Indianapolis Symphony Orchestra Foundation Inc

Public charity · Grantmaker Indianapolis, IN EIN: 35-1812636

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.

Key facts about Indianapolis Symphony Orchestra Foundation Inc

In short: Indianapolis Symphony Orchestra Foundation Inc gave $9.1M across 1 grant in 2025 (avg $9.1M), mostly in Indiana. Source: 2025 IRS Form 990.

EIN
35-1812636
Latest 990 filing
Form 990, 2025
Annual giving (2025)
$9,110,679
Grants made (2025)
1
Average grant
$9,110,679
Median grant
$9,110,679
Total assets
$122,889,898
Primary geography
Indiana (100% of itemized 2025 grant dollars)

Data from IRS Form 990, 2025; updated September 2026.

Financial Overview

From 2025 IRS Form 990 · View filing

Total Assets

$122.9M

+1.5% YoY

Annual Giving

$9.1M

+36.9% YoY

Grant Count

1

+0.0% YoY

Avg Grant Size

$9.1M

+36.9% YoY

How Indianapolis Symphony Orchestra Foundation Inc gives

  • Giving grew 55% from 2022 to 2025. Method

From the foundation's IRS Form 990 filings. Methodology.

About Indianapolis Symphony Orchestra Foundation Inc

Based on IRS filings

Indianapolis Symphony Orchestra Foundation Inc is a public charity focused on Arts, Culture & Humanities, based in Indianapolis, IN. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $122.9M in total assets. In 2025, it awarded 1 grant totaling $9.1M. Net investment income was $7.0M.

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

1state

Share of the 2025 grant dollars on its one itemized grant.

States

Cities

Indianapolis

Giving Over Time

Total grant dollars and number of grants per year

$0$2.5M$5M$7.5M$10M2 grants2019 1 grant2020 1 grant2021 1 grant2022 1 grant2023 1 grant2024 1 grant2025

From 2019 to 2025, annual grant giving ranged from $5.7M (2021) to $9.1M (2025). In 2025 it made 1 grant totaling $9.1M.

Grant Insights

How this funder distributes its grants

Top Recipients

Top recipient in 2025

Indiana Symphony Society Inc: $9.1MIndiana Symphony Society Inc$9.1M

The largest 2025 recipient was Indiana Symphony Society Inc ($9.1M).

Grant Size Distribution

5 grants across all recorded years

<$50K$50–100K$100–250K$250–500K$500K–1M$1–5M5$5M+

The most common grant size was $5M or more: 5 grants of 5 (100%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Indiana Symphony Society Inc Indianapolis, INTo Fund Operating Expenses, Rent, Education, Community Engagement and Artistic Endeavors$9,110,679

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Net Investment Income
$0$5M$10M$15M2019 2020 2021 2022 2023 2024 2025
Metric202520242023
Total Assets$122,889,898$121,112,166$114,922,418
Revenue$9,112,572$8,910,190$7,393,933
Expenses$11,319,341$8,504,642$7,777,735
Net Investment Income$6,960,110$4,709,318$5,379,874

Data update history

When this profile's IRS filing data changed on Grantable

  1. Updated Form 990 for fiscal year 2019 (received by the IRS June 8, 2020)
  2. Updated Form 990 for fiscal year 2020 (received by the IRS July 1, 2021)
  3. Updated Form 990 for fiscal year 2021 (received by the IRS June 13, 2022)
  4. Updated Form 990 for fiscal year 2022 (received by the IRS July 17, 2023)
  5. Updated Form 990 for fiscal year 2023 (received by the IRS July 15, 2024)
  6. Updated Form 990 for fiscal year 2024 (received by the IRS June 13, 2025)
  7. Added Form 990 for fiscal year 2025 (received by the IRS July 13, 2026)
  8. IRS filings on file for fiscal years 2019–2024

Leadership & Key People

Officers and directors from IRS filings

Indianapolis Symphony Orchestra Foundation Inc is led by Mark Mutz, Chair since 2025 (on filings since 2020); none of the 9 officers listed in 2025 report compensation.

Officers on the 2025 filing

  • Mark Mutz

    Chair

    Director → Chair, 2025

    On filings since 2020

    2 hrs/week

    No compensation reported

  • John R. Thornburgh

    Director

    Chair → Director, 2025

    On filings since 2019

    2 hrs/week

    No compensation reported

  • Martha Lamkin

    Director

    On filings since 2019

    2 hrs/week

    No compensation reported

  • Scott Davis

    Director

    On filings since 2019

    2 hrs/week

    No compensation reported

  • Susan Ridlen

    Director

    On filings since 2019

    2 hrs/week

    No compensation reported

  • Tom Grein

    Director

    On filings since 2019

    2 hrs/week

    No compensation reported

  • Mark A. Stempel

    Director

    New on the 2025 filing

    2 hrs/week

    No compensation reported

  • Jill Margetts

    Treasurer

    On filings since 2019

    2 hrs/week

    No compensation reported

  • Robert D. Ramsey

    Secretary

    Director → Secretary, 2021

    On filings since 2019

    2 hrs/week

    No compensation reported

Former officers (3)
  • Former: Robert H. Reynolds (2019–2020) — Secretary
  • Former: Steve Hamilton (2019–2020) — Assistant Treasurer · Filing note: Retired 92019
  • Former: Kent Hawryluk (2019) — Director

Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.

Frequently asked questions about Indianapolis Symphony Orchestra Foundation Inc

How much does Indianapolis Symphony Orchestra Foundation Inc give each year?

Indianapolis Symphony Orchestra Foundation Inc gave $9.1M across 1 grant in 2025, according to its 2025 IRS Form 990. In 2024 it gave $6.7M across 1 grant.

How large is Indianapolis Symphony Orchestra Foundation Inc?

Indianapolis Symphony Orchestra Foundation Inc reported $122.9M in total assets on its 2025 IRS Form 990. Its revenue that year was $9.1M.

What is Indianapolis Symphony Orchestra Foundation Inc?

Indianapolis Symphony Orchestra Foundation Inc is a public charity focused on Arts, Culture & Humanities, based in Indianapolis, IN. It holds $122.9M in total assets as of 2025.

Where does Indianapolis Symphony Orchestra Foundation Inc operate?

Indianapolis Symphony Orchestra Foundation Inc has awarded grants in Indiana.

What is Indianapolis Symphony Orchestra Foundation Inc's EIN?

Indianapolis Symphony Orchestra Foundation Inc's EIN (Employer Identification Number) is 35-1812636. IRS Form 990 filing data is available on this page for 2019–2025.

Data last updated September 2026. Sourced from IRS Form 990 filings.

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