Tidemark 10 Foundation
Invitation OnlyWilmington, Delaware · EIN 85-4039046 · Private foundation
Grants paid (2025)$1.4M
Organizations funded16
Typical grant$5,720
Total assets$11.4M
Half of its grants to organizations were between $2,500 and $10,000.
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 |
|---|---|---|---|
| Stanford University | Stanford, CA | For the center for ocean solutions | $1,000,000 |
| Fidelity Investments Charitable Gift Fund | Boston, MA | General & unrestricted | $300,000 |
| Nature Conservancy | Arlington, VA | California Oceans Program | $20,000 |
| Carnegie Endowment for International Peace | Washington, DC | General & Unrestricted | $10,000 |
| Kqed Inc | San Francisco, CA | General & Unrestricted | $10,000 |
| Natural Resources Defense Council Inc | New York, NY | General & Unrestricted | $10,000 |
| Pbs Foundation | Arlington, VA | General & Unrestricted | $10,000 |
| Refed Inc | Chicago, IL | General & Unrestricted | $10,000 |
| Sustainable Surf | Manhattan Bch, CA | General & Unrestricted | $5,720 |
| Los Angeles Fire Department Foundation | Los Angeles, CA | LA Wildfire Relief | $5,000 |
| World Central Kitchen Incorporated | Washington, DC | LA Wildfire Relief | $5,000 |
| American National Red Cross | Boone, IA | LA Wildfire Relief | $4,500 |
| Lifemoves | Santa Clara, CA | General & Unrestricted | $2,500 |
| LA Cocina Inc | San Francisco, CA | General & Unrestricted | $2,250 |
| President and Fellows of Harvard College | Boston, MA | General & Unrestricted | $1,000 |
| Trustees of Princeton University | Princeton, NJ | General & Unrestricted | $1,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $1,396,970 | 16 |
| 2024 | $8,674 | 2 |
| 2023 | $1,000,000 | 1 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 1, 2026 - IRS e-file batch, object ID 202621219349100542
- IRS Tax Exempt Organization Search for EIN 85-4039046
- 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.