| CATHOLIC COMMUNITY SERVICES OF WESTERN WASHINGTON | Seattle | P200 Human Services | $332.5M | 18 |
| GESA CREDIT UNION | Richland | — | $331.7M | 23 |
| CREDIT UNIONS IN THE STATE OF WASHINGTON PEAK CREDIT UNION | Olympia | — | $318.6M | 42 |
| SEATTLE FOUNDATION | Seattle | T31 Philanthropy, Voluntarism & Grantmaking Foundations | $314.7M | 12 |
| GREATER GOOD CHARITIES | Seattle | T30 Philanthropy, Voluntarism & Grantmaking Foundations | $311.9M | 10 |
| MAXAID | Seattle | G19 Diseases, Disorders & Medical Disciplines | $309.1M | 2 |
| PACMED CLINICS | Renton | E30 Health Care | $304.7M | 13 |
| COMMUNITY HEALTH NETWORK OF WASHINGTON | Seattle | — | $302.5M | 21 |
| Community Health Association of Spokane | Spokane | E320 Health Care | $300.4M | 14 |
| ASSOCIATION OF WASHINGTON CITIES EMPLOYEE BENEFIT TRUST | Olympia | — | $299.5M | 0 |
| SOUND HEALTH & WELLNESS TRUST | Bothell | — | $296M | 0 |
| THE ASSOCIATION OF CHRMC AND UNIVERSITY PHYSICIANS | Seattle | E120 Health Care | $294.3M | 25 |
| PROVIDENCE SAINT JOHN'S MEDICAL FOUNDATION | Renton | E21 Health Care | $274.4M | 20 |
| ALLEN INSTITUTE | Seattle | H96 Medical Research | $272.1M | 10 |
| SWEDISH EDMONDS | Renton | E22 Health Care | $270.3M | 16 |
| NUMERICA CREDIT UNION | Spokane Valley | — | $255.2M | 35 |
| SKOOKUM EDUCATIONAL PROGRAMS DBA TESSERA | Bremerton | — | $247.6M | 14 |
| NORTHWEST CARPENTERS HEALTH AND SECURITY PLAN | Seattle | — | $243.4M | 5 |
| BEZOS FAMILY FOUNDATION | Seattle | T22 Philanthropy, Voluntarism & Grantmaking Foundations | $225M | 1 |
| COVENANT MEDICAL GROUP | Renton | E310 Health Care | $223.2M | 21 |
| PROVIDENCE MEDICAL INSTITUTE | Renton | Z99Z Unknown | $222M | 17 |
| HEALTHPOINT | Renton | E32Z Health Care | $217.1M | 7 |
| ST JOSEPH HEALTH SYSTEM | Renton | E21 Health Care | $216.2M | 15 |
| VEBA Trust for Public Employees in the Northwest | Spokane | Y44 Mutual & Membership Benefit | $211.2M | 0 |
| CHRIST CARES FOR KIDS FOUNDATION | Issaquah | T22 Philanthropy, Voluntarism & Grantmaking Foundations | $208.9M | 0 |
| THE ALLEN INSTITUTE FOR ARTIFICIAL INTELLIGENCE | Seattle | U50 Science & Technology | $205.8M | 5 |
| LOCALS 302 & 612 INTL UNION OF OPERATING ENGINEERS CONST IND HEALTH AND SECURITY PLAN | Seattle | — | $186.6M | 0 |
| ASEAAFSCME LOCAL 52 HEALTH BENEFITS TRUST | Spokane | Y43 Mutual & Membership Benefit | $185.2M | 0 |
| ALLEN FAMILY PHILANTHROPIES | Seattle | T20 Philanthropy, Voluntarism & Grantmaking Foundations | $180.7M | 0 |
| UNIVERSITY OF WASHINGTON FOUNDATION C/O UNIVERSITY OF WASHINGTON | Seattle | B11 Education | $180.5M | 0 |
| M J MURDOCK CHARITABLE TRUST | Vancouver | T22 Philanthropy, Voluntarism & Grantmaking Foundations | $179.8M | 7 |
| SOUND CREDIT UNION | Tacoma | — | $178.2M | 22 |
| HAPO COMMUNITY CREDIT UNION | Richland | Z99 Unknown | $171.2M | 33 |
| BOARD OF TRUSTEES OF WHITMAN COLLEGE | Walla Walla | B420 Education | $169.3M | 15 |
| WHATCOM EDUCATIONAL CREDIT UNION | Bellingham | W61 Public & Societal Benefit | $166.5M | 25 |
| Pacific Lutheran University | Tacoma | B430 Education | $165.5M | 9 |
| BLOODWORKS | Seattle | E610 Health Care | $159.8M | 20 |
| SEATTLE CHILDREN'S FOUNDATION | Seattle | — | $155.3M | 19 |
| KITSAP CREDIT UNION | Bremerton | — | $153.7M | 22 |
| THE UNIVERSITY OF PUGET SOUND | Tacoma | B430 Education | $151.6M | 18 |
| SECOND HARVEST INLAND NORTHWEST | Spokane | K31 Food, Agriculture & Nutrition | $151.4M | 6 |
| FOOD LIFELINE | Seattle | K33Z Food, Agriculture & Nutrition | $150.5M | 11 |
| Wenatchee Valley Hospital | Wenatchee | — | $150.3M | 0 |
| EVERGREEN GOODWILL OF NORTHWEST WASHINGTON | Seattle | — | $149.8M | 10 |
| NORTHWEST LABORERS - EMPLOYERS HEALTH AND SECURITY TRUST FUND | Bothell | — | $148.2M | 8 |
| WHITWORTH UNIVERSITY | Spokane | B430 Education | $146.8M | 10 |
| NORTHWEST KIDNEY CENTERS | Seatac | E300 Health Care | $141.6M | 14 |
| EDUCATIONAL CORPORATION MUKOGAWA GAKUIN | Spokane | B200 Education | $141.4M | 9 |
| Confluence Health System | Wenatchee | — | $139M | 0 |
| COLUMBIA COMMUNITY CREDIT UNION | Vancouver | — | $138M | 24 |
