Illinois · Nonprofit
WATERLOO MUSEUM SOCIETY
WATERLOO MUSEUM SOCIETY (Illinois) receives grants from 2 organizations whose IRS filings report $5,025 to it, the largest being WILLIAM ZIMMER FMLY FOUNDATION 480003001 ($5,000). 0 of them have funded it in more than one year.
- Revenue FY2025
- $30k
- Funders on record
- 2
- Grants received
- $5k
- Net assets
- $723k
What Waterloo Museum Society does
Mission
Display artifacts of local and american history and conduct educational presentations
As stated on its FY2025 Form 990.
Program
Display of artifacts and presentations on various historical events.
$21,508 spent$29,777 earned by the program100% of program spending
The program described on its FY2025 Form 990. Program spending in total: $21,508.
The organization over time
Each line starts at 100 in 2020, so what you read is the shape rather than the size: 150 means half as much again as 2020, 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 2022 to 2023, from $642k to $682k (+6%).
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.
66% of WATERLOO MUSEUM SOCIETY’s revenue is contributions — about as donation-reliant as the typical peer (78% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 2 of the last 6 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.
Who funds it, year by year
2018 → 2021: the base held at 1 funder, grant income rose $25 → $5k.
From the IRS filings of WATERLOO MUSEUM SOCIETY’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
WATERLOO MUSEUM SOCIETY leans on a few funders — its largest provides 100% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
Largest funder’s share by year: 2018 100% · 2021 100% — broadly stable.
“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
WATERLOO MUSEUM SOCIETY draws 100% of its grant income from funders outside Illinois, across 2 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. 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
WATERLOO MUSEUM SOCIETY runs a healthier operating margin than three-quarters of the 10,713 arts & culture nonprofits its size.
this organization peer median middle 50% of peers· 10,713 arts & culture nonprofits under $100k, FY2025
Organizations like WATERLOO MUSEUM SOCIETY
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 Illinois
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
100% of spending goes to programs.
Governance
Public support
79%
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 WATERLOO MUSEUM SOCIETY: 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 WATERLOO MUSEUM SOCIETY?
- WATERLOO MUSEUM SOCIETY (Illinois) receives grants from 2 organizations whose IRS filings report $5,025 to it, the largest being WILLIAM ZIMMER FMLY FOUNDATION 480003001 ($5,000). 0 of them have funded it in more than one year.
- How many funders does WATERLOO MUSEUM SOCIETY have?
- IRS filings report 2 organizations giving $5,025 in grants to WATERLOO MUSEUM SOCIETY.
- Who is the largest funder of WATERLOO MUSEUM SOCIETY?
- WILLIAM ZIMMER FMLY FOUNDATION 480003001 is the largest funder on record, with $5,000 in grants. The full list of funders is on this page.
- How can an organization like WATERLOO MUSEUM SOCIETY find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Illinois. 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 Waterloo Museum Society →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2020–2025), and the filings of 2 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 22, 2026. What this page cannot tell you · view filing