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New York · Private foundation

Thomas L Kempner Jr Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$12M
Granted FY2024(still arriving)
22
Grants FY2024
18
Organizations funded FY2023
17%
First-time grantees FY2023
Read the full brief
Median grant, FY2024
$250,000
Largest grant, FY2024
$3,235,000
Organizations funded a year
8 to 18
FY2019 to FY2023
States reached, FY2024
5
Total assets, FY2024
$326M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2023, 17% of the organizations Thomas L Kempner Jr Foundation funded were first-time grantees, receiving 9% of its grant dollars.

New vs renewed · share of each year

In FY2023, 91% of grant dollars renewed an existing relationship; $1.4M went to new ones.

50%100%’20’21’22’23
RenewedFirst-time

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

’20’21’22’23
HealthEnvironmentArts & CultureOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2024still arriving16$8.1M19%
FY202318$14M17%
FY202215$12M7%
FY202114$13M21%
FY20208$8.4M25%
FY201912$10Mn/a
99% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2024.

Recreation & Sports$25MPhilanthropy$20MHealth$14MEducation$9.5MArts & Culture$5.2MEnvironment$3.5MCommunity Improvement$3.3MAnimals$3.0MOther$0

Top grantees

Largest recipients by total granted, FY2019 to FY2024, and the share of each one’s budget the grants supplied at peak.

Show all 17 grantees
All grantees of Thomas L Kempner Jr Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Central Park Conservancy Inc$25,499,99968%
The Mount Sinai Hospital$10,000,00040%
American Museum of Natural History$3,250,00041%
Wildlife Conservation Society$3,050,00050%
Juilliard School$2,786,49141%
Open Space Institute Land Trust Inc$2,642,65542%
Planned Parenthood Federation of America Inc$2,500,00020%
Businesses United in Investing Lending & Development$2,050,00057%
Roundabout Theatre Company Inc$1,700,00033%
Transportation Alternatives Inc$1,200,00039%
Open Space Institute Inc$519,66018%
Peer Health Exchange Inc$475,00034%
Yale University$330,0004n/a
Rare$200,00011%
Yale University$120,0002n/a
Children's Hospital Corporation$100,00040%
The Philharmonic Symphony Society of Ny Inc$10,00010%

What it could do for these grantees

Plus 7 recipients with no EIN on record ($9.6M), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Thomas L Kempner Jr Foundation supplied at peak.

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetCentral Park Conservancy Inc: $25,499,999 over 6y, 8.2% of budgetThe Mount Sinai Hospital: $10,000,000 over 4y, 0.1% of budgetAmerican Museum of Natural History: $3,250,000 over 4y, 0.5% of budgetWildlife Conservation Society: $3,050,000 over 5y, 0.4% of budgetJuilliard School: $2,786,491 over 4y, 1.0% of budgetOpen Space Institute Land Trust Inc: $2,642,655 over 4y, 2.2% of budgetPlanned Parenthood Federation of America Inc: $2,500,000 over 2y, 0.3% of budgetBusinesses United in Investing Lending & Development: $2,050,000 over 5y, 7.5% of budgetRoundabout Theatre Company Inc: $1,700,000 over 3y, 3.0% of budgetTransportation Alternatives Inc: $1,200,000 over 3y, 9.1% of budgetOpen Space Institute Inc: $519,660 over 1y, 7.6% of budgetPeer Health Exchange Inc: $475,000 over 3y, 3.6% of budgetRare: $200,000 over 1y, 0.6% of budgetChildren's Hospital Corporation: $100,000 over 4y, 0.0% of budgetThe Philharmonic Symphony Society of Ny Inc: $10,000 over 1y, 0.0% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 15.

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.

American Online Giving Foundation IncDE8× affinity4 shared granteesties to 1 of 1Hover any node to trace its alignments.Compare side by side →

Open a dossier: American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund

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.

Compare Thomas L Kempner Jr Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Thomas L Kempner Jr Foundation?

Find your warmest path to Thomas L Kempner Jr 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.

About Thomas L Kempner Jr Foundation

How much does Thomas L Kempner Jr Foundation give?
Thomas L Kempner Jr Foundation reported 22 grants totaling $11,575,752 in its FY2024 IRS filing. It funded between 8 and 18 organizations a year over FY2019 to FY2023.
What does Thomas L Kempner Jr Foundation fund?
By grant dollars over FY2019 to FY2024, its largest causes are Recreation & Sports (29%), Philanthropy (23%), Health (16%).
Who are Thomas L Kempner Jr Foundation's largest grantees?
By total granted over FY2019 to FY2024: Central Park Conservancy Inc ($25M), The Mount Sinai Hospital ($10M), American Museum of Natural History ($3.3M).
Does Thomas L Kempner Jr Foundation fund new organizations?
In FY2023, 17% of the organizations it funded were first-time grantees.
Does Thomas L Kempner Jr Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Thomas L Kempner Jr Foundation?
Its strongest co-funders, measured against what their size predicts, include American Online Giving Foundation Inc, Fidelity Investments Charitable Gift Fund.
Where is Thomas L Kempner Jr Foundation based?
Thomas L Kempner Jr Foundation is based in NY.

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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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