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.
Public Charity
ARBORETUM FOUNDATION
ARBORETUM FOUNDATION, of SEATTLE, WA, is a Public Charity tracked in Imperigo's IRS 990 database. The 2025 filing shows $7.9M in revenue, $3.6M in expenses, $14.4M in total assets. 112 publicly reported grants to this organization, totaling roughly $3.2M, appear in IRS filings.
EIN: 910613583
SEATTLE, WA
Latest filing: 2025
Total Revenue$7.9M
Total Expenses$3.6M
Total Assets$14.4M
Grant Records112
Funding Total$3.2M
Filing Years2021–2025
Sample Grants Received
ENVIRONMENTAL AND ANIMALS
$109,298
CIVIC AND CULTURAL PROGRAMMING
$100,000
GENERAL SUPPORT
$47,226
For grant recipient's exempt purposes
$36,800
FOR THE ARBORIST/HORTICULTURE PROGRAM
$30,000
Showing up to 5 of 112 total records — full history available with membership.
Officers & Directors
VICE PRESIDENT
Alissa Rupp
BOARD MEMBER
Barbara Jacobson
BOARD MEMBER
Barbara Wright
BOARD MEMBER
Bill Mcgee
ADVANCEMENT DIRECTOR
Clare Hausmann
BOARD MEMBER
Glenn Pinqul
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2025 | $7.9M | $3.6M | $14.4M |
| 2024 | $4.0M | $3.4M | $11.7M |
| 2023 | $4.8M | $2.9M | $10.4M |
| 2022 | $5.0M | $2.8M | $8.0M |
| 2021 | $2.5M | $1.9M | $6.8M |
Between 2021 and 2025, reported annual revenue grew from $2.5M to $7.9M (+220%), with total assets most recently reported at $14.4M.
Interactive year-over-year charts and full filing details available with membership.