ARBORETUM FOUNDATION

SEATTLE, WA, 98112 (206) 325-4510 Est. 1937 EIN 91-0613583
C114 - Environment 990 - Public charity return 501(c)(3)
www.arboretumfoundation.org

Mission

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.

Giving Portfolio

Total Grants
15
Total Giving
$7.5M
Recipients
15
Years Active
2017 - 2024
Avg grant: $614,779 Median: $502,035

Yearly Trends

YearGrantsTotal Giving Avg GrantNewRepeat
20242$1.0M $502K11
20231$1.6M $1.6M01
20222$1.5M $740K02
20212$1.4M $679K02
20202$787K $394K02
20193$703K $234K21
20173$568K $189K30

Sectors Funded

Arts, Culture & Humanities
1

Top States

Washington
14
New Hampshire
1

Grantee Size Profile

$10M - $50M
1
$500K - $1M
1

Top Grantees

UNIVERSITY OF WASHINGTON
WA - 7 grants
$6.3M
CITY OF SEATTLE - SEATTLE PARKS AND RECREATION
WA - 4 grants
$929K
CITY OF SEATTLE
WA
$225K
CITY OF SEATTLE - SEATTLE PARKS AND RECREATION
WA
$39K

Grants Awarded · 7 grants

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Financials

Total Revenue
$7,864,410
Total Expenses
$3,622,465
Net Assets
$14,226,596
18 employees 550 volunteers
From latest filing (tax period ending 2025-06-30)

Financial Health

Operating Reserve
3.9 years Healthy
Net assets / monthly expenses
Year-over-Year Change
Revenue ↑ 94.5%
Expenses ↑ 7.7%
Revenue Sources
Contributions 65.0% Earned revenue 1.9% Investment 31.2% Other 2.0%
Expense Breakdown
Program 64.7% Management 19.1% Fundraising 16.2%

Officers & Trustees (22)

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Filing History (7 filings)

YearRevenueExpensesNet Assets
2024 990 - Public charity return
Jul 1, 2024 to Jun 30, 2025
$7,864,410 ↑$3,622,465$14,226,596
2023 990 - Public charity return
Jul 1, 2023 to Jun 30, 2024
$4,043,563 ↓$3,363,272$11,478,746
2022 990 - Public charity return
Jul 1, 2022 to Jun 30, 2023
$4,785,446 ↓$2,906,886$10,176,675
2021 990 - Public charity return
Jul 1, 2021 to Jun 30, 2022
$4,956,558 ↑$2,837,334$7,897,745
2020 990 - Public charity return
Jul 1, 2020 to Jun 30, 2021
$2,456,689 ↑$1,885,963$6,619,504
2019 990 - Public charity return
Jul 1, 2019 to Jun 30, 2020
$1,607,358 ↓$1,864,205$5,260,639
2017 990 - Public charity return
Jul 1, 2017 to Jun 30, 2018
$1,732,743 $1,509,158$4,154,579

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EIN: 91-0613583 · Source: IRS Form 990 e-file data