Who funds International Rett Syndrome Foundation
104 institutional funders have given since 2022, 63 of them directly, through tax year 2025.
Its two largest direct donors
- Borracho Pescador$423K2022–2025
- TWF Foundation$150K2022–2024
A free account names its 5 largest direct donors, and the funders behind them.
Unlock potential prospectsFinances
Latest return: tax year 2025, Form 990.
| Tax year | Revenue | Expenses | Net assets |
|---|---|---|---|
| 2025 | $4.3M | $5.2M | $4.4M |
| 2024 | $4.8M | $5.5M | $5.0M |
| 2023 | $4.9M | $3.7M | $5.9M |
| 2022 | $3.7M | $5.5M | $4.5M |
| 2021 | $4.1M | $4.1M | $6.0M |
Contributions and grants received in 2025: $3.8M.
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Built from the organization’s public IRS Form 990 filings and the gifts other organizations report on theirs, processed by Aprize. Institutional donors only: individual donors are never shown. Data as of 1 November 2026.
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