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The Endurance Fund at a glance

· Private foundation

The Endurance Fund

Its FY2024 filing reports that it accepted unsolicited grant applications.

$260k
Granted FY2023
31
Grants FY2023
8
States reached
$60k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead

Read this first · the figures below need context

53% of The Endurance Fund’s FY2024 grant dollars went to Marin Community Foundation, not to grantees.

Its money now reaches organizations through that sponsor, which does not report who recommended each grant. FY2024 names 30 organizations directly, so a portfolio cannot be read from it. Everything below is therefore FY2023, the last year The Endurance Fund named its own grantees at scale: 18 organizations, $260k. It is dated, not current.

Organizations named directly on the return

33
’17
31
’18
6
’19
9
’20
24
’21
25
’22
18
’23
30
’24

Amber years are those where most dollars went to a sponsor.

01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Philanthropy$6.8MHuman Services$550kEnvironment$228kEducation$158kHealth$139kRecreation & Sports$71kFood & Nutrition$53kPublic Safety & Disaster$40kOther$0
02FY2023 · 31 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2023

  • Under $10k24 grants · $51k
  • $10k–50k4 grants · $50k
  • $50k–250k3 grants · $160k
$2,000
Median grant
8
States reached
$0
Total assets
Largest grants
RecipientAmount
Vanguard Charitable Program$60,000
San Geronimo Valley Community Cente$50,000
Individual grant recipient$50,000
San Geronimo Valley Community Cente$17,400
San Geronimo Valley Community Cente$12,363
San Geronimo Valley Community Cente$10,000
Lagunitas School Foundation - LEAP$10,000
San Geronimo Valley Community Cente$8,177
Marin Country Day School$5,000
Pamona College$5,000
Branson School$5,000
Trustees for Alaska$5,000
San Geronimo Valley Lions$4,500
San Geronimo Valley Community Cente$2,736
Cystic Fibrosis Foundation$2,500
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY17–24, $24k) land where the poverty rate runs at 8%, against an area that typically sits at 10%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 10%West Marin Senior Services: $1k → 8%West Marin Senior Services: $1k → 8%West Marin Senior Services: $1k → 8%West Marin Senior Services: $1k → 8%West Marin Senior Services: $500 → 8%West Marin Senior Services: $500 → 8%West Marin Senior Services: $500 → 8%West Marin Senior Services: $250 → 8%Osher Marin Jewish Community Center: $3k → 8%Osher Marin Jewish Community Center: $3k → 8%Osher Marin Jewish Community Center: $2k → 8%Osher Marin Jewish Community Center: $2k → 8%Osher Marin Jewish Community Center: $500 → 8%St Vincent de Paul Society: $2k → 8%Vivalon: $1k → 8%Vivalon: $1k → 8%Parent Services Project: $1k → 8%Vivalon: $1k → 8%Vivalon: $1k → 8%St Vincent de Paul Society: $1k → 8%St Vincent de Paul Society: $500 → 8%Vivalon: $500 → 8%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

AK
ME
WA
IL
MI
NY
MA
OR
PA
CT
RI
CA
MD
DC
AL
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

98%of every dollar goes to organizations it has funded before.
$4.7M · 51 repeat orgs$99k to everyone else

Grantees it renews have grown median revenue +61% since the first grant, against +27% for those funded once.

51 repeat relationships: 21 still active in FY2023, 30 since wound down; 13 grantees were first funded in FY2023 (too recent to call). Read against FY2023, the last year this funder named its own grantees directly; its giving has since run through a sponsor, which reports no donor behind each grant.

How the two cohorts compare

Re-uppedFunded once

Organizations

51
21

Total granted

$4.7M
$87k

Median revenue growth · since first grant

+61%
+27%

Still filing today

78%
71%

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $6k went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24
EnvironmentArts & CultureEducationHuman ServicesHealthHousing & ShelterOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • SG
    San Geronimo Valley Community Center
    7× · 2017–2024 · $526k · revenue +61%
  • TP
    The Pacific Forest Trust Incorporated
    5× · 2017–2024 · $93k · revenue +293%
  • 1D
    10000 DEGREES
    2× · 2020–2021 · $35k · revenue +105%

Funded once

  • TG
    The Granite Fund
    one grant, 2021 · $30k
  • MH
    Meli Hua Fund
    one grant, 2021 · $30k
  • BIRD ALLIANCE OF OREGON INCgraduated
    one grant, 2017 · $10k · revenue +99%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
The Union of Concerned Scientists Inc

The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.

International
2
Aquarium of the Pacific Corporation

The aquarium of the pacific's mission is to instill a sense of wonder, respect, and stewardship for the pacific ocean, its inhabitants, and ecosystems.

Animals
3
Marin Humane Society

Marin humane transforms lives through exceptional animal care, humane education, and advocacy. every day, marin humane inspires compassion and positive relationships between people and animals.

Animals
4
San Francisco Bay Bird Observatory

The San Francisco Bay Bird Observatory is dedicated to the conservation of birds and their habitats through science and outreach.

Environment
5
Community Foundation Santa Cruz County

To promote philanthropy to make santa cruz county a better place to live, now and in the future.we bring together people, ideas, and resources to inspire philanthropy and accomplish great things.

Philanthropy
6
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

—
7
California Dental Association Foundation

The foundation's mission is to improve the oral health of all californians by supporting the dental profession and its efforts to meet community needs.

Science & Tech
8
California Dental Association

The california dental association is committed to the success of our members in service to their patients and the public.

Community Improvement
9
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
10
Npr Foundation

The npr foundation ("foundation") is organized and operated exclusively for the benefit of its sole supported organization, national public radio, inc. ("npr inc."). the foundation supports npr inc. through various activities such as…

—
11
Ucsf Foundation Investment Company

The organization provides professional investment management services for endowed gifts and financial assets entrusted to the ucsf foundation.

Education
12
Arizona Community Foundation

To lead, serve and collaborate to mobilize enduring philanthropy for a better arizona.

Philanthropy
How this is measured
The grantee most central to the portfolio’s shape is Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma; the most unlike its peers is Signal Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

68 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 68 of the 90 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
18
Early backer (in before they grew)
68/68
Grantees still filing
56/68
Grew since first funded

Where the money sits, by cause and then by grantee

Vanguard Charitable Program: $3,399,590 · OtherVanguard Charitable ProgramSan Geronimo Valley Community Center: $525,832 · OtherSan Geronimo Valley Community CenterIndividual grant recipient: $179,500 · Other+51 more: $416,568 · Other+51 moreMARIN COMMUNITY FOUNDATION: $3,335,743 · PhilanthropyMARIN COMMUNITY FOUNDATION+3 more: $870 · Philanthropy10000 DEGREES: $35,000 · EducationKINGSWOOD OXFORD SCHOOL INC: $20,000 · EducationPOMONA COLLEGE: $20,000 · EducationMARIN COUNTRY DAY SCHOOL: $20,000 · EducationTHE BRANSON SCHOOL: $20,000 · EducationHILLSBOROUGH SCHOOLS FOUNDATION: $4,800 · Education+4 more: $4,500 · EducationALASKA CONSERVATION FOUNDATION: $20,085 · EnvironmentTRUSTEES FOR ALASKA: $14,000 · EnvironmentBIRD ALLIANCE OF OREGON INC: $10,000 · EnvironmentNEW VENTURE FUND: $10,000 · EnvironmentEARTHJUSTICE: $6,000 · Environment+8 more: $7,200 · EnvironmentMARIN AGRICULTURAL LAND TRUST: $38,000 · Food & NutritionREDWOOD EMPIRE FOOD BANK: $9,250 · Food & NutritionBERNARD OSHER MARIN JEWISH COMMUNITY CENTER: $9,500 · Human ServicesWest Marin Senior Services: $5,750 · Human ServicesVivalon: $4,570 · Human ServicesST VINCENT DE PAUL SOCIETY DISTRICT COUNCIL OF MARIN COUNTY: $3,000 · Human ServicesPARENT SERVICES PROJECT: $1,000 · Human ServicesCold Climate Housing Research Center: $17,496 · Housing & ShelterHABITAT FOR HUMANITY OF SONOMA COUNTY: $750 · Housing & Shelter
Other$4,521,490Philanthropy$3,336,613Education$124,300Environment$67,285Food & Nutrition$47,250Human Services$23,820Housing & Shelter$18,246

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetMARIN COMMUNITY FOUNDATION: $3,335,743 over 1y, 1.3% of budgetSan Geronimo Valley Community Center: $525,832 over 7y, 7.5% of budgetThe Pacific Forest Trust Incorporated: $92,500 over 5y, 0.6% of budgetMARIN AGRICULTURAL LAND TRUST: $38,000 over 4y, 0.4% of budget10000 DEGREES: $35,000 over 2y, 0.2% of budgetALASKA CONSERVATION FOUNDATION: $20,085 over 3y, 0.4% of budgetKINGSWOOD OXFORD SCHOOL INC: $20,000 over 2y, 0.0% of budgetPOMONA COLLEGE: $20,000 over 4y, 0.0% of budgetMARIN COUNTRY DAY SCHOOL: $20,000 over 4y, 0.0% of budgetTHE BRANSON SCHOOL: $20,000 over 4y, 0.0% of budgetCold Climate Housing Research Center: $17,496 over 2y, 0.8% of budgetTRUSTEES FOR ALASKA: $14,000 over 4y, 0.3% of budgetBIRD ALLIANCE OF OREGON INC: $10,000 over 1y, 0.3% of budgetNEW VENTURE FUND: $10,000 over 1y, 0.0% of budgetBERNARD OSHER MARIN JEWISH COMMUNITY CENTER: $9,500 over 5y, 0.0% of budgetREDWOOD EMPIRE FOOD BANK: $9,250 over 8y, 0.0% of budgetKQED INC: $6,200 over 3y, 0.0% of budgetEARTHJUSTICE: $6,000 over 4y, 0.0% of budgetSAN FRANCISCO FOOD BANK: $6,000 over 8y, 0.0% of budgetWest Marin Senior Services: $5,750 over 8y, 0.1% of budgetPLANNED PARENTHOOD FEDERATION OF AMERICA INC: $5,000 over 1y, 0.0% of budgetHILLSBOROUGH SCHOOLS FOUNDATION: $4,800 over 2y, 0.1% of budgetVivalon: $4,570 over 5y, 0.0% of budgetAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $4,000 over 4y, 0.0% of budgetMOUNTAIN PLAY ASSOCIATION: $3,750 over 7y, 0.1% of budgetST VINCENT DE PAUL SOCIETY DISTRICT COUNCIL OF MARIN COUNTY: $3,000 over 3y, 0.0% of budgetCYSTIC FIBROSIS FOUNDATION: $3,000 over 2y, 0.0% of budgetTHE ALASKA CENTER EDUCATION FUND: $2,000 over 1y, 0.1% of budgetROSS VALLEY PLAYERS: $1,750 over 4y, 0.2% of budgetUniversity of Chicago: $1,500 over 2y, 0.0% of budgetDOMINICAN UNIVERSITY OF CALIFORNIA: $1,500 over 1y, 0.0% of budgetNATIONAL PARKS CONSERVATION ASSOCIATION: $1,500 over 4y, 0.0% of budgetWIKIMEDIA FOUNDATION INC: $1,250 over 3y, 0.0% of budgetMARIN SYMPHONY ASSOCIATION: $1,250 over 4y, 0.0% of budgetNICASIO VOLUNTEER FIRE DEPT: $1,240 over 5y, 0.2% of budgetMARIN AUDUBON SOCIETY: $1,000 over 2y, 0.2% of budgetLaguna De Santa Rosa Foundation: $1,000 over 2y, 0.1% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $1,000 over 1y, 0.0% of budgetINTERLOCHEN CENTER FOR THE ARTS: $1,000 over 1y, 0.0% of budgetPARENT SERVICES PROJECT: $1,000 over 1y, 0.2% of budgetKidnuz: $1,000 over 1y, 1.4% of budgetNorth Bay BMX Inc: $1,000 over 1y, 0.5% of budgetNicasio Land Preserve: $900 over 4y, 1.1% of budgetHABITAT FOR HUMANITY OF SONOMA COUNTY: $750 over 2y, 0.0% of budgetCALIFORNIA FILM INSTITUTE: $530 over 2y, 0.0% of budgetThe Center for Investigative Reporting formrly Foundation for National Progress: $500 over 1y, 0.0% of budgetENVIRONMENTAL DEFENSE FUND INCORPORATED: $500 over 2y, 0.0% of budgetSOUTHERN POVERTY LAW CENTER INC: $500 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds MARIN COMMUNITY FOUNDATION ↗
  • Who funds San Geronimo Valley Community Center ↗
  • Who funds The Pacific Forest Trust Incorporated ↗
  • Who funds MARIN AGRICULTURAL LAND TRUST ↗
  • Who funds 10000 DEGREES ↗
  • Who funds ALASKA CONSERVATION FOUNDATION ↗
  • Who funds KINGSWOOD OXFORD SCHOOL INC ↗
  • Who funds POMONA COLLEGE ↗
  • Who funds MARIN COUNTRY DAY SCHOOL ↗
  • Who funds THE BRANSON SCHOOL ↗
  • Who funds Cold Climate Housing Research Center ↗
  • Who funds TRUSTEES FOR ALASKA ↗
  • Who funds BIRD ALLIANCE OF OREGON INC ↗
  • Who funds NEW VENTURE FUND ↗
  • Who funds BERNARD OSHER MARIN JEWISH COMMUNITY CENTER ↗
  • Who funds REDWOOD EMPIRE FOOD BANK ↗
  • Who funds KQED INC ↗
  • Who funds EARTHJUSTICE ↗
  • Who funds SAN FRANCISCO FOOD BANK ↗
  • Who funds West Marin Senior Services ↗
  • Who funds PLANNED PARENTHOOD FEDERATION OF AMERICA INC ↗
  • Who funds HILLSBOROUGH SCHOOLS FOUNDATION ↗
  • Who funds Vivalon ↗
  • Who funds AMERICAN CIVIL LIBERTIES UNION FOUNDATION INC ↗
  • Who funds MOUNTAIN PLAY ASSOCIATION ↗
  • Who funds ST VINCENT DE PAUL SOCIETY DISTRICT COUNCIL OF MARIN COUNTY ↗
  • Who funds CYSTIC FIBROSIS FOUNDATION ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Marin Community Found…Leonard & Beryl Buck …The San Francisco Fou…Jewish Community Fede…McNabb FoundationHartford Foundation f…Hobsonlucas Family Fo…Gordon E and Betty I …The Jolson Family Fou…Harbor Point Charitab…Fenwick FoundationIbm International Fou…
Marin Community FoundationCA42.7× affinity22 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Marin Community Foundation · Leonard & Beryl Buck Foundation · The San Francisco Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · McNabb Foundation · Hartford Foundation for Public Giving · Hobsonlucas Family Foundation · Gordon E and Betty I Moore Foundation · The Jolson Family Foundation · Harbor Point Charitable Foundation · Fenwick Foundation · Ibm International Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization The Endurance Fund funds: left to right is the share of its income from government, bottom to top the share from The Endurance Fund. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%1%3%6%10%funder's share of their income ↑0%19%38%56%75%share of the org’s income from government →median 1%
  • Oregon Coast Aquarium Inc: 24% of income from government
  • Berkshire Theatre Group Inc: 1% of income from government
  • Jacob's Pillow Dance Festival Inc: 1% of income from government
  • Bird Alliance of Oregon Inc: 0% of income from government
  • Kingswood Oxford School Inc: 0% of income from government
  • Oregon Shakespeare Festival Association Inc: 0% of income from government
no gov moneyreceives it· size = income
1get no government money at all
18report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–75%
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 90 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2023, released 2023. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Endurance’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home