Illinois · Nonprofit
WILLIAM BUTTERWORTH FOUNDATION
WILLIAM BUTTERWORTH FOUNDATION (Illinois) receives grants from 11 organizations whose IRS filings report $791,750 to it, the largest being ALLEN FAMILY FOUNDATION ($500,000). 4 of them have funded it in more than one year.
Against its field
WILLIAM BUTTERWORTH FOUNDATION holds deeper cash reserves than three-quarters of the 11,253 human services nonprofits its size.
this organization peer median middle 50% of peers· 11,253 human services nonprofits $1M–$10M, FY2024
Three funders worth looking at
Grantmakers with no record of funding this organization, ranked by how strongly the co-funder graph and the mission embeddings agree. The evidence is in section 03.
- United Way Quad Citiesshared funderslocal
- Prime Coalition Incportfolio match
- Craig and Connie Thatcher Foundationportfolio match
The organization over time
Each line starts at 100 in 2019, so what you read is the shape rather than the size: 150 means half as much again as 2019, 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.
Who funds it, year by year
2018 → 2023: the base broadened from 2 funders to 8 funders, grant income rose $3k → $157k.
4 of 11 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 14% 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 BUTTERWORTH 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 BUTTERWORTH FOUNDATION leans on a few funders — its largest provides 63% of grant income and the top three 85%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
27% 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 BUTTERWORTH FOUNDATION.
Largest funder’s share by year: 2018 80% · 2019 81% · 2020 89% · 2021 89% · 2022 97% · 2023 25% — 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.
How long its funders stay
50% of WILLIAM BUTTERWORTH FOUNDATION's funders are still giving 1 year after their first grant; 36% 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
WILLIAM BUTTERWORTH FOUNDATION draws 73% 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. $108k arriving through sponsors registered in 3 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.
Funders to approach
Grantmakers that don’t fund you yet, surfaced two ways: they back organizations that share your funders, or their grantees resemble your mission. The ones both signals agree on come first. Your 11 funders put you typical among the 400 organizations that share them.
- United Way Quad Citiesshared funderslocalIA · backs 80 organizations that share your funders · funds 48 organizations near you
- Prime Coalition Incportfolio matchits grantees resemble your mission
- Craig and Connie Thatcher Foundationportfolio matchits grantees resemble your mission
- Ralph & Elizabeth Anderson Charitable Foundationportfolio matchits grantees resemble your mission
- Elton Family Foundationportfolio matchits grantees resemble your mission
- Gardinor-Prunaret Foundationportfolio matchits grantees resemble your mission
- Bethel Woods Center for the Arts Incportfolio matchits grantees resemble your mission
- Rmw Foundationportfolio matchits grantees resemble your mission
- Harbaugh George & Betty Charitable Foundationportfolio matchits grantees resemble your mission
- Bernice and Milton Stern Foundationportfolio matchits grantees resemble your mission
- Mary Elizabeth Pearce Foundation Trportfolio matchits grantees resemble your mission
- Michael Klein Foundationportfolio matchits grantees resemble your mission
From the co-funder graph (funders backing at least two comparable organizations, shrunk for grantee count, donor-advised and mega-funds excluded) and the universe embeddings. A research starting point; overlap is association, not a guarantee of fit.
Organizations like WILLIAM BUTTERWORTH FOUNDATION
Nonprofits whose mission and program text most resemble this one, by semantic similarity over the universe of 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.
Screen this organization
A dated, signed PDF of the compliance screen for WILLIAM BUTTERWORTH 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. How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds WILLIAM BUTTERWORTH FOUNDATION?
- WILLIAM BUTTERWORTH FOUNDATION (Illinois) receives grants from 11 organizations whose IRS filings report $791,750 to it, the largest being ALLEN FAMILY FOUNDATION ($500,000). 4 of them have funded it in more than one year.
- How many funders does WILLIAM BUTTERWORTH FOUNDATION have?
- IRS filings report 11 organizations giving $791,750 in grants to WILLIAM BUTTERWORTH FOUNDATION, 4 of which have funded it in more than one year.
- Who is the largest funder of WILLIAM BUTTERWORTH FOUNDATION?
- ALLEN FAMILY FOUNDATION is the largest funder on record, with $500,000 in grants. The full list of funders is on this page.
- How can an organization like WILLIAM BUTTERWORTH FOUNDATION 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.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2019–2024), and the filings of 11funders 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 August 27, 2026. What this page cannot tell you · view filing