Treeline Foundation
Treeline Foundation is a private foundation based in Seattle, Washington. Its 2024 filing reports 44 grants totaling $1,124,999, supporting organizations whose work includes climate change, trails and public lands, abortion access, and community services.
Treeline Foundation at a glance
In short: Treeline Foundation gave $1.1M across 44 grants in 2024 (avg $26K), mostly in Washington. 7% of 2024 grantees were new. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $1,124,999
- -6.8% vs 2023
- Grants made (2024)
- 44
- -2.2% vs 2023
- Average grant
- $25,568
- -4.7% vs 2023
- Median grant
- $20,000
- Total assets
- $750,377
- -7.3% vs 2023
- New grantees (estimate)
- 7% first-time grantees (3 of 44, 2024)
- Primary geography
- Washington (69% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Treeline Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: PO Box 51250, Seattle, WA 98115
Phone: (206) 626-6000
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Treeline Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2024
The largest 2024 recipient was YMCA of Greater Seattle ($110K). Together the top 10 received $650K.
Grant Size Distribution
221 grants across all recorded years
The most common grant size was under $50K: 179 grants of 221 (81%).
Geographic Focus
Where this funder awards grants
In 2024, 69% of grant dollars went to recipients in Washington, 11% to California, 7% to Massachusetts, 7% to Oregon, and 3% to New York.
Grant Distribution by State
Share of 2024 grant dollars across all 44 itemized grants.
States
Cities
Is Treeline Foundation open to new grantees?
7%
first-time grantees, 2024
In 2024, 3 of 44 grantees (7%) were first-time recipients. First grants averaged $11K; repeat grants $27K. How we count
Medians: $10K first-time, $20K repeat.
- 91% of 2024 grantees were also funded in 2023. Method
- Giving fell 25% from 2021 to 2024. Method
- In 2024 it paid out well above its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2019–2024). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2024, annual grant giving ranged from $1.1M (2024) to $1.8M (2020). In 2024 it made 44 grants totaling $1.1M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| YMCA of Greater Seattle Seattle, WA | To provide general operating support and support of the social impact center | $110,000 |
| Sightline Institute Seattle, WA | To Support Efforts to Address Climate Change | $100,000 |
| Washington Trails Association Seattle, WA | General operating support, with special interest in olt program | $100,000 |
| 350ORG Boston, MA | To Provide General Operating Support | $75,000 |
| The Sierra Club Foundation Oakland, CA | To Support of the Outdoors for All Program | $75,000 |
| Northwest Abortion Access Fund Portland, OR | To Provide General Operating Support | $65,000 |
| Forterra Seattle, WA | To Provide General Operating Support | $50,000 |
| Benefits Law Center Seattle, WA | To Provide General Operating Support | $25,000 |
| Earthgen Seattle, WA | To Provide General Operating Support | $25,000 |
| Fresh Tracks Washington, DC | To Provide General Operating Support | $25,000 |
Ready to take the next step with Treeline Foundation?
Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2024 | $750,377 | $1,118,563 | $1,177,607 | $1,124,999 | 44 | $1,169,087 | $28,093 | $41,515 |
| 2023 | $809,421 | $1,120,649 | $1,229,206 | $1,206,999 | 45 | $1,223,092 | $32,585 | $46,818 |
| 2022 | $917,978 | $1,093,356 | $1,306,356 | $1,282,000 | 47 | $1,298,571 | $3,621 | $60,507 |
| 2021 | $1,130,978 | $1,578,011 | $1,577,012 | $1,507,000 | 40 | $1,569,527 | $423,253 | $43,396 |
| 2020 | $1,130,040 | $2,395,740 | $1,820,945 | $1,775,000 | 45 | — | $247,905 | $45,304 |
| 2019 | $555,465 | $1,148,032 | $1,517,165 | $1,471,000 | 44 | — | $49,227 | $34,300 |
Under IRS private-foundation payout rules, Treeline Foundation reported a distributable amount of $42K for 2024 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No formal mission statement is provided in the available information. The 2024 grants show support for organizations working across several areas. For example, Sightline Institute describes its mission as making the Cascadia bioregion a model of sustainability, and 350.org says it works on campaigns and public engagement to address the climate crisis. Washington Trails Association says it mobilizes people to explore and steward trails and public lands; Northwest Abortion Access Fund says it funds abortions and works to break down barriers to abortion access in the Northwest.
Other 2024 grantees describe work in education, legal advocacy, and parks and conservation. EarthGen says it supports youth and school communities to become leaders for a healthy environment, while Benefits Law Center describes providing legal advocacy to people with disabilities. The Trust for Public Land says it creates parks and protects land for people.
Grantmaking
In 2024, Treeline Foundation made 44 grants totaling $1,124,999. Grant amounts ranged from $3,333 to $110,000, with a median grant of $20,000. The largest reported grants included $110,000 to YMCA of Greater Seattle for general operating support and its Social Impact Center; $100,000 each to Sightline Institute for efforts to address climate change and Washington Trails Association for general operating support, with special interest in its OLT program; and $75,000 each to 350.org for general operating support and The Sierra Club Foundation for its Outdoors for All program.
Other reported grants included $65,000 to Northwest Abortion Access Fund for general operating support and $50,000 to Forterra for general operating support. EarthGen and Benefits Law Center each received $25,000. Treeline’s total grantmaking was $1,206,999 across 45 grants in 2023 and $1,282,000 across 47 grants in 2022.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2024 filing lists Sarah Merner and Craig McKibben as directors/officers. It also lists Andrew McKibben, Jasmine Gervais, Margaret McKibben, Leslie Merner Duke, John Gould, Carol Driver, and Tyler Butterworth as directors.
Treeline Foundation's 2024 filing lists 9 officers; none of the 9 officers listed in 2024 report compensation.
Officers on the 2024 filing
Andrew McKibben
Director
On filings since 2019
4 hrs/week
$13K (2019) → $0 (2024)
Carol Driver
Director
On filings since 2019
4 hrs/week
No compensation reported
Craig McKibben
Director & Officer
On filings since 2019
4 hrs/week
No compensation reported
Jasmine Gervais
Director
On filings since 2019
4 hrs/week
No compensation reported
John Gould
Director
On filings since 2019
4 hrs/week
No compensation reported
Leslie Merner Duke
Director
On filings since 2019
4 hrs/week
No compensation reported
Margaret McKibben
Director
On filings since 2019
4 hrs/week
No compensation reported
Sarah Merner
Director & Officer
On filings since 2019
4 hrs/week
No compensation reported
Tyler Butterworth
Director
On filings since 2019
4 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2019–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2020 IRS filing
The highest reported compensation on the 2020 filing was $2K, to Andrew McKibben (Director).
Frequently asked questions about Treeline Foundation
How much does Treeline Foundation give each year?
Treeline Foundation gave $1.1M across 44 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $1.2M across 45 grants.
What is Treeline Foundation's typical grant size?
Treeline Foundation's median grant in 2024 was $20,000, and its average grant was $25,568, across 44 grants on its 2024 IRS Form 990-PF. Organizations receiving their first grant from Treeline Foundation that year got $11K on average.
Where does Treeline Foundation give grants?
Treeline Foundation gives mostly in Washington: 69% of the grant dollars itemized on its 2024 IRS Form 990-PF went to recipients there. The next largest states were California (11%) and Massachusetts (7%). The most frequent recipient cities were Seattle, WA (29 grants), Portland, OR (2 grants), Los Angeles, CA (2 grants) and New York, NY (2 grants).
Does Treeline Foundation give general operating support?
Yes: 75% of Treeline Foundation's 2024 grants with a stated purpose (33 of 44) were for general or operating support, per its 2024 IRS Form 990-PF.
Who are Treeline Foundation's largest grantees?
Treeline Foundation's largest 2024 grantees include YMCA of Greater Seattle ($110,000), Sightline Institute ($100,000) and Washington Trails Association ($100,000), according to its 2024 IRS Form 990-PF. Together they received 28% of its itemized 2024 grant dollars.
How large is Treeline Foundation?
Treeline Foundation reported $750K in total assets on its 2024 IRS Form 990-PF. It paid out $1.2M in qualifying distributions that year, against a required minimum of $42K (roughly 5% of its investment assets).
What does Treeline Foundation fund?
No formal mission statement is provided in the available information. The 2024 grants show support for organizations working across several areas. See mission & focus areas ↑
How do I apply for a grant from Treeline Foundation?
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Treeline Foundation's EIN?
Treeline Foundation's EIN (Employer Identification Number) is 46-2216403. IRS Form 990 filing data is available on this page for 2019–2024.
Does Treeline Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS September 8, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS August 18, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS July 6, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS November 15, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS November 1, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS November 5, 2025)
- IRS filings on file for fiscal years 2019–2024
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Cite this profile
Grantable. (2026). Treeline Foundation funder profile. GrantGraph. Retrieved October 12, 2026, from https://grantable.co/funders/treeline-foundation-morg_344cc55c6e574086908acf8a4dea5584
BibTeX
@misc{grantable_462216403_2026,
author = {{Grantable}},
title = {{Treeline Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/treeline-foundation-morg_344cc55c6e574086908acf8a4dea5584},
note = {Accessed 2026-10-12. Data licensed CC BY 4.0}
}The figures on this page are open data under CC BY 4.0: reuse them with credit to Grantable and a link. Download the data.
Figures come from Treeline Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
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