Private foundation · EIN 85-4039046

Tidemark 10 Foundation

Preselected only

Wilmington, DE

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Tax year 2025 (period ending 2025-12-31) · Filed with IRS 2026 · Data as of 2026-10-24 · View filing on ProPublica · Source: IRS e-file object 202621219349100542
Total assets (EOY)$9,377,937
Grants paid$1,396,970
Typical (median) grant$7,860
Grants listed16
Giving in home state (DE)0%

Grant size distribution

RangeGrants
Under $5K5
$5K–$25K9
$25K–$100K0
$100K+2

Smallest $1,000 · Largest $1,000,000

Geographic focus

CA
73%
MA
22%
VA
2%
DC
1%
NY
1%
IL
1%
IA
0%
NJ
0%

Common purposes

wildfirereliefcenteroceansolutionscaliforniaoceans

Giving history

Tax yearContributions paidTotal assetsGrants listed
2023$1,000,000$1,509,1921
2024$8,674$7,782,0202
2025$1,396,970$9,377,93716

Years shown are the filings ingested so far; more years are added as additional IRS batches are processed.

How to apply

This foundation checked Part XV line 2 of its 990-PF: it only makes contributions to preselected charitable organizations and does not accept unsolicited requests.

Source: 990-PF Part XV line 2, tax year 2025.

Top recipients (tax year 2025)

RecipientLocationPurposeAmount
Stanford UniversitySTANFORD, CAFOR THE CENTER FOR OCEAN SOLUTIONS$1,000,000
Fidelity Investments Charitable Gift FundBOSTON, MAGENERAL & UNRESTRICTED$300,000
Nature ConservancyARLINGTON, VACalifornia Oceans Program$20,000
Carnegie Endowment For International PeaceWASHINGTON, DCGeneral & Unrestricted$10,000
Kqed IncSAN FRANCISCO, CAGeneral & Unrestricted$10,000
Natural Resources Defense Council IncNEW YORK, NYGeneral & Unrestricted$10,000
Pbs FoundationARLINGTON, VAGeneral & Unrestricted$10,000
Refed IncCHICAGO, ILGeneral & Unrestricted$10,000
Sustainable SurfMANHATTAN BCH, CAGeneral & Unrestricted$5,720
Los Angeles Fire Department FoundationLOS ANGELES, CALA Wildfire Relief$5,000
World Central Kitchen IncorporatedWASHINGTON, DCLA Wildfire Relief$5,000
American National Red CrossBOONE, IALA Wildfire Relief$4,500
LifemovesSANTA CLARA, CAGeneral & Unrestricted$2,500
La Cocina IncSAN FRANCISCO, CAGeneral & Unrestricted$2,250
President And Fellows Of Harvard CollegeBOSTON, MAGeneral & Unrestricted$1,000
Trustees Of Princeton UniversityPRINCETON, NJGeneral & Unrestricted$1,000
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