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Otter Island Foundation at a glance

· Private foundation

Otter Island 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.

$191k
Granted FY2025still arriving
86
Grants FY2025still arriving
21
States reached
$27k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Arts & Culture$457kEducation$374kHealth$141kEnvironment$130kReligion$59kPhilanthropy$58kHuman Services$44kCivil Rights$39kOther$0
02FY2025 · 86 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k81 grants · $118k
  • $10k–50k5 grants · $74k
$1,000
Median grant
21
States reached
$2.9M
Total assets
Largest grants
RecipientAmount
CONNECTICUT COLLEGE$27,000
ISLAND INSTITUTE$13,500
STRAND THEATER$12,000
GIRLS FOUNDATION OF TANZANIA$11,000
FARNSWORTH ART MUSEUM$10,000
HERMANN PARK CONSERVANCY$5,500
PENOBSCOT BAY YMCA$5,000
SAN FRANCISCO DAY SCHOOL$5,000
FIRST CONGREGATIONAL SOCIETY OF GILMANTON$5,000
POE ELEMENTARY SCHOOL PTO$5,000
DUKE UNIVERSITY$4,500
CHILDREN'S MUSEUM OF HOUSTON$4,000
NORTH BRIDGE ACADEMY$4,000
ANNUNCIATION ORTHODOX SCHOOL$3,500
UNITED MIDCOAST CHARITIES$3,000
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, $51k) land where the poverty rate runs at 13%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%EPISOCPAL COMMUNITY SERVICES: $100 → 11%PAJAMA PROGRAM INC: $500 → 17%BOULDER JEWISH COMMUNITY CENTER: $2k → 12%PAJAMA PROGRAM INC: $500 → 17%BOULDER JEWISH COMMUNITY CENTER: $2k → 12%PAJAMA PROGRAM INC: $500 → 17%BOULDER JEWISH COMMUNITY CENTER: $2k → 12%BOULDER JEWISH COMMUNITY CENTER: $500 → 12%BOULDER JEWISH COMMUNITY CENTER: $500 → 12%BOULDER JEWISH COMMUNITY CENTER: $500 → 12%TANZANIAN CHILDREN'S FUND: $500 → 16%TANZANIAN CHILDREN'S FUND: $500 → 16%AMERICAN RED CROSS: $1k → 14%TANZANIAN CHILDREN'S FUND: $500 → 16%TANZANIAN CHILDREN'S FUND: $500 → 16%TANZANIAN CHILDREN'S FUND: $500 → 16%TANZANIAN CHILDREN'S FUND: $500 → 16%AMERICAN RED CROSS: $500 → 14%TANZANIAN CHILDREN'S FUND: $500 → 16%TANZANIAN CHILDREN'S FUND: $300 → 16%NEHEMIAH CENTER INC: $250 → 16%NEHEMIAH CENTER INC: $250 → 16%HOUSTON'S AMAZING PLACE: $750 → 16%EMERGENCY FAMILY ASSISTANCE ASSOCIATION: $298 → 12%THERE WITH CARE: $750 → 12%THERE WITH CARE: $500 → 12%PENOBSCOT BAY YMCA: $6k → 11%THERE WITH CARE: $500 → 12%PENOBSCOT BAY YMCA: $6k → 11%THERE WITH CARE: $500 → 12%PENOBSCOT BAY YMCA: $5k → 11%PENOBSCOT BAY YMCA: $2k → 11%THERE WITH CARE: $500 → 12%PENOBSCOT BAY YMCA: $1k → 11%PENOBSCOT BAY YMCA: $1k → 11%PENOBSCOT BAY YMCA: $300 → 11%PENOBSCOT BAY YMCA: $300 → 11%PENOBSCOT BAY YMCA: $300 → 11%DEPELCHIN CHILDREN'S CENTER: $5k → 16%KIDS MEALS INC: $3k → 16%KIDS MEAL INC: $1k → 16%KNOX COUNTY HOMELESS COALITION: $500 → 11%KNOX COUNTY HOMELESS COALITION: $500 → 11%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
NH
IL
NY
MA
OR
IA
IN
OH
CT
RI
CA
UT
CO
VA
AZ
TN
NC
DC
LA
AL
GA
TX
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.

95%of every dollar goes to organizations it has funded before.
$1.6M · 153 repeat orgs$86k to everyone else

Grantees it renews have grown median revenue +38% since the first grant, against 0% for those funded once.

153 repeat relationships: 74 still active in FY2025, 79 since wound down; 10 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

153
50

Total granted

$1.6M
$62k

Median revenue growth · since first grant

+38%
0%

Still filing today

75%
56%

New vs renewed · share of each year

In FY2025, 87% of grant dollars renewed an existing relationship; $24k 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
Arts & CultureEducationHealthHuman ServicesEnvironmentCivil RightsOther
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

  • TW
    THE WILLIAM A FARNSWORTH LIBRARY AND ART MUSEUM INC
    8× · 2017–2025 · $139k · revenue +240%
  • CC
    CONNECTICUT COLLEGE
    9× · 2017–2025 · $74k · revenue +23%
  • CM
    CHILDREN'S MUSEUM INC
    9× · 2017–2025 · $70k · revenue +89%

Funded once

  • DM
    DEYOUNGLEGION MUSEUM
    one grant, 2018 · $6k
  • FA
    FINE ARTS MUSEUM OF SAN FRANCISCO
    one grant, 2018 · $5k
  • DC
    DEPELCHIN CHILDREN'S CENTERgraduated
    one grant, 2017 · $5k · revenue +30%
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
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
2
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
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
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.

—
5
Houston Botanic Garden

To enrich life through discovery, education, and the conservation of plants and the natural environment.

Environment
6
Museum of Modern Art

The Museum of Modern Art is a private, non-profit institution chartered by the State of New York Department of Education in 1929 to foster public awareness of modern and contemporary art. (Continued in Schedule O)

Arts & Culture
7
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
8
President and Fellows of Harvard College

Undergraduate, graduate, and professional education and research across a broad array of academic domains.

Education
9
Houston Museum of Natural Science

The mission of the Houston Museum of Natural Science shall be to preserve and advance the general knowledge of natural science; to enhance in individuals the knowledge of and delight in natural science and related subjects; and to maintain…

Arts & Culture
10
Rhode Island School of Design

The mission of rhode island school of design, through its college and museum,is to educate its students and the public in the creation and (see schedule o)appreciation of works of art and design, to discover and transmit knowledge and to…

Education
11
The Trustees of Princeton University

Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…

Education
12
New Hampshire Historical Society

To educate a diverse public about the significance of New Hampshire's past and its relationship to our lives today. To this end, the Society collects, preserves, and interprets material pertaining to New Hampshire history.

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is Colorado Gives Foundation; the most unlike its peers is The National World War Ii Museum Inc. 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

155 grantees tracked through their own filings, 2017–2026.

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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 155 of the 219 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)
31
Early backer (in before they grew)
152/155
Grantees still filing
110/155
Grew since first funded

Where the money sits, by cause and then by grantee

Poe Elementary School PTO: $32,500 · OtherPoe Elementary School PTOANNUNCIATION ORTHODOX SCHOOL: $30,000 · OtherANNUNCIATION ORTHODOX SCHOOLCAMDEN PUBLIC LIBRARY: $27,200 · OtherCOFAM: $27,170 · OtherROCKPORT PUBLIC LIBRARY: $24,000 · OtherMD ANDERSON CANCER CENTER: $23,012 · OtherFIRST CONGREGATIONAL SOCIETY OF GILMANTON: $22,461 · OtherHermann Park Conservancy: $20,940 · OtherEVERYTOWN FOR GUN SAFETY SUPPORT FUND INC: $21,000 · Other+93 more: $330,890 · Other+93 moreTHE WILLIAM A FARNSWORTH LIBRARY AND ART MUSEUM INC: $138,761 · Arts & CultureTHE WILLIAM A FARNSWORTH LIBR…CHILDREN'S MUSEUM INC: $70,424 · Arts & CultureCHILDREN'S MUSEUM INCNATIONAL TRUST FOR HISTORIC PRESERVATION IN THE UNITED STATES: $55,000 · Arts & CultureNATIONAL TRUST FOR HISTORIC P…FRIENDS OF THE STRAND THEATRE INC: $45,066 · Arts & CultureFRIENDS OF THE STRAND THEATRE…ALLEY THEATRE: $21,500 · Arts & Culture+24 more: $99,571 · Arts & Culture+24 moreIsland Institute: $107,111 · EducationIsland InstituteCONNECTICUT COLLEGE: $74,000 · EducationCONNECTICUT COLLEGESAN FRANCISCO DAY SCHOOL: $35,500 · EducationSAN FRANCISCO DAY SCHOOLROCKPORT LIBRARY FOUNDATION: $30,947 · EducationROCKPORT LIBRARY FOUNDATIONDUKE UNIVERSITY: $23,500 · EducationDUKE UNIVERSITYGROTON SCHOOL: $20,000 · Education+21 more: $106,005 · Education+21 morePLANNED PARENTHOOD FEDERATION OF AMERICA INC: $27,077 · HealthALZHEIMER'S DISEASE RESEARCH FOUNDATION: $22,400 · HealthTHE METHODIST HOSPITAL FOUNDATION: $13,750 · HealthALZHEIMER'S FOUNDATION OF AMERICA INC: $7,000 · HealthTexas Children's Hospital: $6,150 · HealthMEMORIAL SLOAN-KETTERING CANCER CENTER: $5,820 · HealthEPILEPSY FOUNDATION OF TEXAS: $3,400 · HealthChildren's Hospital Colorado Foundation: $3,250 · Health+6 more: $6,090 · HealthPENOBSCOT BAY YMCA: $22,458 · Human ServicesThe Girls Foundation of Tanzania: $16,400 · Human ServicesTHE BOULDER JEWISH COMMUNITY CENTER: $7,475 · Human ServicesDEPELCHIN CHILDREN'S CENTER: $5,000 · Human ServicesKIDS' MEALS INC: $4,000 · Human ServicesTHE TANZANIAN CHILDRENS FUND INC: $3,800 · Human ServicesTHERE WITH CARE: $2,750 · Human Services+5 more: $5,250 · Human ServicesUNITED MIDCOAST CHARITIES INC: $21,513 · PhilanthropyGREATER HOUSTON COMMUNITY FOUNDATION: $11,340 · PhilanthropyUnited Way of Greater Houston: $8,000 · PhilanthropyCOLORADO GIVES FOUNDATION: $5,000 · PhilanthropyWatermans Community Center: $5,000 · PhilanthropyTIDES FOUNDATION: $3,500 · PhilanthropySAN ANTONIO AREA FOUNDATION: $2,000 · Philanthropy+3 more: $1,750 · PhilanthropyAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $21,900 · Civil RightsVOTEORG: $13,000 · Civil RightsEQUAL JUSTICE INITIATIVE: $10,000 · Civil RightsTHE CENTER FOR REPRODUCTIVE RIGHTS INC: $2,500 · Civil Rights+2 more: $2,250 · Civil Rights
Other$559,173Arts & Culture$430,322Education$397,063Health$94,937Human Services$67,133Philanthropy$58,103Civil Rights$49,650

Showing the 200 largest grantees by grant value.

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 budgetTHE WILLIAM A FARNSWORTH LIBRARY AND ART MUSEUM INC: $138,761 over 8y, 0.6% of budgetIsland Institute: $107,111 over 9y, 0.2% of budgetCONNECTICUT COLLEGE: $74,000 over 9y, 0.0% of budgetCHILDREN'S MUSEUM INC: $70,424 over 9y, 0.2% of budgetNATIONAL TRUST FOR HISTORIC PRESERVATION IN THE UNITED STATES: $55,000 over 3y, 0.0% of budgetFRIENDS OF THE STRAND THEATRE INC: $45,066 over 8y, 1.4% of budgetSAN FRANCISCO DAY SCHOOL: $35,500 over 8y, 0.0% of budgetPoe Elementary School PTO: $32,500 over 7y, 2.1% of budgetROCKPORT LIBRARY FOUNDATION: $30,947 over 3y, 1.7% of budgetPLANNED PARENTHOOD FEDERATION OF AMERICA INC: $27,077 over 5y, 0.0% of budgetDUKE UNIVERSITY: $23,500 over 9y, 0.0% of budgetPENOBSCOT BAY YMCA: $22,458 over 9y, 0.2% of budgetALZHEIMER'S DISEASE RESEARCH FOUNDATION: $22,400 over 9y, 0.0% of budgetAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $21,900 over 9y, 0.0% of budgetUNITED MIDCOAST CHARITIES INC: $21,513 over 9y, 0.6% of budgetALLEY THEATRE: $21,500 over 9y, 0.0% of budgetEVERYTOWN FOR GUN SAFETY SUPPORT FUND INC: $21,000 over 5y, 0.0% of budgetHermann Park Conservancy: $20,940 over 9y, 0.0% of budgetGROTON SCHOOL: $20,000 over 9y, 0.0% of budgetThe Girls Foundation of Tanzania: $16,400 over 8y, 1.3% of budgetTHE METHODIST HOSPITAL FOUNDATION: $13,750 over 6y, 0.0% of budgetVOTEORG: $13,000 over 6y, 0.4% of budgetST GEORGE'S SCHOOL: $13,000 over 9y, 0.0% of budgetGLIDE FOUNDATION: $12,800 over 5y, 0.0% of budgetGREATER HOUSTON COMMUNITY FOUNDATION: $11,340 over 5y, 0.0% of budgetPOMFRET SCHOOL INCORPORATED: $10,500 over 9y, 0.0% of budgetTeach for America Inc: $10,405 over 3y, 0.0% of budgetThe General Henry Knox Museum: $10,011 over 6y, 0.5% of budgetEQUAL JUSTICE INITIATIVE: $10,000 over 6y, 0.0% of budgetNEW ENGLAND HISTORIC GENEALOGICAL SOCIETY: $10,000 over 2y, 0.0% of budgetCAMDEN CONFERENCE: $9,013 over 5y, 1.1% of budgetVanderbilt University: $9,000 over 9y, 0.0% of budgetTHE COLORADO COLLEGE: $9,000 over 9y, 0.0% of budgetCENTER FOR CONTEMPORARY ART: $9,000 over 9y, 0.1% of budgetNORTH BRIDGE ACADEMY: $9,000 over 2y, 0.1% of budgetMaine Coast Heritage Trust: $9,000 over 9y, 0.0% of budgetTEXAS CHRISTIAN UNIVERSITY: $9,000 over 9y, 0.0% of budgetMAYSLES INSTITUTE INC: $8,500 over 9y, 0.2% of budgetUnited Way of Greater Houston: $8,000 over 3y, 0.0% of budgetHouston Public Media Foundation: $8,000 over 7y, 0.0% of budgetMenil Foundation Inc: $7,850 over 3y, 0.0% of budgetTHE MUSEUM OF FINE ARTS HOUSTON: $7,500 over 3y, 0.0% of budgetTHE UVA SCHOOL OF EDUCATION AND HUMAN DEVELOPMENT FOUNDATION INC: $7,500 over 8y, 0.1% of budgetTHE BOULDER JEWISH COMMUNITY CENTER: $7,475 over 6y, 0.0% of budgetALZHEIMER'S FOUNDATION OF AMERICA INC: $7,000 over 4y, 0.0% of budgetAstrodome Conservancy: $6,250 over 5y, 2.4% of budgetTexas Children's Hospital: $6,150 over 6y, 0.0% of budgetSAN FRANCISCO FOOD BANK: $6,050 over 6y, 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 THE WILLIAM A FARNSWORTH LIBRARY AND ART MUSEUM INC ↗
  • Who funds Island Institute ↗
  • Who funds CONNECTICUT COLLEGE ↗
  • Who funds CHILDREN'S MUSEUM INC ↗
  • Who funds NATIONAL TRUST FOR HISTORIC PRESERVATION IN THE UNITED STATES ↗
  • Who funds FRIENDS OF THE STRAND THEATRE INC ↗
  • Who funds SAN FRANCISCO DAY SCHOOL ↗
  • Who funds Poe Elementary School PTO ↗
  • Who funds ROCKPORT LIBRARY FOUNDATION ↗
  • Who funds PLANNED PARENTHOOD FEDERATION OF AMERICA INC ↗
  • Who funds DUKE UNIVERSITY ↗
  • Who funds PENOBSCOT BAY YMCA ↗
  • Who funds ALZHEIMER'S DISEASE RESEARCH FOUNDATION ↗
  • Who funds AMERICAN CIVIL LIBERTIES UNION FOUNDATION INC ↗
  • Who funds UNITED MIDCOAST CHARITIES INC ↗
  • Who funds ALLEY THEATRE ↗
  • Who funds EVERYTOWN FOR GUN SAFETY SUPPORT FUND INC ↗
  • Who funds Hermann Park Conservancy ↗
  • Who funds GROTON SCHOOL ↗
  • Who funds The Girls Foundation of Tanzania ↗
  • Who funds THE METHODIST HOSPITAL FOUNDATION ↗
  • Who funds VOTEORG ↗
  • Who funds ST GEORGE'S SCHOOL ↗
  • Who funds GLIDE FOUNDATION ↗
  • Who funds GREATER HOUSTON COMMUNITY FOUNDATION ↗
  • Who funds POMFRET SCHOOL INCORPORATED ↗
  • Who funds Teach for America Inc ↗

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.

Maine Community Found…Fisher Charitable Fou…Tr Ua the Camden Foun…Middlecott FoundationDavis Family Foundati…The Bertuzzi Family F…Community Foundation …Onion FoundationAlbert & Ethel Herzst…Angel FoundationMorton-Kelly Charitab…Strake Foundation
Maine Community Foundation IncME30.8× affinity17 shared granteesties to 10 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Maine Community Foundation Inc · Fisher Charitable Foundation · Tr Ua the Camden Foundation · Middlecott Foundation · Davis Family Foundation · The Bertuzzi Family Foundation · Community Foundation Boulder County · Onion Foundation · Albert & Ethel Herzstein Charitable Foundation · Angel Foundation · Morton-Kelly Charitable Trust · Strake 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 Otter Island Foundation funds: left to right is the share of its income from government, bottom to top the share from Otter Island Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 60%0%1%3%5%funder's share of their income ↑0%13%25%38%50%share of the org’s income from government →median 2%
  • Trustees of Boston University: 12% of income from government
  • Society for the Preservation of New Engl: 2% of income from government
  • The Trustees of the Smith College: 1% of income from government
  • Connecticut College: 0% of income from government
no gov moneyreceives it· size = income
6get no government money at all
36report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–50%
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 219 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 Otter Island’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