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New York · Private foundation

The Margot Marsh Biodiversity 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.

$449k
Granted FY2025(still arriving)
17
Grants FY2025
16
Organizations funded FY2024
25%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$20,000
Largest grant, FY2025
$150,000
Organizations funded a year
11 to 23
FY2018 to FY2024
States reached, FY2025
9
Total assets, FY2025
$1.7M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 25% of the organizations The Margot Marsh Biodiversity Foundation funded were first-time grantees, receiving 13% of its grant dollars.

New vs renewed · share of each year

In FY2024, 87% of grant dollars renewed an existing relationship; $66k went to new ones.

50%100%’18’19’20’21’22’23’24
RenewedFirst-time

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

’18’19’20’21’22’23’24
AnimalsEducationPhilanthropyEnvironmentOther
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 arriving13$449k31%
FY202416$504k25%
FY202314$445k36%
FY202213$511k23%
FY202111$494k45%
FY202023$668k35%
FY201920$537k45%
FY201818$517k61%
100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Animals$2.8MEnvironment$1.7MEducation$146kArts & Culture$30kReligion$25kHealth$20k

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

ME
WA
MN
IL
WI
MI
NY
MA
OR
OH
PA
NJ
CA
CO
NE
KY
VA
MD
NC
DC
GA
TX
FL

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

Show all 38 grantees
All grantees of The Margot Marsh Biodiversity Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Rewild$1,633,20091%
Gorilla Rehabilitation Conservation Education (Grace) Center Inc$193,00053%
Wild Earth Allies Inc$185,00091%
Fauna & Flora International USA Inc$151,00063%
Friends of Bonobos$142,00072%
Lincoln Park Zoological Society$135,00060%
Wildlife Conservation Society$129,50030%
Conservation International Foundation$106,60040%
Bonobo Conservation Initiative$90,00056%
The New Nature Foundation$86,200511%
International Primatological Society$85,000420%
Conservation Fusion Inc$80,000417%
Omaha Zoological Society$80,00030%
Zoological Society of Cincinnati$75,00030%
Dian Fossey Gorilla Fund International Inc$41,47530%
Seacology$40,50040%
Houston Zoo Inc$40,00020%
Kasiisi Project Inc$39,50032%
Duke University$25,82420%
Save the Golden Lion Tamarin$25,000113%
Denver Zoological Foundation$25,00020%
Grace$25,0001n/a
The Trustees of Princeton University$20,00010%
Jane Goodall Institute for Wildlife Research Education and Conservation$18,00010%
MGVP INC Mountain Gorilla Veterinary Project$15,00011%
Drexel University$15,00010%
Fordham University$15,00010%
Community Conservation Inc$15,0001n/a
Orangutan Outreach Inc Attn Richard Zimmerman$15,00014%
Rainforest Partnership$12,00014%
Cornell University$11,00010%
Wildlife Alliance Inc$10,00010%
Pan African Sanctuary Alliance Inc$10,00011%
Lemur Love Inc$10,0001n/a
Environmental Education & Conservation Global Inc$10,000119%
Children of Conservation Inc$10,00016%
Trustees of Boston University$10,00010%
The Orangutan Conservancy$10,0001n/a

What it could do for these grantees

Plus 33 recipients with no EIN on record ($1.1M), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget The Margot Marsh Biodiversity Foundation supplied at peak.

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetRewild: $1,633,200 over 9y, 1.5% of budgetGorilla Rehabilitation Conservation Education (Grace) Center Inc: $193,000 over 5y, 3.1% of budgetWild Earth Allies Inc: $185,000 over 9y, 0.7% of budgetFauna & Flora International USA Inc: $151,000 over 6y, 2.9% of budgetFriends of Bonobos: $142,000 over 7y, 2.2% of budgetLincoln Park Zoological Society: $135,000 over 6y, 0.1% of budgetWildlife Conservation Society: $129,500 over 3y, 0.0% of budgetConservation International Foundation: $106,600 over 4y, 0.0% of budgetBonobo Conservation Initiative: $90,000 over 5y, 6.0% of budgetThe New Nature Foundation: $86,200 over 5y, 11% of budgetInternational Primatological Society: $85,000 over 4y, 20% of budgetConservation Fusion Inc: $80,000 over 4y, 17% of budgetOmaha Zoological Society: $80,000 over 3y, 0.1% of budgetZoological Society of Cincinnati: $75,000 over 3y, 0.0% of budgetDian Fossey Gorilla Fund International Inc: $41,475 over 3y, 0.2% of budgetSeacology: $40,500 over 4y, 0.5% of budgetHouston Zoo Inc: $40,000 over 2y, 0.0% of budgetKasiisi Project Inc: $39,500 over 3y, 2.3% of budgetDuke University: $25,824 over 2y, 0.0% of budgetSave the Golden Lion Tamarin: $25,000 over 1y, 13% of budgetDenver Zoological Foundation: $25,000 over 2y, 0.0% of budgetThe Trustees of Princeton University: $20,000 over 1y, 0.0% of budgetJane Goodall Institute for Wildlife Research Education and Conservation: $18,000 over 1y, 0.1% of budgetMGVP INC Mountain Gorilla Veterinary Project: $15,000 over 1y, 0.9% of budgetDrexel University: $15,000 over 1y, 0.0% of budgetFordham University: $15,000 over 1y, 0.0% of budgetOrangutan Outreach Inc Attn Richard Zimmerman: $15,000 over 1y, 3.7% of budgetRainforest Partnership: $12,000 over 1y, 4.0% of budgetCornell University: $11,000 over 1y, 0.0% of budgetWildlife Alliance Inc: $10,000 over 1y, 0.1% of budgetPan African Sanctuary Alliance Inc: $10,000 over 1y, 0.6% of budgetEnvironmental Education & Conservation Global Inc: $10,000 over 1y, 19% of budgetChildren of Conservation Inc: $10,000 over 1y, 6.0% of budgetTrustees of Boston University: $10,000 over 1y, 0.0% 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 34.

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.

Columbus Zoological Park AssociationOH20× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Columbus Zoological Park Association · Arcus Foundation · Seaworld & Busch Gardens Conservation Fund · National Geographic Society · Globalgiving Foundation Inc · AbbVie Foundation · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc · Donor Advised Charitable Giving Inc · Network for Good · American Online Giving Foundation Inc · The Bank of America Charitable Foundation Inc

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 The Margot Marsh Biodiversity Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to The Margot Marsh Biodiversity Foundation?

Find your warmest path to The Margot Marsh Biodiversity 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.

About The Margot Marsh Biodiversity Foundation

How much does The Margot Marsh Biodiversity Foundation give?
The Margot Marsh Biodiversity Foundation reported 17 grants totaling $448,900 in its FY2025 IRS filing. It funded between 11 and 23 organizations a year over FY2018 to FY2024.
What does The Margot Marsh Biodiversity Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Animals (60%), Environment (36%), Education (3%).
Who are The Margot Marsh Biodiversity Foundation's largest grantees?
By total granted over FY2017 to FY2025: Rewild ($1.6M), Gorilla Rehabilitation Conservation Education (Grace) Center Inc ($193k), Wild Earth Allies Inc ($185k).
Does The Margot Marsh Biodiversity Foundation fund new organizations?
In FY2024, 25% of the organizations it funded were first-time grantees.
Does The Margot Marsh Biodiversity 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 The Margot Marsh Biodiversity Foundation?
Its strongest co-funders, measured against what their size predicts, include Columbus Zoological Park Association, Arcus Foundation, Seaworld & Busch Gardens Conservation Fund.
Where is The Margot Marsh Biodiversity Foundation based?
The Margot Marsh Biodiversity Foundation is based in NY.

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 72 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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