Wisconsin · Nonprofit
GORDON BUBOLZ NATURE PRESERVE INC
GORDON BUBOLZ NATURE PRESERVE INC (Wisconsin) receives grants from 18 organizations whose IRS filings report $1,160,096 to it, the largest being COMMUNITY FOUNDATION FOR THE FOX VALLEY REGION INC ($703,697). 10 of them have funded it in more than one year, and 66% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $1.7M
- Funders on record
- 18
- Grants received
- $1.2M
- Net assets
- $6.5M
What Gordon Bubolz Nature Preserve Inc does
Mission
To serve as a gathering place for the community to become inspired by, appreciate and enjoy nature through educational programming and recreational opportunities, while fostering a healthy environment and providing an improved quality of life.
As stated on its FY2025 Form 990.
Program
Educational workshops and programs were offered to over 100 schools and many individuals throughout the year.
$495,357 spent$106,239 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $495,357.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2017 to 2018, from $1.8M to $6.1M (+243%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2021 13% · 2022 8%. Grants only. Government contracts and fees sit inside program revenue.
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 2 of the last 9 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Board chair
Jesse Ostrom
Chair
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base narrowed from 7 funders to 4 funders, grant income fell $57k → $40k.
6 of 18 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 66% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of GORDON BUBOLZ NATURE PRESERVE INC’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
GORDON BUBOLZ NATURE PRESERVE INC leans on a few funders — its largest provides 61% of grant income and the top three 79%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
92% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund GORDON BUBOLZ NATURE PRESERVE INC.
Largest funder’s share by year: 2017 34% · 2018 59% · 2019 86% · 2020 60% · 2021 73% · 2022 40% · 2023 84% — growing more concentrated.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How long its funders stay
43% of GORDON BUBOLZ NATURE PRESERVE INC's funders are still giving 3 years after their first grant; 56% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
66% of GORDON BUBOLZ NATURE PRESERVE INC's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $390k that is directly attributable, 88% of it comes from Wisconsin funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $770k arriving through sponsors registered in 6 states is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Organizations like GORDON BUBOLZ NATURE PRESERVE INC
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Wisconsin
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
52% of spending goes to programs.
Governance
Public support
49%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for GORDON BUBOLZ NATURE PRESERVE INC: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds GORDON BUBOLZ NATURE PRESERVE INC?
- GORDON BUBOLZ NATURE PRESERVE INC (Wisconsin) receives grants from 18 organizations whose IRS filings report $1,160,096 to it, the largest being COMMUNITY FOUNDATION FOR THE FOX VALLEY REGION INC ($703,697). 10 of them have funded it in more than one year, and 66% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does GORDON BUBOLZ NATURE PRESERVE INC have?
- IRS filings report 18 organizations giving $1,160,096 in grants to GORDON BUBOLZ NATURE PRESERVE INC, 10 of which have funded it in more than one year.
- Who is the largest funder of GORDON BUBOLZ NATURE PRESERVE INC?
- COMMUNITY FOUNDATION FOR THE FOX VALLEY REGION INC is the largest funder on record, with $703,697 in grants. The full list of funders is on this page.
- How can an organization like GORDON BUBOLZ NATURE PRESERVE INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Wisconsin. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Gordon Bubolz Nature Preserve →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), and the filings of 18 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing