Costolo Family Foundation
Preselected recipients only
Costolo Family Foundation is a private foundation in Wilmington, Delaware. In tax year 2025 it gave $625,000 in 7 grants; the typical grant was $100,000 and the largest $150,000. It only gives to organizations it selects itself and does not accept unsolicited applications.
From its IRS Form 990-PF for tax year 2025.
- Grants paid, 2025$625,000
- Number of grants7
- Typical grant$100,000
- Largest grant$150,000
- Assets$12.4 million
- New grantees29%
Giving in 2025 was up from $420,000 the year before.
29% of its 2025 grantees had not received a grant from it the year before, a mix of repeat and new grantees.
Giving by year
| Tax year | Grants paid | Number of grants | Assets |
|---|---|---|---|
| 2023 | $270,000 | 5 | $10.6 million |
| 2024 | $420,000 | 7 | $11.1 million |
| 2025 | $625,000 | 7 | $12.4 million |
How to apply
Costolo Family Foundation says in its IRS filing that it only makes contributions to preselected organizations, so unsolicited applications are unlikely to be considered. Organizations it funds are usually invited.
What Costolo Family Foundation funds
Where it gives
Its grants went to recipients in 6 states, the most to Wyoming.
| State | Grants | Amount |
|---|---|---|
| Wyoming | 2 | $175,000 |
| Massachusetts | 1 | $100,000 |
| New York | 1 | $100,000 |
| Texas | 1 | $100,000 |
| Washington | 1 | $100,000 |
| Colorado | 1 | $50,000 |
Grants paid in 2025
| Recipient | Purpose | Amount |
|---|---|---|
| Grand Teton National Park Foundation | General & Unrestricted | $150,000 |
| Conservation International Foundation | General & Unrestricted | $100,000 |
| Elephant Havens Wildlife Foundation Inc | General & Unrestricted | $100,000 |
| Pacific Wild Alliance | General & Unrestricted | $100,000 |
| The Nature Conservancy | General & Unrestricted | $100,000 |
| Sarara Institute | General & Unrestricted | $50,000 |
| Teton County Search & Rescue Foundation | General & Unrestricted | $25,000 |
Officers and trustees
- Lorin Costolo
- Richard Costolo
- Rose Costolo
Questions people ask
Does Costolo Family Foundation accept grant applications?
No. Its IRS filing says it only makes contributions to preselected organizations.
How much does Costolo Family Foundation give?
$625,000 in tax year 2025, across 7 grants, with a typical grant of $100,000.
Who runs Costolo Family Foundation?
Its 2025 filing lists Lorin Costolo (Dir, Pres), Richard Costolo (Dir, Sec, Treas) and Rose Costolo (Dir).
What does Costolo Family Foundation fund?
Based on its grants, mainly environment and conservation.