New York · Nonprofit
Spiral House Park
Spiral House Park (New York) receives grants from 2 organizations whose IRS filings report $531,374 to it, the largest being OPEN SPACE INSTITUTE INC ($356,374). 0 of them have funded it in more than one year.
Against its field
Spiral House Park is better cushioned than half of the 157 environment nonprofits its size.
this organization peer median middle 50% of peers· 157 environment nonprofits $10M–$100M, 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.
- Wilburforce Foundationshared funders
- The Scenic Hudson Land Trust Incportfolio match
- Parks & Trails New York Incportfolio match
Who funds it, year by year
Grant support over time, funder by funder — shade shows the grant size each year.
From the IRS filings of Spiral House Park’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
Spiral House Park leans on a few funders — its largest provides 67% 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
67% 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 Spiral House Park.
“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 Spiral House Park's grant income comes from New York funders.
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.
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.
- Wilburforce Foundationshared fundersWA · backs 35 organizations that share your funders
- The Scenic Hudson Land Trust Incportfolio matchits grantees resemble your mission
- Parks & Trails New York Incportfolio matchits grantees resemble your mission
- Erie Canalway Heritage Fund Incportfolio matchits grantees resemble your mission
- Peggy N & Roger G Gerry Charitableportfolio matchits grantees resemble your mission
- Central Park Conservancy Incportfolio matchits grantees resemble your mission
- Preservation League of New York Stateportfolio matchits grantees resemble your mission
- The Dorothy and Marshall M Reisman Foundationportfolio matchits grantees resemble your mission
- The Tianaderrah Foundation (NY)portfolio matchits grantees resemble your mission
- The Walbridge Fundportfolio matchits grantees resemble your mission
- Jane W Nuhn Charitable Trustportfolio matchits grantees resemble your mission
- Gerry Foundation 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 Spiral House Park
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
77% of spending goes to programs.
Governance
Public support
0%
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 Spiral House Park: 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 Spiral House Park?
- Spiral House Park (New York) receives grants from 2 organizations whose IRS filings report $531,374 to it, the largest being OPEN SPACE INSTITUTE INC ($356,374). 0 of them have funded it in more than one year.
- How many funders does Spiral House Park have?
- IRS filings report 2 organizations giving $531,374 in grants to Spiral House Park.
- Who is the largest funder of Spiral House Park?
- OPEN SPACE INSTITUTE INC is the largest funder on record, with $356,374 in grants. The full list of funders is on this page.
- How can an organization like Spiral House Park 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 2025–2025), and the filings of 2funders 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