Skip to content
The Leff Family Foundation at a glanceAlso receives grants: funding profile →

· Private foundation

The Leff Family Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$226k
Granted FY2025still arriving
8
Grants FY2025still arriving
3
States reached
$100k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0197% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Arts & Culture$422kEnvironment$319kHousing & Shelter$310kRecreation & Sports$245kAnimals$25kHealth$12kFood & Nutrition$10kCommunity Improvement$10kOther$0
02FY2025 · 8 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k3 grants · $4k
  • $10k–50k2 grants · $22k
  • $50k–250k3 grants · $200k
$12,000
Median grant
3
States reached
$2.7M
Total assets
Largest grants
RecipientAmount
USA TRIATHLON FOUNDATION$100,000
THE WETLANDS INSTITUTE$50,000
HABITAT FOR HUMANITY OF GREATER BUCKS INC$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
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its 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 its grants land in higher-need ZIPs.

area typical 11%BUDS TO BLOSSOMS: $250 → 10%BLESSINGS IN A BACKPACK: $5k → 15%BLESSINGS IN A BACKPACK: $5k → 15%COMMUNITY COORDINATED CHILD CARE: $5k → 15%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

NY
PA
NJ
CA
CO
KY
VA
MD
SC
TX
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

96%of every dollar goes to organizations it has funded before.
$1.3M · 11 repeat orgs$53k to everyone else

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

Re-uppedFunded once

Organizations

11
16

Total granted

$1.3M
$52k

Median revenue growth · since first grant

+29%
+71%

Still filing today

73%
56%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $1k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24’25
Human ServicesAnimalsRecreation & SportsArts & CultureCommunity ImprovementFood & NutritionOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • TW
    THE WETLANDS INSTITUTE
    9× · 2017–2025 · $319k · revenue +348%
  • UT
    USA Triathlon Foundation
    4× · 2022–2025 · $240k · revenue +79%
  • JA
    JAMES A MICHENER ART MUSEUM
    9× · 2017–2025 · $235k · revenue +21%

Funded once

  • VC
    VETERINARY CARE FOUNDATION INCORPORATEDgraduated
    one grant, 2023 · $20k · revenue +53%
  • CC
    COMMUNITY COORDINATED CHILD CARE INCgraduated
    one grant, 2017 · $5k · revenue +71%
  • TF
    The Florida Aquarium Incgraduated
    one grant, 2020 · $5k · revenue +138%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
National Comprehensive Cancer Network

To define and advance quality, effective, equitable, and accessible cancer care and prevention so all people can live better lives.

Health
2
United States Anti-Doping Agency

Preserve the integrity of competition, inspire true sport, protect the rights of u.s. athletes

Recreation & Sports
3
The Children's Cancer Cause Inc

The mission of children's cancer cause is to champion policies and programs that improve the lives of children with cancer and survivors.

Health
4
National Committee for Quality Assurance

Our mission: to improve the quality of health care.our vision: better health care. better choices. better health.

Health
5
American Association for the Advancement of Science

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,…

Science & Tech
6
United States Olympic and Paralympic Committee

Empowering the competitive excellence and well-being of team usa athletes, championing the power of sport, and inspiring the nation.

Recreation & Sports
7
American Academy of Neurology

The Academy's mission is to enhance member career fulfillment and promote brain health for all.

Community Improvement
8
Academy of Nutrition and Dietetics Foundation

Through philanthropy, empower current and future food and nutrition practitioners to optimize global health.

Health
9
The Kidney Cancer Association

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.

Health
10
Kids in Need Foundation

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…

Education
11
Worldwide Vets Incorporated

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,…

Animals
12
Children's Healthcare of Atlanta Inc

To make kids better today and healthier tomorrow.

Health
How this is measured
The grantee most central to the portfolio’s shape is Special Olympics Pennsylvania Inc; 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.
04the grantee network

17 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 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.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
17/17
Grantees still filing
14/17
Grew since first funded

Where the money sits, by cause and then by grantee

THE WETLANDS INSTITUTE: $318,500 · OtherTHE WETLANDS INSTITUTEHABITAT FOR HUMANITY OF GREATER BUCKS INC: $310,124 · OtherHABITAT FOR HUMANITY OF GREATER BUCKS INCOSCAR HAMMERSTEIN MUSEUM: $187,000 · OtherOSCAR HAMMERSTEIN MUSEUM+14 more: $30,050 · OtherUSA Triathlon Foundation: $240,000 · Recreation & SportsUSA Triathlon Founda…+1 more: $5,000 · Recreation & SportsJAMES A MICHENER ART MUSEUM: $235,000 · Arts & CultureJAMES A MICHENER AR…VETERINARY CARE FOUNDATION INCORPORATED: $20,000 · AnimalsThe Florida Aquarium Inc: $5,000 · AnimalsHEALTHY KIDS RUNNING SERIES: $1,813 · AnimalsBLESSINGS IN A BACKPACK INC: $10,000 · Human ServicesCOMMUNITY COORDINATED CHILD CARE INC: $5,000 · Human Services+1 more: $250 · Human ServicesAMERICAN CANCER SOCIETY INC: $7,450 · HealthTIM KERR CHARITIES INC: $5,000 · Philanthropy
Other$845,674Recreation & Sports$245,000Arts & Culture$235,000Animals$26,813Human Services$15,250Health$7,450Philanthropy$5,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE WETLANDS INSTITUTE: $318,500 over 9y, 3.6% of budgetUSA Triathlon Foundation: $240,000 over 4y, 2.6% of budgetJAMES A MICHENER ART MUSEUM: $235,000 over 9y, 1.0% of budgetVETERINARY CARE FOUNDATION INCORPORATED: $20,000 over 1y, 0.5% of budgetBLESSINGS IN A BACKPACK INC: $10,000 over 2y, 0.1% of budgetAMERICAN CANCER SOCIETY INC: $7,450 over 2y, 0.0% of budgetCOMMUNITY COORDINATED CHILD CARE INC: $5,000 over 1y, 0.2% of budgetThe Florida Aquarium Inc: $5,000 over 1y, 0.0% of budgetEverwalk: $5,000 over 1y, 2.8% of budgetTIM KERR CHARITIES INC: $5,000 over 4y, 0.9% of budgetDRESS FOR SUCCESS AUSTIN: $2,500 over 3y, 0.4% of budgetSPECIAL OLYMPICS PENNSYLVANIA INC: $2,000 over 1y, 0.0% of budgetHEALTHY KIDS RUNNING SERIES: $1,813 over 2y, 0.0% of budgetPhilabundance: $400 over 1y, 0.0% of budgetBUDS TO BLOSSOMS: $250 over 1y, 0.4% of budgetBest Buddies International Inc: $100 over 1y, 0.0% of budgetDONORSCHOOSEORG: $100 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, 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 COMMUNITY COORDINATED CHILD CARE INC ↗
  • Who funds The Florida Aquarium Inc ↗
  • Who funds Everwalk ↗
  • Who funds TIM KERR CHARITIES 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 ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Jpmorgan Chase Founda…National Philanthropi…The Bank of America C…Vanguard Charitable E…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Jpmorgan Chase FoundationNY9.9× affinity4 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

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

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization The Leff Family Foundation funds: left to right is the share of its income from government, bottom to top the share from The Leff Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 20%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →median 2%
  • 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
no gov moneyreceives it· size = income
2get no government money at all
4report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–15%
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 28 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Leff Family’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home