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O'Donnell Iselin Foundation Inc at a glance

· Private foundation

O'Donnell Iselin Foundation Inc

Its FY2025 filing reports that it accepted unsolicited grant applications.

$197k
Granted FY2025still arriving
33
Grants FY2025still arriving
6
States reached
$25k
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, FY2017 to 2025.

Education$537kEnvironment$364kHealth$277kScience & Tech$183kHuman Services$114kAnimals$81kReligion$67kArts & Culture$66kOther$0
02FY2025 · 33 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k23 grants · $62k
  • $10k–50k10 grants · $135k
$2,500
Median grant
6
States reached
$935k
Total assets
Largest grants
RecipientAmount
NEW YORK BOTANICAL GARDEN$25,000
ST TIMOTHY'S SCHOOL$25,000
WOODS HOLE OCEANOGRAPHIC INSTITUTE$15,000
ST HILDA'S & ST HUGH'S SCHOOL$10,000
SPENCE CHAPIN$10,000
PLANNED PARENTHOOD OF SOUTHERN NEW ENGLAND$10,000
THE MONTESSORI SCHOOL$10,000
PLANNED PARENTHOOD OF GREATER NEW YORK$10,000
GREENWICH LAND TRUST INC$10,000
THE MONTESSORI SCHOOL ENDOWMENT FUND$10,000
CONNECTICUT FOOD BANK$5,000
UNITED CHURCH OF ROWAYTON$5,000
NORTH COUNTRY SCHOOL SCHOLARSHIP$5,000
REDDING LAND TRUST$5,000
ASPCA$5,000
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 (FY17–25, $103k) land where the poverty rate runs at 15%, against an area that typically sits at 12%. 78% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 12%KIEVE-WAVUS EDUCATION INC: $5k → 9%KIEVE-WAVUS EDUCATION INC: $2k → 9%KIEVE-WAVUS EDUCATION INC: $2k → 9%KIEVE-WAVUS EDUCATION INC: $2k → 9%KIEVE-WAVUS EDUCATION INC: $2k → 9%KIEVE-WAVUS EDUCATION INC: $2k → 9%KIEVE-WAVUS EDUCATION INC: $2k → 9%KIEVE-WAVUS EDUCATION INC: $1k → 9%KIEVE-WAVUS EDUCATION INC: $1k → 9%COMMONWEAL: $1k → 8%COMMONWEAL: $1k → 8%COMMONWEAL: $1k → 8%COMMONWEAL: $700 → 8%SPENCE CHAPIN: $10k → 17%SPENCE CHAPIN: $10k → 17%SPENCE CHAPIN: $15k → 17%SPENCE CHAPIN: $10k → 17%SPENCE CHAPIN: $10k → 17%SPENCE CHAPIN: $10k → 17%SPENCE CHAPIN: $10k → 17%SPENCE CHAPIN: $6k → 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

ME
VT
NY
MA
CT
CA
MD
TN
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.

99%of every dollar goes to organizations it has funded before.
$1.8M · 43 repeat orgs$18k to everyone else

43 repeat relationships: 33 still active in FY2025, 10 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

43
8

Total granted

$1.8M
$18k

Median revenue growth · since first grant

+52%
+167%

Still filing today

65%
88%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 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
EnvironmentArts & CultureEducationAnimalsHuman ServicesHealthOther
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

  • NY
    NEW YORK BOTANICAL GARDEN
    9× · 2017–2025 · $220k · revenue +40%
  • WH
    WOODS HOLE OCEANOGRAPHIC INSTITUTION
    9× · 2017–2025 · $175k · revenue +68%
  • PP
    PLANNED PARENTHOOD OF GREATER NEW YORK INC
    9× · 2017–2025 · $130k · revenue +74%

Funded once

  • WW
    Wings World Quest Incgraduated
    one grant, 2017 · $8k · revenue +313%
  • FC
    FRIENDS COMMITTEE ON NATIONAL LEGISLATIONgraduated
    one grant, 2017 · $2k · revenue +67%
  • ENVIRONMENTAL DEFENSE FUND INCORPORATEDgraduated
    one grant, 2017 · $2k · revenue +202%
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
Native Plant Trust Inc

The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.

Environment
2
Dutchess Land Conservancy Inc

Dutchess land conservancy (dlc) is dedicated to preserving the scenic, agricultural and environmental resources of dutchess county, new york, and the surrounding area. dlc, as a private non-profit land conservation organization, carries…

Environment
3
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
4
Rainforest Trust

Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.

International
5
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
6
Harvard Conservation Trust

To preserve the unique character and natural resources of harvard.

Environment
7
The Adirondack Council Inc

The adirondack council ensures the ecological integrity (clean water and air, wildlife habitat, etc.), wild character (solitude, scenic beauty, etc.), and vibrant communities of new york's six-million-acre adirondack park. the adirondack…

Environment
8
New York League of Conservation Voters

See schedule onylcv is a non-partisan policy making and political action organization that works to make environmental protection a top priority with elected officials, decision-makers and the voters by evaluating incumbent performance and…

—
9
President and Trustees of Bates College

Bates is a college of the liberal arts and sciences, and is a coeducational, nonsectarian, residential college with special commitments to academic rigor, and to assuring in all of its efforts the dignity of each individual, and access to…

Education
10
Bartlett Arboretum Association Inc

To cultivate and develop an expansive collection of trees, gardens, and plants for all to explore, enjoy and study; and to provide through education and stewardship, a greener, healthier, more beautiful environment.

Environment
11
Wildlands Trust Inc

The wildlands trust works throughout southeastern massachusetts to conserve and permanently protect native habitats, farmland, and lands of high ecologic and scenic value that serve to keep our communities healthy and our residents…

Environment
12
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

—
How this is measured
The grantee most central to the portfolio’s shape is The Elephant Sanctuary in Tennessee; the most unlike its peers is Museum of the City of New York. 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

36 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. 36 of the 52 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)
9
Early backer (in before they grew)
36/36
Grantees still filing
29/36
Grew since first funded

Where the money sits, by cause and then by grantee

PLANNED PARENTHOOD OF CONNECTICUT: $85,000 · OtherPLANNED PARENTHOOD OF CONNECTICUTST HILDAS AND ST HUGHS SCHOOL: $85,000 · OtherST HILDAS AND ST HUGHS SCHOOLTHE MONTESSORI SCHOOL: $72,000 · OtherTHE MONTESSORI SCHOOLTHE MONTESSORI SCHOOL ENDOWMENT FUND: $70,000 · OtherTHE MONTESSORI SCHOOL ENDOWMENT FUNDNORTH COUNTRY SCHOOL SCHOLARSHIP: $45,000 · OtherNORTH COUNTRY SCHOOL SCHOLARSHIPUNITED CHURCH OF ROWAYTON INC: $45,000 · OtherUNITED CHURCH OF ROWAYTON INCCONNECTICUT FOODSHARE INC: $34,500 · OtherMEDECINS SANS FRONTIERES USA INC: $23,500 · OtherPERSON TO PERSON INC: $28,000 · Other+24 more: $215,800 · Other+24 moreNEW YORK BOTANICAL GARDEN: $220,000 · EnvironmentNEW YORK BOTANICAL GAR…THE GREENWICH LAND TRUST INC: $85,000 · EnvironmentTHE GREENWICH LAND TRU…Redding Land Trust Inc: $37,500 · EnvironmentRedding Land Trust Inc+3 more: $21,000 · Environment+3 moreCORPORATION OF ST TIMOTHY'S SCHOOL: $227,500 · EducationCORPORATION OF…Haystack Mountain School of Crafts: $10,500 · Education+2 more: $3,000 · EducationWOODS HOLE OCEANOGRAPHIC INSTITUTION: $175,000 · Science & TechWOODS HOLE…PLANNED PARENTHOOD OF GREATER NEW YORK INC: $130,000 · HealthPLANNED PA…PLANNED PARENTHOOD OF SOUTHERN NEW ENGLAND INC: $45,000 · HealthPLANNED PA…SPENCE-CHAPIN SERVICES TO FAMILIES AND CHILDREN: $81,000 · Human ServicesKieve Wavus Education Inc: $18,500 · Human ServicesCOMMONWEAL: $3,700 · Human ServicesTHE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $37,500 · AnimalsTHE ELEPHANT SANCTUARY IN TENNESSEE: $22,500 · AnimalsKISMA PRESERVE: $21,000 · Animals
Other$703,800Environment$363,500Education$241,000Science & Tech$175,000Health$175,000Human Services$103,200Animals$81,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetCORPORATION OF ST TIMOTHY'S SCHOOL: $227,500 over 9y, 0.2% of budgetNEW YORK BOTANICAL GARDEN: $220,000 over 9y, 0.0% of budgetWOODS HOLE OCEANOGRAPHIC INSTITUTION: $175,000 over 9y, 0.0% of budgetPLANNED PARENTHOOD OF GREATER NEW YORK INC: $130,000 over 9y, 0.0% of budgetTHE GREENWICH LAND TRUST INC: $85,000 over 8y, 1.0% of budgetSPENCE-CHAPIN SERVICES TO FAMILIES AND CHILDREN: $81,000 over 8y, 0.2% of budgetPLANNED PARENTHOOD OF SOUTHERN NEW ENGLAND INC: $45,000 over 4y, 0.0% of budgetRedding Land Trust Inc: $37,500 over 9y, 5.3% of budgetTHE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $37,500 over 9y, 0.0% of budgetCONNECTICUT FOODSHARE INC: $34,500 over 8y, 0.0% of budgetPERSON TO PERSON INC: $28,000 over 8y, 0.0% of budgetMEDECINS SANS FRONTIERES USA INC: $23,500 over 9y, 0.0% of budgetTHE ELEPHANT SANCTUARY IN TENNESSEE: $22,500 over 9y, 0.1% of budgetAMERICARES FOUNDATION INC: $22,500 over 9y, 0.0% of budgetALL HANDS AND HEARTS SMART RESPONSE INC: $22,000 over 8y, 0.0% of budgetKISMA PRESERVE: $21,000 over 9y, 1.7% of budgetDOROTHY DAY HOSPITALITY HOUSE INC: $19,500 over 8y, 1.9% of budgetKieve Wavus Education Inc: $18,500 over 9y, 0.1% of budgetMUSEUM OF THE CITY OF NEW YORK: $15,500 over 8y, 0.0% of budgetSAVE THE SOUND: $11,000 over 6y, 0.0% of budgetHaystack Mountain School of Crafts: $10,500 over 9y, 0.1% of budgetAUDUBON CANYON RANCH INC: $8,000 over 6y, 0.0% of budgetROWAYTON ARTS CENTER: $7,000 over 7y, 0.3% of budgetWOODLAWN CONSERVANCY INC: $6,500 over 6y, 0.2% of budgetFRIENDS OF BOLINAS STINSON BEACH LIBRARIES: $3,800 over 4y, 3.1% of budgetCOMMONWEAL: $3,700 over 4y, 0.0% of budgetBOLINAS MUSEUM: $3,000 over 3y, 0.2% of budgetLOCKWOOD-MATHEWS MANSION MUSEUM OF NORWALK INC: $3,000 over 3y, 0.2% of budgetFRIENDS COMMITTEE ON NATIONAL LEGISLATION: $2,000 over 1y, 0.1% of budgetENVIRONMENTAL DEFENSE FUND INCORPORATED: $2,000 over 1y, 0.0% of budgetTHE GRAMMAR SCHOOL INC: $2,000 over 1y, 0.1% of budgetBOLINAS COMMUNITY LAND TRUST: $2,000 over 1y, 0.5% of budgetPUTNEY SCHOOL INC: $1,000 over 1y, 0.0% of budgetTrustees of Hamilton College: $1,000 over 1y, 0.0% of budgetPUBLIC CITIZEN INC: $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.

  • Who funds CORPORATION OF ST TIMOTHY'S SCHOOL ↗
  • Who funds NEW YORK BOTANICAL GARDEN ↗
  • Who funds WOODS HOLE OCEANOGRAPHIC INSTITUTION ↗
  • Who funds PLANNED PARENTHOOD OF GREATER NEW YORK INC ↗
  • Who funds THE GREENWICH LAND TRUST INC ↗
  • Who funds SPENCE-CHAPIN SERVICES TO FAMILIES AND CHILDREN ↗
  • Who funds PLANNED PARENTHOOD OF SOUTHERN NEW ENGLAND INC ↗
  • Who funds Redding Land Trust Inc ↗
  • Who funds THE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS ↗
  • Who funds CONNECTICUT FOODSHARE INC ↗
  • Who funds PERSON TO PERSON INC ↗
  • Who funds MEDECINS SANS FRONTIERES USA INC ↗
  • Who funds THE ELEPHANT SANCTUARY IN TENNESSEE ↗
  • Who funds AMERICARES FOUNDATION INC ↗
  • Who funds ALL HANDS AND HEARTS SMART RESPONSE INC ↗
  • Who funds KISMA PRESERVE ↗
  • Who funds DOROTHY DAY HOSPITALITY HOUSE INC ↗
  • Who funds Kieve Wavus Education Inc ↗
  • Who funds MUSEUM OF THE CITY OF NEW YORK ↗
  • Who funds SAVE THE SOUND ↗
  • Who funds Haystack Mountain School of Crafts ↗
  • Who funds AUDUBON CANYON RANCH INC ↗
  • Who funds Wings World Quest Inc ↗
  • Who funds ROWAYTON ARTS CENTER ↗
  • Who funds WOODLAWN CONSERVANCY INC ↗
  • Who funds FRIENDS OF BOLINAS STINSON BEACH LIBRARIES ↗
  • Who funds COMMONWEAL ↗

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.

Cleveland H Dodge Fou…Maine Community Found…Marin Community Found…National Philanthropi…The Goldman Sachs Cha…Gs Donor Advised Phil…Morgan Stanley Global…American Endowment Fo…Vanguard Charitable E…Jpmorgan Chase Founda…The Bank of America C…Fidelity Investments …
Cleveland H Dodge Foundation IncNY13.5× affinity4 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Cleveland H Dodge Foundation Inc · Maine Community Foundation Inc · Marin Community Foundation · National Philanthropic Trust · The Goldman Sachs Charitable Gift Fund · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Morgan Stanley Global Impact Funding Trust Inc · American Endowment Foundation · Vanguard Charitable Endowment Program · Jpmorgan Chase Foundation · The Bank of America Charitable Foundation Inc · Fidelity Investments Charitable Gift 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.

How much its grantees rely on government

Each dot is one organization O'Donnell Iselin Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from O'Donnell Iselin Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 60%1%3%6%10%funder's share of their income ↑0%19%38%56%75%share of the org’s income from government →median 5%
  • Woods Hole Oceanographic Institution: 63% of income from government
  • Lockwood-Mathews Mansion Museum of Norwalk Inc: 43% of income from government
  • Save the Sound: 37% of income from government
  • Planned Parenthood of Southern New England Inc: 10% of income from government
  • Connecticut Foodshare Inc: 5% of income from government
  • Person to Person Inc: 5% of income from government
  • The Grammar School Inc: 4% of income from government
  • Americares Foundation Inc: 0% of income from government
  • Rowayton Arts Center: 0% of income from government
no gov moneyreceives it· size = income
6get no government money at all
5report government grants on their 990 we could not trace to a source (not plotted)
1rely on government for over half their income
⤢ axis zoomed · 0–75%
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 52 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 O'Donnell Iselin’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