The Heartstone Foundation
Invitation OnlyBrookline, Massachusetts · EIN 20-6197750 · Private foundation
Grants paid (2025)$874K
Organizations funded6
Typical grant$85,000
Total assets$20.3M
Half of its grants to organizations were between $69,601 and $100,000.
From the return
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
33% of grants went outside Massachusetts.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| American Friends of Magen David Adom | New York, NY | General charitable support | $500,000 |
| Concord Academy | Concord, MA | General charitable support | $100,000 |
| The Belmont School | Deerfield, MA | General charitable support | $90,000 |
| Eagle Foundation of Massachusetts | Hardwick, MA | General charitable support | $85,000 |
| Fidelity Charitable | Cincinnati, OH | General charitable support | $69,601 |
| Temple Ohabei Shalom | Brookline, MA | General charitable support | $29,310 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $873,911 | 6 |
| 2024 | $1,134,719 | 4 |
| 2023 | $1,000,000 | 2 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 13, 2026 - IRS e-file batch, object ID 202611339349100346
- IRS Tax Exempt Organization Search for EIN 20-6197750
- Profile updated Nov 7, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.