· Private foundation
The Sidewater Family Foundation Inc
Its FY2025 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 FY2020–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k31 grants · $125k
- $10k–50k16 grants · $194k
| Recipient | Amount |
|---|---|
| LANKENAU MEDICAL CENTER FOUNDATION | $30,000 |
| THE JEWISH THEOLOGICAL SEMINARY | $15,000 |
| AMERICAN SOCIETY FOR YAD VASHEM | $15,000 |
| CHOP FOUNDATION | $12,000 |
| JEWISH RELIEF AGENCY | $12,000 |
| AMERICAN FRIENDS OF ISRAEL NAVY SEALS | $10,000 |
| AMERICAN FRIENDS OF THE HEBREW UNIVERSITY | $10,000 |
| AMERICAN FRIENDS OF MAGEN DAVID ADOM | $10,000 |
| WHYYPBS | $10,000 |
| JEWISH MUSEUM | $10,000 |
| AMERICAN FRIENDS OF NATAL INC | $10,000 |
| JEVS HUMAN SERVICES | $10,000 |
| GERMANTOWN FRIENDS SCHOOL | $10,000 |
| MOUNT SINAI HEALTH SYSTEM | $10,000 |
| JEWISH FEDERATION OF GREATER PHILADELPHIA | $10,000 |
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 (FY20–25, $108k) land where the poverty rate runs at 12%, against an area that typically sits at 12%. 44% of those dollars go to grantees based in above-average-need neighborhoods. Your grants spread fairly evenly across need levels.
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.
Which US states your grants reach
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 +24% since the first grant, against +6% for the ones you funded once.
72 repeat relationships — 36 still active in FY2025, 36 since wound down; 8 grantees were first funded in FY2025 (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 FY2025, 83% of grant dollars renewed an existing relationship; $50k 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
- LMLANKENAU MEDICAL CENTER FOUNDATION6× · 2020–2025 · $245k · revenue +56%
- AFAMERICAN FRIENDS OF MAGEN DAVID ADOM6× · 2020–2025 · $218k · revenue +198%
- JHJEVS HUMAN SERVICES5× · 2020–2025 · $60k · revenue +49%
Funded once
- CSCONGREGATION SHEARITH ISRAELone grant, 2022 · $10k
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAIone grant, 2024 · $10k · revenue 0%- SPSOUTHERN POVERTY LAW CENTER INCone grant, 2023 · $10k · revenue -12%
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.
Committed to exceptional healthcare quality for all and actively engaged with our community, einstein drives scientific discovery and educates compassionate leaders in health and science.
The jewish agency binds jews across ideologies and civilizations together in a worldwide jewish family with israel at its center. it provides the global framework for aliyah, ensures global jewish safety, strengthens jewish identity and…
See schedule othe organization is a not-for-profit, public charity established in 1911 to provide for the quality and continuity of jewish life in western new york and around the world through private philanthropy. the foundation seeks,…
The weizmann institute of science, located in rehovot, israel, is one of the worlds top-ranking, multidisciplinary research institutions. at any one time, several thousand scientists, staff and students are involved in hundreds of research…
Mjhs health system is a charitable not-for-profit established to support the activities of affiliated organizations. mjhs is built on the core values of compassion, dignity and respect, first established by the four brooklyn ladies in…
Based on jewish values, the jewish federation of greater los angeles convenes and leads the community and leverages its resources to assure the continuity of the jewish people, support a secure state of israel, care for jews in need here…
Minneapolis jewish federation is a nonprofit organization that promotes a culture of philanthropy, leverages resources to meet local and global jewish needs, and facilitates community planning to ensure a thriving and secure future.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Mount sinai is committed to the advancement of the art and science of medicine through clinical excellence. the central mission consists of high-quality patient care and teaching conducted in an atmosphere of social concern and scholarly…
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
The feinstein institute for medical research ("the institute") is the research branch of northwell health ("northwell"). through its affiliation with northwell, the institute's mission is to bridge the gap between biomedical research and…
For reference, the grantee most central to the portfolio’s shape is American Friends of Hebrew University Inc and the most unlike its peers is Save Lucy Committee Inc. 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 41 years old; the field is 19. You back the established end — and your money leans older still.
The field is 18% startups (under 5 years old) — 4% of your grantees by number, and just 1% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 9% 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.
56 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. 56 of the 102 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 LANKENAU MEDICAL CENTER FOUNDATION ↗
- Who funds AMERICAN FRIENDS OF MAGEN DAVID ADOM ↗
- Who funds JEWISH FEDERATION OF GREATER PHILADELPHIA ↗
- Who funds JEVS HUMAN SERVICES ↗
- Who funds JEWISH RELIEF AGENCY ↗
- Who funds AMERICAN FRIENDS OF ISRAELI NAVY SEALS INC ↗
- Who funds JEWISH FEDERATION OF SOUTH PALM BEACH COUNTY INC ↗
- Who funds Philabundance ↗
- Who funds PROJECT HOME ↗
- Who funds AMERICAN FRIENDS OF NATAL INC ↗
- Who funds FRIENDS OF UNITED HATZALAH INC ↗
- Who funds ROBIN HOOD FOUNDATION ↗
- Who funds CURTIS INSTITUTE OF MUSIC ↗
- Who funds AMERICAN SOCIETY FOR YAD VASHEM INC ↗
- Who funds ANTI-DEFAMATION LEAGUE ↗
- Who funds THE JEWISH MUSEUM ↗
- Who funds PHILADELPHIA MUSEUM OF ART ↗
- Who funds STROBIS GLAUCOMA FOUNDATION INC ↗
- Who funds THE ADMINISTRATORS OF THE TULANE EDUCATIONAL FUND ↗
- Who funds AMERICAN FRIENDS OF HEBREW UNIVERSITY INC ↗
- Who funds AMERICAN SOCIETY FOR TECHNION ISRAEL INSTITUTE OF TECHNOLOGY INC ↗
- Who funds JEWISH LEARNING VENTURE ↗
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: Tzedakah Foundation · The Saramar Charitable Fund · Daniel M Tabas Family Foundation · Erlbaum Family Foundation · Jewish Federation of Greater Philadelphia · The Jill and Mark Fishman Foundation · Georgejack & Joan Shuster Foundation Inc C/O Gail Norry · The Solomon & Sylvia Bronstein Fdn · Katz Family Charitable Trust · The Clayman Foundation · The Snider Foundation · Connelly Foundation
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 The Sidewater Family Foundation Inc 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.
- Fenway Community Health Center Inc — 27% of income from government
- Save Lucy Committee Inc — 11% of income from government
- Northeastern University — 7% of income from government
- Florida Sheriffs Association Inc — 4% 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 The Sidewater Family Foundation Inc?
Find your warmest path to The Sidewater Family 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.