | V05 | published | | Oakbrook Terrace, IL | 2024 |
| GRUTER INSTITUTE FOR LAW AND BEHAVIORAL RESEARCH | $646,928 | V05 | inferred 0.60 | | Portola Vally, CA | 2024 |
| US SIF FOUNDATION LTD | $639,256 | V05 | inferred 0.60 | | Washington, DC | 2025 |
| SOCIETY FOR APPLIED ANTHROPOLOGY | $636,669 | V05 | inferred 0.60 | | Oklahoma City, OK | 2025 |
| HUSKY RESEARCH CORPORATION INC | $632,027 | V05 | published | | Bloomsburg, PA | 2024 |
| CENTER FOR ISLAMOPHOBIA STUDIES | $570,923 | V05 | published | science: research education | Berkeley, CA | 2024 |
| INSTITUTE FOR HEALTH POLICY SOLUTIONS | $554,552 | V05 | inferred 0.70 | | Washington, DC | 2014 |
| ASIA POLICY INSTITUTE INC | $523,500 | V05 | published | | Marlton, NJ | 2024 |
| SOLIDARITY RESEARCH CENTER | $511,630 | V05 | published | science: research education | Los Angeles, CA | 2024 |
| METHODS INNOVATION INC | $445,252 | V05 | published | | Casper, WY | 2024 |
| BEAVER COUNTY BAR ASSOC | $439,603 | V05 | inferred 0.50 | | Beaver, PA | 2024 |
| SPENDLOVE RESEARCH FOUNDATION | $413,014 | V05 | inferred 0.40 | | Logan, UT | 2018 |
| COMITAS INSTITUTE FOR ANTHROPOLOGICAL STUDY INC | $401,333 | V05 | published | science: research education | New York, NY | 2025 |
| NORTH STAR POLICY ACTION | $396,471 | V05 | inferred 0.45 | | Saint Paul, MN | 2025 |
| LEVERAGE RESEARCH | $392,590 | V05 | published | science: research education | Albany, NY | 2024 |
| YORKTOWN FOUNDATION FOR FREEDOM | $380,000 | V05 | published | | Washington, DC | 2024 |
| SECULAR COALITION FOR AMERICA EDUCATION FUND | $374,466 | V05 | published | | Washington, DC | 2024 |
| AMERICAN GOVERNANCE FOUNDATION INC | $334,255 | V05 | published | abuse: substance | San Francisco, CA | 2024 |
| NFIB RESEARCH FOUNDATION | $331,353 | V05 | inferred 0.60 | science: research education | Nashville, TN | 2016 |
| NATIONAL ASSOCIATION FOR PRESIDING JUDGES AND COURT EXECUTIVE OFFICER | $294,077 | V05 | inferred 0.70 | | Williamsburg, VA | 2024 |
| DEFENSE RESEARCH LABS | $286,383 | V05 | inferred 0.60 | | Castle Pines, CO | 2025 |
| Palm Center | $277,838 | V05 | inferred 0.55 | science: research education | Houston, TX | 2022 |
| INSTITUTE FOR RESEARCH ON SOCIAL PROBLEMS | $277,024 | V05 | inferred 0.80 | | Delray Beach, FL | 2013 |
| WOMENS INSTITUTE FOR SCIENCE EQUITY AND RACE | $265,131 | V05 | published | women: issues | Mechanicsvlle, VA | 2024 |
| SELOUS FOUNDATION | $257,865 | V05 | inferred 0.45 | | Washington, DC | 2018 |
| THE FOUNDATION ENDOWMENT | $257,757 | V05 | inferred 0.55 | | Warrenton, VA | 2016 |
| NATIONAL COUNCIL OF ACOUSTICAL CONSULTANTS | $235,100 | V05 | inferred 0.55 | | Indianapolis, IN | 2024 |
| MIDWEST FINANCE ASSOCIATION WITTENBERG UNIVERSITY | $230,673 | V05 | inferred 0.70 | | Evanston, IL | 2025 |
| THE INTERNATIONAL NETWORK OF RESOURCE INFORMATION CENTERS | $224,830 | V05 | inferred 0.60 | science: research education | Cornish, NH | 2025 |
| SCANDANAVIAN CONSORTIUM FOR | $224,264 | V05 | inferred 0.40 | | Stanford, CA | 2024 |
| LEVANT CENTER FOR STRATEGIC STUDIES | $216,565 | V05 | published | | Washington, DC | 2024 |
| PROUT RESEARCH INSTITUTE | $210,428 | V05 | published | | Marshall, NC | 2025 |
| AMERICAN LEARNING INSTITUTE FOR MUSLIM | $204,191 | V05 | published | | Canton, MI | 2024 |
| WEALTH OF NATIONS INSTITUTE INC | $199,580 | V05 | published | | Wilmington, DE | 2025 |
| 2 Degrees America Inc | $198,537 | V05 | inferred 0.80 | science: research education | New York, NY | 2021 |
| AMERICAN JUDICATURE SOCIETY | $194,433 | V05 | inferred 0.60 | | Honolulu, HI | 2025 |
| ETHICAL INVESTMENT RESEARCH SERVICES EIRIS USA LIMITED | $175,171 | V05 | published | | Quincy, MA | 2024 |
| GEOPOLITICAL INSIGHT AND EDUCATION FOUNDATION | $171,829 | V05 | published | | Washington, DC | 2025 |
| INSTITUTE FOR SPENDING REFORM INC | $165,700 | V05 | inferred 0.80 | | Alexandria, VA | 2017 |
| RICE INSTITUTE INC | $163,937 | V05 | published | women: issues | Amston, CT | 2024 |
| NATL FOUNDATION FOR UNEMPLOYMENT & WORKERS COMPENSATION INC | $161,346 | V05 | inferred 0.60 | | Columbus, OH | 2025 |
| NATIONAL ASSOCIATION FOR WELFARE RESEARCH & STATISTICS | $159,705 | V05 | inferred 0.70 | | Baton Rouge, LA | 2023 |
| THE HUME INITIATIVE INC | $155,500 | V05 | inferred 0.60 | | New York, NY | 2022 |
| LESNIAK INSTITUTE FOR AMERICAN LEADERSHIP INC | $150,131 | V05 | published | | Union, NJ | 2024 |
| ALLIANCE FOR A BETTER VERMONT | $132,693 | V05 | inferred 0.80 | | Montpelier, VT | 2022 |
| WOMENS RESOURCE CENTER | $132,600 | V05 | published | women: issues | Houston, TX | 2025 |
| BLUEPRINT NEBRASKA | $131,419 | V05 | inferred 0.60 | science: research education | Omaha, NE | 2021 |