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AON FOUNDATION

EIN 36-3337340 CHICAGO, IL

Browse the largest nonprofits in Illinois

Revenue 2024
$2,200,139
Expenses 2024
$2,200,052

As filed

Subsection
03
Classification
1000
Street
200 E RANDOLPH STREET

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

6 other organizations in the IRS Business Master File list the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Carolyn Barry Frost

    PRESIDENT & TREASURER

    Total calculated
    $0
    Hours/week
    30
  • Darren Zeidel

    SECRETARY

    Total calculated
    $0
    Hours/week
    1
  • Andy Weitz

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Gregory C Case

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1
  • Christa Davies

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $2,200,139
    Expenses
    $2,200,052
    Contributions
    $2,200,139
    Grants paid
    $2,200,052
  • 2023
    Revenue
    $2,308,928
    Expenses
    $2,260,028
    Contributions
    $2,308,928
    Grants paid
    $2,260,018
  • 2022
    Revenue
    $2,238,961
    Expenses
    $2,239,035
    Contributions
    $2,238,961
    Grants paid
    $2,239,035

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990-PF

    Revenue
    $2,351,136
    Expenses
    $2,351,143
    Assets (EOY)
    $1,080
  • 2020 · 990-PF

    Revenue
    $2,412,091
    Expenses
    $2,412,075
    Assets (EOY)
    $1,087

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Grants paid

From Part XV of the 2024 Form 990-PF , the newest this foundation filed that we hold.

  • AMERICAN RED CROSS GREATER CHICAGO CHAPTER

    $500,000

    CHICAGO, IL GENERAL OPERATING SUPPORT

  • UNITED WAY OF METROPOLITAN CHICAGO

    $250,000

    CHICAGO, IL GENERAL OPERATING SUPPORT

  • AMERICAN ONLINE GIVING FOUNDATION INC

    $166,924

    NEWARK, DE FACILITATE DONATIONS TO REGISTERED CHARITIES

  • UNIVERSITY OF NOTRE DAME DU LAC

    $100,000

    NOTRE DAME, IN GENERAL OPERATING SUPPORT

  • WORLD BUSINESS CHICAGO

    $100,000

    CHICAGO, IL GENERAL OPERATING SUPPORT

  • AMERICAN ONLINE GIVING FOUNDATION INC

    $75,725

    NEWARK, DE FACILITATE DONATIONS TO REGISTERED CHARITIES

  • FACING HISTORY AND OURSELVES INC

    $75,000

    BOSTON, MA GENERAL OPERATING SUPPORT

  • AMERICAN ONLINE GIVING FOUNDATION INC

    $71,114

    NEWARK, DE FACILITATE DONATIONS TO REGISTERED CHARITIES

  • ST LOUIS UNIVERSITY

    $70,000

    ST LOUIS, MO GENERAL OPERATING SUPPORT

  • AMERICAN ONLINE GIVING FOUNDATION INC

    $67,415

    NEWARK, DE FACILITATE DONATIONS TO REGISTERED CHARITIES

The 10 largest to organizations. The filing page shows this return's totals, and the API serves every grant row.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 11 November 2026, under deductibility PF.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.