· Private foundation
Harry F Mariani Family 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 FY2021–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k6 grants · $14k
- $10k–50k5 grants · $84k
- $50k–250k3 grants · $174k
| Recipient | Amount |
|---|---|
| TISCH MULTIPLE SCLEROSIS RESEARCH CENTER NEW YORK INC | $68,000 |
| NORTHWELL HEALTH FOUNDATION | $56,000 |
| THE BEAUFORT COUNTY OPEN LAND TRUST INC | $50,000 |
| PINGREE SCHOOL | $27,000 |
| UNIVERSITY OF NOTRE DAME | $25,000 |
| THE DON MONTI MEMORIAL RESEARCH FOUNDATION | $12,000 |
| TULANE UNIVERSITY | $10,000 |
| COASTAL CONSERVATION ASSOCIATION SOUTH CAROLINA | $10,000 |
| ST JOSEPH'S CHILDREN'S HOSPITAL TAMPA | $4,000 |
| COMMUNITY DISPUTE SETTLEMENT CENTER | $3,000 |
| MINUTEMAN SENIOR SERVICES | $3,000 |
| NORTH CHARLESTON ANIMAL SOCIETY | $1,500 |
| LOWCOUNTRY FOOD BANK | $1,500 |
| ONE80 PLACE | $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 (FY21–25, $22k) land where the poverty rate runs at 8%, against an area that typically sits at 7%. 91% 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.
26 repeat relationships — 13 still active in FY2025, 13 since wound down.
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, 100% of grant dollars renewed an existing relationship; $0 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
THE PINGREE SCHOOL INC5× · 2021–2025 · $77k · revenue +26%- TDThe Don Monti Memorial Research Foundation Inc4× · 2021–2025 · $44k · revenue +28%
- TATHE ADMINISTRATORS OF THE TULANE EDUCATIONAL FUND3× · 2023–2025 · $30k · revenue +16%
Funded once
- SISea Island Habitat For Humanity Incgraduatedone grant, 2021 · $10k · revenue +74%
- FTFIRST TEE GREATER CHARLESTONgraduatedone grant, 2021 · $10k · revenue +312%
- BMBEAUFORT MEMORIAL HOSPITAL FOUNDATIONgraduatedone grant, 2023 · $10k · revenue +164%
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.
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…
Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.
Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.
Lenox hill hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future generations…
North shore university hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future…
South shore university hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future…
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
NHF supports, encourages and coordinates the development of comprehensive, integrated health care-related services for the advancement and well-being of the community, in furtherance of the purposes of Newport Hospital (see Schedule O)
Bon secours new york health system, inc. (bsnyhs) is the parent and central organization of an established integrated healthcare delivery system.
Lenox hill hospital medical, pc is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future…
Saint anselm is a catholic, benedictine college providing all of its students a distinctive liberal arts education that incorporates opportunities for professional and career preparation. it does so in a learning community that encourages…
Mercy Health will provide assistance, support and direction to all of the health care institutions and activities operated and maintained by its Subsidiaries. The mission of Mercy Health in performing these activities shall be to provide a…
For reference, the grantee most central to the portfolio’s shape is Youth Advocacy Foundation Inc and the most unlike its peers is University of Notre Dame du Lac. 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 47 years old; the field is 16. You back the established end — and your money leans older still.
The field is 22% 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.
29 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. 29 of the 38 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 TISCH MULTIPLE SCLEROSIS RESEARCH CENTER OF NEW YORK INC ↗
- Who funds NORTHWELL HEALTH FOUNDATION ↗
- Who funds BEAUFORT COUNTY OPEN LAND TRUST ↗
- Who funds University of Notre Dame du Lac ↗
- Who funds THE PINGREE SCHOOL INC ↗
- Who funds The Don Monti Memorial Research Foundation Inc ↗
- Who funds THE ADMINISTRATORS OF THE TULANE EDUCATIONAL FUND ↗
- Who funds COMMUNITY DISPUTE SETTLEMENT CENTER INC ↗
- Who funds TOMORROW'S HOPE FOUNDATION INC ↗
- Who funds LOWCOUNTRY FOOD BANK INC ↗
- Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC ↗
- Who funds Children's Hospital Corporation ↗
- Who funds CHARLESTON ANIMAL SOCIETY ↗
- Who funds THE HOWARD UNIVERSITY ↗
- Who funds MINUTEMAN SENIOR SERVICES INC ↗
- Who funds Sea Island Habitat For Humanity Inc ↗
- Who funds FIRST TEE GREATER CHARLESTON ↗
- Who funds BEAUFORT MEMORIAL HOSPITAL FOUNDATION ↗
- Who funds One-Eighty Place ↗
- Who funds YOUTH ADVOCACY FOUNDATION INC ↗
- Who funds Winchester Committee for A Better Chance ↗
- Who funds THE FENN SCHOOL ↗
- Who funds AMERICAN FRIENDS OF THE LONDON PHILHARMONIC ORCHESTRA INC ↗
- Who funds HEADING HOME INC ↗
- Who funds Williams College ↗
- Who funds PINK AID INC ↗
- Who funds ST FRANCIS FOOD PANTRIES AND SHELTERS INC ↗
- Who funds THIRD OPTION FOUNDATION ↗
- Who funds Neighbors Together 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: Banfi Vintners Foundation · Coastal Community Foundation of South Carolina Inc · Dominion Energy Charitable Foundation · Boston Foundation Inc · Morgan Stanley Global Impact Funding Trust Inc · Davis Family Foundation Inc · Analog Devices Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · National Philanthropic Trust · Jewish Communal Fund · Jpmorgan Chase Foundation · The Pfizer 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.
Government reliance of your grantees
Every dot is one organization Harry F Mariani Family 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, a single department, or state — and drag the year to watch it move.
- Minuteman Senior Services Inc — 73% of income from government
- Heading Home Inc — 17% of income from government
- Children's Hospital Corporation — 10% of income from government
- Youth Advocacy Foundation Inc — 1% of income from government
- Williams College — 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 Harry F Mariani Family Foundation?
Find your warmest path to Harry F Mariani Family 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.