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· Private foundation

Storm Castle Foundation

Its FY2024 filing reports that it accepted unsolicited grant applications.

$764k
Granted FY2024still arriving
38
Grants FY2024still arriving
12
States reached
$100k
Largest
01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2024.

Education$5.3MReligion$610kArts & Culture$282kPhilanthropy$174kHealth$148kInternational$125kRecreation & Sports$108kEnvironment$43kOther$0
02FY2024 · 38 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k16 grants · $59k
  • $10k–50k17 grants · $355k
  • $50k–250k5 grants · $350k
$10,000
Median grant
12
States reached
$29M
Total assets
Largest grants
RecipientAmount
PENINSULA BRIDGE$100,000
HARVARD LAW SCHOOL$100,000
UNIVERSITY OF MICHIGAN$50,000
BOWDOIN COLLEGE$50,000
MAYO FOUNDATION$50,000
STPAULS EPISCOPAL CHURCH$35,000
YALE UNIVERSITY$30,000
STANFORD UNIVERSITY$30,000
DARTMOUTH COLLEGE$30,000
SECOND HARVEST FOOD BANK$25,000
Individual grant recipient$25,000
INTERNATIONAL RESCUE$25,000
LIFE MOVES$20,000
TEACH FOR AMERICA$20,000
THE SMITHSONIAN INSTITUTION$20,000
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 (FY20–24, $10k) land where the poverty rate runs at 14%, against an area that typically sits at 10%. 50% of those dollars go to grantees based in above-average-need neighborhoods. Its grants spread fairly evenly across need levels.

area typical 10%THIRD OPTION FOUNDATION: $5k → 6%ELLIS MARSALIS CENTER FOR MUSIC: $5k → 23%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

ME
NH
MT
MN
MI
NY
MA
PA
CT
CA
CO
NE
VA
MD
NC
DC
LA
AL
GA
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.

95%of every dollar goes to organizations it has funded before.
$5.8M · 38 repeat orgs$322k to everyone else

Grantees it renews have grown median revenue +35% since the first grant, against +16% for those funded once.

38 repeat relationships: 30 still active in FY2024, 8 since wound down; 5 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

38
16

Total granted

$5.8M
$250k

Median revenue growth · since first grant

+35%
+16%

Still filing today

61%
63%

New vs renewed · share of each year

In FY2024, 90% of grant dollars renewed an existing relationship; $72k went to new ones.

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

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

’20’21’22’23’24
Arts & CultureEducationEnvironmentHealthPhilanthropyCivil RightsOther
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

  • BC
    Bowdoin College
    5× · 2020–2024 · $3.2M · revenue +38%
  • TP
    THE PENINSULA BRIDGE PROGRAM
    4× · 2020–2024 · $400k · revenue +59%
  • EI
    Episcopal Impact Fund FKA Episcopal Charities
    3× · 2020–2022 · $150k · revenue +20%

Funded once

  • UO
    US OLYMPIC COMMITTEE
    one grant, 2021 · $103k
  • BS
    BIG SKY SCHOOL DISTRICT
    one grant, 2021 · $50k
  • EQUAL JUSTICE INITIATIVE
    one grant, 2020 · $30k · revenue -66%
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
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
2
Boston Architectural College

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

—
3
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
4
California Academy of Sciences

The academy is a renowned scientific and educational institution with a mission to regenerate the natural world through science, learning, and collaboration. based in san francisco's golden gate park, it is home to a world-class aquarium,…

Arts & Culture
5
The Trustees of Princeton University

Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…

Education
6
President and Fellows of Harvard College

Undergraduate, graduate, and professional education and research across a broad array of academic domains.

Education
7
Pomona College

Throughout its history, pomona college has educated men and women of exceptional promise. we gather individuals, regardless of financial circumstances, into a small residential community that is strongly rooted in southern california yet…

Education
8
University of Southern California

The central mission of the university of southern california is the development of human beings and society as a whole through the cultivation and enrichment of the human mind and spirit. the principal means by which our mission is…

Education
9
Museum of Modern Art

The Museum of Modern Art is a private, non-profit institution chartered by the State of New York Department of Education in 1929 to foster public awareness of modern and contemporary art. (Continued in Schedule O)

Arts & Culture
10
Lowell Observatory

The mission of lowell observatory is to pursue the study of astronomy, especially the study of our solar system and its evolution; to conduct pure research in astronomical phenomena; and to maintain quality public education and outreach…

Science & Tech
11
Trustees of Tufts College

Education and Research

Education
12
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
How this is measured
The grantee most central to the portfolio’s shape is San Francisco Symphony; the most unlike its peers is Piedmont Triad Charitable Foundation D/B/a Wyndham Championship. 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

40 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. 40 of the 63 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)
6
Early backer (in before they grew)
40/40
Grantees still filing
31/40
Grew since first funded

Where the money sits, by cause and then by grantee

Bowdoin College: $3,206,200 · EducationBowdoin CollegeTrustees of Dartmouth College: $696,000 · EducationTrustees of Dartmouth College+6 more: $285,654 · Education+6 moreTHE PENINSULA BRIDGE PROGRAM: $400,000 · OtherTHE PENINSULA BRIDGE PROGRAMHARVARD LAW SCHOOL: $374,507 · OtherHARVARD LAW SCHOOLIndividual grant recipient: $275,000 · OtherIndividual grant recipientSTPAULS EPISCOPAL CHURCH: $185,000 · OtherSTPAULS EPISCOPAL CHURCHYC COMMUNITY FOUNDATION: $138,333 · OtherYC COMMUNITY FOUNDATIONUS OLYMPIC COMMITTEE: $103,000 · OtherYALE UNIVERSITY: $90,000 · OtherUniversity of Michigan: $75,000 · Other+31 more: $493,039 · Other+31 moreSAN FRANCISCO MUSEUM OF MODERN ART: $50,000 · Arts & CultureSMITHSONIAN INSTITUTION: $50,000 · Arts & CultureSAN FRANCISCO SYMPHONY: $40,000 · Arts & CultureAMERICAN CONSERVATORY THEATRE FOUNDATION: $35,000 · Arts & CultureCORPORATION OF THE FINE ARTS MUSEUMS: $30,000 · Arts & CultureSAN FRANCISCO BALLET ASSOCIATION: $12,500 · Arts & Culture+2 more: $4,500 · Arts & CultureEpiscopal Impact Fund FKA Episcopal Charities: $150,000 · ReligionInternational Rescue Committee INC: $125,000 · InternationalFRIENDS OF BIG SKY EDUCATION: $20,000 · PhilanthropyEagle Mount: $20,000 · PhilanthropyST BALDRICK'S FOUNDATION INC: $10,000 · Philanthropy+1 more: $1,000 · PhilanthropyEQUAL JUSTICE INITIATIVE: $30,000 · Civil RightsAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $10,000 · Civil Rights
Education$4,187,854Other$2,133,879Arts & Culture$222,000Religion$150,000International$125,000Philanthropy$51,000Civil Rights$40,000

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 budgetBowdoin College: $3,206,200 over 5y, 0.6% of budgetTrustees of Dartmouth College: $696,000 over 3y, 0.0% of budgetTHE PENINSULA BRIDGE PROGRAM: $400,000 over 4y, 3.1% of budgetEpiscopal Impact Fund FKA Episcopal Charities: $150,000 over 3y, 3.8% of budgetInternational Rescue Committee INC: $125,000 over 5y, 0.0% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $120,000 over 4y, 0.0% of budgetUniversity of Michigan: $75,000 over 2y, 10% of budgetTeach for America Inc: $50,365 over 4y, 0.0% of budgetHILLSBOROUGH SCHOOLS FOUNDATION: $50,089 over 4y, 0.3% of budgetSAN FRANCISCO MUSEUM OF MODERN ART: $50,000 over 4y, 0.0% of budgetSMITHSONIAN INSTITUTION: $50,000 over 4y, 0.0% of budgetCRYSTAL SPRINGS UPLANDS SCHOOL: $45,000 over 3y, 0.0% of budgetLIFEMOVES: $40,000 over 3y, 0.0% of budgetSAN FRANCISCO SYMPHONY: $40,000 over 5y, 0.0% of budgetAMERICAN CONSERVATORY THEATRE FOUNDATION: $35,000 over 5y, 0.1% of budgetEQUAL JUSTICE INITIATIVE: $30,000 over 1y, 0.0% of budgetCORPORATION OF THE FINE ARTS MUSEUMS: $30,000 over 4y, 0.0% of budgetGALLATIN VALLEY LAND TRUST: $20,000 over 4y, 0.2% of budgetFRIENDS OF BIG SKY EDUCATION: $20,000 over 3y, 0.8% of budgetEagle Mount: $20,000 over 4y, 0.2% of budgetMONTEREY BAY AQUARIUM FOUNDATION: $17,500 over 4y, 0.0% of budgetSAN FRANCISCO BALLET ASSOCIATION: $12,500 over 2y, 0.0% of budgetPIEDMONT TRIAD CHARITABLE FOUNDATION D/B/A WYNDHAM CHAMPIONSHIP: $12,300 over 1y, 0.1% of budgetFOUNDATION FOR A COLLEGE EDUCATION: $10,200 over 2y, 0.4% of budgetSOUTHERN POVERTY LAW CENTER INC: $10,000 over 1y, 0.0% of budgetAmerican Heart Association Inc: $10,000 over 1y, 0.0% of budgetAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $10,000 over 1y, 0.0% of budgetST BALDRICK'S FOUNDATION INC: $10,000 over 1y, 0.0% of budgetJUMPSTART FOR YOUNG CHILDREN INC: $10,000 over 2y, 0.0% of budgetMUSEUM OF THE ROCKIES INC: $10,000 over 4y, 0.1% of budgetELLIS MARSALIS CENTER FOR MUSIC INC: $5,000 over 1y, 0.3% of budgetSave The Bay: $5,000 over 1y, 0.1% of budgetTHIRD OPTION FOUNDATION: $4,999 over 1y, 0.0% of budgetTHE FILM COLLABORATIVE INC: $2,500 over 1y, 0.0% of budgetASIAN ART MUSEUM FOUNDATION OF SAN FRANCISCO: $2,000 over 2y, 0.0% of budgetSPANISH PEAKS COMMUNITY FOUNDATION: $2,000 over 1y, 0.3% of budgetPLANNED PARENTHOOD MAR MONTE INC: $1,000 over 1y, 0.0% of budgetGolden Gate Bird Alliance Prev Golden Gate Audubon Society Inc: $1,000 over 1y, 0.1% of budgetPLAYERS PHILANTHROPY FUND INC: $1,000 over 1y, 0.0% of budgetAMERICAN CANCER SOCIETY 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 Bowdoin College ↗
  • Who funds Trustees of Dartmouth College ↗
  • Who funds THE PENINSULA BRIDGE PROGRAM ↗
  • Who funds Episcopal Impact Fund FKA Episcopal Charities ↗
  • Who funds International Rescue Committee INC ↗
  • Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
  • Who funds University of Michigan ↗
  • Who funds Teach for America Inc ↗
  • Who funds HILLSBOROUGH SCHOOLS FOUNDATION ↗
  • Who funds SAN FRANCISCO MUSEUM OF MODERN ART ↗
  • Who funds SMITHSONIAN INSTITUTION ↗
  • Who funds CRYSTAL SPRINGS UPLANDS SCHOOL ↗
  • Who funds LIFEMOVES ↗
  • Who funds SAN FRANCISCO SYMPHONY ↗
  • Who funds AMERICAN CONSERVATORY THEATRE FOUNDATION ↗
  • Who funds EQUAL JUSTICE INITIATIVE ↗
  • Who funds CORPORATION OF THE FINE ARTS MUSEUMS ↗
  • Who funds GALLATIN VALLEY LAND TRUST ↗
  • Who funds FRIENDS OF BIG SKY EDUCATION ↗
  • Who funds Eagle Mount ↗
  • Who funds MONTEREY BAY AQUARIUM FOUNDATION ↗
  • Who funds SAN FRANCISCO BALLET ASSOCIATION ↗
  • Who funds PIEDMONT TRIAD CHARITABLE FOUNDATION D/B/A WYNDHAM CHAMPIONSHIP ↗
  • Who funds FOUNDATION FOR A COLLEGE EDUCATION ↗
  • Who funds SOUTHERN POVERTY LAW CENTER INC ↗

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.

Silicon Valley Community FoundationCA13.2× affinity5 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Silicon Valley Community Foundation · National Philanthropic Trust · The Goldman Sachs Charitable Gift Fund · The San Francisco Foundation · Morgan Stanley Global Impact Funding Trust Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Charities Aid Foundation America · American Endowment Foundation · Vanguard Charitable Endowment Program · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · American Online Giving Foundation Inc

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 Storm Castle Foundation funds: left to right is the share of its income from government, bottom to top the share from Storm Castle Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%1%4%8%15%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →
    no gov moneyreceives it· size = income
    1get no government money at all
    8report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    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.
    05Through Plinth

    Warm introductions · Powered by PlinthPlus

    How do I get to Storm Castle Foundation?

    Find your warmest path to Storm Castle Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

    Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

    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 63 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Source object · view filing

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