Indianapolis Symphony Orchestra Foundation Inc
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.
Indianapolis Symphony Orchestra Foundation Inc at a glance
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.
- Annual giving (2025)
- $9,110,679
- +36.9% vs 2024
- Grants made (2025)
- 1
- +0.0% vs 2024
- Average grant
- $9,110,679
- +36.9% vs 2024
- Median grant
- $9,110,679
- Total assets
- $122,889,898
- +1.5% vs 2024
- Primary geography
- Indiana (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Indianapolis Symphony Orchestra Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Indiana Symphony Society Inc ($9.1M).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was $5M or more: 5 grants of 5 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How Indianapolis Symphony Orchestra Foundation Inc gives
- Giving grew 55% from 2022 to 2025. Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
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.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Indiana Symphony Society Inc Indianapolis, IN | To Fund Operating Expenses, Rent, Education, Community Engagement and Artistic Endeavors | $9,110,679 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $122,889,898 | $9,112,572 | $11,319,341 | $9,110,679 | 1 | $6,960,110 |
| 2024 | $121,112,166 | $8,910,190 | $8,504,642 | $6,653,048 | 1 | $4,709,318 |
| 2023 | $114,922,418 | $7,393,933 | $7,777,735 | $6,290,436 | 1 | $5,379,874 |
| 2022 | $117,619,288 | $9,602,897 | $8,157,454 | $5,880,307 | 1 | $8,142,825 |
| 2021 | $120,040,413 | $10,534,808 | $7,795,739 | $5,737,047 | 1 | $8,954,275 |
| 2020 | $99,982,035 | $7,983,891 | $8,101,562 | $6,900,000 | 1 | $5,236,928 |
| 2019 | $98,318,900 | $7,707,532 | $9,264,073 | $7,781,540 | 2 | $3,833,027 |
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.
Focus Areas
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.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2019 (received by the IRS June 8, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS July 1, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS June 13, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS July 17, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS July 15, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS June 13, 2025)
- Added Form 990 for fiscal year 2025 (received by the IRS July 13, 2026)
- IRS filings on file for fiscal years 2019–2024
Live grants for the work Indianapolis Symphony Orchestra Foundation Inc funds
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