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Washington · Public charity

Arboretum Foundation

The ARBORETUM FOUNDATION promotes, protects, and enhances the washington park arboretum for current and future generations by strengthening and building a diverse and engaged community of donors, volunteers, and advocates.

$1.0M
Granted FY2025(still arriving)
2
Grants FY2025
1
Organizations funded FY2024
0%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$965,552
Largest grant, FY2025
$965,552
Organizations funded a year
1 to 3
FY2018 to FY2024
States reached, FY2025
1
Total assets, FY2025
$14M

How open it is to new grantees

In FY2024, 0% of the organizations Arboretum Foundation funded were first-time grantees, receiving 0% of its grant dollars.

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 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
Arts & CultureOther
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 arriving2$1.0M50%
FY20241$1.6M0%
FY20232$1.5M0%
FY20222$1.4M0%
FY20212$784k0%
FY20203$663k67%
FY20192$769k0%
FY20183$568k67%
100% classified

What it funded, over time

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

Recreation & Sports$4.1MEducation$3.4MEnvironment$839kEmployment$244kArts & Culture$5k

Top grantees

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

GranteeTotal grantedYearsShare of their budget
University of Washington$6,917,1098n/a
University of Washington$244,4801n/a
City of Seattle$38,5181n/a
The Student Conservation Association Inc$15,00010%
History Ink$5,0001n/a

Plus 2 recipients with no EIN on record ($1.4M), not named here.

Compare Arboretum Foundation with peer funders

About Arboretum Foundation

How much does Arboretum Foundation give?
Arboretum Foundation reported 2 grants totaling $1,004,070 in its FY2025 IRS filing. It funded between 1 and 3 organizations a year over FY2018 to FY2024.
What does Arboretum Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Recreation & Sports (48%), Education (39%), Environment (10%).
Who are Arboretum Foundation's largest grantees?
By total granted over FY2017 to FY2025: University of Washington ($6.9M), University of Washington ($244k), City of Seattle ($39k).
Does Arboretum Foundation fund new organizations?
In FY2024, 0% of the organizations it funded were first-time grantees.
Where is Arboretum Foundation based?
Arboretum Foundation is based in WA.

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 7 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 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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