New York · Nonprofit
Historical Society of Greater Port Jefferson
Historical Society of Greater Port Jefferson (New York) receives grants from 3 organizations whose IRS filings report $67,809 to it, the largest being APPLE SEED FOUNDATION INC ($44,000). 3 of them have funded it in more than one year.
Against its field
Historical Society of Greater Port Jefferson runs a healthier operating margin than three-quarters of the 17,904 arts & culture nonprofits its size.
this organization peer median middle 50% of peers· 17,904 arts & culture nonprofits $100k–$1M, 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.
- Peggy N & Roger G Gerry Charitableshared fundersportfolio match
- Charles and Helen Reichert Family Foundation Incshared funderslocalportfolio 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.
Government-grant reliance: 2023 8% · 2024 1%. Grants only. Government contracts and fees sit inside program revenue.
52% of Historical Society of Greater Port Jefferson’s revenue is contributions — about as donation-reliant as the typical peer (64% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 3 of the last 8 reported years ran a deficit.
reserve
Who funds it, year by year
2017 → 2023: the base narrowed from 2 funders to 1 funder, grant income fell $31k → $72.
1 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 1% 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 Historical Society of Greater Port Jefferson’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
Historical Society of Greater Port Jefferson leans on a few funders — its largest provides 65% 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: 2017 70% · 2018 100% · 2019 100% · 2020 97% · 2021 100% · 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 Historical Society of Greater Port Jefferson'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. $348 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.
- Peggy N & Roger G Gerry Charitableshared fundersportfolio matchPA · backs 10 organizations that share your funders · its grantees resemble your mission
- Charles and Helen Reichert Family Foundation Incshared funderslocalportfolio matchNY · backs 6 organizations that share your funders · funds 23 organizations near you · its grantees resemble your mission
- Greater Hudson Heritage Networkshared fundersportfolio matchNY · backs 25 organizations that share your funders · its grantees resemble your mission
- Preservation League of New York Stateshared fundersportfolio matchNY · backs 14 organizations that share your funders · its grantees resemble your mission
- The Order of Colonial Lords of Manors in Americaportfolio matchits grantees resemble your mission
- The William G Pomeroy Foundationportfolio matchits grantees resemble your mission
- Leo Cox Beach Philanthropic Foundportfolio matchits grantees resemble your mission
- Historic House Trust of New York City Incportfolio matchits grantees resemble your mission
- Connecticut Trust for Historic Preservation Incportfolio matchits grantees resemble your mission
- Washington County Home for Aged Women Incportfolio matchits grantees resemble your mission
- Argersinger Charitable Trustportfolio matchits grantees resemble your mission
- The Computing Research Association Incshared fundersDC · backs 7 organizations that share your funders
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 Historical Society of Greater Port Jefferson
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
28% of spending goes to programs.
Governance
Public support
45%
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 Historical Society of Greater Port Jefferson: 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 Historical Society of Greater Port Jefferson?
- Historical Society of Greater Port Jefferson (New York) receives grants from 3 organizations whose IRS filings report $67,809 to it, the largest being APPLE SEED FOUNDATION INC ($44,000). 3 of them have funded it in more than one year.
- How many funders does Historical Society of Greater Port Jefferson have?
- IRS filings report 3 organizations giving $67,809 in grants to Historical Society of Greater Port Jefferson, 3 of which have funded it in more than one year.
- Who is the largest funder of Historical Society of Greater Port Jefferson?
- APPLE SEED FOUNDATION INC is the largest funder on record, with $44,000 in grants. The full list of funders is on this page.
- How can an organization like Historical Society of Greater Port Jefferson 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