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Mad River Foundation at a glance

· Private foundation

Mad River 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.

$120k
Granted FY2022
49
Grants FY2022
16
States reached
$15k
Largest
01What it fundsRead
02Its fieldRead
03Through PlinthRead
01What it funds
0191% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2021 to 2025.

Education$26kHealth$19kAnimals$18kPhilanthropy$13kReligion$11kHuman Services$7kEnvironment$6kInternational$4kOther$0
02FY2022 · 49 grants

Where the money goes

Grants by size, and the largest recipients.

How this is measured
The 49 grants below total $108,750, the rows itemized in this filing. The $120,000 headline is the total grant expense on the return; the other $11,250 is giving the schedule does not break out (grants under the $5,000 itemization floor, grants to individuals, grants on other schedules). Every figure below describes the itemized rows only.

By grant size · FY2022

  • Under $10k46 grants · $74k
  • $10k–50k3 grants · $35k
$1,000
Median grant
16
States reached
$871k
Total assets
Largest grants
RecipientAmount
Animal Welfare Society$15,000
Greenwich Hospital Fdn$10,000
Greenwich Library$10,000
Betty Ford Hazelden Foundation$7,500
Madeira School$5,000
Christ Church$5,000
Family Center of Greenwich$5,000
United Way of Greenwich$5,000
GlobalGiving$3,250
Scarborough Land Trust$2,500
College of Charleston$2,500
Sunshine Gospel Ministries$2,000
Montana Family Foundation$2,000
Gallatin County Love Inc.$2,000
Freedom Institute$2,000
02Its 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
Marine Biological Laboratory

The Marine Biological Laboratory (MBL) is a world-renowned center for biological discovery and training that is notably affiliated with more than 60 Nobel Prize winners. Research is conducted by full-time faculty as well as hundreds of the…

Science & Tech
2
World Resources Institute

Wri is committed to creating change that improves people's lives and ensures the natural world can thrive. (see schedule o)wri's bold vision requires a formula for success we call "count it. change it. scale it.":- count it: our work is…

International
3
Gloucester Marine Genomics Institute Incorporated

Gloucester marine genomics institute's mission is to address critical challenges in ocean health, human health, and the environment through innovative marine biotechnology research and transformative science education. by combining…

Science & Tech
4
Boston Architectural College

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

—
5
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.

—
6
Wentworth Institute of Technology Inc

Wentworth institute of technology is a nationally recognized private coeducational and residential university of higher education with a mission to empower, inspire and innovate through experiential learning with a core purpose of career…

Education
7
Open Markets Institute

The open markets institute works to help people relearn how to use competition policy to build stronger democracies, more just and equitable societies, more innovative and sustainable economies, and a more secure and peaceful world.

Education
8
Seattle Biomedical Research Institute

We conduct fundamental infectious disease research to generate critical new knowledge about pathogens and their interactions with see schedule o for continuationhumans to enable the discovery and development of novel interventions,…

—
9
Boston Harbor Now Inc

Our mission is to ensure that the people of greater boston benefit from a vibrant, resilient, and inclusive waterfront, harbor, and islands; these spaces are equitable, accessible, and adapted to climate change; and to ensure our public,…

Environment
10
Mass General Brigham Health Plan Inc

Mass general brigham health plan's mission is to promote the health and wellness of our members, and to help ensure equitable, affordbale health care for the diverse communities we serve.

Health
11
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
12
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
How this is measured
The grantee most central to the portfolio’s shape is Mcdonogh School Incorporated; the most unlike its peers is Dana-Farber Cancer Institute Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
03the grantee network

29 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. 29 of the 48 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)
5
Early backer (in before they grew)
29/29
Grantees still filing
19/29
Grew since first funded

Where the money sits, by cause and then by grantee

Betty Ford Hazelden Foundation: $7,500 · OtherBetty Ford Hazelden FoundationChrist Church: $5,000 · OtherChrist ChurchUNITED WAY OF GREENWICH INC: $5,000 · OtherUNITED WAY OF GREENWICH INCFamily Center of Greenwich: $5,000 · OtherFamily Center of GreenwichScarborough Land Trust: $2,500 · OtherCollege of Charleston: $2,500 · OtherSUNSHINE GOSPEL MINISTRIES: $2,000 · OtherGALLATIN COUNTY LOVE INC: $2,000 · Other+19 more: $16,000 · Other+19 moreTHE GREENWICH LIBRARY: $10,000 · EducationTHE GREENWICH LIBRAR…The Madeira School: $6,000 · EducationThe Madeira SchoolTrustees of Tufts College: $1,500 · EducationTrustees of Tufts Co…BELMONT HILL SCHOOL INC: $1,000 · EducationMCDONOGH SCHOOL INCORPORATED: $1,000 · Education+1 more: $500 · EducationANIMAL WELFARE SOCIETY INC: $15,000 · AnimalsANIMAL WELFARE SO…PROUTS NECK AUDUBON SOCIETY: $1,000 · AnimalsPROUTS NECK AUDUB…+1 more: $500 · AnimalsGREENWICH HOSPITAL: $10,000 · HealthGREENWICH HOSPIT…FREEDOM INSTITUTE INC: $2,000 · HealthFREEDOM INSTITUT…ST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $1,500 · HealthST JUDE CHILDREN…Dana-Farber Cancer Institute Inc: $1,500 · HealthDana-Farber Canc…+1 more: $500 · HealthGLOBALGIVING FOUNDATION INC: $3,250 · InternationalRAFIKI FOUNDATION INC: $1,000 · InternationalWORLD CENTRAL KITCHEN INC: $500 · InternationalBARRIER ISLAND PARKS SOCIETY INC: $1,000 · EnvironmentCHESAPEAKE BAY FOUNDATION INC: $1,000 · EnvironmentNATURAL RESOURCES DEFENSE COUNCIL INC: $500 · EnvironmentMontana Family Foundation Inc: $2,000 · Public Benefit
Other$47,500Education$20,000Animals$16,500Health$15,500International$4,750Environment$2,500Public Benefit$2,000

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 budgetANIMAL WELFARE SOCIETY INC: $15,000 over 1y, 0.5% of budgetTHE GREENWICH LIBRARY: $10,000 over 1y, 0.2% of budgetGREENWICH HOSPITAL: $10,000 over 1y, 0.0% of budgetThe Madeira School: $6,000 over 1y, 0.0% of budgetUNITED WAY OF GREENWICH INC: $5,000 over 1y, 0.3% of budgetGLOBALGIVING FOUNDATION INC: $3,250 over 1y, 0.0% of budgetFREEDOM INSTITUTE INC: $2,000 over 1y, 0.1% of budgetSUNSHINE GOSPEL MINISTRIES: $2,000 over 1y, 0.1% of budgetMontana Family Foundation Inc: $2,000 over 1y, 1.2% of budgetGALLATIN COUNTY LOVE INC: $2,000 over 1y, 0.1% of budgetST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $1,500 over 1y, 0.0% of budgetDana-Farber Cancer Institute Inc: $1,500 over 1y, 0.0% of budgetTrustees of Tufts College: $1,500 over 1y, 0.0% of budgetBARRIER ISLAND PARKS SOCIETY INC: $1,000 over 1y, 0.1% of budgetBELMONT HILL SCHOOL INC: $1,000 over 1y, 0.0% of budgetATLANTIC WHITE SHARK CONSERVANCY INC: $1,000 over 1y, 0.1% of budgetAGAWAM COUNCIL: $1,000 over 1y, 0.1% of budgetRAFIKI FOUNDATION INC: $1,000 over 1y, 0.0% of budgetPROUTS NECK AUDUBON SOCIETY: $1,000 over 1y, 1.5% of budgetCHESAPEAKE BAY FOUNDATION INC: $1,000 over 1y, 0.0% of budgetMCDONOGH SCHOOL INCORPORATED: $1,000 over 1y, 0.0% of budgetTHE ISLAND SCHOOL INC: $500 over 1y, 0.0% of budgetSUNCOAST HUMANE SOCIETYINC: $500 over 1y, 0.0% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $500 over 1y, 0.0% of budgetFOOD LINK INC: $500 over 1y, 0.0% of budgetBOCA GRANDE HEALTH CLINIC FNDTN INC: $500 over 1y, 0.0% of budgetWORLD CENTRAL KITCHEN INC: $500 over 1y, 0.0% of budgetPLANNED PARENTHOOD FEDERATION OF AMERICA INC: $500 over 1y, 0.0% of budgetSOUTHERN POVERTY LAW CENTER INC: $500 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.

Ge Aerospace Foundati…Raymond James Charita…American Endowment Fo…National Philanthropi…Vanguard Charitable E…The Pfizer Foundation…The Bank of America C…Donor Advised Charita…Natl Christian Charit…Fidelity Investments …American Online Givin…Amazonsmile Foundation
Ge Aerospace FoundationCT11.2× affinity4 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Ge Aerospace Foundation · Raymond James Charitable Endowment Fund · American Endowment Foundation · National Philanthropic Trust · Vanguard Charitable Endowment Program · The Pfizer Foundation Inc · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · Natl Christian Charitable Fdn Inc · Fidelity Investments Charitable Gift Fund · American Online Giving Foundation 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.
03Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Mad River Foundation?

Find your warmest path to Mad River Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

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 48 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 2022, released 2022. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Possibly out of date. A more recent filing (FY2025) is on record and reports $122k of grant expense with no grantee named in the published copy. A private foundation itemizes every grant it makes, so a return carrying none has filed its list as an attachment that the public copy does not include. The figures above are therefore from FY2022, the most recent year this funder’s grantee list reached the public record.

Source object · view filing

Play a game based on Mad River’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