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· Private foundation

Laurans a & Arlene H Mendelson Charitable Foundation Inc

Its FY2026 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$2.1M
Granted FY2025still arriving
32
Grants FY2025still arriving
12
States reached
$1.2M
Largest

Read this first · the figures below need context

81% of Laurans a & Arlene H Mendelson Charitable Foundation Inc’s FY2026 grant dollars went to The Trustees Of Columbia University In The City Of New York, not to grantees.

Its money now reaches organizations through that sponsor, which does not report who recommended each grant. FY2026 names 5 organizations directly, so a portfolio cannot be read from it. Everything below is therefore FY2025, the last year Laurans a & Arlene H Mendelson Charitable Foundation Inc named its own grantees at scale: 12 organizations, $2M. It is dated, not current.

Organizations named directly on the return

3
’17
4
’18
7
’19
9
’20
7
’21
14
’22
15
’23
15
’24
12
’25
5
’26

Amber years are those where most dollars went to a sponsor.

01What it funds
01100% 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$4.0MHealth$1.4MPhilanthropy$1.3MEducation$1.2MCivil Rights$150kReligion$125kInternational$95kHuman Services$10kOther$0
02FY2025 · 32 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k17 grants · $14k
  • $10k–50k8 grants · $95k
  • $50k–250k6 grants · $750k
  • $250k+1 grant · $1.2M
$6,000
Median grant
12
States reached
$182k
Total assets

Anchored by a single position: about 100% of reported assets are held in Heico Corp Common New.

Largest grants
RecipientAmount
INSTITUTE OF CONTEMPORY ART$1,209,452
BAPTIST HEALTH SO FLA$200,000
UM MILLER SCHOOL OF MEDICINE$200,000
GREATER MIAMI JEWISH FEDERATION$100,000
UNITED WAY OF MIAMI DADE$100,000
FLORIDA GRAND OPERA$100,000
SOUTH FLORIDA PBS$50,000
KRAFT CENTER FOR JEWISH LIFE$25,000
AMER FRIENDS OF SHEBA MEDICAL CTN$10,000
INSTITURE FOR JEWISH STUDIES$10,000
AMER FRIENDS OF MAGEN DAVID ADOM$10,000
AMER COMMITTEE FOR WEIZMANN INSTIT$10,000
FOUNDATION FOR JEWISH CAMPUS LIFE$10,000
DANIELS MUSIC FOUNDATION$10,000
AMERICAN JEWISH COMMITTEE$10,000
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 (FY21–22, $10k) land where the poverty rate runs at 17%, against an area that typically sits at 12%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 12%BOYS TOWN: $100 → 12%SELF HELP COMMUNITY SERVICE: $10k → 17%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

MN
IL
NY
MA
OH
NJ
CA
NE
WV
VA
MD
AZ
KS
TN
DC
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.
04

Where the work is directed

The same grants placed two ways: where each recipient sits, and where its stated purpose sends the money.

About 12% of Laurans a & Arlene H Mendelson Charitable Foundation Inc’s grant dollars are earmarked for a different county than the recipient’s own address. By recipient address, 82% of the giving stays in FL; by stated purpose, 79%.

Laurans a & Arlene H Mendelson Charitable Foundation Inclessmore of its giving
Placed by recipient address · 3.9% directed abroad (not shown)
How this is measured
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the funder’s own 990 grant descriptions.
03Its grantees
repeat funding

Who it funds again

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

95%of every dollar goes to organizations it has funded before.
$6.0M · 35 repeat orgs$321k to everyone else

Grantees it renews have grown median revenue +39% since the first grant, against +19% for those funded once.

35 repeat relationships: 20 still active in FY2025, 15 since wound down; 12 grantees were first funded in FY2025 (too recent to call). Read against FY2025, the last year this funder named its own grantees directly; its giving has since run through a sponsor, which reports no donor behind each grant.

How the two cohorts compare

Re-uppedFunded once

Organizations

35
19

Total granted

$6.0M
$30k

Median revenue growth · since first grant

+39%
+19%

Still filing today

46%
42%

New vs renewed · share of each year

In FY2026, 84% of grant dollars renewed an existing relationship; $58k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25’26
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25’26
Arts & CultureHealthInternationalHuman ServicesPublic BenefitEnvironmentOther
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

  • SOUTH FLORIDA PBS INC
    8× · 2019–2026 · $270k · revenue +46%
  • RE
    RANSOM EVERGLADES SCHOOL INC
    2× · 2019–2020 · $200k · revenue +61%
  • AMERICAN JEWISH COMMITTEE
    6× · 2019–2025 · $150k · revenue +39%

Funded once

  • SC
    SELFHELP COMMUNITY SERVICES INCgraduated
    one grant, 2022 · $10k · revenue +26%
  • IF
    INSTITUTE FOR ISRAEL AND JEWISH STU
    one grant, 2022 · $10k
  • BB
    BISCAYNE BAY WATERKEEPER INCgraduated
    one grant, 2023 · $5k · revenue +26%
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
New York University

Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes. nyu's primary missions are education, research and scholarship, and patient care.

Education
2
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
3
Memorial Sloan-Kettering Cancer Center

Leadership in the prevention, treatment, and cure of cancer through excellence, vision and cost effectiveness in patient care, outreach programs, research, and education.

Health
4
New York Genome Center Inc

Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.

Health
5
Aim At Melanoma

Aim at melanoma (aim) is globally engaged and locally invested in advancing the battle against melanoma through innovative research, legislative reform, education, and patient and caregiver support. founded in 2004, aim at melanoma is the…

Health
6
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
7
Dana-Farber Cancer Institute Inc

The mission of dfci is to provide expert, compassionate, and equitable care to children, adults, and their families, while advancing the understanding, diagnosis, treatment, cure, and prevention of cancer and related diseases. we train new…

Health
8
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation

The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.

Science & Tech
9
Washington Monthly Institute

Dedicated to increasing public knowledge through washington monthly magazine and website www.washingtonmonthly.com published since 1969, the print magazine is the country's most important watchdog of american government, focusing on what's…

Social Science
10
The Jewish Museum

The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.

Arts & Culture
11
The Johns Hopkins Hospital

For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…

Health
12
Yeshiva University

The university is composed of several colleges and schools providing undergraduate, graduate, professional and post-doctoral education and training and research and clinical programs.

Education
How this is measured
The grantee most central to the portfolio’s shape is The Heritage Foundation; the most unlike its peers is Father Flanagan's Boys' Home. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
05the grantee network

31 grantees tracked through their own filings, 2017–2026.

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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 31 of the 71 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)
2
Early backer (in before they grew)
31/31
Grantees still filing
22/31
Grew since first funded

Where the money sits, by cause and then by grantee

INSTITUTE OF CONTEMPORY ART: $3,271,520 · OtherINSTITUTE OF CONTEMPORY ARTMT SINAI MEDICAL CENTER: $801,605 · OtherMT SINAI MEDICAL CENTERBAPTIST HEALTH SO FLA: $405,000 · OtherBAPTIST HEALTH SO FLAUM MILLER SCHOOL OF MEDICINE: $200,000 · Other+51 more: $284,181 · Other+51 moreTHE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $2,037,072 · EducationTHE TRUSTEES OF COLUMBIA …RANSOM EVERGLADES SCHOOL INC: $200,000 · EducationRANSOM EVERGLADES SCHOOL …UNITED WAY MIAMI INC: $1,009,075 · PhilanthropyUNITED WAY MIAMI IN…GREATER MIAMI JEWISH FEDERATION INC: $741,660 · PhilanthropyGREATER MIAMI JEWIS…+1 more: $6,220 · PhilanthropyFLORIDA GRAND OPERA INC: $510,671 · Arts & CultureFLORIDA G…SOUTH FLORIDA PBS INC: $270,214 · Arts & CultureSOUTH FLO…DANIEL'S MUSIC FOUNDATION: $80,136 · Arts & CultureDANIEL'S …+4 more: $4,140 · Arts & CultureAMERICAN JEWISH COMMITTEE: $150,026 · Civil RightsBIRTHRIGHT ISRAEL FOUNDATION: $74,958 · International+1 more: $25 · InternationalHILLEL THE FOUNDATION FOR JEWISH CAMPUS LIFE: $29,998 · Religion
Other$4,962,306Education$2,237,072Philanthropy$1,756,955Arts & Culture$865,161Civil Rights$150,026International$74,983Religion$29,998

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $2,037,072 over 5y, 0.0% of budgetUNITED WAY MIAMI INC: $1,009,075 over 10y, 0.2% of budgetGREATER MIAMI JEWISH FEDERATION INC: $741,660 over 7y, 0.2% of budgetFLORIDA GRAND OPERA INC: $510,671 over 9y, 24% of budgetSOUTH FLORIDA PBS INC: $270,214 over 8y, 0.3% of budgetRANSOM EVERGLADES SCHOOL INC: $200,000 over 2y, 0.2% of budgetAMERICAN JEWISH COMMITTEE: $150,026 over 6y, 0.1% of budgetDANIEL'S MUSIC FOUNDATION: $80,136 over 7y, 1.5% of budgetBIRTHRIGHT ISRAEL FOUNDATION: $74,958 over 3y, 0.0% of budgetHILLEL THE FOUNDATION FOR JEWISH CAMPUS LIFE: $29,998 over 3y, 0.0% of budgetSELFHELP COMMUNITY SERVICES INC: $10,012 over 1y, 0.0% of budgetTHE MIAMI FOUNDATION INC: $6,220 over 4y, 0.0% of budgetBISCAYNE BAY WATERKEEPER INC: $5,000 over 1y, 0.1% of budgetST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $2,100 over 3y, 0.0% of budgetThe United States Holocaust Memorial Museum: $2,000 over 4y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $1,430 over 7y, 0.0% of budgetAMERICAN CANCER SOCIETY INC: $650 over 4y, 0.0% of budgetINTERNATIONAL FELLOWSHIP OF CHRISTIANS & JEWS INC: $550 over 4y, 0.0% of budgetWHITNEY MUSEUM OF AMERICAN ART: $530 over 4y, 0.0% of budgetMiami Rescue Mission Inc: $501 over 5y, 0.0% of budgetAmerican Heart Association Inc: $500 over 5y, 0.0% of budgetAMERICAN KIDNEY FUND INC: $406 over 2y, 0.0% of budgetLeadership Institute: $400 over 3y, 0.0% of budgetMuseum of Modern Art: $180 over 1y, 0.0% of budgetTHE BLEXIT FOUNDATION INC: $104 over 1y, 0.0% of budgetFather Flanagan's Boys' Home: $100 over 1y, 0.0% of budgetTHE HERITAGE FOUNDATION: $100 over 1y, 0.0% of budgetBLOOD CANCER UNITED INC: $100 over 1y, 0.0% of budgetJUDICIAL WATCH INC: $35 over 1y, 0.0% of budgetOPERATION SMILE INC: $25 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 TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK ↗
  • Who funds UNITED WAY MIAMI INC ↗
  • Who funds GREATER MIAMI JEWISH FEDERATION INC ↗
  • Who funds FLORIDA GRAND OPERA INC ↗
  • Who funds SOUTH FLORIDA PBS INC ↗
  • Who funds RANSOM EVERGLADES SCHOOL INC ↗
  • Who funds AMERICAN JEWISH COMMITTEE ↗
  • Who funds DANIEL'S MUSIC FOUNDATION ↗
  • Who funds BIRTHRIGHT ISRAEL FOUNDATION ↗
  • Who funds HILLEL THE FOUNDATION FOR JEWISH CAMPUS LIFE ↗
  • Who funds SELFHELP COMMUNITY SERVICES INC ↗
  • Who funds THE MIAMI FOUNDATION INC ↗
  • Who funds BISCAYNE BAY WATERKEEPER INC ↗
  • Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC ↗
  • Who funds The United States Holocaust Memorial Museum ↗
  • Who funds METROPOLITAN MUSEUM OF ART ↗

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.

The Florman Family Foundation IncFL13.6× affinity4 shared granteesties to 7 of 7Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Florman Family Foundation Inc · The Bank of America Charitable Foundation Inc · National Philanthropic Trust · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · American Online Giving Foundation 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 Laurans a & Arlene H Mendelson Charitable Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Laurans a & Arlene H Mendelson Charitable Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%2%6%14%25%funder's share of their income ↑0%6%13%19%25%share of the org’s income from government →median 19%
  • United Way Miami Inc: 23% of income from government
  • Biscayne Bay Waterkeeper Inc: 19% of income from government
  • South Florida Pbs Inc: 0% of income from government
no gov moneyreceives it· size = income
1get no government money at all
9report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–25%
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.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Laurans a & Arlene H Mendelson Charitable Foundation Inc?

Find your warmest path to Laurans a & Arlene H Mendelson Charitable Foundation Inc through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

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 71 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

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