Costolo Family Foundation
Invitation OnlyWilmington, Delaware · EIN 86-1199543 · Private foundation
Grants paid (2025)$625K
Organizations funded7
Typical grant$100,000
Total assets$12.4M
Half of its grants to organizations were between $50,000 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
100% of grants went outside Delaware.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Grand Teton National Park Foundation | Moose, WY | General & Unrestricted | $150,000 |
| Conservation International Foundation | Boston, MA | General & Unrestricted | $100,000 |
| Elephant Havens Wildlife Foundation Inc | Dallas, TX | General & Unrestricted | $100,000 |
| Pacific Wild Alliance | Issaquah, WA | General & Unrestricted | $100,000 |
| The Nature Conservancy | Cold Spring Harbor, NY | General & Unrestricted | $100,000 |
| Sarara Institute | Denver, CO | General & Unrestricted | $50,000 |
| Teton County Search & Rescue Foundation | Jackson, WY | General & Unrestricted | $25,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $625,000 | 7 |
| 2024 | $420,000 | 7 |
| 2023 | $270,000 | 5 |
Sources
- IRS Form 990-PF, tax year 2025, filed Jul 24, 2026 - IRS e-file batch, object ID 202602059349100120
- IRS Tax Exempt Organization Search for EIN 86-1199543
- Profile updated Nov 5, 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.