Tidemark 10 Foundation
Preselected recipients only
Tidemark 10 Foundation is a private foundation in Wilmington, Delaware. In tax year 2025 it gave $1.4 million in 16 grants; the typical grant was $7,860 and the largest $1.0 million. 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$1.4 million
- Number of grants16
- Typical grant$7,860
- Largest grant$1.0 million
- Assets$11.4 million
- New grantees94%
Giving in 2025 was up from $8,674 the year before.
94% of its 2025 grantees had not received a grant from it the year before, a sign it is open to new organizations.
Giving by year
| Tax year | Grants paid | Number of grants | Assets |
|---|---|---|---|
| 2023 | $1.0 million | 1 | $1.7 million |
| 2024 | $8,674 | 2 | $10.1 million |
| 2025 | $1.4 million | 16 | $11.4 million |
How to apply
Tidemark 10 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 Tidemark 10 Foundation funds
Where it gives
Its grants went to recipients in 8 states, the most to California.
| State | Grants | Amount |
|---|---|---|
| California | 6 | $1.0 million |
| Massachusetts | 2 | $301,000 |
| Virginia | 2 | $30,000 |
| District of Columbia | 2 | $15,000 |
| Illinois | 1 | $10,000 |
| New York | 1 | $10,000 |
| Iowa | 1 | $4,500 |
| New Jersey | 1 | $1,000 |
Grants paid in 2025
| Recipient | Purpose | Amount |
|---|---|---|
| Stanford University | For the center for ocean solutions | $1.0 million |
| Fidelity Investments Charitable Gift Fund | General & unrestricted | $300,000 |
| Nature Conservancy | California Oceans Program | $20,000 |
| Carnegie Endowment for International Peace | General & Unrestricted | $10,000 |
| Kqed Inc | General & Unrestricted | $10,000 |
| Natural Resources Defense Council Inc | General & Unrestricted | $10,000 |
| PBS Foundation | General & Unrestricted | $10,000 |
| Refed Inc | General & Unrestricted | $10,000 |
| Sustainable Surf | General & Unrestricted | $5,720 |
| Los Angeles Fire Department Foundation | LA Wildfire Relief | $5,000 |
| World Central Kitchen Incorporated | LA Wildfire Relief | $5,000 |
| American National Red Cross | LA Wildfire Relief | $4,500 |
| Lifemoves | General & Unrestricted | $2,500 |
| La Cocina Inc | General & Unrestricted | $2,250 |
| President and Fellows of Harvard College | General & Unrestricted | $1,000 |
| Trustees of Princeton University | General & Unrestricted | $1,000 |
Officers and trustees
- David Li Yuan
- Grace Yuan
Questions people ask
Does Tidemark 10 Foundation accept grant applications?
No. Its IRS filing says it only makes contributions to preselected organizations.
How much does Tidemark 10 Foundation give?
$1.4 million in tax year 2025, across 16 grants, with a typical grant of $7,860.
Who runs Tidemark 10 Foundation?
Its 2025 filing lists David Li Yuan (Dir) and Grace Yuan (Dir, Pres, Sec, Treas).
What does Tidemark 10 Foundation fund?
Based on its grants, mainly environment and conservation, education and human services.