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The Mandelbaum Foundation at a glance

· Private foundation

The Mandelbaum Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$316k
Granted FY2024still arriving
8
Grants FY2024still arriving
3
States reached
$100k
Largest
01What it fundsRead
02Its fieldRead
03Through PlinthRead
01What it funds
0190% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2025.

Philanthropy$565kHealth$275kEducation$43kPublic Safety & Disaster$10kInternational$5kEmployment$2kCivil Rights$360Arts & Culture$300Other$0
02FY2024 · 8 grants

Where the money goes

Grants by size, and the largest recipients.

How this is measured
The 8 grants below total $161,810, the rows itemized in this filing. The $316,110 headline is the total grant expense on the return; the other $154,300 is giving the schedule does not break out (grants under the $5,000 itemization floor, grants to individuals, grants on other schedules). Every figure below describes the itemized rows only.

By grant size · FY2024

  • Under $10k4 grants · $2k
  • $10k–50k3 grants · $60k
  • $50k–250k1 grant · $100k
$10,000
Median grant
3
States reached
$766k
Total assets
Largest grants
RecipientAmount
Lymphoma Research Foundation$100,000
Albert Einstein College of Medicine$25,000
Trustees of Princeton University$25,000
THE Relief Foundation$10,000
Jo Ann Danzis Foundation$1,000
The National Council of Jewish Women$360
Livingston First Aid Squad$250
Sport Clube Portugues Inc$200
02Its 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
The Joanna Foundation
—
2
The Joanna Foundation
—
3
The Julian Reiss Foundation Inc
—
4
The Lichtenstein Family Foundation
Philanthropy
5
The Joanne E Masin Foundation
Philanthropy
6
Johnson & Johnson Foundation United States Inc
—
7
Dr Rene & Daisy Lim Foundation
Philanthropy
8
Lamrim Foundation
—
9
Saint Joseph's Foundation
—
10
Jack Joseph & Morton Mandel Foundation
Philanthropy
11
Louis a Sinsheimer Foundation
—
12
J Lieberman Family Foundation Inc
Philanthropy
How this is measured
The grantee most central to the portfolio’s shape is Icahn School of Medicine At Mount Sinai; the most unlike its peers is The Jo-Ann Danzis Foundation Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
03the grantee network

8 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. 8 of the 14 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)
0
Early backer (in before they grew)
8/8
Grantees still filing
6/8
Grew since first funded

Where the money sits, by cause and then by grantee

Albert Einstein College of Medicine: $125,000 · OtherAlbert Einstein College of MedicineTrustees of Princeton University: $25,000 · OtherTrustees of Princeton University+5 more: $2,910 · OtherLYMPHOMA RESEARCH FOUNDATION: $100,000 · HealthLYMPHOMA RESEARCH FOUNDATIONICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $50,000 · EducationICAHN SCHOOL OF MEDICI…THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $18,000 · EducationTHE TRUSTEES OF COLUMB…THE RELIEF FOUNDATION INC: $10,000 · Public Safety & DisasterOrphaned Starfish Foundation Inc: $5,000 · Human ServicesSAX CHARITABLE FOUNDATION INC: $1,000 · PhilanthropyJo Ann Danzis Foundation: $1,000 · Philanthropy
Other$152,910Health$100,000Education$68,000Public Safety & Disaster$10,000Human Services$5,000Philanthropy$2,000

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetLYMPHOMA RESEARCH FOUNDATION: $100,000 over 1y, 0.7% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $50,000 over 1y, 0.0% of budgetTHE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $18,000 over 1y, 0.0% of budgetTHE RELIEF FOUNDATION INC: $10,000 over 1y, 10% of budgetSAX CHARITABLE FOUNDATION INC: $1,000 over 1y, 0.7% of budgetJo Ann Danzis Foundation: $1,000 over 1y, 4.0% of budgetLIVINGSTON FIRST AID SQUAD INC: $250 over 1y, 0.2% 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.

03Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Mandelbaum Foundation?

Find your warmest path to The Mandelbaum Foundation 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 14 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Possibly out of date. A more recent filing (FY2025) is on record and reports $214k of grant expense with no grantee named in the published copy. A private foundation itemizes every grant it makes, so a return carrying none has filed its list as an attachment that the public copy does not include. The figures above are therefore from FY2024, the most recent year this funder’s grantee list reached the public record.

Source object · view filing

Play a game based on Mandelbaum’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