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Pennsylvania · Private foundation

William K Stewart Sr 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.

$29k
Granted FY2025(still arriving)
31
Grants FY2025
32
Organizations funded FY2024
38%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$1,000
Largest grant, FY2025
$3,000
Organizations funded a year
13 to 32
FY2020 to FY2024
States reached, FY2025
6
Total assets, FY2025
$335k
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 38% of the organizations William K Stewart Sr Foundation funded were first-time grantees, receiving 28% of its grant dollars.

New vs renewed · share of each year

In FY2024, 72% of grant dollars renewed an existing relationship; $9k went to new ones.

50%100%’21’22’23’24
RenewedFirst-time

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

’21’22’23’24
Arts & CultureHuman ServicesHealthPhilanthropyEnvironmentCommunity ImprovementOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving30$28k20%
FY202432$31k38%
FY202313$17k0%
FY202221$22k5%
FY202123$25k9%
FY202021$23kn/a
97% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Arts & Culture$35kEducation$30kEnvironment$24kReligion$19kHealth$19kCrime & Legal$7kHuman Services$6kPhilanthropy$5kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

IL
NY
PA
CT
CA
VA
MD
DE
DC
TX

Top grantees

Largest recipients by total granted, FY2020 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Old St Joseph's Church$17,0006n/a
Brandywine Conservancy & Museum of Art$11,90060%
Stroud Water Research Center$10,30060%
Camp Dreamcatcher$9,00061%
Theatre Exile Company$7,00060%
St Josephs Preparatory School$7,0002n/a
Arden Theatre Company$6,00060%
1812 Productions Inc$6,00060%
Natural Lands Trust Inc$6,00050%
Georgetown University$6,00060%
Show all 31 grantees
All grantees of William K Stewart Sr Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Old St Joseph's Church$17,0006n/a
Brandywine Conservancy & Museum of Art$11,90060%
Stroud Water Research Center$10,30060%
Camp Dreamcatcher$9,00061%
Theatre Exile Company$7,00060%
St Josephs Preparatory School$7,0002n/a
Arden Theatre Company$6,00060%
1812 Productions Inc$6,00060%
Natural Lands Trust Inc$6,00050%
Georgetown University$6,00060%
Pennsylvania Prison Society$5,00050%
LCH Health and Community Services$3,80050%
Milagro House Inc$3,10050%
Connecticut College$3,00060%
Fulton Theatre Company$2,50050%
Operation Warm Inc$2,25050%
Sarah's Inn$2,00010%
World Wildlife Fund Inc$2,00040%
Chester County Hospital Foundation$2,00020%
The Land Conservancy for Southern Chester County$1,60020%
Kennett Library$1,20020%
Serviam Girls Academy Inc$1,00020%
Inside-Out Center$1,0001n/a
Whyy Inc$1,00020%
Beyond Hunger$1,00010%
Gary Sinise Foundation$66010%
Wild Earth Allies Inc$50010%
The SMART Foundation$5001n/a
The Children's Hospital of Philadelphia Foundation$50010%
American Friends of the Parents Circle - Families Forum$5001n/a
Why Not Prosper Inc$40010%

What it could do for these grantees

Plus 11 recipients with no EIN on record ($25k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget William K Stewart Sr Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetBrandywine Conservancy & Museum of Art: $11,900 over 6y, 0.0% of budgetStroud Water Research Center: $10,300 over 6y, 0.0% of budgetCamp Dreamcatcher: $9,000 over 6y, 0.5% of budgetTheatre Exile Company: $7,000 over 6y, 0.2% of budgetArden Theatre Company: $6,000 over 6y, 0.0% of budget1812 Productions Inc: $6,000 over 6y, 0.1% of budgetNatural Lands Trust Inc: $6,000 over 5y, 0.0% of budgetGeorgetown University: $6,000 over 6y, 0.0% of budgetPennsylvania Prison Society: $5,000 over 5y, 0.1% of budgetLCH Health and Community Services: $3,800 over 5y, 0.0% of budgetMilagro House Inc: $3,100 over 5y, 0.1% of budgetConnecticut College: $3,000 over 6y, 0.0% of budgetFulton Theatre Company: $2,500 over 5y, 0.0% of budgetOperation Warm Inc: $2,250 over 5y, 0.0% of budgetSarah's Inn: $2,000 over 1y, 0.0% of budgetWorld Wildlife Fund Inc: $2,000 over 4y, 0.0% of budgetChester County Hospital Foundation: $2,000 over 2y, 0.0% of budgetThe Land Conservancy for Southern Chester County: $1,600 over 2y, 0.2% of budgetKennett Library: $1,200 over 2y, 0.0% of budgetServiam Girls Academy Inc: $1,000 over 2y, 0.1% of budgetWhyy Inc: $1,000 over 2y, 0.0% of budgetBeyond Hunger: $1,000 over 1y, 0.0% of budgetGary Sinise Foundation: $660 over 1y, 0.0% of budgetWild Earth Allies Inc: $500 over 1y, 0.0% of budgetThe Children's Hospital of Philadelphia Foundation: $500 over 1y, 0.0% of budgetWhy Not Prosper Inc: $400 over 1y, 0.0% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 26.

Nonprofits that may fit its grantmaking

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 William Penn FoundationPA21.1× affinity8 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The William Penn Foundation · The Philadelphia Foundation · Cabot-Kjellerup Foundation · Independence Foundation · Connelly Foundation · The Dansko Foundation Inc · Chester County Community Foundation · United Way of Greater Philadelphia and Southern New Jersey · Jpmorgan Chase Foundation · Forney Family Foundation Inc · The Oxford Area Foundation · Sharp 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.

Compare William K Stewart Sr Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to William K Stewart Sr Foundation?

Find your warmest path to William K Stewart Sr 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.

About William K Stewart Sr Foundation

How much does William K Stewart Sr Foundation give?
William K Stewart Sr Foundation reported 31 grants totaling $29,000 in its FY2025 IRS filing. It funded between 13 and 32 organizations a year over FY2020 to FY2024.
What does William K Stewart Sr Foundation fund?
By grant dollars over FY2020 to FY2025, its largest causes are Arts & Culture (23%), Education (20%), Environment (16%).
Who are William K Stewart Sr Foundation's largest grantees?
By total granted over FY2020 to FY2025: Old St Joseph's Church ($17k), Brandywine Conservancy & Museum of Art ($12k), Stroud Water Research Center ($10k).
Does William K Stewart Sr Foundation fund new organizations?
In FY2024, 38% of the organizations it funded were first-time grantees.
Does William K Stewart Sr Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as William K Stewart Sr Foundation?
Its strongest co-funders, measured against what their size predicts, include The William Penn Foundation, The Philadelphia Foundation, Cabot-Kjellerup Foundation.
Where is William K Stewart Sr Foundation based?
William K Stewart Sr Foundation is based in PA.

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

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