- Revenue 2024
- $5,086,460
- Expenses 2024
- $2,426,063
Program services were 78.5% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.
As filed
- Subsection
- 03
- NTEE code
- C340
- Classification
- 1000
- Street
- PO BOX 917
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 · 2024
Mission
To protect and preserve the natural areas, open spaces and rural character of Ozaukee, Milwaukee and Washington Counties. Through conservation, education and outreach, the Organization will preserve the regions rich natural and rural heritage for the benefit of future generations.
-
Maintenance of nature preserves in Ozaukee, Washington and Milwaukee counties, Wisconsin.
Expenses $1,905,129 · Revenue $70,891
As filed on the 2024 return.
Officers and directors · 2024
As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.
-
Thomas StolpTHOMAS STOLP
EXECUTIVE DIRECTOR
- Total calculated
- $133,768
- From this org
- $128,525
- From related orgs
- $0
- Other
- $5,243
- Hours/week
- 40
-
Rick FoxRICK FOX
PRESIDENT
- Total calculated
- $0
- Hours/week
- 3
-
Laurie ParsonsLAURIE PARSONS
VICE PRESIDENT
- Total calculated
- $0
- Hours/week
- 3
-
Lilith FowlerLILITH FOWLER
TREASURER
- Total calculated
- $0
- Hours/week
- 3
-
Paige RadkePAIGE RADKE
SECRETARY
- Total calculated
- $0
- Hours/week
- 3
-
Jon BaileyJON BAILEY
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Damiem DebuhrDAMIEM DEBUHR
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Robert DriesROBERT DRIES
DIRECTOR
- Total calculated
- $0
- Hours/week
- 2
-
Cory GritzmacherCORY GRITZMACHER
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Matt HaasMATT HAAS
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Kathy HudsonKATHY HUDSON
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Chris JaekelsCHRIS JAEKELS
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Danitra JonesDANITRA JONES
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Alec LothertALEC LOTHERT
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Jennifer MacKinnonJENNIFER MACKINNON
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
James PittelkowJAMES PITTELKOW
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Judy RupnowJUDY RUPNOW
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Brett VuykBRETT VUYK
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Tony YoungTONY YOUNG
DIRECTOR
- Total calculated
- $0
- Hours/week
- 1
-
Ryan PetersenRYAN PETERSEN
ROTATED OFF BOARD IN 2025
- Total calculated
- $0
- Hours/week
- 1
-
Joanne KlineJOANNE KLINE
ROTATED OFF BOARD IN 2025
- Total calculated
- $0
- Hours/week
- 1
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
-
2024
- Revenue
- $5,086,460
- Expenses
- $2,426,063
- Contributions
- $4,748,757
- Grants paid
- $0
-
2023
- Revenue
- $1,172,143
- Expenses
- $1,209,938
- Contributions
- $1,101,281
- Grants paid
- $0
-
2022
- Revenue
- $1,856,668
- Expenses
- $3,749,209
- Contributions
- $1,800,413
- Grants paid
- $0
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
- Revenue
- $5,053,891
- Expenses
- $1,088,083
- Assets (EOY)
- $22,989,724
-
2020 · 990
- Revenue
- $1,157,277
- Expenses
- $880,785
- Assets (EOY)
- $19,518,505
-
2019 · 990
- Revenue
- $2,009,354
- Expenses
- $883,850
- Assets (EOY)
- $19,105,078
-
2018 · 990
- Revenue
- $2,094,800
- Expenses
- $1,170,807
- Assets (EOY)
- $17,864,106
-
2017 · 990
- Revenue
- $3,098,339
- Expenses
- $1,227,835
- Assets (EOY)
- $17,901,466
-
2016 · 990
- Revenue
- $923,109
- Expenses
- $1,038,206
- Assets (EOY)
- $15,989,233
-
2015 · 990
- Revenue
- $1,103,193
- Expenses
- $882,720
- Assets (EOY)
- $16,198,244
-
2014 · 990
- Revenue
- $2,712,746
- Expenses
- $963,692
- Assets (EOY)
- $15,813,610
-
2013 · 990
- Revenue
- $911,296
- Expenses
- $868,843
- Assets (EOY)
- $14,006,160
-
2012 · 990
- Revenue
- not reported
- Expenses
- $749,646
- Assets (EOY)
- $13,986,489
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. Showing the 10 most recent; the API carries the rest.
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
-
GREATER MILWAUKEE FOUNDATION INC
$1,074,438
2022 SUSTAINING SUPPORT; PRESERVATION AND RESTORATION OF NATURE
-
$173,707
2024 ENVIRONMENTAL PROGRAMS
-
2022 WETLAND RESTORATION
-
$130,000
2024 CONSERVATION ACTIVITIES
-
2024 For grant recipient's exempt purposes
-
2023 For grant recipient's exempt purposes
-
2022 For grant recipient's exempt purposes
-
$52,983
2024 BUILDING AGROFORESTRY TO IMPROVE WATER QUALITY
-
DONOR ADVISED CHARITABLE GIVING
$44,750
2024 ENVIRONMENTAL AND ANIMALS
-
DONOR ADVISED CHARITABLE GIVING
$43,800
2022 ENVIRONMENTAL AND ANIMALS
The 10 largest by cash amount. The API serves every itemized grant.
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 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.