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Janet Prindle Seidler Foundation Dated at a glance

· Private foundation

Janet Prindle Seidler Foundation Dated

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.

$361k
Granted FY2025still arriving
14
Grants FY2025still arriving
6
States reached
$60k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2022 to 2025.

Philanthropy$826kHealth$310kArts & Culture$225kHuman Services$115kReligion$50kEducation$14kYouth Development$1k
02FY2025 · 14 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k4 grants · $16k
  • $10k–50k9 grants · $285k
  • $50k–250k1 grant · $60k
$30,000
Median grant
6
States reached
$15M
Total assets
Largest grants
RecipientAmount
ST LUKES CHAMBER ENSEMBLE INC$60,000
ALZHEIMERS DISEASE RESEARCH FOUNDATION$40,000
NEW YORK WOMENS FOUNDATION$40,000
MS FOUNDATION$40,000
STAMFORD HOSPITAL$40,000
ALZHEIMERS DRUG DISCOVERY FOUNDATION$40,000
CARNEGIE HALL SOCIETY INC$30,000
ST MARYS EPISCOPAL CHURCH$25,000
MOUNT SINAI PARENTING CENTER$20,000
ATLANTIC CLASSICAL ORCHESTRA FUND$10,000
MONTANA DE LUZ$5,000
DARIEN YMCA$5,000
ST JUDE CHILDRENS RESEARCH HOSPITAL$5,000
DARIEN LIBRARY$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:

Its human-services grants (FY24–25, $90k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 89% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%DARIEN YMCA: $5k → 9%DARIEN YMCA: $5k → 9%NEW YORK WOMENS FOUNDATION: $40k → 17%NEW YORK WOMENS FOUNDATION: $40k → 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.
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.

92%of every dollar goes to organizations it has funded before.
$1.4M · 13 repeat orgs$123k to everyone else

13 repeat relationships: 12 still active in FY2025, 1 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

13
6

Total granted

$1.4M
$63k

Median revenue growth · since first grant

+7%
+30%

Still filing today

69%
83%

New vs renewed · share of each year

In FY2025, 83% of grant dollars renewed an existing relationship; $60k went to new ones.

50%100%’22’23’24’25
RenewedFirst-time

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

’22’23’24’25
EducationArts & CultureHealthHuman ServicesSocial SciencePhilanthropyOther
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

  • SL
    ST LUKES CHAMBER ENSEMBLE INC
    2× · 2024–2025 · $120k · revenue +45%
  • AD
    ALZHEIMER'S DISEASE RESEARCH FOUNDATION
    2× · 2024–2025 · $80k · revenue +78%
  • ST JUDE CHILDREN'S RESEARCH HOSPITAL INC
    2× · 2024–2025 · $10k · revenue +10%

Funded once

  • MM
    METROPOLITAN MUSEUM OF ARTgraduated
    one grant, 2024 · $25k · revenue +30%
  • MS
    MOUNT SINAI PARENT CENTER
    one grant, 2024 · $20k
  • TR
    THE ROCKEFELLER UNIVERSITY
    one grant, 2024 · $10k · revenue -8%
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
New York University

Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes. nyu's primary missions are education, research and scholarship, and patient care.

Education
2
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
3
New York Genome Center Inc

Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.

Health
4
The Lieber Institute Inc

The mission of the institute is to translate basic genetic and molecular mechanisms of schizophrenia and related developmental brain disorders into clinical advances that change the lives of affected individuals. it is catalyzing a new…

Health
5
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
6
The Pierpont Morgan Library

The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.

Education
7
The New York Public Library Astor Lenox and Tilden Foundations

The mission of the new york public library is to inspire lifelong learning, advance knowledge, and strengthen our communities.

Education
8
Trustees of Dartmouth College

Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.

Education
9
Dana-Farber Cancer Institute Inc

The mission of dfci is to provide expert, compassionate, and equitable care to children, adults, and their families, while advancing the understanding, diagnosis, treatment, cure, and prevention of cancer and related diseases. we train new…

Health
10
Lowell Observatory

The mission of lowell observatory is to pursue the study of astronomy, especially the study of our solar system and its evolution; to conduct pure research in astronomical phenomena; and to maintain quality public education and outreach…

Science & Tech
11
Manhattanville University

To educate students to be ethical and socially responsible leaders in a global community.

Education
12
Neurology Associates of Stony Brook University Faculty Practice Corp

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
How this is measured
The grantee most central to the portfolio’s shape is St Jude Children's Research Hospital Inc; the most unlike its peers is Metropolitan Museum of Art. 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

16 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. 16 of the 21 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)
15/16
Grantees still filing
9/16
Grew since first funded

Where the money sits, by cause and then by grantee

VARIOUS CHARITIES: $817,799 · OtherVARIOUS CHARITIESMS FOUNDATION: $80,000 · OtherMS FOUNDATIONThe Carnegie Hall Society Inc: $60,000 · OtherThe Carnegie Hall Society IncST MARYS EPISCOPAL CHURCH: $50,000 · Other+2 more: $40,000 · OtherST LUKES CHAMBER ENSEMBLE INC: $120,000 · Arts & CultureST LUKES CHA…METROPOLITAN MUSEUM OF ART: $25,000 · Arts & CultureMETROPOLITAN…ATLANTIC CLASSICAL ORCHESTRA INC: $20,000 · Arts & CultureATLANTIC CLA…ALZHEIMER'S DISEASE RESEARCH FOUNDATION: $80,000 · HealthALZHEIMER…The Stamford Hospital: $40,000 · HealthThe Stamf…ST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $10,000 · HealthST JUDE C…NEW YORK WOMEN'S FOUNDATION INC: $80,000 · Human ServicesDARIEN COMMUNITY YOUNG MEN'S CHRISTIAN ASSOCIATION INC: $10,000 · Human ServicesALZHEIMER'S DRUG DISCOVERY FOUNDATION: $80,000 · Social ScienceTHE ROCKEFELLER UNIVERSITY: $10,000 · EducationSAILFISH POINT FOUNDATION INC: $5,000 · EducationDARIEN LIBRARY INC: $2,000 · EducationLibrary Foundation of Martin County: $2,000 · EducationMONTANA DE LUZ: $8,000 · PhilanthropyBOYS & GIRLS CLUB OF MARTIN COUNTY: $1,000 · Youth Development
Other$1,047,799Arts & Culture$165,000Health$130,000Human Services$90,000Social Science$80,000Education$19,000Philanthropy$8,000Youth Development$1,000

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 budgetST LUKES CHAMBER ENSEMBLE INC: $120,000 over 2y, 0.7% of budgetALZHEIMER'S DRUG DISCOVERY FOUNDATION: $80,000 over 2y, 0.1% of budgetNEW YORK WOMEN'S FOUNDATION INC: $80,000 over 2y, 0.4% of budgetALZHEIMER'S DISEASE RESEARCH FOUNDATION: $80,000 over 2y, 0.1% of budgetThe Stamford Hospital: $40,000 over 1y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $25,000 over 1y, 0.0% of budgetATLANTIC CLASSICAL ORCHESTRA INC: $20,000 over 2y, 0.8% of budgetTHE ROCKEFELLER UNIVERSITY: $10,000 over 1y, 0.0% of budgetST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $10,000 over 2y, 0.0% of budgetDARIEN COMMUNITY YOUNG MEN'S CHRISTIAN ASSOCIATION INC: $10,000 over 2y, 0.0% of budgetMONTANA DE LUZ: $8,000 over 2y, 0.6% of budgetSAILFISH POINT FOUNDATION INC: $5,000 over 1y, 0.7% of budgetDARIEN LIBRARY INC: $2,000 over 2y, 0.0% of budgetLibrary Foundation of Martin County: $2,000 over 1y, 0.3% of budgetBOYS & GIRLS CLUB OF MARTIN COUNTY: $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.

National Philanthropi…Vanguard Charitable E…Fidelity Investments …Donor Advised Charita…Amazonsmile Foundation
National Philanthropic TrustPA9.2× affinity4 shared granteesties to 4 of 4Hover any node to trace its alignments.Compare side by side →

Open a dossier: National Philanthropic Trust · Vanguard Charitable Endowment Program · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc · 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 Janet Prindle Seidler Foundation Dated funds: left to right is the share of its income from government, bottom to top the share from Janet Prindle Seidler Foundation Dated. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 30%0%1%3%5%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →median 2%
  • Boys & Girls Club of Martin County: 2% of income from government
  • The Stamford Hospital: 0% of income from government
no gov moneyreceives it· size = income
3get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–20%
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 21 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 Janet Prindle Seidler Foundation Dated’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