| Railroad Employees National Health and Welfare Plan Trust | $1,773,181,499 |
| Nature Conservancy | $1,746,229,436 |
| Virginia Hospital Center Arlington Health System | $896,410,115 |
| National Rural Electric Cooperative | $838,293,694 |
| Public Broadcasting Service | $696,585,777 |
| Smart - Td Health and Welfare Plan | $644,079,592 |
| Partnership for Supply Chain Manage Ment | $490,016,158 |
| American Institutes for Research in the Behavioral Sciences | $437,187,471 |
| National Association of Chain Drug Stores Inc | $364,100,689 |
| The Conservation Fund A Nonprofit Corporation | $329,373,956 |
| U S Committee for Refugees and Immigrants Inc | $313,999,935 |
| Conservation International Foundation | $308,673,004 |
| National Rural Electric Cooperative Association | $227,345,758 |
| Americans for Prosperity | $223,706,334 |
| Stand Together Trust | $172,644,390 |
| United Service Organizations Inc | $168,028,301 |
| Cna Corporation | $154,356,745 |
| Consumer Technology Association | $153,775,854 |
| American Diabetes Association Inc | $152,241,578 |
| Greater Washington Educational Telecommunications Association Inc | $148,406,874 |
| Analytic Services Inc | $142,473,079 |
| Marymount University | $134,584,702 |
| International Justice Mission | $129,931,939 |
| Technoserve Inc | $122,123,118 |
| Trout Unlimited Inc | $109,528,553 |
| Nami National | $99,202,629 |
| Railroad Employees National Dental Plan and Trust | $94,688,351 |
| March of Dimes Inc | $85,191,655 |
| National Council on Aging Inc | $77,891,453 |
| Capital Impact Partners | $76,134,398 |
| Middle East Broadcasting Networks Inc | $73,748,565 |
| US Civilian Research and Development Foundation | $73,586,507 |
| Ethiopian Community Development Council Inc | $72,961,991 |
| Association of State and Territorial Health Officials | $72,754,622 |
| Communities in Schools Inc | $71,027,341 |
| American Institute in Taiwan | $70,384,329 |
| National Apartment Association | $67,857,026 |
| Common Application Inc | $65,847,203 |
| American Association of Motor Vehicle Administrators | $61,486,645 |
| The Railrd Emplys Nati Earl Retire Major Medcl Benefit Plan Trust | $57,685,120 |
| Institute for Justice | $55,276,320 |
| Association of the United State Army Inc | $50,896,685 |
| Army Navy Country Club | $50,428,550 |
| Navy-Marine Corps Relief Society | $48,902,234 |
| Mercatus Center Inc | $48,287,301 |
| Air-Conditioning Heating and Refrigeration Institute | $48,012,249 |
| National Association of Corporate Directors | $47,685,789 |
| Robin Merger Corporation Inc | $46,004,090 |
| Food Marketplace Inc | $44,887,297 |
| True Ground Housing Partners | $39,201,787 |
| National Defense Industrial Association | $34,794,526 |
| Insurance Institute for Highway Safety | $34,396,378 |
| Child Care Aware of America | $34,254,703 |
| Air & Space Forces Association | $33,219,089 |
| Army Emergency Relief | $32,975,008 |
| Infectious Diseases Society of America Inc | $32,259,941 |
| Ahc Inc | $32,048,676 |
| Good Food Institute Inc | $28,143,912 |
| Blue Investments for Nature Inc | $25,277,092 |
| Amyotrophic Lateral Sclerosis Assn | $20,939,101 |
| Stand Together Foundation | $8,352,812 |
| Charles Koch Foundation | $1,315,532 |
| Charles Koch Foundation II | $307,386 |