Pennsylvania · Nonprofit
GREAT MARSH INSTITUTE LTD
GREAT MARSH INSTITUTE LTD (Pennsylvania) receives grants from 2 organizations whose IRS filings report $2,000 to it, the largest being THE PFIZER FOUNDATION INC ($1,000). 1 of them have funded it in more than one year.
- Revenue FY2025
- $33k
- Funders on record
- 2
- Grants received
- $2k
- Net assets
- $6k
What Great Marsh Institute Ltd does
Mission
Great marsh is a non-profit whose mission is to support scientific studies, educational opportunities and protecting the great marsh of northern chester county, pennsylvania.
As stated on its FY2025 Form 990-EZ.
Program
All program service expenses are incurred in supporting scientific studies, educational opportunities, and protecting the great marsh of northern chester county, pennsylvania.
$26,007 spent100% of program spending
The program described on its FY2025 Form 990-EZ. Program spending in total: $26,007.
The organization over time
Each line starts at 100 in 2018, so what you read is the shape rather than the size: 150 means half as much again as 2018, 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.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2020 to 2021, from $3k to $13k (+266%).
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 GREAT MARSH INSTITUTE LTD’s revenue is contributions — more reliant on donations than three-quarters of its peers (92% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 8 reported years ran a deficit.
Who funds it, year by year
2021 → 2023: the base narrowed from 2 funders to 1 funder, grant income fell $2k → $500.
From the IRS filings of GREAT MARSH INSTITUTE LTD’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
GREAT MARSH INSTITUTE LTD leans on a few funders — its largest provides 50% 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: 2021 67% · 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
GREAT MARSH INSTITUTE LTD draws 100% of its grant income from funders outside Pennsylvania, across 2 states in all.
In-state vs out-of-state, by year
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.
Against its field
GREAT MARSH INSTITUTE LTD has grown faster than three-quarters of the 2,195 environment nonprofits its size.
this organization peer median middle 50% of peers· 2,195 environment nonprofits under $100k, FY2025
Organizations like GREAT MARSH INSTITUTE LTD
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Pennsylvania
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Public support
48%
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 GREAT MARSH INSTITUTE LTD: 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. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds GREAT MARSH INSTITUTE LTD?
- GREAT MARSH INSTITUTE LTD (Pennsylvania) receives grants from 2 organizations whose IRS filings report $2,000 to it, the largest being THE PFIZER FOUNDATION INC ($1,000). 1 of them have funded it in more than one year.
- How many funders does GREAT MARSH INSTITUTE LTD have?
- IRS filings report 2 organizations giving $2,000 in grants to GREAT MARSH INSTITUTE LTD, 1 of which have funded it in more than one year.
- Who is the largest funder of GREAT MARSH INSTITUTE LTD?
- THE PFIZER FOUNDATION INC is the largest funder on record, with $1,000 in grants. The full list of funders is on this page.
- How can an organization like GREAT MARSH INSTITUTE LTD find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Pennsylvania. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Great Marsh Institute Ltd →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2018–2025), and the filings of 2 funders 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 October 14, 2026. What this page cannot tell you · view filing