New York · Nonprofit
MIANUS RIVER GORGE INC
MIANUS RIVER GORGE INC (New York) receives grants from 54 organizations whose IRS filings report $3,500,674 to it, the largest being Brothers Brook Foundation ($1,165,160). 36 of them have funded it in more than one year.
Against its field
MIANUS RIVER GORGE INC runs a healthier operating margin than three-quarters of the 606 animals nonprofits its size.
this organization peer median middle 50% of peers· 606 animals nonprofits $1M–$10M, FY2025
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.
- Louis and Anne Abrons Foundation Incshared funders
- Johanette Wallerstein Institute 5607-00-43portfolio match
- Earthwatch Institute Incportfolio 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.
Government-grant reliance: 2019 3% · 2020 3% · 2021 6% · 2022 9% · 2023 5% · 2024 13% · 2025 3%. Grants only. Government contracts and fees sit inside program revenue.
95% of MIANUS RIVER GORGE INC’s revenue is contributions — more reliant on donations than three-quarters of its peers (74% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 9 reported years ran a deficit.
reserve
Who funds it, year by year
2017 → 2023: the base broadened from 8 funders to 25 funders, grant income rose $108k → $257k.
11 of 54 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 32% 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 MIANUS RIVER GORGE INC’s funders (the co-funder graph). Top 30 of 54 funders by total. 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
MIANUS RIVER GORGE INC has a broad base — no single funder exceeds 33% of grant income, and it takes 3 funders to reach half.
the vertical line marks half of all grant income — 3 funders to its left
45% 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 MIANUS RIVER GORGE INC.
Largest funder’s share by year: 2017 19% · 2018 83% · 2019 60% · 2020 20% · 2021 45% · 2022 36% · 2023 21% — 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.
How long its funders stay
43% of MIANUS RIVER GORGE INC's funders are still giving 3 years after their first grant; 67% 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
MIANUS RIVER GORGE INC draws 92% of its grant income from funders outside New York, across 10 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $1.1M arriving through sponsors registered in 7 statesis 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 54 funders put you under-funded among the 400 organizations that share them.
- Louis and Anne Abrons Foundation Incshared fundersDE · backs 67 organizations that share your funders
- Johanette Wallerstein Institute 5607-00-43portfolio matchits grantees resemble your mission
- Earthwatch Institute Incportfolio matchits grantees resemble your mission
- Betty Lewis Environmental Charitable Trustportfolio matchits grantees resemble your mission
- Butler Parklands Incportfolio matchits grantees resemble your mission
- The Rothenberg Ludden Trustportfolio matchits grantees resemble your mission
- Defenders of Wildlifeportfolio matchits grantees resemble your mission
- Sunkara Family Foundationportfolio matchits grantees resemble your mission
- Planet Womenportfolio matchits grantees resemble your mission
- Rahr Foundationportfolio matchits grantees resemble your mission
- The Menezes Foundation Incportfolio matchits grantees resemble your mission
- Open Space Institute Incportfolio 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 MIANUS RIVER GORGE INC
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 New York
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
66% of spending goes to programs.
Governance
Public support
71%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 2 states
Screen this organization
A dated, signed PDF of the compliance screen for MIANUS RIVER GORGE INC: 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 MIANUS RIVER GORGE INC?
- MIANUS RIVER GORGE INC (New York) receives grants from 54 organizations whose IRS filings report $3,500,674 to it, the largest being Brothers Brook Foundation ($1,165,160). 36 of them have funded it in more than one year.
- How many funders does MIANUS RIVER GORGE INC have?
- IRS filings report 54 organizations giving $3,500,674 in grants to MIANUS RIVER GORGE INC, 36 of which have funded it in more than one year.
- Who is the largest funder of MIANUS RIVER GORGE INC?
- Brothers Brook Foundation is the largest funder on record, with $1,165,160 in grants. The full list of funders is on this page.
- How can an organization like MIANUS RIVER GORGE INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in New York. 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 FY2025 (financials across 2017–2025), and the filings of 54funders 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