Connecticut · Nonprofit
WILLIAM L GILBERT SCHOOL CORP
WILLIAM L GILBERT SCHOOL CORP (Connecticut) receives grants from 2 organizations whose IRS filings report $37,500 to it, the largest being ROBERT ROSENHEIM FOUNDATION INC ROSENHEIM ($29,500). 1 of them have funded it in more than one year.
- Revenue FY2025
- $9.7M
- Funders on record
- 2
- Grants received
- $38k
- Net assets
- $10.0M
What William L Gilbert School Corp does
Mission
Support education of students in grades 7-12.
As stated on its FY2025 Form 990.
Program
Operation of A SCHOOL FOR GRADES 7-12 for residents of Winchester and Hartland.
$9,639,205 spent$9,218,727 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $9,639,205.
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 2023 to 2024, from $8.9M to $11M (+23%).
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: 2017 0% · 2018 1% · 2019 1% · 2020 11% · 2021 4% · 2022 5% · 2023 6% · 2024 23% · 2025 5%. Grants only. Government contracts and fees sit inside program revenue.
5% of WILLIAM L GILBERT SCHOOL CORP’s revenue is contributions — more earned-revenue than three-quarters of its peers (48% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 7 of the last 9 reported years ran a deficit.
reserve
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.
Who funds it, year by year
2019 → 2023: the base held at 1 funder, grant income fell $8k → $5k.
Left out of every figure on this page: $185k from one payer (the payer shares this organization's board, largest Wl Gilbert Trust Corporation). These are real filings, and they are not money WILLIAM L GILBERT SCHOOL CORP raised.
From the IRS filings of WILLIAM L GILBERT SCHOOL CORP’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
WILLIAM L GILBERT SCHOOL CORP 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: 2019 100% · 2022 100% · 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
79% of WILLIAM L GILBERT SCHOOL CORP's grant income comes from Connecticut funders.
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
WILLIAM L GILBERT SCHOOL CORP receives grants from 2 organizations whose IRS filings report $38k to it.
this organization peer median middle 50% of peers· 9,615 education nonprofits $1M–$10M, FY2025
Organizations like WILLIAM L GILBERT SCHOOL CORP
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.
Where the money goes
98% of spending goes to programs.
Governance
Footprint & structure
Part of a family of 1 related entity
- W L Gilbert Trust Corporation · exempt
Screen this organization
A dated, signed PDF of the compliance screen for WILLIAM L GILBERT SCHOOL CORP: 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 WILLIAM L GILBERT SCHOOL CORP?
- WILLIAM L GILBERT SCHOOL CORP (Connecticut) receives grants from 2 organizations whose IRS filings report $37,500 to it, the largest being ROBERT ROSENHEIM FOUNDATION INC ROSENHEIM ($29,500). 1 of them have funded it in more than one year.
- How many funders does WILLIAM L GILBERT SCHOOL CORP have?
- IRS filings report 2 organizations giving $37,500 in grants to WILLIAM L GILBERT SCHOOL CORP, 1 of which have funded it in more than one year.
- Who is the largest funder of WILLIAM L GILBERT SCHOOL CORP?
- ROBERT ROSENHEIM FOUNDATION INC ROSENHEIM is the largest funder on record, with $29,500 in grants. The full list of funders is on this page.
- How can an organization like WILLIAM L GILBERT SCHOOL CORP 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.
Play a game about who funds William L Gilbert School →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), 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 22, 2026. What this page cannot tell you · view filing