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· Private foundation

Duke 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.

$11k
Granted FY2025still arriving
18
Grants FY2025still arriving
5
States reached
$3k
Largest
01What it funds
0188% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2025.

Education$25kHealth$9kPhilanthropy$4kAnimals$3kHuman Services$2kArts & Culture$2kReligion$2kHousing & Shelter$700Other$0
02FY2025 · 18 grants

Where the money goes

Grants by size, and the largest recipients.

$283
Median grant
5
States reached
$96k
Total assets
Largest grants
RecipientAmount
JIM HILL MIDDLE SCHOOL$3,000
AMERICAN HEART ASSOCIATION$1,760
BLACK HILLS QUILTERS GUILD$1,540
MONUMENT HEALTH FOUNDATION$1,370
ALS ASSOCIATION$1,000
PLENTYWOOD HIGH SCHOOL$700
CALVARY LUTHERAN CHURCH$400
SOUTH PARK ELEMENTARY SCHOOL$337
TOYS FOR TOTS$283
Individual grant recipient$200
BENCH ELEMENTARY SCHOOL$179
DAWSON COMMUNITY COLLEGE FOUNDATION$150
ST JOSEPH'S CATHOLIC CHURCH$150
LAKE AREA ZOOLOGICAL SOCIETY$130
ZION LUTHERAN CHURCH$100
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 (FY19–22, $2k) land where the poverty rate runs at 9%, against an area that typically sits at 11%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 11%BIG SKY SENIOR SERVICES: $761 → 9%CASTLEWOOD COMMUNITY FOUNDATION: $780 → 8%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

MT
ND
MN
IL
WY
SD
IA
CA
KY
VA
TN
OK
GA
TX
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.

56%of every dollar goes to organizations it has funded before.
$29k · 20 repeat orgs$23k to everyone else

20 repeat relationships: 9 still active in FY2025, 11 since wound down; 9 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

20
46

Total granted

$29k
$19k

Median revenue growth · since first grant

+6%
+10%

Still filing today

35%
24%

New vs renewed · share of each year

In FY2025, 69% of grant dollars renewed an existing relationship; $4k went to new ones.

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

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

’19’20’21’22’23’24’25
HealthAnimalsPhilanthropyHuman ServicesEducationOther
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

  • AH
    American Heart Association Inc
    3× · 2021–2025 · $2k · revenue +33%
  • MH
    Monument Health Rapid City Hospital Inc
    2× · 2024–2025 · $2k · revenue +6%
  • AD
    ALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC
    3× · 2021–2024 · $700 · revenue +13%

Funded once

  • LA
    LAKE AREA TECHNICAL COLLEGE
    one grant, 2021 · $5k
  • HH
    HILARY HOPFAUF MEMORIAL ED SCHOLAR
    one grant, 2024 · $3k
  • BH
    BLACK HILLS ROADTRIP OF HOPE
    one grant, 2024 · $1k
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
Regional West Health Services

Health care services for the people of western nebraska and eastern wyoming.

Health
2
Asco Association

Asco association promotes the common business interests of its members by: (1) advocating for policies that improve the quality of cancer care; (2) maintaining the highest standards of oncology medical care through programs supporting…

Community Improvement
3
Minnesota Medical Association

To be the leading voice of medicine to make minnesota the healthiest state and the best place to practice.

—
4
American Society of Clinical Oncology Inc

See schedule o:asco is a professional oncology society committed to conquering cancer through research, education, and promotion of the highest quality patient care.

Health
5
Carson Tahoe Regional Healthcare

To enhance the health and well-being of the communities we serve.

Health
6
St Luke Community Hospital

The mission of st. luke community healthcare is to remain an integral component of the communities of the mission valley through the delivery of personal, compassionate, quality health care in a dignified manner that values our patients,…

Health
7
Federation of State Medical Boards of the United States Inc

The fsmb serves as the voice for state medical boards, supporting them through education, assessment, research and advocacy while providing services and initiatives that promote patient safety, quality health care and regulatory best…

Health
8
Minnesota Hospital Association

Advance the health of individuals and communities through leadership, advocacy and collaboration on behalf of minnesota hospitals and health systems. vision: minnesotans are healthy and have access to the right care at the right time in…

Community Improvement
9
Bozeman Deaconess Foundation

To support Bozeman Health Services by promoting community participation in and financial support of activities to improve community health and quality of life.

Philanthropy
10
Prairie Lakes Health Care System Inc

We make a positive difference in the health of the patients and communities we serve.

Health
11
Sarasota Memorial Healthcare Foundation Inc

Sarasota memorial healthcare foundation is the philanthropic partner that helps sarasota memorial health care system bring world-class care to our community.

Health
12
Riverview Healthcare Association

We deliver a healthcare experience that consistently exceeds patients' expectations through exceptional people - our people are our foundation. we employ trusted, dedicated professionals who serve with compassion, empathy and respect.…

Health
How this is measured
The grantee most central to the portfolio’s shape is Prairie Lakes Healthcare Foundation; the most unlike its peers is ZooMontana 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

22 grantees tracked through their own filings, 2017–2026.

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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 22 of the 77 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)
2
Early backer (in before they grew)
22/22
Grantees still filing
12/22
Grew since first funded

Where the money sits, by cause and then by grantee

JIM HILL MIDDLE SCHOOL: $12,903 · OtherJIM HILL MIDDLE SCHOOLLAKE AREA TECHNICAL COLLEGE: $4,600 · OtherLAKE AREA TECHNICAL COLLEGEHILARY HOPFAUF MEMORIAL ED SCHOLAR: $2,500 · OtherHILARY HOPFAUF MEMORIAL ED SCHOLARCODINGTON CO SEARCH AND RESCUE: $1,600 · OtherBlack Hills Quilters Guild: $1,540 · Other+56 more: $18,092 · Other+56 moreAmerican Heart Association Inc: $1,963 · HealthAmerican Heart …Monument Health Rapid City Hospital Inc: $1,810 · HealthMonument Health…BLACK HILLS ROADTRIP OF HOPE: $1,137 · HealthBLACK HILLS ROA…CORBETT MEDICAL FOUNDATION: $1,067 · HealthCORBETT MEDICAL…ALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC: $700 · HealthALZHEIMER'S DIS…ST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $300 · HealthPRAIRIE LAKES HEALTHCARE FOUNDATION: $250 · Health+1 more: $100 · HealthCASTLEWOOD COMMUNITY FOUNDATION: $780 · Human ServicesBIG SKY SENIOR SERVICES INC: $761 · Human ServicesUND Alumni Association and Foundation: $600 · EducationGLOBAL BRIGADES INC: $500 · EducationLAKE AREA ZOOLOGICAL SOCIETY: $622 · AnimalsZooMontana Inc: $273 · AnimalsMemphis Zoological Society: $100 · AnimalsMARINE TOYS FOR TOTS FOUNDATION: $193 · Philanthropy
Other$41,235Health$7,327Human Services$1,541Education$1,100Animals$995Philanthropy$193

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 budgetAmerican Heart Association Inc: $1,963 over 3y, 0.0% of budgetMonument Health Rapid City Hospital Inc: $1,810 over 2y, 0.0% of budgetBlack Hills Quilters Guild: $1,540 over 1y, 2.9% of budgetBLACK HILLS ROADTRIP OF HOPE: $1,137 over 1y, 1.6% of budgetCORBETT MEDICAL FOUNDATION: $1,067 over 1y, 0.0% of budgetCASTLEWOOD COMMUNITY FOUNDATION: $780 over 1y, 0.1% of budgetBIG SKY SENIOR SERVICES INC: $761 over 1y, 0.1% of budgetALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC: $700 over 3y, 0.0% of budgetLAKE AREA ZOOLOGICAL SOCIETY: $622 over 4y, 0.1% of budgetUND Alumni Association and Foundation: $600 over 1y, 0.0% of budgetGLOBAL BRIGADES INC: $500 over 1y, 0.0% of budgetWEST CANCER FOUNDATION: $302 over 2y, 0.0% of budgetST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $300 over 1y, 0.0% of budgetSIOUX COUNCIL BOY SCOUTS OF AMERICA INC: $275 over 2y, 0.0% of budgetZooMontana Inc: $273 over 2y, 0.0% of budgetPRAIRIE LAKES HEALTHCARE FOUNDATION: $250 over 1y, 0.1% of budgetTHE COALITION FOR THE HOMELESS INC: $200 over 1y, 0.0% of budgetMARINE TOYS FOR TOTS FOUNDATION: $193 over 1y, 0.0% of budgetMemphis Zoological Society: $100 over 1y, 0.0% of budgetAMERICAN CANCER SOCIETY INC: $100 over 1y, 0.0% of budgetStorybook Island: $76 over 1y, 0.0% 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 American Heart Association Inc ↗
  • Who funds Monument Health Rapid City Hospital Inc ↗
  • Who funds Black Hills Quilters Guild ↗
  • Who funds BLACK HILLS ROADTRIP OF HOPE ↗
  • Who funds CORBETT MEDICAL FOUNDATION ↗
  • Who funds AMYOTROPHIC LATERAL SCLEROSIS MN MINNESOTANORTH DAKOTASOUTH DAKOTA ↗
  • Who funds CASTLEWOOD COMMUNITY FOUNDATION ↗
  • Who funds BIG SKY SENIOR SERVICES INC ↗
  • Who funds ALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC ↗
  • Who funds LAKE AREA ZOOLOGICAL SOCIETY ↗
  • Who funds UND Alumni Association and Foundation ↗
  • Who funds GLOBAL BRIGADES INC ↗
  • Who funds WEST CANCER FOUNDATION ↗
  • Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC ↗
  • Who funds SIOUX COUNCIL BOY SCOUTS OF AMERICA INC ↗
  • Who funds ZooMontana Inc ↗
  • Who funds PRAIRIE LAKES HEALTHCARE FOUNDATION ↗

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.

First Interstate BancSystem Foundation IncMT17.9× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: First Interstate BancSystem Foundation Inc · South Dakota Community Foundation · Assurant Foundation · Thrivent Financial for Lutherans · Renaissance Charitable Foundation Inc · Charities Aid Foundation America · The Pfizer Foundation Inc · The Blackbaud Giving Fund · American Online Giving Foundation Inc · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc

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 Duke Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Duke Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    2report government grants on their 990 we could not trace to a source (not plotted)
    0rely 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 Duke Family Foundation?

    Find your warmest path to Duke 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 77 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

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