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· Private foundation

Addison P Cook III Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$420k
Granted FY2025still arriving
23
Grants FY2025still arriving
1
States reached
$55k
Largest
01What it funds
0194% classified

What it funded, over time

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

Arts & Culture$890kEducation$324kPhilanthropy$146kAnimals$103kReligion$100kHuman Services$74kHousing & Shelter$65kRecreation & Sports$65kOther$0
02FY2025 · 23 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k5 grants · $22k
  • $10k–50k16 grants · $293k
  • $50k–250k2 grants · $105k
$15,000
Median grant
1
States reached
$4.0M
Total assets
Largest grants
RecipientAmount
ELLA SHARP MUSEUM$55,000
JACKSON COUNTY ANIMAL SHELTER$50,000
LOST RAILWAY MUSEUM$30,000
CAMP LIBERTY INC$25,000
JACKSON SYMPHONY ORCHESTRA$25,000
RISE ABOVE$25,000
MICHIGAN THEATRE OF JACKSON$25,000
JUNIOR ACHHIEVEMENT OF MI EDGE INC$25,000
SOAR CAFE FARMS$20,000
JACKSON INTERFAITH SHELTER$20,000
JACKSON COLLEGE FOUNDATION$15,000
JACKSON SCHOOL FOR THE ARTS$15,000
COUNCIL PREVENTION OF CHILD ABUSE$14,000
CASCADES HUMANE SOCIETY$13,500
FAMILY SERVICES OF JACKSON$10,000
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 (FY21–25, $65k) land where the poverty rate runs at 13%, against an area that typically sits at 6%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 6%CAMP LIBERTY INC: $25k → 13%JACKSON YMCA: $40k → 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
repeat funding

Who it funds again

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

87%of every dollar goes to organizations it has funded before.
$1.7M · 26 repeat orgs$253k to everyone else

Grantees it renews have grown median revenue +48% since the first grant, against +22% for those funded once.

26 repeat relationships: 18 still active in FY2025, 8 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

26
2

Total granted

$1.7M
$140k

Median revenue growth · since first grant

+48%
+22%

Still filing today

42%
50%

New vs renewed · share of each year

In FY2025, 73% of grant dollars renewed an existing relationship; $113k 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
Arts & CultureEducationHuman ServicesAnimalsEnvironmentHousing & ShelterOther
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

  • TM
    THE MICHIGAN THEATRE OF JACKSON INC
    9× · 2017–2025 · $224k · revenue +336%
  • JC
    JACKSON COMMUNITY COLLEGE FOUNDATION
    9× · 2017–2025 · $120k · revenue +93%
  • JS
    JACKSON SYMPHONY ORCHESTRA ASSOCIATION INC
    9× · 2017–2025 · $105k · revenue +48%

Funded once

  • SP
    ST PAUL EPISCOPAL CHURCH - JACKSON
    one grant, 2024 · $100k
  • JY
    Jackson YMCA Inc
    one grant, 2021 · $40k · revenue +22%
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
Jackson Community Ambulance

The mission of jackson community ambulance is to provide high-quality out-of-hospital care and transportation services to the communities we serve.

Public Safety & Disaster
2
Jackson Arts Council

To connect and strengthen the arts through strengthening and expanding the arts organizations in the community, and increasing arts education opportunities, arts advocacy, and communications and commnication services.

Arts & Culture
3
Jackson Electric Membership Corporation

To provide the best possible electric service to all who desire it within the system area at a reasonable cost consistent with the highest standards of service.

—
4
Jackson County Historical Society

To preserve and operate historic sites for public tours and research. to preserve historic documents for public inspection.

Arts & Culture
5
The Jackson Foundation
Philanthropy
6
Jackson Symphony Association

The Jackson Symphony enriches and inspires audiences through the power of live orchestral music.

Arts & Culture
7
Jackson County Education Coalition

The jackson county education coalition is a county wide partnership of education, industry, and community leaders focused on aligning and integrating the county's learning system with economic growth and a high quality of life in jackson…

Education
8
Jackson County Chamber of Commerce

Our mission is to support commerce and promote growth to enhance the quality of life in jackson county.

Community Improvement
9
St Andrews Episcopal Church Jackson
—
10
Jackson County Chamber of Commerce

To be a leading driver and advocate for community and economic development in jackson county.

—
11
Mississippi Children's Museum

We create unparalleled experiences to inspire excellence and a lifelong joy of learning.

Arts & Culture
12
Jacksonville Area Chamber of Commerce

To improve the business climate, promote economic development, and enhance the quality of life in the jacksonville area. the jacksonville area chamber of commerce encourages businesses by building relationships to create a vibrant tomorrow.

—
How this is measured
The grantee most central to the portfolio’s shape is Jackson Ymca Inc; the most unlike its peers is Lost Railway Museum. 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

15 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. 15 of the 34 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)
6
Early backer (in before they grew)
15/15
Grantees still filing
9/15
Grew since first funded

Where the money sits, by cause and then by grantee

LOST RAILWAY MUSEUM: $245,000 · Arts & CultureLOST RAILWAY MUSEUMTHE MICHIGAN THEATRE OF JACKSON INC: $223,500 · Arts & CultureTHE MICHIGAN THEATRE OF JACKSON INCELLA SHARP MUSEUM ASSOCIATION OF JACKSON: $195,000 · Arts & CultureELLA SHARP MUSEUM ASSOCIATION OF JACKSONJACKSON SYMPHONY ORCHESTRA ASSOCIATION INC: $105,000 · Arts & CultureJACKSON SYMPHONY ORCHESTRA ASSOCIATION INC+1 more: $19,000 · Arts & CultureST PAUL EPISCOPAL CHURCH - JACKSON: $100,000 · OtherST PAUL EPISCOPAL CHURCH - JACKSONJACKSON SCHOOL FOR THE ARTS: $93,500 · OtherJACKSON SCHOOL FOR THE ARTSWM SPARKS CASCADE FALLS FUND: $70,000 · OtherWM SPARKS CASCADE FALLS FUNDLUMEN CHRISTI HIGH SCHOOL: $65,000 · OtherLUMEN CHRISTI HIGH SCHOOLJACKSON DISTRICT LIBRARY: $53,000 · OtherJACKSON DISTRICT LIBRARYCOLLEGE CAREER ACCESS CENTER: $53,000 · OtherCOLLEGE CAREER ACCESS CENTERCOUNTY OF JACKSON MICHIGAN DEPT ON AGING: $50,000 · OtherCOUNTY OF JACKSON MICHIGAN DEPT ON AGINGJACKSON SOUTHWEST LITTLE LEAGUE: $40,000 · OtherSOAR CAFE FARMS: $40,000 · OtherJUNIOR ACHHIEVEMENT OF MI EDGE INC: $40,000 · OtherFAMILY SERVICES OF JACKSON: $34,000 · OtherTHE DAHLEM CONSERVANCY: $30,000 · Other+10 more: $131,650 · Other+10 moreJACKSON COMMUNITY COLLEGE FOUNDATION: $120,000 · EducationMichigan Colleges Alliance: $17,500 · EducationJackson Community Foundation: $69,000 · PhilanthropyJackson Interfaith Shelter: $65,000 · Housing & ShelterJackson YMCA Inc: $40,000 · Human ServicesCAMP LIBERTY INC: $25,000 · Human ServicesCASCADES HUMANE SOCIETY INC: $53,000 · Animals
Arts & Culture$787,500Other$800,150Education$137,500Philanthropy$69,000Housing & Shelter$65,000Human Services$65,000Animals$53,000

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

25%50%75%100%$100k$1.0Mgrantee revenue →↑ funder's share of their budgetLOST RAILWAY MUSEUM: $245,000 over 9y, 17% of budgetTHE MICHIGAN THEATRE OF JACKSON INC: $223,500 over 9y, 5.4% of budgetELLA SHARP MUSEUM ASSOCIATION OF JACKSON: $195,000 over 9y, 3.6% of budgetJACKSON COMMUNITY COLLEGE FOUNDATION: $120,000 over 9y, 1.8% of budgetJACKSON SYMPHONY ORCHESTRA ASSOCIATION INC: $105,000 over 9y, 1.2% of budgetJackson Community Foundation: $69,000 over 6y, 0.6% of budgetJackson Interfaith Shelter: $65,000 over 5y, 0.9% of budgetCASCADES HUMANE SOCIETY INC: $53,000 over 8y, 0.6% of budgetJACKSON SOUTHWEST LITTLE LEAGUE: $40,000 over 4y, 18% of budgetJackson YMCA Inc: $40,000 over 1y, 1.0% of budgetTHE DAHLEM CONSERVANCY: $30,000 over 2y, 2.7% of budgetCAMP LIBERTY INC: $25,000 over 1y, 18% of budgetRISE ABOVE: $25,000 over 1y, 14% of budgetTHE JACKSON MICHIGAN CHORALE: $19,000 over 6y, 6.9% of budgetMichigan Colleges Alliance: $17,500 over 7y, 0.1% 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 LOST RAILWAY MUSEUM ↗
  • Who funds THE MICHIGAN THEATRE OF JACKSON INC ↗
  • Who funds ELLA SHARP MUSEUM ASSOCIATION OF JACKSON ↗
  • Who funds JACKSON COMMUNITY COLLEGE FOUNDATION ↗
  • Who funds JACKSON SYMPHONY ORCHESTRA ASSOCIATION INC ↗
  • Who funds Jackson Community Foundation ↗
  • Who funds Jackson Interfaith Shelter ↗
  • Who funds CASCADES HUMANE SOCIETY INC ↗
  • Who funds JACKSON SOUTHWEST LITTLE LEAGUE ↗
  • Who funds Jackson YMCA Inc ↗
  • Who funds THE DAHLEM CONSERVANCY ↗
  • Who funds CAMP LIBERTY INC ↗
  • Who funds RISE ABOVE ↗
  • Who funds THE JACKSON MICHIGAN CHORALE ↗
  • Who funds Michigan Colleges Alliance ↗

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.

The Alvin L Glick FoundationMI36.7× affinity15 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Alvin L Glick Foundation · Jackson Community Foundation · Consumers Energy Foundation · Phil & Pat Willis Foundation · Lavery Foundation · The Hurst Foundation · Louis Glick Memorial & Charitable Trust · The L H Field Family Foundation · John George Jr Paragraph X Trust · Wa Foote Memorial Hospital · Philip J Curtis Foundation · Melling Family 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 Addison P Cook III Foundation funds: left to right is the share of its income from government, bottom to top the share from Addison P Cook III Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%1%5%11%20%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    5report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–40%
    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 Addison P Cook III Foundation?

    Find your warmest path to Addison P Cook III 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 34 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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