Michigan · Nonprofit
GRASS LAKE SANCTUARY
GRASS LAKE SANCTUARY (Michigan) receives grants from 5 organizations whose IRS filings report $125,639 to it, the largest being HARRY A AND MARGARET D TOWSLEY FOUNDATION ($50,000). 3 of them have funded it in more than one year.
Against its field
GRASS LAKE SANCTUARY's revenue fell 100% between 2017 and 2023.
this organization peer median middle 50% of peers· 9,981 religion nonprofits under $100k, FY2023
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.
- Duffy Foundationshared funderslocal
- Wet Mtn Valley Community Foundationportfolio match
- Edward and June Kellogg Foundation Dba Kellogg Family Foundationportfolio match
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.
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 GRASS LAKE SANCTUARY’s revenue is contributions — more reliant on donations than three-quarters of its peers (100% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 7 reported years ran a deficit.
reserve
Who funds it, year by year
2017 → 2023: the base narrowed from 3 funders to 1 funder, grant income fell $45k → $19.
1 of 5 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 0% 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 GRASS LAKE SANCTUARY’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
GRASS LAKE SANCTUARY leans on a few funders — its largest provides 40% of grant income and the top three 84%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
Largest funder’s share by year: 2017 56% · 2018 100% · 2019 77% · 2020 97% · 2021 99% · 2022 100% · 2023 100% — 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.
Where its funders are
100% of GRASS LAKE SANCTUARY's grant income comes from Michigan funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $239 arriving through sponsors registered in 1 stateis 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 5 funders put you under-funded among the 330 organizations that share them.
- Duffy Foundationshared funderslocalMI · backs 31 organizations that share your funders · funds 39 organizations near you
- Wet Mtn Valley Community Foundationportfolio matchits grantees resemble your mission
- Edward and June Kellogg Foundation Dba Kellogg Family Foundationportfolio matchits grantees resemble your mission
- Donald and Ruby Branson Foundationportfolio matchits grantees resemble your mission
- The Klick Foundationportfolio matchits grantees resemble your mission
- Hallberg Family Foundationportfolio matchits grantees resemble your mission
- The Mignon Sherwood Delano Fundportfolio matchits grantees resemble your mission
- Great Lakes Energy People Fundportfolio matchits grantees resemble your mission
- The Helen and Jose Colton Foundationportfolio matchits grantees resemble your mission
- Lavoie Foundationportfolio matchits grantees resemble your mission
- Park County Community Foundationportfolio matchits grantees resemble your mission
- Alliance for Green Heatportfolio 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 GRASS LAKE SANCTUARY
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 Michigan
Nationally
Read directly from this organization’s own Form 990, as neutral context.
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 GRASS LAKE SANCTUARY: 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 GRASS LAKE SANCTUARY?
- GRASS LAKE SANCTUARY (Michigan) receives grants from 5 organizations whose IRS filings report $125,639 to it, the largest being HARRY A AND MARGARET D TOWSLEY FOUNDATION ($50,000). 3 of them have funded it in more than one year.
- How many funders does GRASS LAKE SANCTUARY have?
- IRS filings report 5 organizations giving $125,639 in grants to GRASS LAKE SANCTUARY, 3 of which have funded it in more than one year.
- Who is the largest funder of GRASS LAKE SANCTUARY?
- HARRY A AND MARGARET D TOWSLEY FOUNDATION is the largest funder on record, with $50,000 in grants. The full list of funders is on this page.
- How can an organization like GRASS LAKE SANCTUARY find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Michigan. 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 FY2023 (financials across 2017–2023), and the filings of 5funders 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