· Private foundation
John & Joan D'Addario 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 FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k20 grants · $56k
- $10k–50k8 grants · $90k
- $50k–250k1 grant · $50k
| Recipient | Amount |
|---|---|
| MUSICAL INSTRUMENT MUSEUM | $50,000 |
| MIDORI & FRIENDS | $20,000 |
| NORTHWELL HEALTH FOUNDATION | $10,000 |
| PROVIDENCE HOUSE | $10,000 |
| ROSIE'S HOUSE | $10,000 |
| LEAD GUITAR | $10,000 |
| ST FRANCIS HOSPITAL FOUNDATION | $10,000 |
| PHOENIX CONSERVATORY OF MUSIC | $10,000 |
| GUILD HALL OF EAST HAMPTON | $10,000 |
| PECONIC BAY MEDICAL CENTER | $6,000 |
| THE METROPOLITAN MUSEUM OF ART | $5,000 |
| HONOR HEALTH FOUNDATION | $5,000 |
| HARMONY PROJECT PHOENIX | $5,000 |
| UNIVERSITY OF ARIZONA FOUNDATION | $5,000 |
| Individual grant recipient | $4,500 |
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 (FY17–25, $80k) land where the poverty rate runs at 14%, against an area that typically sits at 11%. 51% 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.
53 repeat relationships — 24 still active in FY2025, 29 since wound down; 5 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, 95% of grant dollars renewed an existing relationship; $10k 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
- MIMUSICAL INSTRUMENT MUSEUM8× · 2017–2025 · $345k · revenue +84%
- RHRosies House A Music Academy for Children Inc9× · 2017–2025 · $220k · revenue +195%
- PCPOTSDAM COLLEGE FOUNDATION INC4× · 2019–2022 · $100k · revenue +9%
Funded once
- SISOCIAL INSTRUMENT MUSEUMone grant, 2022 · $25k
- AMARIZONA MUSICFEST INCgraduatedone grant, 2017 · $20k · revenue +225%
- MMUSIKFESTone grant, 2017 · $8k
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.
Manhattan school of music is deeply committed to excellence in education, performance, and creative activity; to the humanity of the school's environment; and to the cultural enrichment of the larger community. a premiere international…
The general purpose of the organization is to promote chamber music concerts to the general public.
Kaufman music center stimulates appreciation of and participation in music through music performance and education in ways that awaken creativity, advance innovation, and create a sense of wonder among performers, students, teachers, and…
The music institute of chicago ("music institute") leads people toward a lifelong engagement with music, by providing widely accessible resources for high quality music teaching, performing, and service activities.
Merit School of Music is dedicated to helping young people transform their lives by removing barriers to high-quality music education, with the majority of students benefitting from need-based financial aid, scholarship support, or…
The cleveland institute of music's mission is to empower the world's most talented classical music students to fulfill their dreams and potential.
Our mission is to establish the musical arts as a more essential and valuable experience in the lives of the general public. Our Access to Music program brings classical music to a new broad audience through free concerts events and…
To provide music education to underserved chicago public school students, sparking creativity and passion, teaching critical thinking, supporting academic achievement, and enriching young lives. foundations of music provides free…
The David Hochstein Memorial Music School, Inc. provides people of all ages, backgrounds, and abilities with access to excellent music and dance education in a community that nurtures and encourages personal achievement.
For reference, the grantee most central to the portfolio’s shape is Jazz in Arizona Inc and the most unlike its peers is Dan Murphy Foundation. 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 28 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) — 6% of your grantees by number, and just 26% 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.
59 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. 59 of the 105 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 MUSICAL INSTRUMENT MUSEUM ↗
- Who funds THE MIDORI FOUNDATION INC ↗
- Who funds Rosies House A Music Academy for Children Inc ↗
- Who funds POTSDAM COLLEGE FOUNDATION INC ↗
- Who funds PHOENIX CONSERVATORY OF MUSIC ↗
- Who funds METROPOLITAN MUSEUM OF ART ↗
- Who funds University of Arizona Foundation ↗
- Who funds PROVIDENCE HOUSE INC ↗
- Who funds VANDERCOOK COLLEGE OF MUSIC ↗
- Who funds SCO FAMILY OF SERVICES ↗
- Who funds ST FRANCIS HOSPITAL FOUNDATION INC ↗
- Who funds Long Island Alzheimers and Dementia Center Inc ↗
- Who funds GUILD HALL OF EAST HAMPTON INC ↗
- Who funds ARIZONA MUSICFEST INC ↗
- Who funds LEAD GUITAR ↗
- Who funds PROJECT ALS INC ↗
- Who funds NORTHWELL HEALTH FOUNDATION ↗
- Who funds UNITED SOUND INC ↗
- Who funds HARMONY PROJECT PHOENIX ↗
- Who funds OMNI FOUNDATION ↗
- Who funds HONORHEALTH FOUNDATION ↗
- Who funds IMPRINTS OF HONOR ↗
- Who funds Phoenix Children's Hospital Foundation ↗
- Who funds THE PERLMAN MUSIC PROGRAM INC ↗
- Who funds THE SOUTHAMPTON HOSPITAL FOUNDATION INC ↗
- Who funds MEDICAL MUSICIAN INITIATIVE INC ↗
- Who funds Long Island Cares Inc ↗
- Who funds THE MR HOLLAND'S OPUS FOUNDATION ↗
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: D'Addario Foundation Inc · Arizona Community Foundation · Thunderbirds Charities · Virginia G Piper Charitable Trust · The New York Community Trust · James & Janet Daddario Family Foundation Inc · The William and Joanne Moeller Foundation · Scottsdale Arts · American Express Foundation · Lostritto Family Foundation · The Cma Foundation · Jewish Community Foundation of Greater Phoenix
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 John & Joan D'Addario 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.
- Boston Music Project Inc — 9% 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 John & Joan D'Addario Foundation Inc?
Find your warmest path to John & Joan D'Addario 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.