· 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.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2019–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k1 grant · $5k
- $10k–50k2 grants · $65k
- $50k–250k8 grants · $1.1M
- $250k+11 grants · $10M
| Recipient | Amount |
|---|---|
| JEWISH COMMUNAL FUND | $3,235,000 |
| MOUNT SINAI HOSPITAL | $2,000,000 |
| PLANNED PARENTHOOD FEDERATION OF AMERICA INC | $1,250,000 |
| WILDLIFE CONSERVATION SOCIETY | $1,000,000 |
| HARLEM VILLAGE ACADEMIES | $944,000 |
| OPEN SPACE INSTITUTE INC | $519,660 |
| TRANSPORTATION ALTERNATIVES INC | $400,000 |
| BUSINESSES UNITED IN INVESTING LENDING AND DEVELOPMENT | $350,000 |
| HARVARD BUSINESS SCHOOL | $250,000 |
| ACHIEVEMENT FIRST CHARTER SCHOOL | $250,000 |
| AMERICAN MUSEUM OF NATURAL HISTORY | $250,000 |
| RARE INC | $200,000 |
| Individual grant recipient | $175,425 |
| CENTRAL PARK CONSERVANCY | $166,667 |
| TIDES CENTER | $150,000 |
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 (FY22–24, $510k) land where the poverty rate runs at 10%, against an area that typically sits at 11%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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.
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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +31% since the first grant, against +18% for the ones you funded once.
19 repeat relationships — 13 still active in FY2024, 6 since wound down; 3 grantees were first funded in FY2024 (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 FY2024, 90% of grant dollars renewed an existing relationship; $810k 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
- CPCENTRAL PARK CONSERVANCY INC6× · 2019–2024 · $25M · revenue +163%
- TMTHE MOUNT SINAI HOSPITAL4× · 2021–2024 · $10M · revenue +31%
- AMAmerican Museum of Natural History4× · 2019–2024 · $3.3M · revenue +13%
Funded once
- TNTHE NEW YORK COMMUNITY TRUST - ECAP NYCone grant, 2020 · $250k
- TPTHE PHILHARMONIC SYMPHONY SOCIETY OF NY INCone grant, 2023 · $10k · revenue +18%
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.
Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…
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.
The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.
To educate students to be ethical and socially responsible leaders in a global community.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Undergraduate, graduate, and professional education and research across a broad array of academic domains.
The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…
(see schedule o)
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
University of the sciences prepares students to become leaders, innovators, and skilled practitioners in the sciences, the health professions, and related disciplines. we deliver excellence in teaching, research, and service through a safe…
The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.
New york school of interior design provides the most innovative, immersive, and transformative interior design education in the world, demonstrating the impact of professionally designed interiors on the health, happiness, and well-being…
For reference, the grantee most central to the portfolio’s shape is The Mount Sinai Hospital and the most unlike its peers is Wildlife Conservation Society. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
19 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. 19 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 CENTRAL PARK CONSERVANCY INC ↗
- Who funds JEWISH COMMUNAL FUND ↗
- Who funds THE MOUNT SINAI HOSPITAL ↗
- Who funds American Museum of Natural History ↗
- Who funds Wildlife Conservation Society ↗
- Who funds JUILLIARD SCHOOL ↗
- Who funds OPEN SPACE INSTITUTE LAND TRUST INC ↗
- Who funds PLANNED PARENTHOOD FEDERATION OF AMERICA INC ↗
- Who funds BUSINESSES UNITED IN INVESTING LENDING & DEVELOPMENT ↗
- Who funds ROUNDABOUT THEATRE COMPANY INC ↗
- Who funds TRANSPORTATION ALTERNATIVES INC ↗
- Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
- Who funds OPEN SPACE INSTITUTE INC ↗
- Who funds TIDES CENTER ↗
- Who funds PEER HEALTH EXCHANGE INC ↗
- Who funds RARE ↗
- Who funds THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK ↗
- Who funds Children's Hospital Corporation ↗
- Who funds THE PHILHARMONIC SYMPHONY SOCIETY OF NY INC ↗
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: American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund
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 Thomas L Kempner Jr 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 or a single department — and drag the year to watch it move.
- Children's Hospital Corporation — 10% 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.
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.