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New York · Private foundation

The Duke of Omnium Fund

Its FY2025 filing reports that it accepted unsolicited grant applications.

$205k
Granted FY2025(still arriving)
35
Grants FY2025
28
Organizations funded FY2024
0%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$1,000
Largest grant, FY2025
$54,000
Organizations funded a year
28 to 31
FY2020 to FY2024
States reached, FY2025
6
Total assets, FY2025
$2.7M
Applications
Takes unsolicited applications
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 0% of the organizations The Duke of Omnium Fund funded were first-time grantees, receiving 0% of its grant dollars.

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 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
EducationArts & CultureHealthRecreation & Sports
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 arriving33$150k15%
FY202428$93k0%
FY202331$147k10%
FY202230$259k7%
FY202129$165k0%
FY202029$190kn/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.

Education$683kArts & Culture$416kInternational$176kSocial Science$115kEnvironment$81kScience & Tech$75kAnimals$60kHealth$46kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

NH
IL
NY
MA
CT
CA
VA
TX

Top grantees

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

Show all 31 grantees

What it could do for these grantees

Plus 8 recipients with no EIN on record ($391k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget The Duke of Omnium Fund supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThomas Jefferson Foundation Inc: $207,500 over 6y, 0.1% of budgetRising Phoenix Conservation Inc: $60,000 over 6y, 6.4% of budgetSquam Lakes Conservation Society: $56,000 over 6y, 1.5% of budgetHenry L Ferguson Museum: $45,000 over 6y, 1.0% of budgetMetropolitan Museum of Art: $34,000 over 3y, 0.0% of budgetAmerican Friends of Versailles: $29,500 over 6y, 5.7% of budgetSquam Lakes Association: $16,000 over 6y, 0.4% of budgetIsland Health Project Inc: $16,000 over 6y, 0.4% of budgetSpeare Memorial Hospital: $15,000 over 6y, 0.0% of budgetUbuntu Pathways Inc: $15,000 over 6y, 0.2% of budgetThe American University of Rome: $14,500 over 4y, 0.1% of budgetSt Bernard's School Inc: $12,000 over 6y, 0.0% of budgetLawrence Memorial Hospital Inc: $10,000 over 1y, 0.0% of budgetAmerican Friends of the Musee Dorsay: $10,000 over 1y, 0.5% of budgetMillbrook School: $10,000 over 1y, 0.0% of budgetThe Lighthouse Works Inc: $9,500 over 6y, 0.4% of budgetHolderness School: $7,500 over 6y, 0.0% of budgetThe Chapin School Ltd: $6,000 over 6y, 0.0% of budgetSquam Lakes Natural Science Center: $6,000 over 6y, 0.0% of budgetWheaton College: $6,000 over 6y, 0.0% of budgetNextgen Face Inc: $5,000 over 1y, 1.1% of budgetPark Children's Day School: $5,000 over 1y, 0.1% of budgetFishers Island Conservancy Inc: $3,000 over 6y, 0.3% of budgetCentral Park Track Club Corporation: $2,500 over 1y, 0.5% of budgetNational Education Opportunity Network Inc: $2,500 over 1y, 0.0% of budgetFishers Island Library Association: $1,500 over 6y, 0.1% of budgetIsland Peoples Project: $1,500 over 6y, 0.4% of budgetFishers Island Fire Department: $1,500 over 6y, 0.1% of budgetThe Brearley School: $1,500 over 6y, 0.0% of budgetTuxedo Park School: $1,000 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 30.

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 Frederic C Hamilton Family FoundationCO22.1× affinity8 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Frederic C Hamilton Family Foundation · The Willinphila Foundation · The McCance Foundation · The Long Stems Foundation Inc · The Fairfield Foundation · The Sooner Foundation · The William C and Cindy L Scott Foundation · Trippe Fund Inc · Ederic Foundation Inc · Fleetwood Foundation · W L Lyons Brown Jr Charitable Foundation · The Emily Hall Tremaine 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.

Compare The Duke of Omnium Fund with peer funders

About The Duke of Omnium Fund

How much does The Duke of Omnium Fund give?
The Duke of Omnium Fund reported 35 grants totaling $204,750 in its FY2025 IRS filing. It funded between 28 and 31 organizations a year over FY2020 to FY2024.
What does The Duke of Omnium Fund fund?
By grant dollars over FY2020 to FY2025, its largest causes are Education (41%), Arts & Culture (25%), International (10%).
Who are The Duke of Omnium Fund's largest grantees?
By total granted over FY2020 to FY2025: Thomas Jefferson Foundation Inc ($208k), Rising Phoenix Conservation Inc ($60k), Squam Lakes Conservation Society ($56k).
Does The Duke of Omnium Fund fund new organizations?
In FY2024, 0% of the organizations it funded were first-time grantees.
Does The Duke of Omnium Fund accept unsolicited applications?
Its most recent filing reports that it accepts unsolicited grant applications.
Which funders back the same organizations as The Duke of Omnium Fund?
Its strongest co-funders, measured against what their size predicts, include The Frederic C Hamilton Family Foundation, The Willinphila Foundation, The McCance Foundation.
Where is The Duke of Omnium Fund based?
The Duke of Omnium Fund is based in NY.

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 44 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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