New York · Nonprofit
STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION
STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION (New York) receives grants from 4019 organizations whose IRS filings report $340,268,192 to it, the largest being ESTHER AND HAROLD MERTZ FOUNDATION ($62,152,241). 2317 of them have funded it in more than one year.
- Revenue FY2024
- $559M
- Funders on record
- 4,019
- Grants received
- $340M
- Net assets
- $501M
What Stephen Siller Tunnel to Towers Foundation does
Mission
The mission of the Stephen Siller Tunnel to Towers Foundation is to honor the sacrifice of fdny firefighter stephen siller, and all those who laid down their lives to save others on september 11, 2001. We also honor our military, and first responders who continue to make the supreme sacrifice of life and limb for our country.
As stated on its FY2024 Form 990.
Programs
In the line of duty programs: 1) smart home program: this program constructs custom, specially adapted smart homes for catastrophically injured service members and first responders to restore their ability to live a life of independence. 2) fallen first responder home program: the foundation provides mortgage free homes to families with young children left behind when a firefighter or police officer is killed in the line of duty. 3) gold star home program: the foundation provides mortgage free homes to families with young children when a service member dies in the line of duty. 4) homeless veterans program - the foundation is committed to honoring the sacrifice of american service members and helping end homelessness amongst the veteran community. Providing a safe and dignified residence is an integral part of helping veterans who are homeless reclaim their lives. Veterans in this program receive the support they need to help them address any obstacles to living a more independent life. In addition to delivering housing, we provide comprehensive care through our national case management team by connecting veterans who have additional needs with mental health counseling, addiction…
$307,183,639 spentof which $166,723,632 as grants92% of program spendingNever forget programs: 1)national tunnel to towers runs and stair climb series: the new york city 5k run and tower climb as well as the national runs and climbs are memorial events held in honor of stephen siller (fdny), and all who perished on 9/11, as well as first responders and military who continue to put their lives on the line to serve and protect our nation. The foundation has established these memorial events to ensure we never forget 2) tunnel to towers 9/11 institute: this is our september 11, 2001 education program. The foundation has developed a curriculum for grades k- 12 that can be accessed by teachers throughout the nation to educate children about the history of 9/11. The program also includes a mobile exhibit, which serves to educate and pay tribute to the sacrifices made on september 11, 2001. 3) wings of a hero: to help local community children in need who have lost a parent by providing assistance for school, counseling or other needs. 4)legacy awards: to assist families of military or first responders and other cases where there is immediate special financial need.
$28,220,151 spentof which $6,379,170 as grants$9,920,142 earned by the program8% of program spending
The 2 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $335,403,790.
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 $432M to $653M (+51%).
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.
96% of STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION’s revenue is contributions — more reliant on donations than three-quarters of its peers (14% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 of the last 8 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 39 funders to 1857 funders, grant income rose $1.9M → $42M.
239 of 4019 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 46% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
Left out of every figure on this page: $13k from 2 payers (the payer's own filing calls it a related party, largest The Mike & Evelyn Walsh Foundation). These are real filings, and they are not money STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION raised.
From the IRS filings of STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION’s funders (the co-funder graph). Top 30 of 4019 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
STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION has a broad base — no single funder exceeds 18% of grant income, and it takes 6 funders to reach half.
the vertical line marks half of all grant income — 6 funders to its left
55% 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 STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION.
Largest funder’s share by year: 2017 84% · 2018 65% · 2019 39% · 2020 48% · 2021 14% · 2022 28% · 2023 12% — 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
66% of STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION's funders are still giving 3 years after their first grant; 58% 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
STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION draws 95% of its grant income from funders outside New York, across 50 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $157M arriving through sponsors registered in 43 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
STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION runs a healthier operating margin than three-quarters of the 696 education nonprofits its size.
this organization peer median middle 50% of peers· 696 education nonprofits over $100M, FY2024
Organizations like STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION
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
88% of spending goes to programs.
Governance
Public support
98%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 33 states
Screen this organization
A dated, signed PDF of the compliance screen for STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION: 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 STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION?
- STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION (New York) receives grants from 4019 organizations whose IRS filings report $340,268,192 to it, the largest being ESTHER AND HAROLD MERTZ FOUNDATION ($62,152,241). 2317 of them have funded it in more than one year.
- How many funders does STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION have?
- IRS filings report 4019 organizations giving $340,268,192 in grants to STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION, 2317 of which have funded it in more than one year.
- Who is the largest funder of STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION?
- ESTHER AND HAROLD MERTZ FOUNDATION is the largest funder on record, with $62,152,241 in grants. The full list of funders is on this page.
- How can an organization like STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION 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 FY2024 (financials across 2017–2024), and the filings of 4019 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