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Colorado · Private foundation

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.

$90k
Granted FY2025(still arriving)
13
Grants FY2025
10
Organizations funded FY2024
50%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$1,000
Largest grant, FY2025
$69,399
Organizations funded a year
7 to 13
FY2018 to FY2024
States reached, FY2025
6
Total assets, FY2025
$618k
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 50% of the organizations Island Foundation funded were first-time grantees, receiving 2% of its grant dollars.

New vs renewed · share of each year

In FY2024, 98% of grant dollars renewed an existing relationship; $3k 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
EducationEnvironmentAnimalsArts & CultureCivil RightsInternationalOther
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 arriving12$90k25%
FY202410$149k50%
FY202311$162k55%
FY20227$47k29%
FY202113$148k46%
FY202011$496k55%
FY201911$313k73%
FY20189$101k56%
94% classified

What it funded, over time

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

Animals$1.1MEducation$209kEnvironment$94kScience & Tech$50kPublic Benefit$16kHealth$5kSocial Science$5kArts & Culture$5kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

MT
IL
NY
MA
IA
OH
NJ
CA
CO
WV
VA
NC
DC
LA
MS
TX

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 30 grantees
All grantees of Island Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Wildlife Conservation Society$1,155,13190%
Duke University$127,00020%
The Pacific Forest Trust Incorporated$30,73170%
Mongabay Org Corp$25,50040%
Brooks School$17,14440%
The Voter Participation Center$15,00010%
Rainforest Trust$14,50010%
Wildlife Protection Solutions$10,07330%
Resources Legacy Fund$8,00010%
The Turtle Survival Alliance Foundation$6,80020%
Rewild$5,00010%
Griot Arts Inc$5,00020%
Island Conservation$3,50010%
Rare$2,64310%
Iowa State University$2,5001n/a
Buckley Country Day School$2,50010%
Hawken School$2,25030%
Cleveland Philanthropy$2,0001n/a
Wildaid Inc$2,00010%
Wikimedia Foundation Inc$1,62570%
Trout Unlimited Inc$1,60020%
Kew Foundation America$1,00010%
One Montana$1,00010%
Community Initiatives$1,00010%
International Documentary Foundation Inc$1,00010%
The Andrew Goodman Foundation Inc$1,00010%
Harvard Magazine Inc$5001n/a
Pro Publica Inc$50020%
World Wildlife Fund Inc$38910%
Center for the Study of Services$2501n/a

What it could do for these grantees

Plus 19 recipients with no EIN on record ($102k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Island Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetWildlife Conservation Society: $1,155,131 over 9y, 0.2% of budgetDuke University: $127,000 over 2y, 0.0% of budgetThe Pacific Forest Trust Incorporated: $30,731 over 7y, 0.3% of budgetMongabay Org Corp: $25,500 over 4y, 0.2% of budgetBrooks School: $17,144 over 4y, 0.0% of budgetThe Voter Participation Center: $15,000 over 1y, 0.0% of budgetRainforest Trust: $14,500 over 1y, 0.1% of budgetWildlife Protection Solutions: $10,073 over 3y, 0.1% of budgetResources Legacy Fund: $8,000 over 1y, 0.0% of budgetThe Turtle Survival Alliance Foundation: $6,800 over 2y, 0.4% of budgetRewild: $5,000 over 1y, 0.0% of budgetGriot Arts Inc: $5,000 over 2y, 0.3% of budgetIsland Conservation: $3,500 over 1y, 0.1% of budgetRare: $2,643 over 1y, 0.0% of budgetBuckley Country Day School: $2,500 over 1y, 0.0% of budgetHawken School: $2,250 over 3y, 0.0% of budgetWildaid Inc: $2,000 over 1y, 0.0% of budgetWikimedia Foundation Inc: $1,625 over 7y, 0.0% of budgetTrout Unlimited Inc: $1,600 over 2y, 0.0% of budgetKew Foundation America: $1,000 over 1y, 0.3% of budgetOne Montana: $1,000 over 1y, 0.3% of budgetCommunity Initiatives: $1,000 over 1y, 0.0% of budgetInternational Documentary Foundation Inc: $1,000 over 1y, 0.0% of budgetThe Andrew Goodman Foundation Inc: $1,000 over 1y, 0.0% of budgetPro Publica Inc: $500 over 2y, 0.0% of budgetWorld Wildlife Fund Inc: $389 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 26.

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.

The David and Lucile Packard FoundationCA13.1× affinity4 shared granteesties to 10 of 10Hover any node to trace its alignments.Compare side by side →

Open a dossier: The David and Lucile Packard Foundation · Silicon Valley Community Foundation · National Philanthropic Trust · Vanguard Charitable Endowment Program · The Pfizer Foundation Inc · American Endowment Foundation · Donor Advised Charitable Giving Inc · The Bank of America Charitable Foundation Inc · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · 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.

Compare Island Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Island Foundation?

Find your warmest path to Island 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 Island Foundation

How much does Island Foundation give?
Island Foundation reported 13 grants totaling $89,787 in its FY2025 IRS filing. It funded between 7 and 13 organizations a year over FY2018 to FY2024.
What does Island Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Animals (74%), Education (14%), Environment (6%).
Who are Island Foundation's largest grantees?
By total granted over FY2017 to FY2025: Wildlife Conservation Society ($1.2M), Duke University ($127k), The Pacific Forest Trust Incorporated ($31k).
Does Island Foundation fund new organizations?
In FY2024, 50% of the organizations it funded were first-time grantees.
Does Island 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 Island Foundation?
Its strongest co-funders, measured against what their size predicts, include The David and Lucile Packard Foundation, Silicon Valley Community Foundation, National Philanthropic Trust.
Where is Island Foundation based?
Island Foundation is based in CO.

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

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