Massachusetts · Nonprofit
THE WINSOR SCHOOL
THE WINSOR SCHOOL (Massachusetts) receives grants from 106 organizations whose IRS filings report $36,329,864 to it, the largest being FIDELITY INVESTMENTS CHARITABLE GIFT FUND ($10,685,053). 77 of them have funded it in more than one year, and 58% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $43M
- Funders on record
- 106
- Grants received
- $36M
- Net assets
- $206M
What The Winsor School does
Mission
Our mission: The Winsor School prepares young women to pursue their aspirations and contribute to the world.
As stated on its FY2025 Form 990.
Programs
The Winsor School offers a rich and challenging curriculum to academically motivated girls in grades 5-12. Winsor defines curriculum as the total classroom learning experience for all students. Our curricular philosophy is based on our understandings about student learning, the pedagogies we practice in response to these understandings, the ways we assess learning, and the qualities of character we encourage our students to develop - as well as the skills and content more commonly associated with "curriculum." our curriculum is a designed continuum of developmentally appropriate learning experiences across departments. Winsor faculty knows and understands the curriculum and takes responsibility for teaching it.core curriculumthe core curriculum consists of the following departments: math, english, science, history, world languages, physical education, and performing and visual arts. Additionally, students take courses in stem, health and wellness, and library skills. Our graduation requirements exceed the state requirements, and prepare our students to succeed at the most selective colleges nationally and worldwide. Students take an average of 5-6 classes per semester, meet…
$25,721,419 spent$31,111,431 earned by the program82% of program spendingWinsor believes in enrolling talented students with great potential regardless of their families' financial circumstances, and awards over $5.6 million annually in need-based financial aid to make the school financially accessible to a range of families. Over 25% of our students receive need-based tuition assistance, with grants covering from 5% to 100% of overall tuition.
$5,632,895 spentof which $5,632,895 as grants18% of program spending
The 2 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $31,354,314.
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 2024 to 2025, from $235M to $257M (+9%).
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.
23% of THE WINSOR SCHOOL’s revenue is contributions — about as donation-reliant as the typical peer (23% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 4 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
2017 → 2023: the base broadened from 30 funders to 60 funders, grant income rose $2.1M → $8.3M.
17 of 106 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 58% 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 THE WINSOR SCHOOL’s funders (the co-funder graph). Top 30 of 106 funders by total. 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
THE WINSOR SCHOOL has a broad base — no single funder exceeds 29% of grant income, and it takes 4 funders to reach half.
the vertical line marks half of all grant income — 4 funders to its left
58% 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 THE WINSOR SCHOOL.
Largest funder’s share by year: 2017 54% · 2018 45% · 2019 44% · 2020 39% · 2021 34% · 2022 28% · 2023 25% — diversifying over time.
“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.
How long its funders stay
58% of THE WINSOR SCHOOL's funders are still giving 3 years after their first grant; 73% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
58% of THE WINSOR SCHOOL's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $15M that is directly attributable, 91% of it comes from Massachusetts funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $21M arriving through sponsors registered in 11 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
THE WINSOR SCHOOL's revenue grew 45% between 2017 and 2025.
this organization peer median middle 50% of peers· 3,794 education nonprofits $10M–$100M, FY2025
Organizations like THE WINSOR SCHOOL
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 Massachusetts
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
75% of spending goes to programs.
Governance
Public support
70%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for THE WINSOR SCHOOL: 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 THE WINSOR SCHOOL?
- THE WINSOR SCHOOL (Massachusetts) receives grants from 106 organizations whose IRS filings report $36,329,864 to it, the largest being FIDELITY INVESTMENTS CHARITABLE GIFT FUND ($10,685,053). 77 of them have funded it in more than one year, and 58% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does THE WINSOR SCHOOL have?
- IRS filings report 106 organizations giving $36,329,864 in grants to THE WINSOR SCHOOL, 77 of which have funded it in more than one year.
- Who is the largest funder of THE WINSOR SCHOOL?
- FIDELITY INVESTMENTS CHARITABLE GIFT FUND is the largest funder on record, with $10,685,053 in grants. The full list of funders is on this page.
- How can an organization like THE WINSOR SCHOOL find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Massachusetts. 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 Winsor 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 106 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