Connecticut · Nonprofit
GREAT HOLLOW MANAGEMENT INC
GREAT HOLLOW MANAGEMENT INC (Connecticut) receives grants from 5 organizations whose IRS filings report $2,948,204 to it, the largest being THE GOLDRING FAMILY FOUNDATIONINC ($2,875,000). 1 of them have funded it in more than one year.
- Revenue FY2024
- $447k
- Funders on record
- 5
- Grants received
- $2.9M
- Net assets
- $2.8M
What Great Hollow Management Inc does
Programs
Expenses are related to the improvements, maintenance and operation of the nature preserve and ecological research center dedicated to land and wildlife conservation, applied
$297,959 spentEcological research, experiential environmental education, and outdoor recreational opportunities for the public enjoyment of nature.
The 2 programs described on its FY2023 Form 990-PF.
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.
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 $2.9M to $2.9M (−2%).
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Chief executive
Chad Seewagen
Executive director
As listed on its FY2024 Form 990-PF.
Who funds it, year by year
2017 → 2023: the base held at 1 funder, grant income fell $850k → $200k.
2 of 5 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 GREAT HOLLOW MANAGEMENT INC’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 HOLLOW MANAGEMENT INC leans on a few funders — its largest provides 98% 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 100% · 2018 100% · 2019 99% · 2020 100% · 2021 100% · 2022 86% · 2023 100% — broadly stable.
“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 HOLLOW MANAGEMENT INC draws 100% of its grant income from funders outside Connecticut, across 3 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $18k arriving through sponsors registered in 2 states 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.
Against its field
GREAT HOLLOW MANAGEMENT INC holds deeper cash reserves than three-quarters of the 6,435 animals nonprofits its size.
this organization peer median middle 50% of peers· 6,435 animals nonprofits $100k–$1M, FY2024
Government funding GREAT HOLLOW MANAGEMENT INC receives
Grants and contracts to this organization from federal (USASpending) and state checkbooks, reconciled to its EIN. $44k on record.
- Pass thru Grant Non-State$23k
- Environmental Consulting Servi$21k
Federal grants vs contracts are distinguished; state line items keep their reported category. Matched by name + geography (the BMF), so coverage is partial and precision-first.
Organizations like GREAT HOLLOW MANAGEMENT INC
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 Connecticut
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Screen this organization
A dated, signed PDF of the compliance screen for GREAT HOLLOW MANAGEMENT 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. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds GREAT HOLLOW MANAGEMENT INC?
- GREAT HOLLOW MANAGEMENT INC (Connecticut) receives grants from 5 organizations whose IRS filings report $2,948,204 to it, the largest being THE GOLDRING FAMILY FOUNDATIONINC ($2,875,000). 1 of them have funded it in more than one year.
- How many funders does GREAT HOLLOW MANAGEMENT INC have?
- IRS filings report 5 organizations giving $2,948,204 in grants to GREAT HOLLOW MANAGEMENT INC, 1 of which have funded it in more than one year.
- Who is the largest funder of GREAT HOLLOW MANAGEMENT INC?
- THE GOLDRING FAMILY FOUNDATIONINC is the largest funder on record, with $2,875,000 in grants. The full list of funders is on this page.
- How can an organization like GREAT HOLLOW MANAGEMENT INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Connecticut. 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 5 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