· Private foundation
The Leff Family Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k3 grants · $4k
- $10k–50k2 grants · $22k
- $50k–250k3 grants · $200k
| Recipient | Amount |
|---|---|
| USA TRIATHLON FOUNDATION | $100,000 |
| HABITAT FOR HUMANITY OF GREATER BUCKS INC | $50,000 |
| THE WETLANDS INSTITUTE | $50,000 |
| OSCAR HAMMERSTEIN MUSEUM | $12,000 |
| JAMES A MICHENER ART MUSEUM | $10,000 |
| TIM KERR CHARITIES | $2,000 |
| HEALTHY KIDS RUNNING SERIES | $1,152 |
| Individual grant recipient | $1,000 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY17–19, $15k) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 98% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
Which US states your grants reach
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
11 repeat relationships — 7 still active in FY2025, 4 since wound down; 1 grantees were first funded in FY2025 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2025, 100% of grant dollars renewed an existing relationship; $1k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Backed again, and grew
- TWTHE WETLANDS INSTITUTE9× · 2017–2025 · $319k · revenue +348%
- UTUSA Triathlon Foundation4× · 2022–2025 · $240k · revenue +42%
- JAJAMES A MICHENER ART MUSEUM9× · 2017–2025 · $235k · revenue +21%
Funded once
- VCVETERINARY CARE FOUNDATION INCORPORATEDgraduatedone grant, 2023 · $20k · revenue +53%
- IGIndividual grant recipientone grant, 2017 · $5k
- EEverwalkgraduatedone grant, 2019 · $5k · revenue +84%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
To define and advance quality, effective, equitable, and accessible cancer care and prevention so all people can live better lives.
Preserve the integrity of competition, inspire true sport, protect the rights of u.s. athletes
The mission of children's cancer cause is to champion policies and programs that improve the lives of children with cancer and survivors.
Our mission: to improve the quality of health care.our vision: better health care. better choices. better health.
Advance science, engineering, and innovation throughout the world for the benefit of all. the world's largest multidisciplinary scientific society and a leading publisher of cutting-edge research through its science family of journals,…
Empowering the competitive excellence and well-being of team usa athletes, championing the power of sport, and inspiring the nation.
The Academy's mission is to enhance member career fulfillment and promote brain health for all.
Through philanthropy, empower current and future food and nutrition practitioners to optimize global health.
The kidney cancer association is a global community dedicated to serving and empowering patients, and leading change through advocacy, research, and education in order to be the universal leader in finding the cure for kidney cancer.
We believe every child in america should have equal opportunity and resources to engage in a quality education. by partnering with teachers and students in under-resourced schools, we provide the support needed to create equitable learning…
Our goal is to sustainably improve animal welfare, provide veterinary care, and improve veterinary education globally. in order to achieve this goal, we work in over 10 countries, across 5 continents, supporting local people and animals,…
To make kids better today and healthier tomorrow.
For reference, the grantee most central to the portfolio’s shape is Special Olympics Pennsylvania Inc and the most unlike its peers is Everwalk. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
17 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 17 of the 28 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds THE WETLANDS INSTITUTE ↗
- Who funds USA Triathlon Foundation ↗
- Who funds JAMES A MICHENER ART MUSEUM ↗
- Who funds VETERINARY CARE FOUNDATION INCORPORATED ↗
- Who funds BLESSINGS IN A BACKPACK INC ↗
- Who funds AMERICAN CANCER SOCIETY INC ↗
- Who funds Everwalk ↗
- Who funds The Florida Aquarium Inc ↗
- Who funds TIM KERR CHARITIES INC ↗
- Who funds COMMUNITY COORDINATED CHILD CARE INC ↗
- Who funds DRESS FOR SUCCESS AUSTIN ↗
- Who funds SPECIAL OLYMPICS PENNSYLVANIA INC ↗
- Who funds HEALTHY KIDS RUNNING SERIES ↗
- Who funds Philabundance ↗
- Who funds BUDS TO BLOSSOMS ↗
- Who funds Best Buddies International Inc ↗
- Who funds DONORSCHOOSEORG ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Jpmorgan Chase Foundation · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization The Leff Family Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
- Best Buddies International Inc — 4% of income from government
- The Wetlands Institute — 2% of income from government
- The Florida Aquarium Inc — 0% of income from government
Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.