New York · Nonprofit
WILMINGTON HISTORICAL SOCIETY
WILMINGTON HISTORICAL SOCIETY (New York) receives grants from 3 organizations whose IRS filings report $1,442 to it, the largest being THE WILLIAM G POMEROY FOUNDATION ($1,140). 1 of them have funded it in more than one year.
Against its field
WILMINGTON HISTORICAL SOCIETY runs a healthier operating margin than three-quarters of the 14,524 arts & culture nonprofits its size.
this organization peer median middle 50% of peers· 14,524 arts & culture nonprofits under $100k, 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.
- Robert David Lion Gardiner Foundation Incshared fundersportfolio match
- Preservation League of New York Stateshared fundersportfolio match
- Greater Hudson Heritage Networkshared fundersportfolio 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.
53% of WILMINGTON HISTORICAL SOCIETY’s revenue is contributions — about as donation-reliant as the typical peer (78% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 of the last 8 reported years ran a deficit.
Who funds it, year by year
2020 → 2023: the base narrowed from 2 funders to 1 funder, grant income fell $103 → $56.
1 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 17% 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 WILMINGTON HISTORICAL SOCIETY’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
WILMINGTON HISTORICAL SOCIETY leans on a few funders — its largest provides 79% 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 51% · 2021 94% · 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
96% of WILMINGTON HISTORICAL SOCIETY's grant income comes from New York funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $252 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.
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.
- Robert David Lion Gardiner Foundation Incshared fundersportfolio matchNY · backs 19 organizations that share your funders · its grantees resemble your mission
- Preservation League of New York Stateshared fundersportfolio matchNY · backs 39 organizations that share your funders · its grantees resemble your mission
- Greater Hudson Heritage Networkshared fundersportfolio matchNY · backs 34 organizations that share your funders · its grantees resemble your mission
- Henry Uihlein II and Mildred a Uihlein FoundationlocalNY · funds 24 organizations near you
- Leo Cox Beach Philanthropic Foundportfolio matchits grantees resemble your mission
- New Hampshire Preservation Allianceportfolio matchits grantees resemble your mission
- Connecticut Trust for Historic Preservation Incportfolio matchits grantees resemble your mission
- The Order of Colonial Lords of Manors in Americaportfolio matchits grantees resemble your mission
- New Hampshire Humanities Councilportfolio matchits grantees resemble your mission
- Peggy N & Roger G Gerry Charitableportfolio matchits grantees resemble your mission
- Washington County Home for Aged Women Incportfolio matchits grantees resemble your mission
- Indiana Historical Societyportfolio 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 WILMINGTON HISTORICAL SOCIETY
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.
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 WILMINGTON HISTORICAL SOCIETY: 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 WILMINGTON HISTORICAL SOCIETY?
- WILMINGTON HISTORICAL SOCIETY (New York) receives grants from 3 organizations whose IRS filings report $1,442 to it, the largest being THE WILLIAM G POMEROY FOUNDATION ($1,140). 1 of them have funded it in more than one year.
- How many funders does WILMINGTON HISTORICAL SOCIETY have?
- IRS filings report 3 organizations giving $1,442 in grants to WILMINGTON HISTORICAL SOCIETY, 1 of which have funded it in more than one year.
- Who is the largest funder of WILMINGTON HISTORICAL SOCIETY?
- THE WILLIAM G POMEROY FOUNDATION is the largest funder on record, with $1,140 in grants. The full list of funders is on this page.
- How can an organization like WILMINGTON HISTORICAL SOCIETY 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 FY2024 (financials across 2017–2024), and the filings of 3funders 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