| Richmond Pediatrics PLLC | Disregarded entity | Pediatric healthcare services | WA | 861448700 |
| Seattle Children's Healthcare System | Related tax-exempt org | Healthcare | WA | 911250116 |
| Seattle Children's Hospital | Related tax-exempt org | Pediatric medical care | WA | 910564748 |
| Seattle Children's Foundation | Related tax-exempt org | Fundraising | WA | 911156519 |
| Seattle Children's Guild Association | Related tax-exempt org | Fundraising, child advocacy, and pediatric health awareness | WA | 911394056 |
| Children's Retail | Related tax-exempt org | Thrift stores | WA | 911998909 |
| Children's Health Network | Related tax-exempt org | Pediatric healthcare services | WA | 911226716 |
| Charitable Remainder Unitrusts (12) | Related taxable corporation/trust | Investments | WA | — |
| Charitable Remainder Unitrust (1) | Related taxable corporation/trust | Investments | AK | — |
| Charitable Remainder Unitrusts (3) | Related taxable corporation/trust | Investments | CA | — |
| Charitable Remainder Unitrust (1) | Related taxable corporation/trust | Investments | FL | — |
| Charitable Remainder Annuity Trusts (2) | Related taxable corporation/trust | Investments | WA | — |
| Perpetual Trusts (7) | Related taxable corporation/trust | Investments | WA | — |
| Pooled Income Fund (1) | Related taxable corporation/trust | Investments | WA | — |
| Brainchild BIO INC | Related taxable corporation/trust | Biotechnology | DE | 934381482 |