Iowa · Nonprofit
WILLIAM G STOWE FOUNDATION
WILLIAM G STOWE FOUNDATION (Iowa) receives grants from 4 organizations whose IRS filings report $220,834 to it, the largest being COMMUNITY FDN OF GREATER DES MOINES F/K/A GREATER DES MOINES COMMUNITY FDN ($160,000). 1 of them have funded it in more than one year, and 84% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $618k
- Funders on record
- 4
- Grants received
- $221k
- Net assets
- $810k
What William G Stowe Foundation does
Mission
To further water and environmental education through outdoor classrooms and other means of providing information.
As stated on its FY2025 Form 990.
Program
Outdoor classrooms provide a forum for discussion and information dissemination about water and environmental issues facing iowa.
The program described on its FY2025 Form 990.
The organization over time
Each line starts at 100 in 2022, so what you read is the shape rather than the size: 150 means half as much again as 2022, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2024 to 2025, from $192k to $810k (+322%).
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.
100% of WILLIAM G STOWE FOUNDATION’s revenue is contributions — more reliant on donations than three-quarters of its peers (88% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 4 reported years ran a deficit.
reserve
Who funds it, year by year
2022 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $60k → $103k.
2 of 4 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 84% 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 WILLIAM G STOWE FOUNDATION’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
WILLIAM G STOWE FOUNDATION leans on a few funders — its largest provides 72% of grant income and the top three 99%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
84% 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 WILLIAM G STOWE FOUNDATION.
Largest funder’s share by year: 2022 100% · 2023 98% — diversifying over time.
“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.
Where its funders are
84% of WILLIAM G STOWE FOUNDATION'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 $36k that is directly attributable, 100% of it comes from Iowa funders.
Funder states come from each funder’s own filing. $185k arriving through sponsors registered in 2 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.
Against its field
WILLIAM G STOWE FOUNDATION has grown faster than three-quarters of the 2,433 environment nonprofits its size.
this organization peer median middle 50% of peers· 2,433 environment nonprofits $100k–$1M, FY2025
Organizations like WILLIAM G STOWE FOUNDATION
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 Iowa
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
0% of spending goes to programs.
Governance
Public support
100%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Screen this organization
A dated, signed PDF of the compliance screen for WILLIAM G STOWE FOUNDATION: 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 WILLIAM G STOWE FOUNDATION?
- WILLIAM G STOWE FOUNDATION (Iowa) receives grants from 4 organizations whose IRS filings report $220,834 to it, the largest being COMMUNITY FDN OF GREATER DES MOINES F/K/A GREATER DES MOINES COMMUNITY FDN ($160,000). 1 of them have funded it in more than one year, and 84% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does WILLIAM G STOWE FOUNDATION have?
- IRS filings report 4 organizations giving $220,834 in grants to WILLIAM G STOWE FOUNDATION, 1 of which have funded it in more than one year.
- Who is the largest funder of WILLIAM G STOWE FOUNDATION?
- COMMUNITY FDN OF GREATER DES MOINES F/K/A GREATER DES MOINES COMMUNITY FDN is the largest funder on record, with $160,000 in grants. The full list of funders is on this page.
- How can an organization like WILLIAM G STOWE FOUNDATION find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Iowa. 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 William G Stowe →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2022–2025), and the filings of 4 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