| AARP FOUNDATION | $295,801,954 | $187,425,925 |
| PAYPAL CHARITABLE GIVING FUND | $180,334,357 | $180,246,020 |
| HEALTH SERVICES FOR CHILDREN WITH SPECIAL NEEDS INC | $181,163,659 | $178,878,808 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS PENSION BENEFIT FUND | $165,920,481 | $173,623,168 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS | $172,196,984 | $170,980,542 |
| INTERNATIONAL BROTHERHOOD OF TEAMSTERS | $208,821,018 | $170,401,488 |
| KIPP DC PUBLIC CHARTER SCHOOLS | $167,651,752 | $168,457,662 |
| CHAMBER OF COMMERCE OF THE USA | $167,828,342 | $167,921,955 |
| UNITED NEGRO COLLEGE FUND INC | $91,147,616 | $161,420,687 |
| NATIONAL REHABILITATION HOSPITAL | $140,085,314 | $147,691,773 |
| ASPEN INSTITUTE INC | $152,108,136 | $145,905,329 |
| NATIONAL GEOGRAPHIC SOCIETY | $70,469,785 | $145,411,426 |
| SIXTEEN THIRTY FUND | $143,837,877 | $141,396,752 |
| INTERNATIONAL FOOD POLICY RESEARCH INSTITUTE | $141,653,433 | $140,918,938 |
| COMMUNICATIONS WORKERS OF AMERICA AFL-CIO CLC | $110,638,001 | $140,016,510 |
| AMERICAN PSYCHOLOGICAL ASSOCIATION INC | $131,891,890 | $139,105,553 |
| HUMANE SOCIETY OF THE UNITED STATES | $159,191,532 | $138,682,954 |
| AMERICAN HOSPITAL ASSOCIATION INC | $142,840,228 | $136,240,440 |
| UNITY HEALTH CARE INC | $131,278,357 | $132,966,655 |
| AMERICAN CHEMISTRY COUNCIL | $129,808,428 | $128,437,437 |
| SPECIAL OLYMPICS INC | $135,575,691 | $128,087,216 |
| NATIONAL DEMOCRATIC INSTITUTE FOR INTERNATIONAL AFFAIRS | $128,065,419 | $127,476,247 |
| UNITED STATES HOLOCAUST MEMORIAL MUSEUM | $164,810,706 | $126,926,273 |
| RFERL INC | $124,052,827 | $125,593,685 |
| AMERICAN FEDERATION OF STATE COUNTY AND MUNICIPAL EMPLOYEES | $179,478,956 | $125,315,338 |