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Delaware · Private foundation

Posner 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.

$167k
Granted FY2025(still arriving)
15
Grants FY2025
19
Organizations funded FY2024
11%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$10,000
Largest grant, FY2025
$25,000
Organizations funded a year
12 to 19
FY2018 to FY2024
States reached, FY2025
2
Total assets, FY2025
$1.5M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 11% of the organizations Posner Foundation funded were first-time grantees, receiving 3% of its grant dollars.

New vs renewed · share of each year

In FY2024, 97% of grant dollars renewed an existing relationship; $4k went to new ones.

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

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

’19’20’21’22’23’24
Arts & CultureEducationHealthHuman ServicesPhilanthropyOther
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 arriving14$157k0%
FY202419$126k11%
FY202318$153k17%
FY202215$133k20%
FY202114$117k14%
FY202015$120k33%
FY201913$106k31%
FY201812$100kn/a
100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2025.

Arts & Culture$391kEducation$210kYouth Development$197kHealth$104kHuman Services$56kHousing & Shelter$50kPhilanthropy$46kEnvironment$2k

Top grantees

Largest recipients by total granted, FY2018 to FY2025, and the share of each one’s budget the grants supplied at peak.

Show all 30 grantees

What it could do for these grantees

Plus 1 recipient with no EIN on record ($3k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Posner Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThe Desert Biennial Dba Desert X: $94,500 over 8y, 1.8% of budgetSaint Josephs Arts Foundation: $85,000 over 4y, 3.3% of budgetThe Branson School: $72,000 over 4y, 0.1% of budgetChildren's Hospital of Wisconsin Inc: $70,750 over 8y, 0.0% of budgetMuseum Associates: $70,000 over 8y, 0.0% of budgetBoys and Girls Club of Greater Milwaukee Inc: $68,500 over 8y, 0.0% of budgetChildren's Outing Association: $66,400 over 8y, 0.1% of budgetDrew School: $62,500 over 5y, 0.1% of budgetCoalition for Children Youth & Families Inc: $53,000 over 6y, 0.8% of budgetMarin Country Day School: $52,000 over 7y, 0.1% of budgetMilwaukee Art Museum Inc: $51,850 over 6y, 0.1% of budgetUniversity of Wisconsin Foundation: $45,750 over 6y, 0.0% of budgetGet Lit - Words Ignite Inc: $45,000 over 6y, 0.4% of budgetM F Place Inc: $29,500 over 7y, 0.4% of budgetIntersection for the Arts: $28,000 over 2y, 0.2% of budgetMarin Montessori School: $20,500 over 3y, 0.1% of budgetThe Bay School of San Francisco: $15,000 over 3y, 0.0% of budgetConquer Cancer Foundation of the American Society of Clinical Oncology: $13,000 over 3y, 0.0% of budgetUniversity of California San Francisco Foundation: $10,000 over 1y, 0.0% of budgetNavy Seal Foundation Inc: $7,500 over 2y, 0.0% of budgetPlanned Parenthood Los Angeles: $5,500 over 3y, 0.0% of budgetOutfest: $5,000 over 1y, 0.2% of budgetCreative Visions Foundation: $4,500 over 2y, 0.0% of budgetMilwaukee Center for Children and Youth Inc: $3,000 over 1y, 0.6% of budgetMarin Primary & Middle School: $2,500 over 1y, 0.0% of budgetChildren's Cancer Research Fund: $2,500 over 1y, 0.9% of budgetWhite Feather Foundation: $2,000 over 1y, 1.2% of budgetIsrael Cancer Research Fund Inc: $2,000 over 1y, 0.0% of budgetChildren's Enviromental Literacy Fdn: $2,000 over 1y, 0.3% 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 29.

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.

Jewish Community Federation of San Francisco the Peninsula Marin & SonomaCA18.7× affinity7 shared granteesties to 9 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · Marin Community Foundation · Baird Foundation Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · The Chicago Community Trust · The San Francisco Foundation · Youth Foundation Inc · Evan & Marion Helfaer Foundation · United Way of Greater Milwaukee & Waukesha County Inc · Greater Milwaukee Foundation Inc · National Philanthropic Trust · The Bessemer 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.

Compare Posner Foundation with peer funders

About Posner Foundation

How much does Posner Foundation give?
Posner Foundation reported 15 grants totaling $166,800 in its FY2025 IRS filing. It funded between 12 and 19 organizations a year over FY2018 to FY2024.
What does Posner Foundation fund?
By grant dollars over FY2018 to FY2025, its largest causes are Arts & Culture (37%), Education (20%), Youth Development (19%).
Who are Posner Foundation's largest grantees?
By total granted over FY2018 to FY2025: The Desert Biennial Dba Desert X ($95k), Saint Josephs Arts Foundation ($85k), The Branson School ($72k).
Does Posner Foundation fund new organizations?
In FY2024, 11% of the organizations it funded were first-time grantees.
Does Posner 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 Posner Foundation?
Its strongest co-funders, measured against what their size predicts, include Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma, Marin Community Foundation, Baird Foundation Inc.
Where is Posner Foundation based?
Posner Foundation is based in DE.

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 33 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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