| Support Our Aging ReligiousEIN 52-1485481 | Religion | DC | $2,598,741Small | 87.13 |
| Tax FoundationEIN 52-1703065 | Research and Public Policy | DC | $4,178,093Mid-sized | 84.96 |
| Taxpayers for Common SenseEIN 52-1941122 | Human and Civil Rights | DC | $1,821,148Small | 92.02 |
| The ALS Association, National OfficeEIN 13-3271855 | Health | DC | $37,818,211Large | 95.21 |
| The American Congress of Obstetricians and GynecologistsEIN 36-2217981 | Health | DC | $41,598,166Large | 84.20 |
| The American ProspectEIN 52-1617061 | Arts, Culture, Humanities | DC | $1,790,565Small | 75.01 |
| The Aspen InstituteEIN 84-0399006 | Research and Public Policy | DC | $136,995,834Large | 94.32 |
| The Atlantic Council of the United StatesEIN 52-0742294 | International | DC | $27,655,974Large | 94.74 |
| The Brookings InstitutionEIN 53-0196577 | Research and Public Policy | DC | $100,059,312Large | 83.36 |
| The Campaign Legal CenterEIN 04-3608387 | Human and Civil Rights | DC | $4,833,452Mid-sized | 90.45 |
| The Center for Democracy and TechnologyEIN 52-1905358 | Research and Public Policy | DC | $5,251,059Mid-sized | 86.38 |
| The Center for Strategic and International StudiesEIN 52-1501082 | International | DC | $46,332,597Large | 88.94 |
| The Climate Reality ProjectEIN 87-0745629 | Environment | DC | $16,685,214Large | 88.37 |
| The Ellington Fund EIN 52-1152273 | Arts, Culture, Humanities | DC | $1,790,367Small | 74.64 |
| The Equal Rights CenterEIN 52-1297949 | Human and Civil Rights | DC | $1,268,339Small | 77.75 |
| The European InstituteEIN 52-1627721 | International | DC | $795,173Small | 58.41 |
| The Federalist Society for Law and Public Policy StudiesEIN 36-3235550 | Research and Public Policy | DC | $18,233,577Large | 92.22 |
| The Fund for American StudiesEIN 13-6223604 | Education | DC | $11,334,174Mid-sized | 88.55 |
| The Fund for Global Human RightsEIN 75-3029336 | International | DC | $13,234,748Mid-sized | 89.07 |
| The Heritage FoundationEIN 23-7327730 | Research and Public Policy | DC | $85,427,198Large | 86.19 |
| The Humane Society of the United StatesEIN 53-0225390 | Animals | DC | $126,131,691Large | 75.49 |
| The Interfaith Alliance FoundationEIN 81-0587332 | Religion | DC | $850,247Small | 76.28 |
| The Israel ProjectEIN 37-1472882 | International | DC | $7,296,008Mid-sized | 79.32 |
| The John F. Kennedy Center for the Performing ArtsEIN 53-0245017 | Arts, Culture, Humanities | DC | $227,384,468Large | 90.46 |
| The Lambi Fund of HaitiEIN 52-1843357 | International | DC | $764,757Small | 84.23 |
| The Middle East Media Research InstituteEIN 52-2068483 | International | DC | $5,903,271Mid-sized | 89.74 |
| The Mountain InstituteEIN 55-0541323 | Environment | DC | $2,301,129Small | 80.82 |
| The National Council for Science and the EnvironmentEIN 52-1700932 | Research and Public Policy | DC | $1,393,600Small | 59.46 |
| The National Italian American FoundationEIN 52-1071723 | Human and Civil Rights | DC | $4,799,050Mid-sized | 89.00 |
| The National Security ArchiveEIN 22-2127884 | International | DC | $2,850,713Small | 92.61 |
| The NEA FoundationEIN 23-7035089 | Education | DC | $7,031,231Mid-sized | 94.37 |
| The Ocean FoundationEIN 71-0863908 | Environment | DC | $6,252,396Mid-sized | 93.79 |
| The Philanthropy RoundtableEIN 13-2943020 | Research and Public Policy | DC | $8,917,853Mid-sized | 91.97 |
| The Phillips CollectionEIN 53-0204620 | Arts, Culture, Humanities | DC | $13,559,889Large | 86.75 |
| The Prince of Wales FoundationEIN 36-3820023 | Human Services | DC | $8,695,151Mid-sized | 76.07 |
| The SEED FoundationEIN 54-1850819 | Education | DC | $5,472,657Mid-sized | 89.48 |
| The Sentencing ProjectEIN 52-1472546 | Human and Civil Rights | DC | $1,485,974Small | 92.20 |
| The SentryEIN 20-8827879 | International | DC | $2,861,789Small | 89.39 |
| The Sunlight FoundationEIN 20-3903427 | Human and Civil Rights | DC | $1,451,359Small | 81.08 |
| The Supreme Court Historical SocietyEIN 23-7420574 | Arts, Culture, Humanities | DC | $2,694,765Small | 82.95 |
| The Trinity ForumEIN 54-1612640 | Education | DC | $1,119,991Small | 86.40 |
| The Voter Participation CenterEIN 55-0889748 | Human and Civil Rights | DC | $6,322,992Mid-sized | 76.59 |
| The Wilderness SocietyEIN 53-0167933 | Environment | DC | $31,030,390Large | 89.71 |
| The Woodson CenterEIN 52-1217891 | Community Development | DC | $5,621,177Mid-sized | 84.04 |
| Thelonious Monk Institute of JazzEIN 52-1544030 | Arts, Culture, Humanities | DC | $4,330,076Mid-sized | 88.81 |
| Theodore Roosevelt Conservation PartnershipEIN 04-3706385 | Environment | DC | $4,434,421Mid-sized | 92.27 |
| Thrive DCEIN 52-1485474 | Human Services | DC | $3,114,337Small | 91.38 |
| Thurgood Marshall College FundEIN 41-1750692 | Education | DC | $22,162,863Large | 92.15 |
| TostanEIN 98-0118876 | International | DC | $6,631,431Mid-sized | 90.18 |
| Truman Center for National PolicyEIN 52-1080919 | Research and Public Policy | DC | $2,520,516Small | 63.81 |
| ULI FoundationEIN 23-7133957 | Community Development | DC | $6,498,365Mid-sized | 90.36 |
| UNCFEIN 13-1624241 | Education | DC | $171,722,769Large | 88.22 |
| UnidosUSEIN 86-0212873 | Human and Civil Rights | DC | $31,634,959Large | 90.28 |
| United Nations FoundationEIN 58-2368165 | International | DC | $116,848,010Large | 89.68 |
| United Palestinian AppealEIN 11-2494808 | International | DC | $23,225,518Large | 96.46 |
| United States Capitol Historical SocietyEIN 52-0796820 | Arts, Culture, Humanities | DC | $2,148,017Small | 88.50 |
| United States Holocaust Memorial MuseumEIN 52-1309391 | Arts, Culture, Humanities | DC | $114,626,678Large | 88.88 |
| United States Soccer FoundationEIN 36-3976313 | Human Services | DC | $11,486,106Mid-sized | 93.04 |
| United States-Indonesia SocietyEIN 52-1862994 | International | DC | $920,025Small | 82.39 |
| UNRWA USA National CommitteeEIN 20-2714426 | International | DC | $2,915,304Small | 80.58 |