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Peter and Ann Lambertus Family Foundatio at a glance

· Private foundation

Peter and Ann Lambertus Family Foundatio

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$14M
Granted FY2024still arriving
66
Grants FY2024still arriving
14
States reached
$6.0M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0195% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2024.

Health$24MEducation$21MEnvironment$7.3MHousing & Shelter$4.4MAnimals$4.0MArts & Culture$3.0MSocial Science$404kPublic Benefit$247kOther$0
02FY2024 · 66 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k17 grants · $66k
  • $10k–50k39 grants · $823k
  • $50k–250k7 grants · $520k
  • $250k+3 grants · $13M
$15,000
Median grant
14
States reached
$298M
Total assets
Largest grants
RecipientAmount
MASSACHUSETTS GENERAL HOSPITAL$6,000,000
PURDUE FOUNDATION$6,000,000
HARWICH CONSERVATION TRUST$500,000
LYNCHBURG HUMANE SOCIETY$120,000
LEXINGTON ARTS & CRAFTS SOCIETY$100,000
ST FRANCIS HOUSE$100,000
DOGS DESERVE BETTER$50,000
LEXINGTON SYMPHONY$50,000
THE TRUSTEES OF RESERVATIONS$50,000
ANIMAL RESOURCES OF TIDEWATER$50,000
SFC VIRGINIA$45,000
THE HERITAGE FOUNDATION$40,000
HOOVER INSTITUTION$40,000
PRAGER UNIVERSITY FOUNDATION$40,000
NORTHEAST COONHOUND RESCUE$40,000
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 (FY19–24, $4.3M) land where the poverty rate runs at 16%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%FREEDOM SERVICE DOGS OF AMERICA: $10k → 8%ST FRANCIS HOUSE: $4.0M → 16%ST FRANCIS HOUSE: $200k → 16%ST FRANCIS HOUSE: $100k → 16%ST FRANCIS HOUSE: $11k → 16%ST FRANCIS HOUSE: $5k → 16%FISH OF SANCAP: $10k → 11%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

ME
VT
MI
NY
MA
IN
OH
PA
CA
UT
CO
KY
VA
MD
AZ
TN
NC
SC
DC
LA
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.

98%of every dollar goes to organizations it has funded before.
$75M · 90 repeat orgs$1.8M to everyone else

Grantees it renews have grown median revenue +47% since the first grant, against +24% for those funded once.

90 repeat relationships: 59 still active in FY2024, 31 since wound down; 6 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

90
26

Total granted

$75M
$1.7M

Median revenue growth · since first grant

+47%
+24%

Still filing today

66%
73%

New vs renewed · share of each year

In FY2024, 99% of grant dollars renewed an existing relationship; $97k went to new ones.

50%100%’18’19’20’21’22’23’24
RenewedFirst-time

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

’18’19’20’21’22’23’24
AnimalsArts & CultureEnvironmentEducationPublic BenefitHealthOther
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

  • THE TRUSTEES OF RESERVATIONS
    6× · 2019–2024 · $4.6M · revenue +36%
  • SF
    SAINT FRANCIS HOUSE INC
    5× · 2019–2024 · $4.3M · revenue +126%
  • HC
    HARWICH CONSERVATION TRUST
    5× · 2020–2024 · $2.2M · revenue +338%

Funded once

  • MC
    MUNROE CENTER FOR THE ARTS
    one grant, 2019 · $1.5M
  • CF
    Center for Immigration Studies Inc
    one grant, 2023 · $15k · revenue -3%
  • CI
    CATO INSTITUTEgraduated
    one grant, 2019 · $15k · revenue +108%
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
Connecticut Humane Society

The connecticut humane society is the leading resource in the state for companion animal welfare, enriching the lives of families and communities through adoption services, medical care, education, and prevention of cruelty.

Animals
2
Animal Rescue League of New Bedford Inc Dba Humane Society&Shelter-Southcoast

Animal rescue league of new bedford, inc., d/b/a humane society & shelter-southcoast, provides services to reduce the number of homeless pets. the organization provides quarantine services to other rescue organizations bringing animals…

Animals
3
Dorchester Paws

Dorchester Paws strives to instill humane principles into society through the prevention of cruelty to animals.

Animals
4
Animal Rescue Fund of the Hamptons Inc

THE ANIMAL RESCUE FUND OF THE HAMPTONS ACTIVELY RESCUES CATS AND DOGS, PROVIDES QUALITY CARE AND OFFERS SANCTUARY UNTIL LOVING HOMES CAN BE FOUND. ARF's work with animals, within our community and throughout the organization is guided by…

Animals
5
Humane Society for the Prevention of Cruelty to Animals

The primary mission of the humane society is to end animal cruelty, neglect and overpopulation in south carolina.

Animals
6
Franklin County Humane Society

Franklin County Humane Society dba Franklin County Animal Rescue (FCAR)promotes the health, welfare, and humane treatment of animal in Northwestern Vermont and provides temporary shelter for them with the goal of finding them good,…

Animals
7
Friends of the Scituate Shelter Inc

Providing adoption assistance and veterinary care and grooming for impounded or lost animals. maintain and upkeep the scituate animal shelter. thousands of animals adopted up to date.

Human Services
8
New Hampshire Society for the Prevention of Cruelty to Animals

To save the lives of animals through rescue, rehabilitation and adoption; to promote learning, eliminate animal cruelty and be a leader in advancing the highest standards in animal welfare.

Animals
9
Pet Animal Welfare Society of Connecticut Inc

Pet animal welfare society of ct (paws), established in 1962, is a no-kill animal rescue shelter dedicated to the rescue and adoption of our community's homeless and abused dogs and cats. paws efforts are focused on three critical needs:…

Animals
10
All About Animals Rescue

All about animals rescue's mission is no more homeless pets.

Animals
11
Animal Rescue Force Inc

Established in 1974, the organization's mission is to find responsible homes for dogs and cats and to encourage all dog and cat owners to spay and neuter their pets.

Animals
12
Flagler Humane Society Inc

We transform the lives of animals with compassionate care and services, outstanding educational programs, and advocacy for all animals.

Animals
How this is measured
The grantee most central to the portfolio’s shape is The Heritage Foundation; the most unlike its peers is Hound Haven of Lone Pine Inc. 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

86 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. 86 of the 123 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.

5
Load-bearing (≥25% of a budget)
23
Early backer (in before they grew)
84/86
Grantees still filing
69/86
Grew since first funded

Where the money sits, by cause and then by grantee

MASSACHUSETTS GENERAL HOSPITAL: $23,000,000 · OtherMASSACHUSETTS GENERAL HOSPITALPURDUE FOUNDATION: $21,000,000 · OtherPURDUE FOUNDATIONIndividual grant recipient: $6,750,000 · OtherIndividual grant recipientMGH: $5,260,000 · OtherMGH+61 more: $5,016,500 · Other+61 moreTHE TRUSTEES OF RESERVATIONS: $4,570,000 · EnvironmentTHE TRUSTE…HARWICH CONSERVATION TRUST: $2,190,500 · EnvironmentHARWICH CO…BREWSTER CONSERVATION TRUST: $411,000 · EnvironmentBREWSTER C…+4 more: $110,500 · EnvironmentSAINT FRANCIS HOUSE INC: $4,316,000 · Human Services+2 more: $20,000 · Human ServicesVIRGINIA FEDERATION OF HUMANE: $469,500 · AnimalsBEST FRIENDS ANIMAL SOCIETY: $395,000 · AnimalsANIMAL RESOURCES OF TIDEWATER: $280,000 · AnimalsLYNCHBURG HUMANE SOCIETY INC: $135,000 · AnimalsSPCA OF PITTSYLVANIA COUNTY INC: $125,000 · AnimalsCarolina Coonhound Rescue: $120,000 · AnimalsSFC VIRGINIA: $115,000 · AnimalsSCOTT COUNTY HUMANE SOCIETY INC: $95,000 · AnimalsAugusta Dog Adoptions: $95,000 · AnimalsAMERICAN BLACK AND TAN COONHOUND RESCUE INC: $95,000 · AnimalsGULF COAST HUMANE SOCIETY INC: $81,000 · Animals+18 more: $401,500 · AnimalsVERMONT ACADEMY: $310,000 · EducationNORTHEAST COONHOUND RESCUE INC: $310,000 · EducationDOGS DESERVE BETTER INC: $190,000 · EducationHILLSDALE COLLEGE: $67,000 · EducationCARY MEMORIAL LIBRARY FOUNDATION INC: $55,000 · EducationPRAGER UNIVERSITY FOUNDATION: $40,000 · Education+1 more: $15,000 · EducationDana-Farber Cancer Institute Inc: $270,000 · HealthFOUNDATION OF THE MASSACHUSETTS EYE AND EAR INFIRMARY INC: $220,000 · HealthSEMPER FI & AMERICA'S FUND: $25,000 · HealthBARRIER ISLAND GROUP FOR THE ARTS: $130,000 · Arts & CultureSHELL MUSEUM AND EDUCATIONAL FOUNDATION INC: $45,000 · Arts & CultureLEXINGTON HISTORICAL SOCIETY: $37,500 · Arts & CultureCAPE COD MUSEUM OF NATURAL HISTORY: $35,500 · Arts & CultureBOSTON SYMPHONY ORCHESTRA INC: $35,000 · Arts & CultureNATIONAL TRUST FOR HISTORIC PRESERVATION IN THE UNITED STATES: $25,000 · Arts & CultureHARWICH HISTORICAL SOCIETY: $20,000 · Arts & Culture+2 more: $5,500 · Arts & Culture
Other$61,026,500Environment$7,282,000Human Services$4,336,000Animals$2,407,000Education$987,000Health$515,000Arts & Culture$333,500

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE TRUSTEES OF RESERVATIONS: $4,570,000 over 6y, 4.6% of budgetSAINT FRANCIS HOUSE INC: $4,316,000 over 5y, 23% of budgetHARWICH CONSERVATION TRUST: $2,190,500 over 5y, 13% of budgetLEXINGTON ARTS AND CRAFTS SOCIETY INC: $860,000 over 6y, 52% of budgetVIRGINIA FEDERATION OF HUMANE: $469,500 over 4y, 75% of budgetBREWSTER CONSERVATION TRUST: $411,000 over 5y, 9.1% of budgetBEST FRIENDS ANIMAL SOCIETY: $395,000 over 6y, 0.1% of budgetVERMONT ACADEMY: $310,000 over 6y, 0.6% of budgetNORTHEAST COONHOUND RESCUE INC: $310,000 over 7y, 64% of budgetANIMAL RESOURCES OF TIDEWATER: $280,000 over 6y, 35% of budgetDana-Farber Cancer Institute Inc: $270,000 over 3y, 0.0% of budgetLexington Symphony Inc: $215,000 over 6y, 9.6% of budgetTHE HERITAGE FOUNDATION: $190,000 over 6y, 0.1% of budgetDOGS DESERVE BETTER INC: $190,000 over 6y, 9.6% of budgetAMERICAN ENTERPRISE INSTITUTE FOR PUBLIC POLICY RESEARCH: $135,000 over 5y, 0.1% of budgetLYNCHBURG HUMANE SOCIETY INC: $135,000 over 2y, 3.5% of budgetBARRIER ISLAND GROUP FOR THE ARTS: $130,000 over 5y, 1.3% of budgetSPCA OF PITTSYLVANIA COUNTY INC: $125,000 over 6y, 20% of budgetCarolina Coonhound Rescue: $120,000 over 6y, 17% of budgetSFC VIRGINIA: $115,000 over 5y, 5.8% of budgetSCOTT COUNTY HUMANE SOCIETY INC: $95,000 over 5y, 5.3% of budgetAugusta Dog Adoptions: $95,000 over 5y, 21% of budgetAMERICAN BLACK AND TAN COONHOUND RESCUE INC: $95,000 over 6y, 5.9% of budgetGULF COAST HUMANE SOCIETY INC: $81,000 over 5y, 0.5% of budgetHILLSDALE COLLEGE: $67,000 over 6y, 0.0% of budgetHOMES FOR OUR TROOPS INC: $65,000 over 4y, 0.1% of budgetHudson Institute Inc: $62,000 over 4y, 0.1% of budgetCARY MEMORIAL LIBRARY FOUNDATION INC: $55,000 over 6y, 8.2% of budgetINTERNATIONAL FUND FOR ANIMAL WELFARE INC: $50,000 over 6y, 0.0% of budgetTWIN COUNTY HUMANE SOCIETY: $45,000 over 3y, 19% of budgetSHELL MUSEUM AND EDUCATIONAL FOUNDATION INC: $45,000 over 5y, 0.8% of budgetSANIBEL-CAPTIVA CONSERVATION FOUNDATION: $45,000 over 5y, 0.4% of budgetPRAGER UNIVERSITY FOUNDATION: $40,000 over 1y, 0.1% of budgetGARY SINISE FOUNDATION: $40,000 over 3y, 0.1% of budgetLEXINGTON HISTORICAL SOCIETY: $37,500 over 6y, 1.8% of budgetCAPE COD MUSEUM OF NATURAL HISTORY: $35,500 over 7y, 1.1% of budgetBOSTON SYMPHONY ORCHESTRA INC: $35,000 over 5y, 0.0% of budgetYoung America's Foundation: $32,000 over 3y, 0.0% of budgetASSOCIATION TO PRESERVE CAPE COD INC: $30,500 over 5y, 0.7% of budgetMISFIT HOUNDS: $30,000 over 3y, 3.9% of budgetSWEET VIRGINIA BARN CATS: $30,000 over 3y, 14% of budgetTURNING POINT USA INC: $30,000 over 2y, 0.1% of budgetNATIONAL TRUST FOR HISTORIC PRESERVATION IN THE UNITED STATES: $25,000 over 5y, 0.0% of budgetSEMPER FI & AMERICA'S FUND: $25,000 over 2y, 0.0% of budgetThe Community Cat Alliance: $25,000 over 3y, 7.5% of budgetFISHER HOUSE FOUNDATION INC: $25,000 over 2y, 0.0% of budgetBREWSTER HISTORICAL SOCIETY INC: $24,500 over 7y, 5.4% of budgetALL HOUNDS ON DECK RESCUE: $20,000 over 2y, 12% 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 THE TRUSTEES OF RESERVATIONS ↗
  • Who funds SAINT FRANCIS HOUSE INC ↗
  • Who funds HARWICH CONSERVATION TRUST ↗
  • Who funds LEXINGTON ARTS AND CRAFTS SOCIETY INC ↗
  • Who funds VIRGINIA FEDERATION OF HUMANE ↗
  • Who funds BREWSTER CONSERVATION TRUST ↗
  • Who funds BEST FRIENDS ANIMAL SOCIETY ↗
  • Who funds VERMONT ACADEMY ↗
  • Who funds NORTHEAST COONHOUND RESCUE INC ↗
  • Who funds ANIMAL RESOURCES OF TIDEWATER ↗
  • Who funds Dana-Farber Cancer Institute Inc ↗
  • Who funds FOUNDATION OF THE MASSACHUSETTS EYE AND EAR INFIRMARY INC ↗
  • Who funds Lexington Symphony Inc ↗
  • Who funds THE HERITAGE FOUNDATION ↗
  • Who funds DOGS DESERVE BETTER INC ↗
  • Who funds AMERICAN ENTERPRISE INSTITUTE FOR PUBLIC POLICY RESEARCH ↗
  • Who funds LYNCHBURG HUMANE SOCIETY INC ↗
  • Who funds BARRIER ISLAND GROUP FOR THE ARTS ↗
  • Who funds SPCA OF PITTSYLVANIA COUNTY INC ↗
  • Who funds Carolina Coonhound Rescue ↗
  • Who funds SFC VIRGINIA ↗
  • Who funds SCOTT COUNTY HUMANE SOCIETY INC ↗
  • Who funds Augusta Dog Adoptions ↗
  • Who funds AMERICAN BLACK AND TAN COONHOUND RESCUE INC ↗
  • Who funds GULF COAST HUMANE SOCIETY INC ↗
  • Who funds HILLSDALE COLLEGE ↗
  • Who funds HOMES FOR OUR TROOPS 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.

Ibm International Fou…Petco LoveEastern Bank Foundati…Southwest Florida Com…Best Friends Animal S…Petsmart Charities IncGreen Family Charitab…Cape Cod Foundation I…The William H Donner …BISSELL Pet FoundationPedigree FoundationThe American Society …
Ibm International FoundationNY16.7× affinity9 shared granteesties to 7 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Ibm International Foundation · Petco Love · Eastern Bank Foundation · Southwest Florida Community Foundation Inc · Best Friends Animal Society · Petsmart Charities Inc · Green Family Charitable Foundation · Cape Cod Foundation Inc · The William H Donner Foundation Inc · BISSELL Pet Foundation · Pedigree Foundation · The American Society for the Prevention of Cruelty to Animals

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 Peter and Ann Lambertus Family Foundatio funds: left to right is the share of its income from government, bottom to top the share from Peter and Ann Lambertus Family Foundatio. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 220%6%25%56%100%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 4%
  • Association to Preserve Cape Cod Inc: 100% of income from government
  • Saint Francis House Inc: 18% of income from government
  • Brewster Conservation Trust: 8% of income from government
  • Dana-Farber Cancer Institute Inc: 7% of income from government
  • Sanibel-Captiva Conservation Foundation: 4% of income from government
  • The Trustees of Reservations: 2% of income from government
  • Lexington Historical Society: 1% of income from government
  • Crossroads for Kids Inc: 1% of income from government
  • Boston Symphony Orchestra Inc: 0% of income from government
  • Institute for Healthcare Improvement: 0% of income from government
no gov moneyreceives it· size = income
22get no government money at all
14report 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.

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 123 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Peter and Ann Lambertus Family Foundatio’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