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· Private foundation

The William F O'Connor Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$260k
Granted FY2025still arriving
27
Grants FY2025still arriving
5
States reached
$110k
Largest
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2021 to 2025.

Health$2.1MArts & Culture$585kPhilanthropy$214kEducation$179kHuman Services$158kReligion$42kFood & Nutrition$20kCrime & Legal$8kOther$0
02FY2025 · 27 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k19 grants · $60k
  • $10k–50k7 grants · $90k
  • $50k–250k1 grant · $110k
$5,000
Median grant
5
States reached
$9.9M
Total assets
Largest grants
RecipientAmount
WTTW CHANNEL 11$110,000
THE BRIDGE FUND$25,000
ST COLETTA'S OF ILLINOIS FOUNDATION$15,000
MISSION OF OUR LADY OF MERCY-MERCY HOME FOR BOYS AND GIRLS$10,000
CHICAGO JESUIT ACADEMY$10,000
CLUB OF HEARTS INC$10,000
ST PATRICK HIGH SCHOOL$10,000
READING POWER INC$10,000
HAZELDEN BETTY FORD$7,500
LOYOLA ACADEMY$7,000
BIG SHOULDERS FUND$5,000
CHICAGO HISTORY MUSEUM$5,000
THE MANNA FOOD PROJECT$5,000
LITTLE SISTERS OF THE POOR$5,000
BROTHER DAN'S FOOD PANTRY$5,000
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, $125k) land where the poverty rate runs at 14%, 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%CLUB OF HEARTS INC: $15k → 14%CLUB OF HEARTS INC: $10k → 14%MISERICORDIA FAMILY ASSOCIATION: $5k → 14%MISERICORDIA FAMILY ASSOCIATION: $5k → 14%MISERICORDIA FAMILY ASSOCIATION: $5k → 14%MISERICORDIA FAMILY ASSOCIATION: $5k → 14%MISERICORDIA FAMILY ASSOCIATION: $5k → 14%ST COLETTA'S OF ILLINOIS FOUNDATION: $15k → 14%ST COLETTA'S OF ILLINOIS FOUNDATION: $15k → 14%ST COLETTA'S OF ILLINOIS FOUNDATION: $15k → 14%ST COLETTA'S OF ILLINOIS FOUNDATION: $15k → 14%ST COLETTA'S OF ILLINOIS FOUNDATION: $15k → 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.
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.

97%of every dollar goes to organizations it has funded before.
$1.1M · 28 repeat orgs$38k to everyone else

28 repeat relationships: 23 still active in FY2025, 5 since wound down; 3 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

28
8

Total granted

$1.1M
$25k

Median revenue growth · since first grant

+9%
+14%

Still filing today

46%
25%

New vs renewed · share of each year

In FY2025, 95% of grant dollars renewed an existing relationship; $13k went to new ones.

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

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

’21’22’23’24’25
Human ServicesEducationHealthYouth DevelopmentOther
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

  • TC
    The Corporation of Saint Mary's College Notre Dame
    3× · 2021–2023 · $36k · revenue +15%
  • CO
    CLUB OF HEARTS INC
    2× · 2024–2025 · $25k · revenue +9%
  • MISERICORDIA FOUNDATION
    5× · 2021–2025 · $25k · revenue +680%

Funded once

  • MH
    MERCY HOME FOR BOYS AND GIRLS
    one grant, 2021 · $5k
  • OL
    OUR LADY OF MERCY PARISH
    one grant, 2021 · $5k
  • IC
    IMMACULATE CONCEPTION CHURCH
    one grant, 2021 · $5k
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
Foundation for Catholic Secondary Education of Greater Grand Rapids Inc

The foundation for catholic secondary education exists to financially support education programs of catholic central high school and west catholic high through tuition assistance, faculty enhancement and program/facilities

Education
2
Notre Dame Schools

Notre dame schools will engage students from preschool through high school in an exceptional catholic education. we will focus on loving, respecting, and educating all to discover and develop their god-given talents. we will challenge our…

—
3
Misericordia Home

The mission of misericordia home is to support children and adults with intellectual and developmental disabilities who choose our community by providing the highest quality residential, training, and employment services. we provide the…

Human Services
4
Madonna Manor Inc

As an affiliate of commonspirit health, we make the healing presence of god known in our world by improving the health of the people we serve, especially those who are vulnerable, while we advance social justice for all.

Health
5
Marist H S Chicago-Foundation Mr Marion Klatka

Raise money to support marist high school

Education
6
The Chicago Home for Incurables

The primary purpose of the chicago home for incurables, ("the home"), is to provide financial support to the university of chicago for the operation of patient care facilities and funding of research of incurable diseases at the university…

Health
7
Cardinal Stritch University Inc

Cardinal stritch university is a comprehensive, coeducational, institution offering educational programs leading to associate, baccalaureate, masters and doctoral degrees in a variety of disciplines provided through its three colleges:…

Education
8
Trustees of the College of the Holy Cross

College of the holy cross is a private, jesuit, catholic, liberal arts college (see schedule o).

Education
9
University of Dayton

The university of dayton is a top-tier independent, catholic research educational institution founded in 1850. the primary exempt purpose is providing post secondary education through undergraduate, graduate, doctoral and continuing…

Education
10
St Mary's University

St. marys university, as a catholic marianist university, fosters the formation of people in faith and educates leaders for the common good through community, integrated liberal arts and professional education, and academic excellence.

—
11
St Mary's Foundation Inc

Through our exceptional health care services, we reveal the healing presence of god.

—
12
Benedictine Foundation

The benedictine foundation (formerly benedictine health system foundation) was established to coordinate, encourage, motivate and support the fund development activity effort within benedictine health system and its supported organizations.

—
How this is measured
The grantee most central to the portfolio’s shape is Misericordia Foundation; the most unlike its peers is Blood Cancer United 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

18 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. 18 of the 42 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)
18/18
Grantees still filing
9/18
Grew since first funded

Where the money sits, by cause and then by grantee

MAYO CLINIC: $2,000,000 · HealthMAYO CLINIC+2 more: $24,000 · HealthWTTW CHANNEL 11: $550,000 · OtherWTTW CHANNEL 11THE BRIDGE FUND: $62,000 · OtherTHE BRIDGE FUNDMISSION OF OUR LADY OF MERCY-MERCY HOME FOR BOYS AND GIRLS: $50,000 · OtherMISSION OF OUR LADY OF MERCY-ME…HAZELDEN BETTY FORD: $37,500 · OtherLOYOLA ACADEMY: $35,500 · Other+26 more: $202,000 · Other+26 moreGRAND HAVEN AREA COMMUNITY FOUNDATION INC: $150,000 · Philanthropy+1 more: $2,000 · PhilanthropyST COLETTAS OF ILLINOIS FOUNDATION: $75,000 · Human ServicesCLUB OF HEARTS INC: $25,000 · Human ServicesMISERICORDIA FOUNDATION: $25,000 · Human ServicesThe Corporation of Saint Mary's College Notre Dame: $36,000 · EducationBig Shoulders Fund: $25,000 · EducationREADING POWER INC: $20,000 · Youth Development
Health$2,024,000Other$937,000Philanthropy$152,000Human Services$125,000Education$61,000Youth Development$20,000

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 budgetMAYO CLINIC: $2,000,000 over 2y, 0.0% of budgetGRAND HAVEN AREA COMMUNITY FOUNDATION INC: $150,000 over 3y, 0.3% of budgetST COLETTAS OF ILLINOIS FOUNDATION: $75,000 over 5y, 1.5% of budgetThe Corporation of Saint Mary's College Notre Dame: $36,000 over 3y, 0.0% of budgetCLUB OF HEARTS INC: $25,000 over 2y, 11% of budgetMISERICORDIA FOUNDATION: $25,000 over 5y, 0.1% of budgetBig Shoulders Fund: $25,000 over 5y, 0.0% of budgetBLOOD CANCER UNITED INC: $21,000 over 4y, 0.0% of budgetREADING POWER INC: $20,000 over 2y, 0.6% of budgetTHE MANNA FOOD PROJECT INC DBA - THE MANNA FOOD PROJECT: $10,000 over 2y, 0.2% of budgetHOPE IGNITES CHICAGO: $7,500 over 5y, 0.1% of budgetDUNEBROOK INC: $7,500 over 2y, 0.3% of budgetBear Necessities Pediatric Cancer Foundation: $3,000 over 1y, 0.2% of budgetBONITA SPRINGS ASSISTANCE OFFICE INC: $2,500 over 2y, 0.2% of budgetDESERT COMMUNITY FOUNDATION: $2,000 over 4y, 0.0% of budgetNORTH SHORE ART LEAGUE: $1,250 over 5y, 0.1% of budgetPALETTE AND CHISEL ACADEMY OF FINE ARTS: $1,250 over 5y, 0.0% of budgetSAFE HAVEN PET RESCUE INC: $1,000 over 1y, 1.1% 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 MAYO CLINIC ↗
  • Who funds GRAND HAVEN AREA COMMUNITY FOUNDATION INC ↗
  • Who funds ST COLETTAS OF ILLINOIS FOUNDATION ↗
  • Who funds The Corporation of Saint Mary's College Notre Dame ↗
  • Who funds CLUB OF HEARTS INC ↗
  • Who funds MISERICORDIA FOUNDATION ↗
  • Who funds Big Shoulders Fund ↗
  • Who funds BLOOD CANCER UNITED INC ↗
  • Who funds READING POWER INC ↗
  • Who funds THE MANNA FOOD PROJECT INC DBA - THE MANNA FOOD PROJECT ↗
  • Who funds HOPE IGNITES CHICAGO ↗
  • Who funds DUNEBROOK INC ↗
  • Who funds Bear Necessities Pediatric Cancer Foundation ↗
  • Who funds BONITA SPRINGS ASSISTANCE OFFICE INC ↗
  • Who funds DESERT COMMUNITY FOUNDATION ↗
  • Who funds NORTH SHORE ART LEAGUE ↗
  • Who funds PALETTE AND CHISEL ACADEMY OF FINE ARTS ↗

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.

AbbVie FoundationIL14.6× affinity6 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: AbbVie Foundation · The Chicago Community Trust · Baird Foundation Inc · Arthur J Gallagher Foundation · Vanguard Charitable Endowment Program · Jpmorgan Chase Foundation · Charities Aid Foundation America · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · Morgan Stanley Global Impact Funding Trust Inc · Natl Christian Charitable Fdn 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 The William F O'Connor Foundation funds: left to right is the share of its income from government, bottom to top the share from The William F O'Connor Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%1%4%8%15%funder's share of their income ↑0%3%5%8%10%share of the org’s income from government →
    no gov moneyreceives it· size = income
    1get 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 · 0–10%
    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 William F O'Connor Foundation?

    Find your warmest path to The William F O'Connor 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 42 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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