Tidemark 10 Foundation
Private foundation · Wilmington, DE · EIN 85-4039046 · reported 2023–2025
19grants reported
$5,720median award
$2,500lower quartile
$1,000smallest grant
$2.4Mtotal paid
10states reached
3years giving
Gives every year. This foundation reported grants in 2023, 2024, 2025. A funder that shows up year after year is worth a letter even if this year is a no.
Where to write
Foundation Source 501 Silverside RD
Wilmington, DE 19809-0000
Address as registered with the IRS. Most foundations this size have no website and no application form, which is not a dead end: a short letter to this address is the whole process, and almost nobody sends one.
This address is a trust department, not an office. 1,863 other foundations file from the same address, which means a bank or a management company administers the trust. Put the full legal name of the fund and its EIN at the top of the letter, or it lands in a pile with thousands of others and nobody knows which fund you are writing about.
Who they funded
| Recipient and stated purpose | Where | Amount |
|---|---|---|
| Stanford University FOR THE CENTER FOR OCEAN SOLUTIONS | Stanford, CA | $1,000,000 |
| Schwab Charitable Fund | Lone Tree, CO | $1,000,000 |
| Fidelity Investments Charitable Gift Fund | Boston, MA | $300,000 |
| Nature Conservancy California Oceans Program | Arlington, VA | $20,000 |
| Carnegie Endowment for International Peace | Washington, DC | $10,000 |
| KQED Inc | San Francisco, CA | $10,000 |
| Natural Resources Defense Council Inc | New York, NY | $10,000 |
| PBS Foundation | Arlington, VA | $10,000 |
| Refed Inc | Chicago, IL | $10,000 |
| Sustainable Surf | Manhattan Bch, CA | $5,720 |
| Los Angeles Fire Department Foundation LA Wildfire Relief | Los Angeles, CA | $5,000 |
| World Central Kitchen Incorporated LA Wildfire Relief | Washington, DC | $5,000 |
| Noras Gift Foundation Inc | Houston, TX | $5,000 |
| American National Red Cross LA Wildfire Relief | Boone, IA | $4,500 |
| Sustainable Surf | Manhattan Bch, CA | $3,674 |
| Lifemoves | Santa Clara, CA | $2,500 |
| LA Cocina Inc | San Francisco, CA | $2,250 |
| President and Fellows of Harvard College | Boston, MA | $1,000 |
| Trustees of Princeton University | Princeton, NJ | $1,000 |
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