Illinois · Nonprofit
Tallgrass Sudbury School
Tallgrass Sudbury School (Illinois) receives grants from 2 organizations whose IRS filings report $12,589 to it, the largest being Niemann Family Foundation ($12,000). 2 of them have funded it in more than one year.
- Revenue FY2025
- $184k
- Funders on record
- 2
- Grants received
- $13k
- Net assets
- $92k
What Tallgrass Sudbury School does
Mission
Education for approximately 35 children of various ages
As stated on its FY2025 Form 990-EZ.
Programs
The school produced a full-length play with 10-12 students which benefited the entire community
$400 spent36% of program spendingThe school organized a fund-raiser at a bowling alley; the students had to ask for donations. The funds were used for supplies the students requested for various activities
$700 spent64% of program spendingThe school organized a talent show to showcase the individual skills of many of the students; approximately 10 students participated and the rest were in the audience with other family members.
$0 spent0% of program spending
The 3 programs described on its FY2024 Form 990-EZ. Program spending in total: $1,100.
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. 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 2023 to 2024, from $96k to $89k (−8%).
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.
7% of Tallgrass Sudbury School’s revenue is contributions — more earned-revenue than three-quarters of its peers (57% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 3 of the last 6 reported years ran a deficit.
Who funds it, year by year
2020 → 2023: the base held at 1 funder, grant income rose $123 → $131.
1 of 2 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 5% 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 Tallgrass Sudbury School’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
Tallgrass Sudbury School leans on a few funders — its largest provides 95% 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: 2020 100% · 2021 100% · 2022 98% · 2023 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
100% of Tallgrass Sudbury School's grant income comes from Illinois funders.
Funder states come from each funder’s own filing. $589 arriving through sponsors registered in 1 state 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
Tallgrass Sudbury School has grown faster than half of the 16,849 education nonprofits its size.
this organization peer median middle 50% of peers· 16,849 education nonprofits $100k–$1M, FY2025
Organizations like Tallgrass Sudbury School
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.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for Tallgrass Sudbury School: 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 Tallgrass Sudbury School?
- Tallgrass Sudbury School (Illinois) receives grants from 2 organizations whose IRS filings report $12,589 to it, the largest being Niemann Family Foundation ($12,000). 2 of them have funded it in more than one year.
- How many funders does Tallgrass Sudbury School have?
- IRS filings report 2 organizations giving $12,589 in grants to Tallgrass Sudbury School, 2 of which have funded it in more than one year.
- Who is the largest funder of Tallgrass Sudbury School?
- Niemann Family Foundation is the largest funder on record, with $12,000 in grants. The full list of funders is on this page.
- How can an organization like Tallgrass Sudbury School 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 Tallgrass Sudbury School →
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 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 14, 2026. What this page cannot tell you · view filing