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The Rock Oak Foundation at a glance

· Private foundation

The Rock Oak Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$241k
Granted FY2025still arriving
20
Grants FY2025still arriving
8
States reached
$35k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0196% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2021 to 2025.

Arts & Culture$132kEducation$128kHealth$79kEnvironment$71kScience & Tech$60kCommunity Improvement$40kAnimals$31kHuman Services$25kOther$0
02FY2025 · 20 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k7 grants · $36k
  • $10k–50k13 grants · $205k
$10,000
Median grant
8
States reached
$2.8M
Total assets
Largest grants
RecipientAmount
WESTTOWN$35,000
MET MUSEUM$35,000
CONSERVATION INTERNATIONAL$20,000
KENYON COLLEGEWOOLLAM HOUSE$20,000
BRANDYWINE RIVER MUSEUM$15,000
COLORADO SNOWSPORTS MUSEUM - VAIL 10TH MOUNTAIN DIVISION$10,000
KENNETT AREA COMMUNITY SERVICE (KACS)$10,000
PLANNED PARENTHOOD OF SOUTHERN PA$10,000
PLANNED PARENTHOOD OF DELAWARE$10,000
WRTI$10,000
DELAWARE ART MUSEUM$10,000
WHYY$10,000
SWEET BRIAR COLLEGE$10,000
THE AMERICAN CANCER SOCIETY$7,500
IFAW$6,000
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 (FY24–24, $10k) land where the poverty rate runs at 6%, against an area that typically sits at 9%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 9%KENNETT AREA COMMUNITY SERVICE: $10k → 6%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

NY
MA
OH
PA
NJ
CO
VA
MD
DE
DC
TX
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.

45%of every dollar goes to organizations it has funded before.
$265k · 9 repeat orgs$328k to everyone else

Grantees it renews have grown median revenue +24% since the first grant, against 0% for those funded once.

9 repeat relationships: 5 still active in FY2025, 4 since wound down; 15 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

9
12

Total granted

$265k
$142k

Median revenue growth · since first grant

+24%
0%

Still filing today

56%
67%

New vs renewed · share of each year

In FY2025, 23% of grant dollars renewed an existing relationship; $186k went to new ones.

50%100%’21’22’23’24’25
RenewedFirst-time

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

’21’22’23’24’25
EducationArts & CultureEnvironmentHealthAnimalsHuman ServicesOther
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

  • DA
    DELAWARE ART MUSEUM INC
    3× · 2023–2025 · $45k · revenue +24%
  • PP
    PLANNED PARENTHOOD OF DELAWARE INC
    2× · 2024–2025 · $30k · revenue +38%
  • BC
    Brandywine Conservancy & Museum of Art
    2× · 2022–2024 · $22k · revenue +65%

Funded once

  • NM
    NANTUCKET MARIA MITCHELL ASSOCIATION INgraduated
    one grant, 2023 · $25k · revenue +38%
  • LH
    LENOX HILL HOSPITAL IN HONOR OF DR LON WEINER
    one grant, 2024 · $20k
  • PC
    PHILANDER CHASE CONSERVANCYgraduated
    one grant, 2023 · $20k · revenue +42%
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
Delaware Museum of Nature and Science Inc

The museum is an educational corporation formed to ignite a life-long passion for exploring, discovering, and valuing nature and science.

—
2
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
3
Harvard Conservation Trust

To preserve the unique character and natural resources of harvard.

Environment
4
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
5
Delaware Valley University

See schedule o.we are inspired by the ideals of our founder who, in 1896, emphasized respect for all people and ideas, who honored knowledge with practice, progress and the common good. our historical commitment to experiential learning…

—
6
New York Botanical Garden

The new york botanical garden is a museum of plants and a scientific research center devoted to the study of plants and their uses. it is the garden's mission to improve public understanding of the natural world, horticulture, and the…

Environment
7
American Humane Association

Founded in 1877, american humane association, dba american humane society (american humane) is committed to ensuring the safety, welfare and well-being of animals. our leadership programs are first to serve in promoting and nurturing the…

Animals
8
Wilson College

Wilson college empowers students to be confident and critical thinkers, creative visionaries, effective communicators, honorable leaders, and agents of justice.

Education
9
Zoological Society of Pittsburgh

The zoological society of pittsburgh is dedicated to being a leader in, and significant contributor to, the conservation of endangered and threatened species. the society provides an enjoyable family experience that fosters understanding,…

Animals
10
American Astronomical Society

The american astronomical society (aas), established in 1899, is the major organization of professional astronomers in north america. the basic objective of the aas is to promote the advancement of astronomy and closely related branches of…

Science & Tech
11
Boston Architectural College

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

—
12
Western Pennsylvania Conservancy

The western pennsylvania conservancy protects and restores exceptional places to provide our region with clean waters and healthy forests, wildlife and natural areas for the benefit of present and future generations. the conservancy…

Environment
How this is measured
The grantee most central to the portfolio’s shape is Philander Chase Conservancy; the most unlike its peers is Humane World for Animals Inc. 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

18 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. 18 of the 36 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)
1
Early backer (in before they grew)
18/18
Grantees still filing
6/18
Grew since first funded

Where the money sits, by cause and then by grantee

WESTTOWN SCHOOL: $45,000 · OtherWESTTOWN SCHOOLKENYON COLLEGEWOOLLAM HOUSE: $35,000 · OtherKENYON COLLEGEWOOLLAM HOUSENEXTGENFACE INC: $35,000 · OtherNEXTGENFACE INCWESTTOWN: $35,000 · OtherWESTTOWNMET MUSEUM: $35,000 · OtherMET MUSEUMNANTUCKET MARIA MITCHELL ASSOCIATION IN: $25,000 · OtherNANTUCKET MARIA MITCHELL ASSOCIATION INPLANNED PARENTHOOD OF SOUTHERN PA: $20,000 · OtherPLANNED PARENTHOOD OF SOUTHERN PALENOX HILL HOSPITAL IN HONOR OF DR LON WEINER: $20,000 · OtherLENOX HILL HOSPITAL IN HONOR OF DR LON WEINERBRANDYWINE RIVER MUSEUM: $15,000 · Other+10 more: $72,500 · Other+10 moreDELAWARE ART MUSEUM INC: $45,000 · Arts & CultureDELAWARE ART …Brandywine Conservancy & Museum of Art: $21,500 · Arts & CultureBrandywine Co…American Museum of Natural History: $5,000 · Arts & CultureAmerican Muse…TOWER HILL SCHOOL ASSOCIATION: $27,500 · EducationTOWER HILL S…PHILANDER CHASE CONSERVANCY: $20,000 · EducationPHILANDER CH…Temple University - Of The Commonwealth System of Higher Education: $10,000 · EducationTemple Unive…SWEET BRIAR INSTITUTE: $10,000 · EducationSWEET BRIAR …CONSERVATION INTERNATIONAL FOUNDATION: $20,000 · EnvironmentDELAWARE NATURE SOCIETY INC: $15,000 · EnvironmentWillistown Conservation Trust Inc: $7,000 · EnvironmentPLANNED PARENTHOOD OF DELAWARE INC: $30,000 · HealthAMERICAN CANCER SOCIETY INC: $7,500 · Health+1 more: $1,000 · HealthPeaceful Valley Donkey Rescue Inc: $10,000 · AnimalsHumane World for Animals Inc: $10,000 · AnimalsGREENMORE FARM ANIMAL RESCUE INC: $5,500 · AnimalsKENNETT AREA COMMUNITY SERVICE: $10,000 · Human Services
Other$337,500Arts & Culture$71,500Education$67,500Environment$42,000Health$38,500Animals$25,500Human Services$10,000

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 budgetDELAWARE ART MUSEUM INC: $45,000 over 3y, 0.5% of budgetPLANNED PARENTHOOD OF DELAWARE INC: $30,000 over 2y, 0.4% of budgetTOWER HILL SCHOOL ASSOCIATION: $27,500 over 3y, 0.0% of budgetNANTUCKET MARIA MITCHELL ASSOCIATION IN: $25,000 over 1y, 0.9% of budgetBrandywine Conservancy & Museum of Art: $21,500 over 2y, 0.1% of budgetPHILANDER CHASE CONSERVANCY: $20,000 over 1y, 3.1% of budgetCONSERVATION INTERNATIONAL FOUNDATION: $20,000 over 1y, 0.0% of budgetDELAWARE NATURE SOCIETY INC: $15,000 over 1y, 0.3% of budgetPeaceful Valley Donkey Rescue Inc: $10,000 over 1y, 0.1% of budgetKENNETT AREA COMMUNITY SERVICE: $10,000 over 1y, 0.1% of budgetTemple University - Of The Commonwealth System of Higher Education: $10,000 over 1y, 0.0% of budgetHumane World for Animals Inc: $10,000 over 1y, 0.0% of budgetSWEET BRIAR INSTITUTE: $10,000 over 1y, 0.0% of budgetAMERICAN CANCER SOCIETY INC: $7,500 over 1y, 0.0% of budgetWillistown Conservation Trust Inc: $7,000 over 1y, 0.3% of budgetGREENMORE FARM ANIMAL RESCUE INC: $5,500 over 2y, 1.5% of budgetAmerican Museum of Natural History: $5,000 over 1y, 0.0% of budgetNORTHWELL HEALTH FOUNDATION: $1,000 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.

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.

The Starrett Foundati…Delaware Community Fo…Jpmorgan Chase Founda…Nyssa FoundationUnited Way of DelawareLongwood Foundation I…The William Penn Foun…The Philadelphia Foun…The Bank of America C…The Pfizer Foundation…Vanguard Charitable E…The Blackbaud Giving …
The Starrett FoundationDE20× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Starrett Foundation · Delaware Community Foundation Inc · Jpmorgan Chase Foundation · Nyssa Foundation · United Way of Delaware · Longwood Foundation Inc · The William Penn Foundation · The Philadelphia Foundation · The Bank of America Charitable Foundation Inc · The Pfizer Foundation Inc · Vanguard Charitable Endowment Program · The Blackbaud Giving Fund

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

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%6%13%19%25%share of the org’s income from government →median 9%
  • Planned Parenthood of Delaware Inc: 19% of income from government
  • Delaware Nature Society Inc: 13% of income from government
  • Nantucket Maria Mitchell Association in: 9% of income from government
  • Delaware Art Museum Inc: 8% of income from government
  • Tower Hill School Association: 0% of income from government
no gov moneyreceives it· size = income
0get no government money at all
1report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–25%
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 36 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Rock Oak’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