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William P & Gertrude Schweitzer at a glance

· Private foundation

William P & Gertrude Schweitzer

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.

$160k
Granted FY2025still arriving
11
Grants FY2025still arriving
4
States reached
$70k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0195% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Arts & Culture$787kAnimals$297kScience & Tech$196kEnvironment$91kRecreation & Sports$25kPublic Safety & Disaster$20kHealth$17kInternational$11kOther$0
02FY2025 · 11 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k7 grants · $20k
  • $10k–50k3 grants · $70k
  • $50k–250k1 grant · $70k
$5,000
Median grant
4
States reached
$3.2M
Total assets
Largest grants
RecipientAmount
MUSEUM OF NATURAL HISTORY$70,000
METROPOLITAN MUSEUM OF ART$30,000
CARNEGIE HALL SOCIETY$30,000
THE RAPTOR TRUST$10,000
DANNYS AND DONS RESCUE$6,290
FRIENDS OF WHITTEMORE$5,000
HARLEYS DREAM$3,000
ST HUBERTS ANIMAL WELFARE CENTER$2,210
NJ CONSERVATION FOUNDATION$1,500
CORNELL LAB OR ORINTHOLOGY$1,000
SHAKESPEARE THEATRE OF NJ$1,000
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:

Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 16%, against an area that typically sits at 8%. 90% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 8%SCARSDALE VOLUNTEER AMBULENCE CORPS: $20k → 9%WILDLIFE CONSERVATION: $20k → 28%DANNY AND RON RESCUE: $57k → 12%THE RAPTOR TRUST: $10k → 4%NEW JERSEY CONSERVATION FOUNDATION: $25k → 5%global impact: $10k → 9%METRO MUSEUM OF ART: $12k → 17%WILDLIFE CONSERVATION: $10k → 28%DANNY AND RON'S RESCUE: $40k → 12%NEW JERSEY CONSERVATION FOUNDATION: $25k → 5%METRO MUSEUM OF ART: $10k → 17%WILDLIFE CONSERVATION: $10k → 28%DANNY AND RON'S RESCUE: $12k → 12%NEW JERSEY CONSERVATION FOUNDATION: $15k → 5%METRO MUSEUM OF ART: $10k → 17%WILDLIFE CONSERVATION: $10k → 28%DANNY AND RON'S RESCUE: $10k → 12%NEW JERSEY CONSERVATION FOUNDATION: $10k → 5%METRO MUSEUM OF ART: $10k → 17%WILDLIFE CONSERVATION: $10k → 28%METROPOLITAN MUSEUM OF ART: $30k → 17%CARNEGIE HALL SOCIETY: $30k → 17%CARNEGIE HALL SOCIETY: $30k → 17%CARNEGIE HALL SOCIETY: $30k → 17%CARNEGIE HALL SOCIETY: $30k → 17%CARNEGIE HALL SOCIETY: $30k → 17%carnegie hall: $25k → 17%carnegie hall: $25k → 17%CARNEGIE HALL SOCIETY: $25k → 17%CARNEGIE HALL SOCIETY: $25k → 17%EQUINE ASSOCIATES: $10k → 17%MUSEUM OF NATURAL HISTORY: $70k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $60k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $30k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $50k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $25k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $50k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $25k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $50k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $25k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $50k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $25k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $50k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $25k → 17%AMERICAN MUSEUM OF NATURAL HISTORY: $50k → 17%AMER COMM FOR WEITZMAN INST OF SCIE: $20k → 17%AMER MUSEUM OF NAT HISTORY: $35k → 17%AMER COMM FOR WEITZMAN INS OF SCIEN: $20k → 17%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
OR
PA
NJ
CA
UT
CO
KY
VA
SC
DC
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.

80%of every dollar goes to organizations it has funded before.
$1.2M · 19 repeat orgs$294k to everyone else

Grantees it renews have grown median revenue +44% since the first grant, against +32% for those funded once.

19 repeat relationships: 5 still active in FY2025, 14 since wound down; 6 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

19
17

Total granted

$1.2M
$181k

Median revenue growth · since first grant

+44%
+32%

Still filing today

58%
47%

New vs renewed · share of each year

In FY2025, 29% of grant dollars renewed an existing relationship; $113k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
AnimalsRecreation & SportsArts & CultureEnvironmentEducationHuman 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

  • DR
    DANNY & RONS RESCUE
    7× · 2017–2023 · $81k · revenue +287%
  • WC
    Wildlife Conservation Society
    6× · 2017–2022 · $62k · revenue +59%
  • TC
    THE CARNEGIE HALL CORPORATION
    2× · 2017–2019 · $50k · revenue +176%

Funded once

  • DA
    DANNY AND RON RESCUE
    one grant, 2024 · $57k
  • AM
    AMER MUSEUM OF NAT HISTORY
    one grant, 2024 · $35k
  • AC
    AMER COMM FOR WEITZMAN INS OF SCIEN
    one grant, 2024 · $20k
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
Global Animal Partnership
Animals
2
World Animal Protection

World animal protection is a global organization working to end factory farming and wildlife exploitation. we expose cruel systems, promote animal-friendly alternatives, and influence policy change. for over 75 years, we've been rewriting…

Animals
3
Humane World for Animals International

HUMANE WORLD FOR ANIMALS INTERNATIONAL, FKA HUMANE SOCIETY INTERNATIONAL (HSI), works around the globe to promote the human-animal bond, rescue and protect dogs and cats, improve farm animal welfare, protect wildlife, promote animal-free…

Animals
4
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
5
Blue Horse Sanctuary
Animals
6
Horse Hugs
—
7
Ric OBarrys Dolphin Project

For Education, Safety, Protection, Recovery, and Prevention From Cruelty for All Cetaceans Especially Dolphins

Animals
8
The American Society for the Prevention of Cruelty to Animals

The aspca's mission, as stated by founder henry bergh in 1866, is "to provide effective means for the prevention of cruelty to animals throughout the united states." the aspca was founded on the belief that animals are entitled to kind and…

Animals
9
Animal Wellness Action

To prevent cruelty to animals, we promote enacting and enforcing good public policies. enacting good laws depends upon electing good lawmakers, and we remind voters which candidates care about and support animal issues.

Human Services
10
Martha's Farm Animal Sanctuary
Animals
11
Stormwalker Ranch Equine
Human Services
12
Impact Horse- Connecting Humans and Horses
Animals
How this is measured
The grantee most central to the portfolio’s shape is The Seeing Eye Inc; the most unlike its peers is Aiken Horse Park 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

23 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. 23 of the 43 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)
22/23
Grantees still filing
17/23
Grew since first funded

Where the money sits, by cause and then by grantee

The Carnegie Hall Society Inc: $200,000 · OtherThe Carnegie Hall Society IncAMER COMM FOR WEITZMAN INST OF SCIE: $175,000 · OtherAMER COMM FOR WEITZMAN INST OF SCIEMUSEUM OF NATURAL HISTORY: $70,000 · OtherMUSEUM OF NATURAL HISTORYDANNY AND RON RESCUE: $56,649 · OtherDANNY AND RON RESCUEIndividual grant recipient: $55,000 · OtherIndividual grant recipientMETRO MUSEUM OF ART: $41,500 · OtherMETRO MUSEUM OF ARTAMER MUSEUM OF NAT HISTORY: $34,651 · Other+16 more: $110,000 · Other+16 moreAmerican Museum of Natural History: $360,000 · Arts & CultureAmerican Museum of Natural Histo…THE CARNEGIE HALL CORPORATION: $50,000 · Arts & CultureTHE CARNEGIE HALL CORPORATIONMETROPOLITAN MUSEUM OF ART: $30,000 · Arts & CultureMETROPOLITAN MUSEUM OF ARTDANNY & RONS RESCUE: $80,500 · AnimalsDANNY & RONS …Wildlife Conservation Society: $62,000 · AnimalsWildlife Cons…THE RAPTOR TRUST: $20,000 · AnimalsTHE RAPTOR TR…BEST FRIENDS ANIMAL SOCIETY: $7,000 · Animals+4 more: $15,500 · Animals+4 moreNEW JERSEY CONSERVATION FOUNDATION: $84,200 · Environment+1 more: $2,000 · EnvironmentBUFFALO THERAPEUTIC RIDING CENTER INC: $9,500 · Recreation & SportsWashington International Horse Show: $5,000 · Recreation & SportsFRIENDS OF WHITTEMORE INC: $5,000 · Recreation & SportsUPPERVILLE COLT & HORSE SHOW INC: $5,000 · Recreation & SportsHarleys Dream: $19,500 · EducationGlobal Impact: $11,000 · InternationalTHE SEEING EYE INC: $6,000 · Human Services
Other$742,800Arts & Culture$440,000Animals$185,000Environment$86,200Recreation & Sports$24,500Education$19,500International$11,000Human Services$6,000

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 budgetAmerican Museum of Natural History: $360,000 over 7y, 0.0% of budgetNEW JERSEY CONSERVATION FOUNDATION: $84,200 over 7y, 0.3% of budgetDANNY & RONS RESCUE: $80,500 over 7y, 1.1% of budgetWildlife Conservation Society: $62,000 over 6y, 0.0% of budgetTHE CARNEGIE HALL CORPORATION: $50,000 over 2y, 0.1% of budgetMETROPOLITAN MUSEUM OF ART: $30,000 over 1y, 0.0% of budgetSCARSDALE VOLUNTEER AMBULANCE CORPS INC: $20,000 over 1y, 2.3% of budgetTHE RAPTOR TRUST: $20,000 over 4y, 0.3% of budgetHarleys Dream: $19,500 over 7y, 1.5% of budgetGlobal Impact: $11,000 over 2y, 0.0% of budgetBUFFALO THERAPEUTIC RIDING CENTER INC: $9,500 over 3y, 0.7% of budgetBEST FRIENDS ANIMAL SOCIETY: $7,000 over 5y, 0.0% of budgetTHE SEEING EYE INC: $6,000 over 1y, 0.0% of budgetOMEGA HORSE RESCUE AND REHABILITATION CENTER INC: $6,000 over 2y, 0.6% of budgetWashington International Horse Show: $5,000 over 1y, 0.1% of budgetMYLESTONE EQUINE RESCUE: $2,500 over 2y, 0.4% of budgetNORTH SHORE ANIMAL LEAGUE AMERICA INC: $2,000 over 1y, 0.0% of budgetHACKENSACK RIVERKEEPER INC: $2,000 over 1y, 0.2% of budgetMane Stream Inc: $1,000 over 1y, 0.1% 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 American Museum of Natural History ↗
  • Who funds The Carnegie Hall Society Inc ↗
  • Who funds NEW JERSEY CONSERVATION FOUNDATION ↗
  • Who funds DANNY & RONS RESCUE ↗
  • Who funds Wildlife Conservation Society ↗
  • Who funds THE CARNEGIE HALL CORPORATION ↗
  • Who funds METROPOLITAN MUSEUM OF ART ↗
  • Who funds SCARSDALE VOLUNTEER AMBULANCE CORPS INC ↗
  • Who funds THE RAPTOR TRUST ↗
  • Who funds Harleys Dream ↗
  • Who funds Global Impact ↗
  • Who funds BUFFALO THERAPEUTIC RIDING CENTER INC ↗
  • Who funds BEST FRIENDS ANIMAL SOCIETY ↗
  • Who funds THE SEEING EYE INC ↗
  • Who funds OMEGA HORSE RESCUE AND REHABILITATION CENTER INC ↗
  • Who funds AIKEN HORSE PARK FOUNDATION ↗
  • Who funds Washington International Horse Show ↗
  • Who funds FRIENDS OF WHITTEMORE INC ↗
  • Who funds UPPERVILLE COLT & HORSE SHOW INC ↗
  • Who funds MYLESTONE EQUINE RESCUE ↗
  • Who funds NORTH SHORE ANIMAL LEAGUE AMERICA INC ↗
  • Who funds HACKENSACK RIVERKEEPER 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.

National Philanthropi…Paypal Charitable Giv…The Bank of America C…Vanguard Charitable E…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
National Philanthropic TrustPA10.6× affinity7 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

Open a dossier: National Philanthropic Trust · Paypal Charitable Giving Fund · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 William P & Gertrude Schweitzer funds: left to right is the share of its income from government, bottom to top the share from William P & Gertrude Schweitzer. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 50%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →median 1%
  • Mane Stream Inc: 1% of income from government
  • Hackensack Riverkeeper Inc: 0% of income from government
no gov moneyreceives it· size = income
5get no government money at all
2report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–15%
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 43 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 William P & Gertrude Schweitzer’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