New York · Nonprofit
Horace Mann School
Horace Mann School (New York) receives grants from 161 organizations whose IRS filings report $49,563,254 to it, the largest being NATIONAL PHILANTHROPIC TRUST ($11,039,650). 114 of them have funded it in more than one year, and 59% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $146M
- Funders on record
- 161
- Grants received
- $50M
- Net assets
- $408M
What Horace Mann School does
Mission
Horace Mann School prepares a diverse community of students to lead great and giving lives. We strive to maintain a safe, secure, and caring environment in which mutual respect, mature behavior, and the life of the mind can thrive. We recognize and celebrate individual achievement and contributions to the common good.
As stated on its FY2025 Form 990.
Program
Horace Mann School is an educational institution conducting programs at the nursery, lower, middle, and high school levels. During the 2024-2025 school year, the student body consisted of 1,805 students.
$116,526,690 spentof which $16,007,662 as grants$120,176,524 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $116,526,690.
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 2017 to 2018, from $332M to $412M (+24%).
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 2% · 2018 1% · 2019 1% · 2020 1% · 2021 1% · 2022 1% · 2023 1% · 2024 1% · 2025 1%. Grants only. Government contracts and fees sit inside program revenue.
12% of Horace Mann School’s revenue is contributions — about as donation-reliant as the typical peer (14% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 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.
Board chair
Matthew Mark
Chair
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 52 funders to 75 funders, grant income rose $3.6M → $4.6M.
33 of 161 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 59% 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 Horace Mann School’s funders (the co-funder graph). Top 30 of 161 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
Horace Mann School has a broad base — no single funder exceeds 22% of grant income, and it takes 5 funders to reach half.
the vertical line marks half of all grant income — 5 funders to its left
59% 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 Horace Mann School.
Largest funder’s share by year: 2017 28% · 2018 34% · 2019 22% · 2020 15% · 2021 19% · 2022 44% · 2023 19% — 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
57% of Horace Mann School's funders are still giving 3 years after their first grant; 71% 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
59% of Horace Mann 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 $20M that is directly attributable, 61% of it comes from New York funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $29M arriving through sponsors registered in 21 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
Horace Mann School runs a healthier operating margin than half of the 684 education nonprofits its size.
this organization peer median middle 50% of peers· 684 education nonprofits over $100M, FY2025
Organizations like Horace Mann 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 New York
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
89% of spending goes to programs.
Governance
Footprint & structure
Files a return copy in 1 state
Part of a family of 1 related entity
- John Dorr Nature Lab of Horace Mann School · exempt
Screen this organization
A dated, signed PDF of the compliance screen for Horace Mann 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 Horace Mann School?
- Horace Mann School (New York) receives grants from 161 organizations whose IRS filings report $49,563,254 to it, the largest being NATIONAL PHILANTHROPIC TRUST ($11,039,650). 114 of them have funded it in more than one year, and 59% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does Horace Mann School have?
- IRS filings report 161 organizations giving $49,563,254 in grants to Horace Mann School, 114 of which have funded it in more than one year.
- Who is the largest funder of Horace Mann School?
- NATIONAL PHILANTHROPIC TRUST is the largest funder on record, with $11,039,650 in grants. The full list of funders is on this page.
- How can an organization like Horace Mann School 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.
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 161 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