· Private foundation
The per and Astrid Heidenreich 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 clustered by its grantee’s IRS cause code (NTEE), by year — across FY2020–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k40 grants · $97k
- $10k–50k16 grants · $234k
- $50k–250k8 grants · $752k
| Recipient | Amount |
|---|---|
| FAU FOUNDATION INC | $130,000 |
| BOYS AND GIRLS CLUB OF GREENWICH | $129,000 |
| LET'S GET READY | $100,000 |
| NORWALK ACTS | $100,000 |
| THE CARVER FOUNDATION | $100,000 |
| BANNER LAKE CLUB INC | $82,500 |
| SOUTHERN CONNECTICUT STATE UNIVERSITY | $60,000 |
| NORWALK HOSPITAL FOUNDATION | $50,000 |
| LEAP INC | $25,000 |
| FAMILY AND CHILDREN'S AGENCY | $25,000 |
| HORIZONS GREENS FARM ACADEMY | $20,000 |
| BOYS AND GIRLS CLUB OF MARTIN COUNTY | $20,000 |
| STAMFORD HOSPITAL FOUNDATION | $20,000 |
| MYSTIC AQUARIUM | $19,100 |
| TEACH FOR AMERICA | $15,000 |
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, $342k) land where the poverty rate runs at 9%, against an area that typically sits at 9%. 2% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +15% since the first grant, against +12% for the ones you funded once.
70 repeat relationships — 45 still active in FY2025, 25 since wound down; 18 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, 79% of grant dollars renewed an existing relationship; $225k 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
- TBTHE BANNER LAKE CLUB INC3× · 2023–2025 · $238k · revenue +22%
- BGBOYS & GIRLS CLUB OF GREENWICH3× · 2020–2025 · $213k · revenue +222%
- PLPROJECT LIFT INC2× · 2022–2025 · $135k · revenue +26%
Funded once
- NPNORWALK PUBLIC SCHOOLSone grant, 2020 · $125k
- MLMARC LUSTGARTEN PANCREATIC CANCER FOUNDATIONone grant, 2022 · $101k
- MSMEMORIAL SLOAN KETTERINGone grant, 2022 · $100k
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…
The bridge academy, inc. was granted a charter to operate the bridge academy, a public school located in the city of bridgeport, ct. the school was founded in 1997 to provide college preparatory curriculum designed to overcome the…
Cold spring school challenges children to become self-reliant, curious and resourceful problem solvers with the academic and social skills to engage constructively and ethically in our diverse, changing world.
The stamford charter school for excellence prepares young people in stamford, connecticut to compete for admission to and succeed in top public, private and parochial high schools by cultivating their intellectual, artistic, social,…
Brunswick school, inc. is a day school for boys in pre-kindergarten through twelfth grade. the purpose of the school is to educate the "whole boy". it does so by helping boys and young men - without regard to culture, ethnicity or religion…
Protect Connecticuts farmland for agricultural use by purchasing and accepting donations of agricultural conservation easements
Connecticut public broadcasting, inc. will inform, educate and inspire the people of connecticut, connecting and empowering the people of ct through outstanding journalism, storytelling, education and experiences, to make our state a more…
To build the university of the future with a strategy propelling us from our storied past toward an ambitious, inclusive & innovative future by preparing graduates as enlightened global citizens equipped for the challenges & opportunities…
The new england air museum's mission is to preserve and present the story of aviation and aerospace, with an emphasis on new england's role, and the genius and inspiration that made it possible. the museum also seeks to inspire young…
To improve the world through research, scholarship, education, preservation, and practice.
The mission of south shore charter school is to cultivate students the tenacity, integrity, and curiosity needed to become innovative and socially responsible leaders, ready to face and solve the ever-changing challenges facing our…
To provide funds to benefit families affected by cancer and to support cancer research and education.
For reference, the grantee most central to the portfolio’s shape is Norwalk Acts Inc and the most unlike its peers is Days for Girls International. 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 34 years old; the field is 17. You back the established end — and your money leans older still.
The field is 20% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 1% lost their exemption, against 12% 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.
80 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. 80 of the 137 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 FLORIDA ATLANTIC UNIVERSITY FOUNDATION INC ↗
- Who funds THE BANNER LAKE CLUB INC ↗
- Who funds BOYS & GIRLS CLUB OF GREENWICH ↗
- Who funds THE CARVER INC ↗
- Who funds LET'S GET READY INC ↗
- Who funds PROJECT LIFT INC ↗
- Who funds FAMILY & CHILDREN'S AGENCY INC ↗
- Who funds NORWALK ACTS INC ↗
- Who funds BOYS & GIRLS CLUB OF MARTIN COUNTY ↗
- Who funds Teach for America Inc ↗
- Who funds Norwalk Hospital Foundation ↗
- Who funds HOPE RURAL SCHOOL INC ↗
- Who funds LOBLOLLY COMMUNITY FOUNDATION INC ↗
- Who funds CMA EDUCATION FOUNDATION INC ↗
- Who funds THE MATTHEW GAFFNEY FOUNDATION ↗
- Who funds STAMFORD PUBLIC EDUCATION FOUNDATION INC ↗
- Who funds HOBE SOUND COMMUNITY CHEST INC ↗
- Who funds DELMAR FARM SANCTUARY INC ↗
- Who funds CARDINAL QUARTERBACK CLUB INC ↗
- Who funds GREENWICH ALLIANCE FOR EDUCATION INC ↗
- Who funds GREENWICH DEPARTMENT OF HUMAN SERVICES FUND INC ↗
- Who funds NORWALK HOUSING FOUNDATION INC ↗
- Who funds REACH PREP INC ↗
- Who funds THE EVERGLADES FOUNDATION INC ↗
- Who funds BARBARAS HOUSE INC ↗
- Who funds HARBIN SHS ANIMAL RESCUE ↗
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: Fairfield County's Community Foundation Inc · Viking Global Foundation Inc · Ritter Family Foundation · Malkin Fund Inc · New Canaan Community Foundation Inc · Panwy Foundation Inc · The Scripps Family Fund for Education and the Arts · William Caspar Graustein Memorial Fund · The Finn Family Foundation Inc · The Resource Foundation Inc · The Near and Far Association Inc · Susan R and John W Sullivan 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 per and Astrid Heidenreich 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.
- Alliance for Community Empowerment Inc — 100% of income from government
- Kids in Crisis Inc — 49% of income from government
- Family & Children's Agency Inc — 47% of income from government
- Save the Sound — 37% of income from government
- Connecticut Council for Philanthropy — 24% of income from government
- Stamford Public Education Foundation Inc — 22% of income from government
- Boys & Girls Club of Stamford Inc — 17% of income from government
- Barbaras House Inc — 17% of income from government
- The Carver Inc — 16% of income from government
- United Way of Coastal and Western Connecticut Inc — 11% of income from government
- Boys & Girls Club of Greenwich — 7% of income from government
- Norwalk Acts Inc — 6% of income from government
- Hope Rural School Inc — 6% of income from government
- The Maritime Aquarium at Norwalk Inc — 5% of income from government
- Cardinal Shehan Center Inc — 4% of income from government
- United Way of Martin County Inc — 4% of income from government
- Greenwich Alliance for Education Inc — 3% of income from government
- Boys & Girls Club of Martin County — 2% of income from government
- The Banner Lake Club Inc — 1% of income from government
- Greenwich Arts Council Inc — 1% of income from government
- Greenwich Symphony Orchestra Inc — 1% of income from government
- The Legacy Theatre Inc — 1% of income from government
- Florida Oceanographic Society Inc — 0% of income from government
- Americares Foundation Inc — 0% of income from government
- Pan-Massachusetts Challenge 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 The per and Astrid Heidenreich Family Foundation?
Find your warmest path to The per and Astrid Heidenreich 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.