Massachusetts · Nonprofit
THE LESLIE ST FANG FOUNDATION
THE LESLIE ST FANG FOUNDATION (Massachusetts) receives grants from 11 organizations whose IRS filings report $687,500 to it, the largest being THE KURZ FAMILY FOUNDATION LTD ($400,000). 4 of them have funded it in more than one year.
- Revenue FY2024
- $270k
- Funders on record
- 11
- Grants received
- $688k
- Net assets
- $2.8M
What The Leslie St Fang Foundation does
Programs
Establish a fund to support frontline appreciation for the physicians, nurses, patient care aides, administrative staff, educators and educational webinars (covid).
$19,000 spentSupport clinical research operations at harvard medical school
$0 spentProvide covid-19 relief:1.) source and donate ppe, disinfectants, cleaning supplies and equipment to the frontline workers in medicine, dentistry, and education.2) source and donate masks for use in public.
$10,921 spent
The 3 programs described on its FY2024 Form 990-PF.
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 2019 to 2020, from $1.3M to $3.1M (+127%).
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 1 funder to 4 funders, grant income fell $100k → $28k.
2 of 11 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 28% 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 LESLIE ST FANG FOUNDATION’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
THE LESLIE ST FANG FOUNDATION leans on a few funders — its largest provides 58% of grant income and the top three 87%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
28% 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 LESLIE ST FANG FOUNDATION.
Largest funder’s share by year: 2017 100% · 2018 86% · 2019 100% · 2020 80% · 2021 77% · 2022 67% · 2023 36% — 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
25% of THE LESLIE ST FANG FOUNDATION's funders are still giving 3 years after their first grant; 36% 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
THE LESLIE ST FANG FOUNDATION draws 81% of its grant income from funders outside Massachusetts, across 2 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $195k arriving through sponsors registered in 2 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 LESLIE ST FANG FOUNDATION has grown faster than half of the 7,117 philanthropy nonprofits its size.
this organization peer median middle 50% of peers· 7,117 philanthropy nonprofits $100k–$1M, FY2024
Organizations like THE LESLIE ST FANG 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 Massachusetts
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Screen this organization
A dated, signed PDF of the compliance screen for THE LESLIE ST FANG 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 THE LESLIE ST FANG FOUNDATION?
- THE LESLIE ST FANG FOUNDATION (Massachusetts) receives grants from 11 organizations whose IRS filings report $687,500 to it, the largest being THE KURZ FAMILY FOUNDATION LTD ($400,000). 4 of them have funded it in more than one year.
- How many funders does THE LESLIE ST FANG FOUNDATION have?
- IRS filings report 11 organizations giving $687,500 in grants to THE LESLIE ST FANG FOUNDATION, 4 of which have funded it in more than one year.
- Who is the largest funder of THE LESLIE ST FANG FOUNDATION?
- THE KURZ FAMILY FOUNDATION LTD is the largest funder on record, with $400,000 in grants. The full list of funders is on this page.
- How can an organization like THE LESLIE ST FANG FOUNDATION 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.
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 11 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