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The Duffield Family Foundation Dba Maddie's Fund at a glanceAlso receives grants: funding profile →

· Private foundation

The Duffield Family Foundation Dba Maddie's Fund

Its FY2025 filing reports that it accepted unsolicited grant applications.

$14M
Granted FY2025still arriving
181
Grants FY2025still arriving
41
States reached
$1.5M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Animals$74MEducation$16MHealth$8.6MHousing & Shelter$3.0MScience & Tech$1.4MCommunity Improvement$1.3MInternational$781kHuman Services$649kOther$0
02FY2025 · 181 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k113 grants · $263k
  • $10k–50k33 grants · $684k
  • $50k–250k17 grants · $1.5M
  • $250k+18 grants · $12M
$3,000
Median grant
41
States reached
$278M
Total assets
Largest grants
RecipientAmount
COMPANIONS AND ANIMALS FOR REFORM AND EQUITY$1,466,000
SAN FRANCISCO SPCA$1,158,767
UC DAVIS FOUNDATION$1,137,345
CORNELL UNIVERSITY$935,000
HUMANE RESCUE ALLIANCE$878,993
UNIVERSITY OF WISCONSIN-MADISON$827,014
BEST FRIENDS ANIMAL SOCIETY$750,000
UNIVERSITY OF TENNESSEE$704,983
INQUIRING SYSTEMS INC$625,000
AUSTIN PETS ALIVE$572,500
JOYBOUND PEOPLE & PETS$405,000
OPEN DOOR VETERINARY COLLECTIVE$403,103
UNIVERSITY OF FLORIDA FOUNDATION$335,090
ALIGNCARE HEALTH INC$330,000
TEAM SHELTER USA LLC$310,000
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 (FY17–25, $915k) land where the poverty rate runs at 14%, against an area that typically sits at 10%. 99% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%NAGI FOUNDATION: $30k → 11%NAGI FOUNDATION: $25k → 11%Mostly Mutts Animal Rescue and Adoption Inc: $5k → 8%NAGI FOUNDATION: $20k → 11%VENTURA COUNTY ANIMAL SERVICES: $5k → 10%HOUSING EQUITY & ADVOCACY RESOURCE TEAM: $50k → 14%HOUSING EQUALITY & ADVOCACY RESOURCE TEAM: $10k → 14%HOUSING EQUALITY & ADVOCACY RESOURCE TEAM: $10k → 14%HOUSING EQUALITY & ADVOCACY RESOURCE TEAM: $10k → 14%Edward Charles Foundation: $750k → 14%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

AK
ME
VT
NH
WA
ID
MT
ND
MN
IL
WI
MI
NY
MA
OR
NV
WY
SD
IA
IN
OH
PA
NJ
CT
RI
CA
UT
CO
NE
MO
KY
WV
VA
MD
DE
AZ
NM
KS
AR
TN
NC
SC
DC
HI
OK
LA
MS
AL
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.

92%of every dollar goes to organizations it has funded before.
$101M · 597 repeat orgs$8.6M to everyone else

Grantees it renews have grown median revenue +52% since the first grant, against +20% for those funded once.

597 repeat relationships: 100 still active in FY2025, 497 since wound down; 81 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

597
905

Total granted

$101M
$5.1M

Median revenue growth · since first grant

+52%
+20%

Still filing today

67%
53%

New vs renewed · share of each year

In FY2025, 75% of grant dollars renewed an existing relationship; $3.5M went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
AnimalsHuman ServicesEducationHealthPhilanthropyCommunity ImprovementOther
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

  • AP
    AUSTIN PETS ALIVE INC
    9× · 2017–2025 · $11M · revenue +30% · 32% of their budget
  • BEST FRIENDS ANIMAL SOCIETY
    9× · 2017–2025 · $7.7M · revenue +31%
  • HW
    Humane World for Animals Inc
    8× · 2017–2025 · $7.0M · revenue +46%

Funded once

  • EC
    EDWARD CHARLES FOUNDATIONgraduated
    one grant, 2017 · $750k · revenue +863%
  • TZ
    TARGET ZEROEDWARD CHARLES FOUNDATION
    one grant, 2018 · $250k
  • SA
    Shelter Animals Count
    one grant, 2017 · $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
Hope Fur Paws Rescue

To help injured, abandoned and unwanted animals. We provide food, vet care that includes heartworm prevention and spay or neuter services, shelter and anything else needed.

Animals
2
Paws and Claws Animal Shelter
Animals
3
Safe Haven Inc
Animals
4
Paws Animal Rescue Center

To help rescue unwanted pets

Animals
5
Fur Animal Rescue

Animal rescue organization dedicated to finding homes for animals at the animal shelter. we also provde vet care foster homes, and assistance with homing for special needs animals.

Animals
6
Pets Without Partners

Find homes for homeless/abandoned dogs. Provide full vet car and housing while awaiting adoption,

Animals
7
Raskels Rescue
Animals
8
Pound Pets Inc

Animal Rescue - finding homes for abandoned animals in Granite City, spaying and neutering stray animals and feral cats

Animals
9
Animal Rescue and Adoption Agency Inc

An animal rescue/adoption Agency. Rescued animals are from kill shelters or owner surrenders facing hardship then rehabbed/medical completed while in foster care then adopted into loving homes.

Animals
10
Paws and Claws Animal Welfare Society Inc

Animal Rescue

Animals
11
Anas Safe Haven Rescue Inc

Animal Welfare

Animals
12
Happy Acres Pet Rescue
Animals
How this is measured
The grantee most central to the portfolio’s shape is The Cat House On the Kings Inc; the most unlike its peers is Monmouth University 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

971 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. 971 of the 1,585 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.

12
Load-bearing (≥25% of a budget)
354
Early backer (in before they grew)
929/971
Grantees still filing
670/971
Grew since first funded

Where the money sits, by cause and then by grantee

AUSTIN PETS ALIVE INC: $10,609,105 · AnimalsAUSTIN PETS ALIVE INCBEST FRIENDS ANIMAL SOCIETY: $7,735,435 · AnimalsBEST FRIENDS ANIMAL SOCIETYHumane World for Animals Inc: $7,045,541 · AnimalsHumane World for Animals IncCOMPANIONS AND ANIMALS FOR REFORM AND EQUITY INC: $6,195,500 · AnimalsCOMPANIONS AND ANIMALS FOR REFORM AND EQUITY INCMUTTVILLE: $2,039,500 · Animals+107 more: $22,392,706 · Animals+107 moreUNIVERSITY OF TENNESSEE: $7,936,709 · OtherUNIVERSITY OF TENNESSEEUNIVERSITY OF FLORIDA: $6,211,997 · OtherUNIVERSITY OF FLORIDAUNIVERSITY OF WISCONSIN-MADISON: $5,176,000 · OtherUNIVERSITY OF WISCONSIN-MADISONIndividual grant recipient: $3,312,500 · OtherIndividual grant recipientREGENTS OF THE UNIVERSITY OF CALIFORNIA: $2,512,578 · OtherREGENTS OF THE UNIVERSITY OF CALIFORNIAUNIVERSITY OF CALIFORNIA- DAVIS: $2,360,703 · OtherUNIVERSITY OF CALIFORNIA- DAVISARIZONA STATE UNIVERSITY: $1,888,495 · Other+67 more: $9,149,462 · Other+67 moreCornell University: $3,242,742 · EducationTHE UC DAVIS FOUNDATION: $1,137,345 · EducationUNIVERSITY OF DENVER: $851,552 · EducationTHE UNIVERSITY OF FLORIDA FOUNDATION INC: $335,090 · Education+3 more: $301,714 · EducationEDWARD CHARLES FOUNDATION: $750,000 · Human ServicesHOUSING EQUITY & ADVOCACY RESOURCE TEAM: $88,000 · Human ServicesNagi Foundation Inc: $75,000 · Human ServicesINQUIRING SYSTEMS INC: $625,000 · Community ImprovementPETCO LOVE: $150,000 · PhilanthropyBALTIMORE RESEARCH & EDUCATION FOUNDATION INC: $55,000 · HealthADVENTURES WITH AUTISM INC: $25,000 · Health
Animals$56,017,787Other$38,548,444Education$5,868,443Human Services$913,000Community Improvement$625,000Philanthropy$150,000Health$80,000

Showing the 200 largest grantees by grant value.

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 budgetAUSTIN PETS ALIVE INC: $10,609,105 over 9y, 32% of budgetBEST FRIENDS ANIMAL SOCIETY: $7,735,435 over 9y, 1.6% of budgetHumane World for Animals Inc: $7,045,541 over 8y, 1.2% of budgetCOMPANIONS AND ANIMALS FOR REFORM AND EQUITY INC: $6,195,500 over 5y, 61% of budgetCornell University: $3,242,742 over 9y, 0.0% of budgetMUTTVILLE: $2,039,500 over 4y, 21% of budgetTHE SAN FRANCISCO SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $1,762,217 over 8y, 2.0% of budgetWASHINGTON HUMANE SOCIETY: $1,630,868 over 8y, 3.9% of budgetBerkeley East Bay Humane Society Inc dba Berkeley Humane: $1,625,147 over 9y, 19% of budgetJoybound People and Pets FKA Tony La Russa's Animal Rescue Foundation: $1,579,966 over 8y, 3.6% of budgetTHE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $1,515,512 over 7y, 0.3% of budgetTHE UC DAVIS FOUNDATION: $1,137,345 over 1y, 1.0% of budgetOPEN DOOR VETERINARY COLLECTIVE: $1,119,679 over 4y, 37% of budgetCHARLESTON ANIMAL SOCIETY: $1,009,568 over 5y, 4.9% of budgetUNIVERSITY OF DENVER: $851,552 over 6y, 0.1% of budgetEDWARD CHARLES FOUNDATION: $750,000 over 1y, 11% of budgetNATIONAL ANIMAL CARE & CONTROL ASSOCIATION: $715,500 over 9y, 19% of budgetDENVER DUMB FRIENDS LEAGUE: $650,000 over 3y, 1.1% of budgetSan Antonio Pets Alive Inc: $645,000 over 3y, 23% of budgetINQUIRING SYSTEMS INC: $625,000 over 1y, 4.8% of budgetHumane Network: $583,520 over 3y, 14% of budgetCAT TOWN: $559,500 over 4y, 36% of budgetThe Association for Animal Welfare Advancement: $546,000 over 8y, 12% of budgetShelter Animals Count: $525,000 over 6y, 25% of budgetHUMANE SOCIETY SILICON VALLEY: $438,900 over 5y, 1.8% of budgetANIMAL CARE AND CONTROL OF NEW YORK CITY INC: $369,926 over 2y, 1.9% of budgetTHE UNIVERSITY OF FLORIDA FOUNDATION INC: $335,090 over 1y, 0.1% of budgetALBEMARLE SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS INC: $332,500 over 5y, 2.8% of budgetBrother Wolf Animal Rescue Inc: $275,000 over 3y, 0.5% of budgetLIFELINE ANIMAL PROJECT INC: $260,000 over 4y, 1.4% of budgetPROJECT STREET VET: $252,000 over 3y, 4.3% of budgetASSOCIATION OF SHELTER VETERINARIANS INC: $233,000 over 6y, 27% of budgetAlliance for Contraception in Cats & Dogs: $225,000 over 7y, 16% of budgetCAT ADOPTION TEAM: $215,407 over 5y, 3.2% of budgetEMANCIPET INC: $213,000 over 3y, 1.2% of budgetMY DOG IS MY HOME INC: $209,840 over 5y, 45% of budgetFRIENDS OF OAKLAND ANIMAL SERVICES: $203,610 over 1y, 10.0% of budgetPennsylvania Society for the Prevention of Cruelty to Animals: $173,500 over 3y, 1.3% of budgetSPCA of Texas: $164,000 over 5y, 0.7% of budgetMAUI HUMANE SOCIETY: $156,500 over 6y, 1.1% of budgetFRESNO HUMANE ANIMAL SERVICES: $150,500 over 4y, 2.3% of budgetPALM VALLEY ANIMAL SOCIETY FKA PALM VALLEY ANIMAL CENTER: $144,875 over 6y, 1.1% of budgetSTRAY CAT ALLIANCE: $141,400 over 3y, 2.9% of budgetKANSAS CITY PET PROJECT: $139,500 over 6y, 0.6% of budgetMONMOUTH UNIVERSITY INC: $131,334 over 2y, 0.0% of budgetSAN DIEGO HUMANE SOCIETY AND SPCA: $127,500 over 5y, 0.1% of budgetOPERATION KINDNESS: $126,000 over 5y, 0.3% of budgetJACKSONVILLE HUMANE SOCIETY INC: $125,700 over 5y, 1.0% 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 AUSTIN PETS ALIVE INC ↗
  • Who funds BEST FRIENDS ANIMAL SOCIETY ↗
  • Who funds Humane World for Animals Inc ↗
  • Who funds COMPANIONS AND ANIMALS FOR REFORM AND EQUITY INC ↗
  • Who funds Cornell University ↗
  • Who funds MUTTVILLE ↗
  • Who funds THE SAN FRANCISCO SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS ↗
  • Who funds WASHINGTON HUMANE SOCIETY ↗
  • Who funds Berkeley East Bay Humane Society Inc dba Berkeley Humane ↗
  • Who funds Joybound People and Pets FKA Tony La Russa's Animal Rescue Foundation ↗
  • Who funds THE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS ↗
  • Who funds THE UC DAVIS FOUNDATION ↗
  • Who funds OPEN DOOR VETERINARY COLLECTIVE ↗
  • Who funds CHARLESTON ANIMAL SOCIETY ↗
  • Who funds UNIVERSITY OF DENVER ↗
  • Who funds EDWARD CHARLES FOUNDATION ↗
  • Who funds NATIONAL ANIMAL CARE & CONTROL ASSOCIATION ↗
  • Who funds DENVER DUMB FRIENDS LEAGUE ↗
  • Who funds San Antonio Pets Alive Inc ↗
  • Who funds INQUIRING SYSTEMS INC ↗
  • Who funds Humane Network ↗
  • Who funds CAT TOWN ↗
  • Who funds The Association for Animal Welfare Advancement ↗
  • Who funds Shelter Animals Count ↗
  • Who funds HUMANE SOCIETY SILICON VALLEY ↗
  • Who funds ANIMAL CARE AND CONTROL OF NEW YORK CITY INC ↗
  • Who funds THE UNIVERSITY OF FLORIDA FOUNDATION INC ↗
  • Who funds ALBEMARLE SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS 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.

Petco LoveBest Friends Animal S…BISSELL Pet FoundationThe American Society …Banfield FoundationPetsmart Charities IncPedigree FoundationHumane World for Anim…The Michelson Found A…Greater Good CharitiesThe Grey Muzzle Organ…Vca Charities
Petco LoveTX210× affinity317 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Petco Love · Best Friends Animal Society · BISSELL Pet Foundation · The American Society for the Prevention of Cruelty to Animals · Banfield Foundation · Petsmart Charities Inc · Pedigree Foundation · Humane World for Animals Inc · The Michelson Found Animals Foundation Inc · Greater Good Charities · The Grey Muzzle Organization · Vca Charities

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 Duffield Family Foundation Dba Maddie's Fund funds: left to right is the share of its income from government, bottom to top the share from The Duffield Family Foundation Dba Maddie's Fund. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 140%6%25%56%100%funder's share of their income ↑0%3%5%8%10%share of the org’s income from government →median 0%
  • Monmouth University Inc: 0% of income from government
  • Animal Rescue League of Boston: 0% of income from government
no gov moneyreceives it· size = income
14get no government money at all
34report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–10%
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 Duffield Family Foundation Dba Maddie's Fund?

Find your warmest path to The Duffield Family Foundation Dba Maddie's Fund 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 1585 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 Duffield Family Foundation Dba Maddie'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