Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 11-3734236

PLANKINTON PRESERVATION SOCIETY INC

Tax-exempt · PLANKINTON, SD 57368

Financials

$9K$11K2023$22K$3K2024$33K$24K2025
Revenue Expenses · by fiscal year end
Financials of PLANKINTON PRESERVATION SOCIETY INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-EZ$32,640$24,399$8,241$177,998$0$177,998
December 31, 2024990-EZ (amended)$22,056$3,157$18,899$169,757$0$169,757
December 31, 2023990-EZ$8,727$11,264-$2,537$150,858$0$150,858
Financial details: 990-EZ for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$32,525
Investment income
$115

Expenses

Compensation of officers, directors and key employees
$0
Professional fees and payments to contractors
$159
Occupancy
$20,911
Other expenses
$3,329
Program services (functional)
$23,399

Balance sheet and other

Total assets, start of year
$169,757
Total assets, end of year
$177,998
Total liabilities, end of year
$0
Net assets, end of year
$177,998
Cash, savings and investments
$39,587
Land and buildings
$123,411
Gross receipts
$32,640

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, 2025, highest compensation first.

NameTitleHours / weekCompensation
Gayle Van GenderenPRESIDENT0$0
Jack MaretteVICE PRESIDENT0$0
John Paul StudenySECRETARY0$0
Diana SpinarBOARD MEMBER0$0
Kathy GuindonTREASURER0$0
John SchmidtBOARD MEMBER0$0
Magdalena Popek-HurstBOARD MEMBER0$0
990-EZ for the year ended December 31, 2024: 8 people
NameTitleHours / weekCompensation
Gayle Van GenderenDirector0$0
Jack MaretteDirector0$0
Rosalie BrinkDirector0$0
John Paul StudenyDirector0$0
Diana SpinarDirector0$0
Kathy GuindonDirector0$0
John SchmidtDirector0$0
Magdalena Popek-HurstDirector0$0
990-EZ for the year ended December 31, 2023: 8 people
NameTitleHours / weekCompensation
Gayle Van GenderenDirector0$0
Jack MaretteDirector0$0
Rosalie BrinkDirector0$0
John Paul StudenyDirector0$0
Diana SpinarDirector0$0
Kathy GuindonDirector0$0
John SchmidtDirector0$0
Magdalena Popek-HurstDirector0$0

Address and contacts

Address (IRS master file)
PO BOX 101, PLANKINTON, SD 57368-0101
In care of
% KATHY GUINDON
Signed the 990-EZ
KATHY GUINDON, TREASURER
Phone
(605) 942-7921
Return prepared by
Mairose and Steele Prof LLC

Mission

Operation of a public museum

990-EZ for the year ended December 31, 2025

Program accomplishments

  • Operates an historical museum.
    Expenses $23,399 · grants $10,000

What it must file and when

IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. 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, 2026990-EZ on file
2024December 31, 2024May 15, 2025990-EZ on file
2023December 31, 2023May 15, 2024990-EZ on file

File the 2026 990-N for PLANKINTON PRESERVATION SOCIETY INC

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
11-3734236
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2005
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Assets (IRS master file)
$177,998
Income (IRS master file)
$32,640

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-EZDecember 2025$32,640$24,399$177,998XML
990-EZDecember 2024$7,056$3,157$154,757XML
990-EZDecember 2023$8,727$11,264$150,858XML
990-EZDecember 2022–––IRS
990-EZDecember 2021–––IRS

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 11-3734236).

Questions about PLANKINTON PRESERVATION SOCIETY INC

What is the EIN of PLANKINTON PRESERVATION SOCIETY INC?
The employer identification number (EIN) of PLANKINTON PRESERVATION SOCIETY INC is 11-3734236.
Is PLANKINTON PRESERVATION SOCIETY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2005.
Are donations to PLANKINTON PRESERVATION SOCIETY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does PLANKINTON PRESERVATION SOCIETY INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of PLANKINTON PRESERVATION SOCIETY INC due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did PLANKINTON PRESERVATION SOCIETY INC last file with the IRS?
The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
Who are the officers and directors of PLANKINTON PRESERVATION SOCIETY INC?
The 990-EZ for the year ended December 31, 2025 lists 7 people; 0 received compensation from the organization.
How much revenue does PLANKINTON PRESERVATION SOCIETY INC have?
On its 990-EZ for the year ended December 31, 2025 it reported revenue of $32,640, expenses of $24,399 and total assets of $177,998 at year end.

Other nonprofits in PLANKINTON

All nonprofits in PLANKINTON · South Dakota · Arts, culture and humanities