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FRIENDS OF JONATHAN CLARK HOUSE LTD

EIN 46-0986057 MEQUON, WI

Revenue 2025
$123,496
Expenses 2025
$88,672

Program services were 95.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
A80
Classification
1000
Street
PO BOX 634

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2025

Mission

Collect, preserve and share the history of the Jonathan Clark House and the early settlers of Mequon and Thiensville.

  • House Restoration & Maintenance: Restore our listed building so that it appears much as it did when it was built in 1848. Meet the constant challenges of maintaining a structure that is more than 175 years old. Last year, over 200 visitors went through the house.

    Expenses $65,503

  • Community Outreach: Provide historical and educational programs emphasizing experiences from the mid-19th century for the entire community, especially young people. Groups include students, scouting and 4-H. Typical annual participation is about 500.

    Expenses $18,705 · Grants $500

As filed on the 2025 return.

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Nicole Buerosse

    Secretary, Board Member, Assistant Director

    Total calculated
    $9,000
    From this org
    $9,000
    From related orgs
    $0
    Other
    $0
    Hours/week
    20

  • Shaw Bridges

    Treasurer, Board Member

    Total calculated
    $0
    Hours/week
    10

  • Thomas Daub

    President, Board Member

    Total calculated
    $0
    Hours/week
    2

  • Bill Kroyer

    Board Member

    Total calculated
    $0
    Hours/week
    1

  • Christopher Osborne

    Board Member

    Total calculated
    $0
    Hours/week
    1

  • Brady Seiberlich

    Board Member

    Total calculated
    $0
    Hours/week
    3

  • Randy Trumbull-Holper

    Board Member

    Total calculated
    $0
    Hours/week
    2

  • Kurt Zellmann

    Board Member

    Total calculated
    $0
    Hours/week
    1

  • Margaret Bussone

    Vice President

    Total calculated
    $0
    Hours/week
    5

  • Frederick Derr

    Preservation Manager

    Total calculated
    $0
    Hours/week
    25

  • Nina Look PhD

    Executive Director

    Total calculated
    $0
    Hours/week
    30

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2025
    Revenue
    $123,496
    Expenses
    $88,672
    Contributions
    $110,492
    Grants paid
    $500
  • 2024
    Revenue
    $66,042
    Expenses
    $32,298
    Contributions
    $57,358
    Grants paid
    $0
  • 2023
    Revenue
    $77,689
    Expenses
    $28,555
    Contributions
    $62,499
    Grants paid
    $0
  • 2023
    Revenue
    $77,689
    Expenses
    $28,555
    Contributions
    $74,354
    Grants paid
    $0
  • 2022
    Revenue
    $69,883
    Expenses
    $46,994
    Contributions
    not reported
    Grants paid
    not reported

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990-EZ

    Revenue
    $56,055
    Expenses
    $32,829
    Assets (EOY)
    $393,542

  • 2020 · 990-EZ

    Revenue
    $53,525
    Expenses
    $19,799
    Assets (EOY)
    $378,677

  • 2019 · 990-EZ

    Revenue
    $63,899
    Expenses
    $17,128
    Assets (EOY)
    $352,914

  • 2018 · 990-EZ

    Revenue
    $53,987
    Expenses
    $23,011
    Assets (EOY)
    $314,335

  • 2018 · 990-EZ

    Revenue
    $53,987
    Expenses
    $23,011
    Assets (EOY)
    $314,335

  • 2017 · 990-EZ

    Revenue
    $30,057
    Expenses
    $19,433
    Assets (EOY)
    $290,579

  • 2016 · 990-EZ

    Revenue
    $25,989
    Expenses
    $16,940
    Assets (EOY)
    $289,180

  • 2015 · 990-EZ

    Revenue
    $26,417
    Expenses
    $13,255
    Assets (EOY)
    $292,328

  • 2014 · 990-EZ

    Revenue
    $78,303
    Expenses
    $26,358
    Assets (EOY)
    $291,973

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Form 990-N e-Postcard, tax year 2013

Tax period
1 January 2013 to 31 December 2013
Principal officer
Cindy G Bock
Mailing address
PO Box 634Mequon WI 53097
Website
www.jonathanclarkhouse.org

As filed, from the IRS e-Postcard file of 26 October 2026. The IRS publishes only each organization's most recent postcard, so earlier years are not shown. A 990-N carries no financial detail. The postcard also gives the principal officer's address, which is not shown here.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 26 October 2026, for every organization at once. Returns through tax year 2025, the newest we have parsed for this organization.