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.
Arboretum Foundation at a glance
In short: Arboretum Foundation gave $1.0M across 2 grants in 2025 (avg $502K), mostly in Washington. Source: 2025 IRS Form 990.
- Annual giving (2025)
- $1,004,070
- -35.8% vs 2024
- Grants made (2025)
- 2
- +100.0% vs 2024
- Average grant
- $502,035
- -67.9% vs 2024
- Median grant
- $502,035
- Total assets
- $14,446,067
- +23.5% vs 2024
- Primary geography
- Washington (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Arboretum Foundation funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2025
The largest 2025 recipient was University of Washington ($966K). Together the top 2 received $1.0M.
Grant Size Distribution
9 grants across all recorded years
The most common grant size was in the $500K–1M range: 4 grants of 9 (44%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 2 itemized grants.
States
Cities
How Arboretum Foundation gives
- Giving fell 26% from 2022 to 2025. Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $703K (2020) to $1.6M (2024). In 2025 it made 2 grants totaling $1.0M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Washington Seattle, WA | Capital Projects, Maintenance, Education, and Other | $965,552 |
| City of Seattle - Seattle Parks and Recreation Seattle, WA | Capital Projects, Maintenance, Education, and Other | $38,518 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $14,446,067 | $7,864,410 | $3,622,465 | $1,004,070 | 2 | $2,452,993 |
| 2024 | $11,699,187 | $4,043,563 | $3,363,272 | $1,564,928 | 1 | $215,671 |
| 2023 | $10,433,351 | $4,785,446 | $2,906,886 | $1,479,510 | 2 | $178,774 |
| 2022 | $8,009,608 | $4,956,558 | $2,837,334 | $1,358,804 | 2 | $128,274 |
| 2021 | $6,821,589 | $2,456,689 | $1,885,963 | $787,152 | 2 | $223,601 |
| 2020 | $5,481,104 | $1,607,358 | $1,864,205 | $703,371 | 3 | $231,726 |
| 2019 | $5,665,575 | $3,193,213 | $1,793,010 | $768,676 | 2 | $218,283 |
About Arboretum Foundation
Based on IRS filings
Arboretum Foundation is a public charity focused on Environment & Animals, based in Seattle, WA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $14.4M in total assets. In 2025, it awarded 2 grants totaling $1.0M. Net investment income was $2.5M.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Arboretum Foundation is led by Jane Stonecipher, Executive Director on every filing since 2019; 2 of 22 officers listed in 2025 are compensated.
Officers on the 2025 filing
Jane Stonecipher
Executive Director
On filings since 2019
40 hrs/week
$134K (2019) → $151K (2025)
Maribeth O'Connor
President
Vice President → President, 2025
On filings since 2022
10 hrs/week
No compensation reported
Clare Hausmann
Advancement Director
On filings since 2024
40 hrs/week
$123K (2024) → $127K (2025)
Jeff Lehman
Treasurer
Board Member → Vice President, 2021
Vice President → Treasurer, 2022
On filings since 2019
6 hrs/week
No compensation reported
Missy Ward
Board Member
Treasurer → Board Member, 2021
On filings since 2019
2 hrs/week
No compensation reported
Peter Rees
Vice President
Treasurer → President, 2022
President → Vice President, 2025
On filings since 2019
4 hrs/week
No compensation reported
Josh Dickson
Secretary
Board Member → Secretary, 2024
On filings since 2020
6 hrs/week
No compensation reported
Larry Hubbell
Board Member
On filings since 2020
2 hrs/week
No compensation reported
Mike Riley
Vice President
Vice President → Board Member, 2022
Board Member → Vice President, 2025
On filings since 2020
4 hrs/week
No compensation reported
Shaun Corry
Board Member
On filings since 2020
2 hrs/week
No compensation reported
Bill McGee
Board Member
On filings since 2021
2 hrs/week
No compensation reported
Scott Lindsay
Vice President
Vice President → Board Member, 2023
Board Member → Vice President, 2024
On filings since 2021
4 hrs/week
No compensation reported
Alissa Rupp
Vice President
Board Member → Vice President, 2025
On filings since 2022
4 hrs/week
No compensation reported
John Reed
Vice President
Board Member → Vice President, 2025
On filings since 2022
2 hrs/week
No compensation reported
Kara Weaver
Board Member
On filings since 2024
2 hrs/week
No compensation reported
Barbara Jacobson
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Barbara Wright
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Glenn Pinqul
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Joaquin Hernandez
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Lisa Vasser
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Thatcher Bailey
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Virginia Korycki
Board Member
New on the 2025 filing
2 hrs/week
No compensation reported
Former officers (32)
- Former: Jennifer Wyatt (2019–2024) — Vice President
- Former: Noriko Palmer (2019–2024) — Board Member
- Former: Steve Alley (2020–2024) — Vice President
- Former: Brittany Bolstad (2021–2024) — Finance Director
- Former: Joanna Thiagarajan (2021–2024) — Board Member
- Former: Tyler Moriguchi (2021–2024) — Board Member
- Former: Beverly Song (2022–2024) — Board Member
- Former: Lisa Youngblood Hall (2022–2024) — Board Member
- Former: Yuka Shimizu (2022–2024) — Board Member
- Former: Connor Barclay (2024) — Board Member
- Former: Sanjay Kumar (2024) — Board Member
- Former: Jeanne Peterson (2019–2023) — Secretary
- Former: Trinna Wherry (2019–2023) — Vice President
- Former: Kat Korab (2020–2023) — Board Member
- Former: Bowman Neely (2021–2023) — Board Member
- Former: Carol Hoerster (2019–2022) — Board Member
- Former: Jenny Wyatt (2020–2022) — Vice President
- Former: Mark Rowley (2020–2022) — Board Member
- Former: Diane Adachi (2019–2021) — Board Member
- Former: Heidi Richardson (2019–2021) — Board Member
- Former: Jan Kirkwood Waszak (2019–2021) — Board Member
- Former: Jason Morse (2019–2021) — Vice President
- Former: Joan Affleck-Smith (2019–2021) — Board Member
- Former: Paul Vonckx (2019–2021) — Vice President
- Former: Sherrey Luetjen (2019–2021) — Vice President
- Former: Chris Harry (2020–2021) — Board Member
- Former: Gary Wortzel (2019–2020) — Finance Director
- Former: Carolyn Kitchell (2019) — Board Member
- Former: Jim Reid (2019) — Vice President
- Former: Roger Williams (2019) — Board Member
- Former: Stephen Alley (2019) — Board Member
- Former: Tobin Booth (2019) — Board Member
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $151K, to Jane Stonecipher (Executive Director Through December). 2 officers or directors reported compensation on that filing.
Frequently asked questions about Arboretum Foundation
How much does Arboretum Foundation give each year?
Arboretum Foundation gave $1.0M across 2 grants in 2025, according to its 2025 IRS Form 990. In 2024 it gave $1.6M across 1 grant.
How large is Arboretum Foundation?
Arboretum Foundation reported $14.4M in total assets on its 2025 IRS Form 990. Its revenue that year was $7.9M.
What is Arboretum Foundation?
Arboretum Foundation is a public charity focused on Environment & Animals, based in Seattle, WA. It holds $14.4M in total assets as of 2025.
Where does Arboretum Foundation operate?
Arboretum Foundation has awarded grants in New Hampshire, Washington.
What is Arboretum Foundation's EIN?
Arboretum Foundation's EIN (Employer Identification Number) is 91-0613583. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2019 (received by the IRS April 30, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS May 5, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS May 16, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS May 11, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS March 27, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS February 26, 2025)
- Updated Form 990 for fiscal year 2025 (received by the IRS March 20, 2026)
- IRS filings on file for fiscal years 2019–2025
Live grants for the work Arboretum Foundation funds
Environment & Animals Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Arboretum Foundation's focus areas in our free grants database
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Arboretum Foundation down — hundreds of funders to go?