| Foundation to Promote Open Society | Related tax-exempt org | Charitable | DE | 263753801 |
| Alliance for Open Society International | Related tax-exempt org | Charitable | NY | 810623035 |
| Open Society Fund INC | Related tax-exempt org | Charitable | NY | 133095822 |
| Soros Economic Development Fund | Related tax-exempt org | Charitable | NY | 133965896 |
| Open Society Institute | Related tax-exempt org | Charitable | NY | 137029285 |
| Open Society Foundation London | Related tax-exempt org | Charitable | — | — |
| Bulgarian Building Fund | Related taxable corporation/trust | Real estate | — | — |
| Open Society Institute MGMT SVCS LTD | Related taxable corporation/trust | Real estate | — | — |
| Open Society Institute Company LTD | Related taxable corporation/trust | Charitable | — | — |
| Quantum Endowment Cayman Fund Limited | Related taxable corporation/trust | Investment | — | — |
| Sessile OAK Feeder Fund LTD | Related taxable corporation/trust | Investment | — | — |
| Qfpos LLC | Related taxable corporation/trust | Investment | — | — |
| Qfpos LTD | Related taxable corporation/trust | Investment | — | — |