Nancy and Geoffrey Stack Family Foundation
Invitation OnlyNewport Beach, California · EIN 71-1019812 · Private foundation
Half of its grants to organizations were between $5,000 and $25,000.
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 California.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| UC San Diego Foundation | LA Jolla, CA | General support | $825,000 |
| Cystinosis Research Foundation | Irvine, CA | General support | $100,000 |
| Georgetown University Scholarship | Washington, DC | General support | $25,000 |
| University of Pennsylvania | Philidelphia, PA | General support | $25,000 |
| Uli Foundation | Washington, DC | General support | $10,000 |
| Habitat for Humanity | Santa Ana, CA | General support | $10,000 |
| Marine Corps Scholarship Foundation | Dumfries, VA | General support | $10,000 |
| Segerstrom Center for the Arts | Costa Mesa, CA | General support | $10,000 |
| Orange County Community Foundation | Newport Beach, CA | General support | $5,000 |
| UC Berkeley Foundation | Berkeley, CA | General support | $5,000 |
| City of Hope | Duarte, CA | General support | $5,000 |
| Dawn Redwoods Charitable Trust | Tiburon, CA | General support | $500 |
The return also lists 3 grants to individuals ($90,000). We do not publish the names of individual recipients.
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $1,120,500 | 15 |
| 2024 | $3,252,000 | 22 |
| 2023 | $1,584,500 | 19 |
Sources
- IRS Form 990-PF, tax year 2025, filed Aug 17, 2026 - IRS e-file batch, object ID 202612299349100321
- IRS Tax Exempt Organization Search for EIN 71-1019812
- 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.