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Katherine Wells Macmillan Foundation at a glance

· Private foundation

Katherine Wells Macmillan Foundation

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.

$5.7M
Granted FY2024still arriving
6
Grants FY2024still arriving
3
States reached
$1.5M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead

Read this first · the figures below need context

61% of Katherine Wells Macmillan Foundation’s FY2024 grant dollars went to Community Foundation Of The Florida Keys, not to grantees.

Its money now reaches organizations through that sponsor, which does not report who recommended each grant. FY2024 names 3 organizations directly, so a portfolio cannot be read from it.

Organizations named directly on the return

3
’17
3
’18
2
’19
3
’20
2
’21
2
’22
2
’23
3
’24

Amber years are those where most dollars went to a sponsor.

01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Philanthropy$11MHealth$1.9MHuman Services$1.2M
02FY2024 · 6 grants

Where the money goes

Grants by size, and the largest recipients.

$1,000,000
Median grant
3
States reached
$132M
Total assets
Largest grants
RecipientAmount
UNITED WAY OF COLLIER AND THE KEYS$1,487,500
COMMUNITY FOUNDATION OF THE FLORIDA KEYS$1,487,500
NEW HAMPSHIRE CHARITABLE FOUNDATION$1,000,000
COMMUNITIES FOUNDATION OF OKLAHOMA$1,000,000
GRACE JONES COMMUNITY CENTER$500,000
FLORIDA KEYS CHILDREN'S SHELTER$250,000
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 (FY17–24, $1.2M) land where the poverty rate runs at 13%, against an area that typically sits at 12%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 12%FLORIDA KEYS CHILDREN'S SHELTER: $250k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $35k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $35k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $35k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $35k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $33k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $33k → 13%FLORIDA KEYS CHILDREN'S SHELTER: $30k → 13%GRACE JONES COMMUNITY CENTER: $500k → 13%GRACE JONES COMMUNITY CENTER: $35k → 13%GRACE JONES COMMUNITY CENTER: $35k → 13%GRACE JONES COMMUNITY CENTER: $35k → 13%GRACE JONES COMMUNITY CENTER: $35k → 13%GRACE JONES COMMUNITY CENTER: $33k → 13%GRACE JONES COMMUNITY CENTER: $33k → 13%GRACE JONES COMMUNITY CENTER: $30k → 13%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.
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
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
Homestead Hospital Inc

As part of the baptist health network, the mission of homestead hospital inc. is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
2
Florida Chamber of Commerce Foundation Inc

Working in partnership with state business leaders to secure florida's future.

—
3
West Kendall Baptist Hospital Inc

As part of the baptist health network, the mission of west kendall baptist hospital, inc. is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist…

Health
4
Baptist Health South Florida Inc

The mission of baptist health is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a faith-based organization guided by the spirit of…

Health
5
Baptist Hospital of Miami Inc

As part of the baptist health network, the mission of baptist hospital of miami is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
6
Doctors Hospital Inc

As part of the baptist health network, the mission of doctors hospital, inc. is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
7
South Miami Hospital Inc

As part of the baptist health network, the mission of south miami hospital is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
8
Fishermens Health Inc

As part of the baptist health network, the mission of fishermen's health, inc. is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
9
Mariners Hospital Inc

As part of the baptist health network, the mission of mariner's hospital is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
10
Baptist Outpatient Services Inc

As part of the baptist health network, the mission of baptist outpatient services is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is…

Health
11
Bethesda Hospital Inc

As part of the baptist health network, the mission of bethesda hospital is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist health is a…

Health
12
Baptist Health Medical Group Inc

As part of the baptist health network, the mission of baptist health medical group inc is to improve the health and well-being of individuals, and to promote the sanctity and preservation of life, in the communities we serve. baptist…

Health
How this is measured
The grantee most central to the portfolio’s shape is Community Foundation of the Florida Keys; the most unlike its peers is Grace Jones Community Center 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

8 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.

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

2
Load-bearing (≥25% of a budget)
3
Early backer (in before they grew)
8/8
Grantees still filing
6/8
Grew since first funded

Where the money sits, by cause and then by grantee

New Hampshire Charitable Foundation: $4,000,000 · PhilanthropyNew Hampshire Charitable FoundationCOMMUNITIES FOUNDATION OF OKLAHOMA: $4,000,000 · PhilanthropyCOMMUNITIES FOUNDATION OF OKLAHOMACOMMUNITY FOUNDATION OF THE FLORIDA KEYS: $1,487,500 · PhilanthropyCOMMUNITY FOUNDATION OF THE FLORIDA KEYSUNITED WAY OF COLLIER AND THE KEYS INC: $1,487,500 · PhilanthropyUNITED WAY OF COLLIER AND THE KEYS INCBaptist Health South Florida Foundation Inc: $1,950,000 · HealthBaptist Health …GRACE JONES COMMUNITY CENTER INC: $735,000 · Human ServicesGRACE JON…FLORIDA KEYS CHILDRENS SHELTER INC: $485,000 · Human ServicesFLORIDA K…+1 more: $10,000 · Human Services
Philanthropy$10,975,000Health$1,950,000Human Services$1,230,000

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 budgetNew Hampshire Charitable Foundation: $4,000,000 over 2y, 3.2% of budgetCOMMUNITIES FOUNDATION OF OKLAHOMA: $4,000,000 over 2y, 2.6% of budgetBaptist Health South Florida Foundation Inc: $1,950,000 over 2y, 3.5% of budgetCOMMUNITY FOUNDATION OF THE FLORIDA KEYS: $1,487,500 over 1y, 23% of budgetUNITED WAY OF COLLIER AND THE KEYS INC: $1,487,500 over 1y, 48% of budgetGRACE JONES COMMUNITY CENTER INC: $735,000 over 8y, 67% of budgetFLORIDA KEYS CHILDRENS SHELTER INC: $485,000 over 8y, 8.6% of budgetDOMESTIC ABUSE SHELTER INC: $10,000 over 1y, 1.3% 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.

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.

Ocean Reef Community …Amazonsmile Foundation
Ocean Reef Community Foundation IncFL13.6× affinity4 shared granteesties to 1 of 1Hover any node to trace its alignments.Compare side by side →

Open a dossier: Ocean Reef Community Foundation Inc · Amazonsmile 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 Katherine Wells Macmillan Foundation funds: left to right is the share of its income from government, bottom to top the share from Katherine Wells Macmillan Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 20%5%19%42%75%funder's share of their income ↑0%8%15%22%30%share of the org’s income from government →median 23%
  • Domestic Abuse Shelter Inc: 23% of income from government
  • Florida Keys Childrens Shelter Inc: 19% of income from government
no gov moneyreceives it· size = income
2get no government money at all
4report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–30%
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 Katherine Wells Macmillan Foundation?

Find your warmest path to Katherine Wells Macmillan 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 8 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 Katherine Wells Macmillan’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