New York · Nonprofit
CASTLE ISLAND BILINGUAL MONTESSORI
CASTLE ISLAND BILINGUAL MONTESSORI (New York) receives grants from 4 organizations whose IRS filings report $7,805 to it, the largest being CAPITALIZE ALBANY CORPORATION ($6,800). 1 of them have funded it in more than one year.
- Revenue FY2025
- $637k
- Funders on record
- 4
- Grants received
- $8k
- Net assets
- $-28472
What Castle Island Bilingual Montessori does
Mission
Education of students ages 3 through 12
As stated on its FY2025 Form 990.
Program
Castle island is an independent school incorporated through the new york state education department and a full member school of the american montessori society serving children ages three to twelve in preschool through fifth grade in order to provide an accessible world-class education dually immersed in english and spanish in a fully implemented montessori environment for families in the capital region
$662,489 spent$636,874 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $662,489.
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 2022 to 2023, from $55k to $88k (+61%).
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: 2021 20% · 2025 13%. Grants only. Government contracts and fees sit inside program revenue.
20% of CASTLE ISLAND BILINGUAL MONTESSORI’s revenue is contributions — about as donation-reliant as the typical peer (57% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 3 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
2018 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $125 → $7k.
1 of 4 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 5% 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 CASTLE ISLAND BILINGUAL MONTESSORI’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
CASTLE ISLAND BILINGUAL MONTESSORI leans on a few funders — its largest provides 87% of grant income and the top three 98%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
92% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund CASTLE ISLAND BILINGUAL MONTESSORI.
Largest funder’s share by year: 2018 100% · 2020 100% · 2021 100% · 2022 100% · 2023 99% — 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
93% of CASTLE ISLAND BILINGUAL MONTESSORI'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. $380 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.
Against its field
CASTLE ISLAND BILINGUAL MONTESSORI has grown faster than half of the 16,849 education nonprofits its size.
this organization peer median middle 50% of peers· 16,849 education nonprofits $100k–$1M, FY2025
Organizations like CASTLE ISLAND BILINGUAL MONTESSORI
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 New York
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
100% of spending goes to programs.
Governance
Screen this organization
A dated, signed PDF of the compliance screen for CASTLE ISLAND BILINGUAL MONTESSORI: 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 CASTLE ISLAND BILINGUAL MONTESSORI?
- CASTLE ISLAND BILINGUAL MONTESSORI (New York) receives grants from 4 organizations whose IRS filings report $7,805 to it, the largest being CAPITALIZE ALBANY CORPORATION ($6,800). 1 of them have funded it in more than one year.
- How many funders does CASTLE ISLAND BILINGUAL MONTESSORI have?
- IRS filings report 4 organizations giving $7,805 in grants to CASTLE ISLAND BILINGUAL MONTESSORI, 1 of which have funded it in more than one year.
- Who is the largest funder of CASTLE ISLAND BILINGUAL MONTESSORI?
- CAPITALIZE ALBANY CORPORATION is the largest funder on record, with $6,800 in grants. The full list of funders is on this page.
- How can an organization like CASTLE ISLAND BILINGUAL MONTESSORI 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.
Play a game about who funds Castle Island Bilingual Montessori →
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 4 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