· Private foundation
Naftali and Natalie Zanziper 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 FY2020–2024.
Where the money goes
Your grants by size, and where they go.
The 48 grants below total $1,143,795 — the rows itemised in this filing. The $2,019,314 headline is the total grant expense reported on the return, so the remaining $875,519 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.
By grant size · FY2023
- Under $10k25 grants · $80k
- $10k–50k13 grants · $330k
- $50k–250k10 grants · $734k
| Recipient | Amount |
|---|---|
| My Extended Family | $121,000 |
| Tzur Foundation | $91,800 |
| Torah Umesorah/National Society for Hebrew Day School | $90,000 |
| Jerusalem Open House | $69,806 |
| Bais Hamedrash Netzach Yisroel | $65,000 |
| Beth Medrash Ohr Chaim | $63,000 |
| Tomche Shabbos of Rockland County | $60,000 |
| Relief Resources Inc | $60,000 |
| Kupath Ezra of Rockland | $60,000 |
| Lehava- RCTT Reviving Communities Through Torah | $53,734 |
| Flatbush Community Fund | $45,000 |
| Mercava Inc | $37,500 |
| Tov V'chesed Foundation, Inc | $36,000 |
| IYYUN, inc | $30,500 |
| Cong Machon Tiferes Bachurim | $30,500 |
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 +24% since the first grant, against +7% for the ones you funded once.
45 repeat relationships — 32 still active in FY2023, 13 since wound down; 16 grantees were first funded in FY2023 (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 FY2023, 79% of grant dollars renewed an existing relationship; $237k 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
- TFTZUR FOUNDATION INC3× · 2021–2023 · $356k · revenue +63%
- MEMY EXTENDED FAMILY INC3× · 2021–2023 · $338k · revenue +60%
- TSTOMCHE SHABBOS OF ROCKLAND COUNTY INC3× · 2021–2023 · $190k · revenue +39%
Funded once
- BHBais Hamedrash Neitzach Yisroelone grant, 2021 · $48k
- NINYUN, Incone grant, 2022 · $36k
- CKCONG KEREN TOSFES YOM TOVone grant, 2021 · $30k
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.
Religious Teaching
Religious School
Ohr Yisrael is a religious institution that provides religious services and instruction to Rabbis and community members.
To provide financial support to the yeshiva knesseth yisroel institution, its rabbis, and students, and lend support to other religious institutions in israel and around the world, with the goal of furthering jewish values among the jewish…
publish religious books
To pursue a greater outreach of knowledge of the Jewish Torah and to further educate the less knowledgeable
To support and promote the study of torah (bible) among members of jewish faith worldwide.
For reference, the grantee most central to the portfolio’s shape is Ohel Childrens Home & Family Services Inc and the most unlike its peers is Camp Extreme D/B/a Project Extreme. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 14 years old; the field is 18. You back the younger end — and your money leans older still.
The field is 19% startups (under 5 years old) — 11% of your grantees by number, and just 2% of your money.
The orgs you fund almost never close — 2% lost their exemption, against 10% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
33 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. 33 of the 109 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 TZUR FOUNDATION INC ↗
- Who funds MY EXTENDED FAMILY INC ↗
- Who funds TOMCHE SHABBOS OF ROCKLAND COUNTY INC ↗
- Who funds RCTT REVIVING COMMUNITIES THROUGH TORAH ↗
- Who funds THE FLATBUSH COMMUNITY FUND INC co BERNATH & ROSENBERG PC ↗
- Who funds MERCAVA INC ↗
- Who funds HATZOLAH EMERGENCY AIR RESPONSE TEAM INC ↗
- Who funds RELIEF RESOURCES INC ↗
- Who funds THE ALEPH INSTITUTE INC ↗
- Who funds Bonei Olam Inc ↗
- Who funds A Torah Infertilty Medium Exchange ↗
- Who funds PROJECT INSPIRE INC ↗
- Who funds KIDS-N-CAMP FUND INC ↗
- Who funds CAMP EXTREME D/B/A PROJECT EXTREME ↗
- Who funds CHAI 4EVER INC ↗
- Who funds ADIN'S CLOSET 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: Simcha and Rachel Hyman Foundation · The Ojc Fund · Jewish Communal Fund · Jack Adjmi Family Foundation Inc · National Society for Hebrew Day Schools · The Weiskopf Family Foundation · Murray & Sydell Rosenberg Foundationinc · Bcg Charitable Foundation · The Nathan and Marilyn Silberman Fdn · Md Friedman Family Foundation · The Ohr Hakotel Foundation · Eisenberg Family Foundation Inc
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.
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How do I get to Naftali and Natalie Zanziper Foundation?
Find your warmest path to Naftali and Natalie Zanziper 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.