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INDIANAPOLIS SYMPHONY ORCHESTRA FOU NDATION INC

EIN 35-1812636 INDIANAPOLIS, IN

Revenue 2024
$9,112,572
Expenses 2024
$11,319,341

Program services were 81.2% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
A110
Classification
1000
Street
32 E WASHINGTON ST STE 600

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).

Mission and programs · 2024

Mission

THE INDIANAPOLIS SYMPHONY ORCHESTRA FOUNDATION, INC. (THE "ISO FOUNDATION") WAS FORMED IN SEPTEMBER 1990 FOR THE PURPOSE OF EDUCATING THE PUBLIC AND PROVIDING FINANCIAL AND OTHER SUPPORT TO THE INDIANA SYMPHONY SOCIETY, INC. (THE "SOCIETY"), AN INDIANA NOT-FOR-PROFIT CORPORATION THAT OPERATES THE INDIANAPOLIS SYMPHONY ORCHESTRA. IT IS THE GENERAL PRACTICE OF THE SOCIETY TO TRANSFER CONTRIBUTIONS RAISED, OTHER THAN ANNUAL FUND CONTRIBUTIONS, TO THE ISO FOUNDATION UNLESS A DONOR SPECIFICALLY REQUIRES THE CONTRIBUTION TO BE MAINTAINED BY THE SOCIETY. ALL FUNDRAISING EXPENSES ARE RECORDED AND REPORTED IN THE SOCIETY'S ACCOUNTS.

Activities or mission (Part I)

TO EDUCATE THE PUBLIC AND PROVIDE FINANCIAL AND OTHER SUPPORT TO THE INDIANA SYMPHONY SOCIETY, INC.

  • Provide financial support to the Indiana Symphony Society, Inc. to assist with educational, artistic, operating, and facility purposes as well as community service to the greater Indianapolis area.

    Expenses $9,191,728 · Grants $9,110,679 · Revenue $1,250,000

As filed on the 2024 return.

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.

  • Jill Margetts

    TREASURER

    Total calculated
    $0
    Hours/week
    2

  • Mark Mutz

    CHAIR

    Total calculated
    $0
    Hours/week
    2

  • Robert D Ramsey

    SECRETARY

    Total calculated
    $0
    Hours/week
    2

  • John R Thornburgh

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2

  • Mark A Stempel

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2

  • Martha Lamkin

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2

  • Scott Davis

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2

  • Susan Ridlen

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2

  • Tom Grein

    DIRECTOR

    Total calculated
    $0
    Hours/week
    2

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
    $9,112,572
    Expenses
    $11,319,341
    Contributions
    $867,117
    Grants paid
    $9,110,679
  • 2023
    Revenue
    $8,910,190
    Expenses
    $8,504,642
    Contributions
    $2,918,147
    Grants paid
    $6,653,048
  • 2022
    Revenue
    $7,393,933
    Expenses
    $7,777,735
    Contributions
    $728,374
    Grants paid
    $6,290,436

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

  • 2024 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2023 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2022 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2021 · 990

    Revenue
    $9,602,897
    Expenses
    $8,157,454
    Assets (EOY)
    $117,619,288

  • 2021 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2020 · 990

    Revenue
    $10,534,808
    Expenses
    $7,795,739
    Assets (EOY)
    $120,040,413

  • 2020 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2019 · 990

    Revenue
    $7,983,891
    Expenses
    $8,101,562
    Assets (EOY)
    $99,982,035

  • 2018 · 990

    Revenue
    $7,707,532
    Expenses
    $9,264,073
    Assets (EOY)
    $98,318,900

  • 2017 · 990

    Revenue
    $13,287,556
    Expenses
    $7,908,184
    Assets (EOY)
    $101,397,219

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. Showing the 10 most recent; the API carries the rest.

Grants made

Where these grants went next →

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2024 return

Declared as related by

Taxable family

From Schedule R Parts I, III and IV: entities that legally are the filer, and taxable partnerships, corporations and trusts it is related to. These record ownership and control, not shared board members or money.

Related corporations and trusts on its 2024 return

  • CHARITABLE REMAINDER TRUSTS (2)

    Trust · INVESTMENTS · IN

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 13 October 2026, under deductibility SO.

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 13 October 2026 and read 29 October 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.