Mission
Education and diffusion of knowledge regarding oaks
Small Public Charity
INTERNATIONAL OAK SOCIETY
INTERNATIONAL OAK SOCIETY, of Mercer Island, WA, is a Small Public Charity tracked in Imperigo's IRS 990 database. The 2024 filing shows $152K in revenue, $36K in expenses, $270K in total assets. 2 publicly reported grants to this organization, totaling roughly $79K, appear in IRS filings.
EIN: 371362228
Mercer Island, WA
Environment
NTEE: C
Latest filing: 2024
Total Revenue$152K
Total Expenses$36K
Total Assets$270K
Grant Records2
Funding Total$79K
Filing Years2022–2024
Where $100 goes at International Oak Society
How International Oak Society divides every $100 it spends, from its own Form 990-EZ filings, averaged across 3 years.
$96
Programs
the work itself
$4
Everything else
operations and overhead
Form 990-EZ reports program spending but doesn't separate management from fundraising, so those are shown together.
Inside the $96 for programs
$62
Publication of the annual journal International Oaks
$18
Tour of oak ecosystems in California North Carolina and South Carolina
$11
Oak Conservation and Research Fund | Explanation:| Oak Conservation and Research Fund: fundraising for grants that were then issued in 2025 2024 revenue was $121,761
Plus 1 more program. Cost per person served and the full program breakdown are on the full profile.
Source: Form 990-EZ filings with the IRS, latest fiscal year 2024. Shares are from the organization's reported expenses. Data by Imperigo; not affiliated with the IRS.
Sample Grants Received
For grant recipient's exempt purposes
$48,750
For grant recipient's exempt purposes
$30,000
Showing up to 5 of 2 total records — full history available with membership.
Officers & Directors
Director
Amy Byrne
Director and Editor International Oaks
Beatrice Chasse
Secretary and Director
Dan Kostka
Treasurer and Director
Dirk Giseburt
Director
Phillip Douglas
President and Director
Roderick Cameron
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2024 | $152K | $36K | $270K |
| 2023 | $100K | $72K | $154K |
| 2022 | $175K | $127K | $126K |
Between 2022 and 2024, reported annual revenue declined from $175K to $152K (-13%), with total assets most recently reported at $270K.
Interactive year-over-year charts and full filing details available with membership.