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Nonprofit · EIN 37-1362228

INTERNATIONAL OAK SOCIETY

Tax-exempt · MERCER ISLAND, WA 98040

Financials

$100K$72K2023$152K$36K2024
Revenue Expenses · by fiscal year end
Financials of INTERNATIONAL OAK SOCIETY by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2024990-EZ$151,663$35,977$115,686$269,552–$269,552
December 31, 2023990-EZ$99,798$71,907$27,891$153,866–$153,866
Financial details: 990-EZ for the year ended December 31, 2024

Revenue

Contributions, gifts and grants
$121,769
Membership dues
$24,422
Program service revenue
$5,100
Investment income
$138
Net income from sales of inventory
$234

Expenses

Compensation of officers, directors and key employees
$0
Printing, publications and postage
$21,380
Other expenses
$14,597
Program services (functional)
$32,387

Balance sheet and other

Total assets, start of year
$153,866
Total assets, end of year
$269,552
Total liabilities, end of year
–
Net assets, end of year
$269,552
Cash, savings and investments
$269,552
Gross receipts
$151,663

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990-EZ for the year ended December 31, 2024, highest compensation first.

NameTitleHours / weekCompensation
Roderick CameronPresident and Director5$0
Ryan RussellVice President and Director5$0
Dan KostkaSecretary and Director3$0
Dirk GiseburtTreasurer and Director9$0
Timothy BolandDirector2$0
Beatrice ChasseDirector and Editor International Oaks16$0
Phillip DouglasDirector1$0
Amy ByrneDirector3$0
990-EZ for the year ended December 31, 2023: 8 people
NameTitleHours / weekCompensation
Roderick CameronPresident and Director5$0
Ryan RussellVice President and Director5$0
Dan KostkaSecretary and Director3$0
Dirk GiseburtTreasurer and Director9$0
Timothy BolandDirector2$0
Beatrice ChasseDirector and Editor International Oaks16$0
Phillip DouglasDirector1$0
Amy ByrneDirector3$0

Address and contacts

Address (IRS master file)
2750 72ND AVE SE, MERCER ISLAND, WA 98040-2620
In care of
% DIRK GISEBURT
Mailing address (990-N for 2021)
12000 Boy Scout Trail, Petersburg IL 62675
Principal officer (990-N for 2021)
Dirk Giseburt, 2750 72nd Ave SE, Mercer Island WA 98040
Signed the 990-EZ
Dirk Giseburt, Treasurer

Mission

Education and diffusion of knowledge regarding oaks

990-EZ for the year ended December 31, 2024

Program accomplishments

  • Oak Conservation and Research Fund see Schedule O
    Expenses $3,582
  • Publication of the annual journal International Oaks
    Expenses $20,773
  • Tour of oak ecosystems in California North Carolina and South Carolina
    Expenses $6,165
  • Publication of the semi-annual newsletter distribution of email and maintenance of informative website
    Expenses $1,867

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026Not on file
2024December 31, 2024May 15, 2025990-EZ on file
2023December 31, 2023May 15, 2024990-EZ on file

File the 2025 990-EZ for INTERNATIONAL OAK SOCIETY

Due May 15, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
37-1362228
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1997
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Environment (C38P)
Assets (IRS master file)
$269,552
Income (IRS master file)
$151,663

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-EZDecember 2024$151,663$35,977$269,552XML
990-EZDecember 2023$99,798$71,907$153,866XML
990-EZDecember 2022–––IRS
990-N for 2021
Officer: Dirk Giseburt
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Shaun Haddock
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Shaun Haddock
December 31, 2019≤ $50,000 receipts––e-Postcard

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 37-1362228).

Questions about INTERNATIONAL OAK SOCIETY

What is the EIN of INTERNATIONAL OAK SOCIETY?
The employer identification number (EIN) of INTERNATIONAL OAK SOCIETY is 37-1362228.
Is INTERNATIONAL OAK SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1997.
Are donations to INTERNATIONAL OAK SOCIETY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INTERNATIONAL OAK SOCIETY file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of INTERNATIONAL OAK SOCIETY due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did INTERNATIONAL OAK SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990-EZ for the year ended December 2024.
Who is the principal officer of INTERNATIONAL OAK SOCIETY?
The 990-N for 2021 names Dirk Giseburt.
Who are the officers and directors of INTERNATIONAL OAK SOCIETY?
The 990-EZ for the year ended December 31, 2024 lists 8 people; 0 received compensation from the organization.
How much revenue does INTERNATIONAL OAK SOCIETY have?
On its 990-EZ for the year ended December 31, 2024 it reported revenue of $151,663, expenses of $35,977 and total assets of $269,552 at year end.

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