· Private foundation
Sam and Kate Sidewater Foundation
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 $10k33 grants · $42k
- $10k–50k1 grant · $11k
- $50k–250k2 grants · $100k
| Recipient | Amount |
|---|---|
| COMMUNITY COLLEGE OF PHILADELPHIA | $50,000 |
| CURTIS INSTITUTE OF MUSIC | $50,000 |
| SCHEIE EYE INSTITUTE | $11,000 |
| CONGREGATION OF RODEPH SHALOM | $8,550 |
| CHILDREN'S HOSPITAL OF PHILADELPHIA | $5,000 |
| BOCA RATON REGIONAL HOSPITAL | $5,000 |
| FRIENDS OF CENTRAL SCHOOL | $3,000 |
| THE BARNES FOUNDATION | $2,500 |
| PENN STATE WRESTLING TEAM | $1,500 |
| WHYY PUBLIC BROADCASTING | $1,500 |
| KLEINLIFE | $1,500 |
| ST BRIDGET'S ROMAN CATHOLIC CHURCH | $1,500 |
| FRIENDS OF RITTENHOUSE SQUARE | $1,000 |
| DOCTORS WITHOUT BORDERS | $1,000 |
| AMERICAN ASSOCIATION OF CAREGIVING | $1,000 |
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, $6k) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 56% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-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.
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.
51 repeat relationships — 17 still active in FY2025, 34 since wound down; 19 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, 17% of grant dollars renewed an existing relationship; $126k 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
- TCTHE CHILDREN'S HOSPITAL OF PHILADELPHIA5× · 2020–2025 · $18k · revenue +59%
FRIENDS OF RITTENHOUSE SQUARE6× · 2020–2025 · $12k · revenue +169%
Philabundance4× · 2020–2023 · $10k · revenue +0%
Funded once
- SESheie Eye Instituteone grant, 2021 · $8k
- UOUNIVERSITY OF PAone grant, 2022 · $5k
- PHPROJECT HOMEone grant, 2020 · $3k · revenue -1%
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.
Sanford burnham prebys medical discovery institute's mission is to advance the biomedical sciences by cultivating the next generation of scientific leaders, providing meaningful opportunities for researchers of all backgrounds to learn,…
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.
Drexel university fulfills its founder's vision of preparing each new generation of students for productive professional and civic lives while also focusing its collective expertise on solving society's greatest problems. drexel is an…
Leadership in the prevention, treatment, and cure of cancer through excellence, vision and cost effectiveness in patient care, outreach programs, research, and education.
For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…
The hugo w. moser research institute at kennedy krieger, inc. (the "research institute") is an internationally recognized research facility finding answers to problems and injuries that affect a child's developing brain. researchers have…
We educate the next generation of leaders to improve the health of our society.
Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.
The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.
Please see schedule o
Fred hutch cancer center ("fred hutch") unites innovative research and compassionate care to prevent and eliminate cancer and infectious disease. continued on schedule o
To cure cf and provide all people with cf the opportunity to lead long, fulfilling lives by funding research and drug development, partnering with the cf community, and advancing high-quality, specialized care.
For reference, the grantee most central to the portfolio’s shape is Parkinson's Foundation Inc and the most unlike its peers is Humane World for Animals Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 51 years old; the field is 15. You back the established end — and your money leans older still.
The field is 21% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 13% 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.
42 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. 42 of the 103 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 COMMUNITY COLLEGE OF PHILADELPHIA FOUNDATION ↗
- Who funds CURTIS INSTITUTE OF MUSIC ↗
- Who funds THE CHILDREN'S HOSPITAL OF PHILADELPHIA ↗
- Who funds FRIENDS OF RITTENHOUSE SQUARE ↗
- Who funds Philabundance ↗
- Who funds WHYY INC ↗
- Who funds TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds INDEPENDENCE HISTORICAL TRUST ↗
- Who funds Boca Raton Regional Hospital Inc ↗
- Who funds PHILADELPHIA MUSEUM OF ART ↗
- Who funds WEITZMAN NATIONAL MUSEUM OF AMERICAN JEWISH HISTORY ↗
- Who funds THE GESU SCHOOL INC ↗
- Who funds UNITED WAY OF GREATER PHILADELPHIA AND SOUTHERN NEW JERSEY ↗
- Who funds THE MICHAEL J FOX FOUNDATION FOR PARKINSON'S RESEARCH ↗
- Who funds Humane World for Animals Inc ↗
- Who funds AMERICAN CANCER SOCIETY INC ↗
- Who funds JUDITH CREED HORIZONS FOR ACHIEVING INDEPENDENCE ↗
- Who funds THE BARNES FOUNDATION ↗
- Who funds PROJECT HOME ↗
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: The Philadelphia Foundation · The Saramar Charitable Fund · Henry Dolfinger 2 Trust Uw · The Snider Foundation · Jewish Federation of Greater Philadelphia · The Schwartz Creed Foundation · The Forman Family Foundation · The Honickman Foundation · Daniel M Tabas Family Foundation · The Neubauer Family Foundation · Connelly Foundation · The William Penn 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 Sam and Kate Sidewater 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.
- South Florida Pbs Inc — 0% 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 Sam and Kate Sidewater Foundation?
Find your warmest path to Sam and Kate Sidewater 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.