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The per and Astrid Heidenreich Family Foundation at a glance

· 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.

$1.1M
Granted FY2025still arriving
64
Grants FY2025still arriving
6
States reached
$130k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0192% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Education$1.5MHuman Services$519kHealth$488kYouth Development$460kPublic Benefit$128kAnimals$117kRecreation & Sports$101kPhilanthropy$100kOther$0
02FY2025 · 64 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k40 grants · $97k
  • $10k–50k16 grants · $234k
  • $50k–250k8 grants · $752k
$5,000
Median grant
6
States reached
$18M
Total assets
Largest grants
RecipientAmount
FAU FOUNDATION INC$130,000
BOYS AND GIRLS CLUB OF GREENWICH$129,000
NORWALK ACTS$100,000
THE CARVER FOUNDATION$100,000
LET'S GET READY$100,000
BANNER LAKE CLUB INC$82,500
SOUTHERN CONNECTICUT STATE UNIVERSITY$60,000
NORWALK HOSPITAL FOUNDATION$50,000
FAMILY AND CHILDREN'S AGENCY$25,000
LEAP INC$25,000
STAMFORD HOSPITAL FOUNDATION$20,000
HORIZONS GREENS FARM ACADEMY$20,000
BOYS AND GIRLS CLUB OF MARTIN COUNTY$20,000
MYSTIC AQUARIUM$19,100
TEACH FOR AMERICA$15,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its 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. Its grants skew toward lower-need ZIPs.

area typical 9%PATHWAYS INC: $1k → 13%AMERICAN RED CROSS: $5k → 11%FILLING IN THE BLANKS: $3k → 9%FILLING IN THE BLANKS: $3k → 9%FILLING IN THE BLANKS: $2k → 9%THE CARVER FOUNDATION: $100k → 9%THE CARVER FOUNDATION: $100k → 9%FAMILY AND CHILDREN'S AGENCY: $29k → 9%FAMILY AND CHILDREN'S AGENCY: $25k → 9%FAMILY AND CHILDREN'S AGENCY: $25k → 9%FAMILY AND CHILDREN'S AGENCY: $25k → 9%FAMILY AND CHILDREN'S AGENCY: $25k → 9%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

WA
MI
NY
MA
OH
PA
CT
CA
VA
NM
NC
GA
TX
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

77%of every dollar goes to organizations it has funded before.
$2.9M · 70 repeat orgs$869k to everyone else

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

Re-uppedFunded once

Organizations

70
48

Total granted

$2.9M
$644k

Median revenue growth · since first grant

+22%
+24%

Still filing today

71%
46%

New vs renewed · share of each year

In FY2025, 79% of grant dollars renewed an existing relationship; $225k went to new ones.

50%100%’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’20’21’22’23’24’25
EducationAnimalsYouth DevelopmentArts & CulturePhilanthropyEnvironmentOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • TB
    THE BANNER LAKE CLUB INC
    3× · 2023–2025 · $238k · revenue +22%
  • BG
    BOYS & GIRLS CLUB OF GREENWICH
    3× · 2020–2025 · $213k · revenue +222%
  • PL
    PROJECT LIFT INC
    2× · 2022–2025 · $135k · revenue +26%

Funded once

  • NP
    NORWALK PUBLIC SCHOOLS
    one grant, 2020 · $125k
  • ML
    MARC LUSTGARTEN PANCREATIC CANCER FOUNDATION
    one grant, 2022 · $101k
  • MS
    MEMORIAL SLOAN KETTERING
    one grant, 2022 · $100k
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
University of New Haven

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…

Education
2
The Bridge Academy Inc

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…

Education
3
Cold Spring School Inc

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.

Education
4
Stamford Charter School for Excellence

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,…

Education
5
Brunswick School Inc

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…

Education
6
Connecticut Farmland Trust Inc

Protect Connecticuts farmland for agricultural use by purchasing and accepting donations of agricultural conservation easements

Food & Nutrition
7
Connecticut Public Broadcasting Inc

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…

Arts & Culture
8
Quinnipiac University

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…

Education
9
Connecticut Aeronautical Historical Association Inc

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…

Arts & Culture
10
Yale University

To improve the world through research, scholarship, education, preservation, and practice.

Education
11
South Shore Charter School

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…

Education
12
Connecticut Cancer Foundation Inc

To provide funds to benefit families affected by cancer and to support cancer research and education.

—
How this is measured
The grantee most central to the portfolio’s shape is Norwalk Acts Inc; 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.
04the grantee network

80 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 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.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
16
Early backer (in before they grew)
80/80
Grantees still filing
51/80
Grew since first funded

Where the money sits, by cause and then by grantee

DUNBAR EARLY LEARNING CENTER: $135,000 · OtherDUNBAR EARLY LEARNING CENTERNORWALK PUBLIC SCHOOLS: $125,000 · OtherNORWALK PUBLIC SCHOOLSHORIZONS GREENS FARM ACADEMY: $123,500 · OtherHORIZONS GREENS FARM ACADEMYSTAMFORD HOSPITAL FOUNDATION: $120,000 · OtherSTAMFORD HOSPITAL FOUNDATIONMARC LUSTGARTEN PANCREATIC CANCER FOUNDATION: $100,507 · OtherMARC LUSTGARTEN PANCREATIC CANCER FOUNDATIONMEMORIAL SLOAN KETTERING: $100,436 · OtherMEMORIAL SLOAN KETTERINGGEORGE WASHINGTON CARVER COMMUNITY CENTER: $90,000 · OtherGEORGE WASHINGTON CARVER COMMUNITY CENTERSOUTHERN CONNECTICUT STATE UNIVERSITY: $60,000 · OtherMYSTIC AQUARIUM: $54,100 · Other+88 more: $602,042 · Other+88 moreFLORIDA ATLANTIC UNIVERSITY FOUNDATION INC: $400,000 · EducationFLORIDA ATLANTIC UNIVERSITY…LET'S GET READY INC: $200,000 · EducationLET'S GET READY INCTeach for America Inc: $85,000 · EducationTeach for America IncHOPE RURAL SCHOOL INC: $60,000 · EducationHOPE RURAL SCHOOL INCCMA EDUCATION FOUNDATION INC: $50,000 · EducationCMA EDUCATION FOUNDATION IN…THE MATTHEW GAFFNEY FOUNDATION: $50,000 · EducationTHE MATTHEW GAFFNEY FOUNDAT…+10 more: $72,000 · Education+10 moreTHE BANNER LAKE CLUB INC: $237,500 · Youth DevelopmentTHE BANNER LAKE CLUB…BOYS & GIRLS CLUB OF GREENWICH: $212,564 · Youth DevelopmentBOYS & GIRLS CLUB OF…PROJECT LIFT INC: $135,000 · Youth DevelopmentPROJECT LIFT INCBOYS & GIRLS CLUB OF MARTIN COUNTY: $95,000 · Youth DevelopmentBOYS & GIRLS CLUB OF…+2 more: $8,000 · Youth DevelopmentTHE CARVER INC: $200,000 · Human ServicesTHE CARVER…FAMILY & CHILDREN'S AGENCY INC: $128,975 · Human ServicesFAMILY & C…+3 more: $13,000 · Human ServicesLOBLOLLY COMMUNITY FOUNDATION INC: $60,000 · PhilanthropySTAMFORD PUBLIC EDUCATION FOUNDATION INC: $40,000 · PhilanthropyHOBE SOUND COMMUNITY CHEST INC: $30,000 · PhilanthropyGREENWICH DEPARTMENT OF HUMAN SERVICES FUND INC: $20,000 · PhilanthropyCONNECTICUT COUNCIL FOR PHILANTHROPY: $10,000 · Philanthropy+2 more: $7,500 · PhilanthropyNORWALK ACTS INC: $100,000 · Community ImprovementNORWALK HOUSING FOUNDATION INC: $20,000 · Community ImprovementNorwalk Hospital Foundation: $75,000 · Health+3 more: $1,750 · Health
Other$1,510,585Education$917,000Youth Development$688,064Human Services$341,975Philanthropy$167,500Community Improvement$120,000Health$76,750

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetFLORIDA ATLANTIC UNIVERSITY FOUNDATION INC: $400,000 over 4y, 0.2% of budgetTHE BANNER LAKE CLUB INC: $237,500 over 3y, 2.0% of budgetBOYS & GIRLS CLUB OF GREENWICH: $212,564 over 3y, 1.1% of budgetTHE CARVER INC: $200,000 over 2y, 1.1% of budgetLET'S GET READY INC: $200,000 over 2y, 2.8% of budgetPROJECT LIFT INC: $135,000 over 2y, 2.4% of budgetFAMILY & CHILDREN'S AGENCY INC: $128,975 over 5y, 0.2% of budgetNORWALK ACTS INC: $100,000 over 1y, 9.5% of budgetBOYS & GIRLS CLUB OF MARTIN COUNTY: $95,000 over 6y, 0.1% of budgetTeach for America Inc: $85,000 over 5y, 0.0% of budgetNorwalk Hospital Foundation: $75,000 over 2y, 0.2% of budgetLOBLOLLY COMMUNITY FOUNDATION INC: $60,000 over 6y, 1.5% of budgetHOPE RURAL SCHOOL INC: $60,000 over 6y, 0.7% of budgetCMA EDUCATION FOUNDATION INC: $50,000 over 5y, 13% of budgetTHE MATTHEW GAFFNEY FOUNDATION: $50,000 over 5y, 8.8% of budgetSTAMFORD PUBLIC EDUCATION FOUNDATION INC: $40,000 over 2y, 1.5% of budgetHOBE SOUND COMMUNITY CHEST INC: $30,000 over 6y, 0.2% of budgetDELMAR FARM SANCTUARY INC: $30,000 over 3y, 4.3% of budgetCARDINAL QUARTERBACK CLUB INC: $22,500 over 3y, 4.7% of budgetGREENWICH ALLIANCE FOR EDUCATION INC: $22,500 over 2y, 1.8% of budgetGREENWICH DEPARTMENT OF HUMAN SERVICES FUND INC: $20,000 over 5y, 4.3% of budgetTHE EVERGLADES FOUNDATION INC: $20,000 over 4y, 0.0% of budgetNORWALK HOUSING FOUNDATION INC: $20,000 over 2y, 2.4% of budgetREACH PREP INC: $20,000 over 2y, 0.6% of budgetBARBARAS HOUSE INC: $19,700 over 2y, 3.2% of budgetHOBE SOUND NATURE CENTER INC: $12,000 over 6y, 0.5% of budgetHARBIN SHS ANIMAL RESCUE: $12,000 over 2y, 0.6% of budgetCONNECTICUT COUNCIL FOR PHILANTHROPY: $10,000 over 1y, 0.6% of budgetSAVE THE SOUND: $10,000 over 1y, 0.1% of budgetNORWALKSTAMFORD GRASSROOTS TENNIS & EDUCATION INC: $10,000 over 1y, 1.1% of budgetHOLE IN THE WALL GANG FUND INC: $10,000 over 1y, 0.1% of budgetTHE MARITIME AQUARIUM AT NORWALK INC: $9,472 over 2y, 0.1% of budgetThe American-Scandinavian Foundation: $8,000 over 4y, 0.1% of budgetFILLING IN THE BLANKS INC: $7,000 over 3y, 0.1% of budgetALLIANCE FOR COMMUNITY EMPOWERMENT INC: $6,500 over 1y, 0.0% of budgetBRANFORD FOOD PANTRY: $6,000 over 3y, 1.0% of budgetMALTZ JUPITER THEATRE INC: $6,000 over 2y, 0.0% of budgetKIDS HELPING KIDS INC: $6,000 over 2y, 1.4% of budgetGREENWICH POLICE SCHOLARSHIP FUND: $6,000 over 4y, 1.9% of budgetTHE LEGACY THEATRE INC: $6,000 over 3y, 0.1% of budgetBRANFORD LAND TRUST INC: $6,000 over 3y, 1.2% of budgetBOYS & GIRLS CLUB OF STAMFORD INC: $5,500 over 3y, 0.1% of budgetFOOD RESCUE US INC: $5,500 over 2y, 0.0% of budgetUNITED WAY OF MARTIN COUNTY INC: $5,000 over 1y, 0.2% of budgetAmerican National Red Cross & Its Constituent Chapters and Branches: $5,000 over 1y, 0.0% of budgetHELP INC CENTER AGAINST VIOLENCE: $5,000 over 1y, 0.3% of budgetKHAN ACADEMY INC: $5,000 over 1y, 0.0% of budgetNew Canaan Nature Center Association Inc: $5,000 over 1y, 0.2% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, 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 LOBLOLLY COMMUNITY FOUNDATION INC ↗
  • Who funds HOPE RURAL SCHOOL 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 THE EVERGLADES FOUNDATION INC ↗
  • Who funds NORWALK HOUSING FOUNDATION INC ↗
  • Who funds REACH PREP INC ↗
  • Who funds BARBARAS HOUSE INC ↗
  • Who funds HOBE SOUND NATURE CENTER INC ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Fairfield County's Co…Viking Global Foundat…Ritter Family Foundat…Malkin Fund IncNew Canaan Community …Panwy Foundation IncThe Scripps Family Fu…William Caspar Graust…The Finn Family Found…The Resource Foundati…The Near and Far Asso…Susan R and John W Su…
Fairfield County's Community Foundation IncCT40.7× affinity19 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

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

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization The per and Astrid Heidenreich Family Foundation funds: left to right is the share of its income from government, bottom to top the share from The per and Astrid Heidenreich Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 280%1%4%8%15%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 6%
  • 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
no gov moneyreceives it· size = income
28get no government money at all
13report government grants on their 990 we could not trace to a source (not plotted)
1rely on government for over half their income
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
05Through Plinth

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.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 137 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on per and Astrid Heidenreich Family’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home