The Shirley and Bill Koloseike Fdn
The Shirley and Bill Koloseike Fdn is a private foundation, based in Downers Grove, IL. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $8.5M in total assets. In 2025, it awarded 2 grants totaling $300K. Net investment income was $648K.
The Shirley and Bill Koloseike Fdn at a glance
In short: The Shirley and Bill Koloseike Fdn gave $300K across 2 grants in 2025 (avg $150K), mostly in Illinois. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $300,000
- +114.3% vs 2024
- Grants made (2025)
- 2
- -33.3% vs 2024
- Average grant
- $150,000
- +221.4% vs 2024
- Median grant
- $150,000
- Total assets
- $8,547,474
- +4.1% vs 2024
- Primary geography
- Illinois (67% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who The Shirley and Bill Koloseike Fdn funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2025
The largest 2025 recipient was University of Chicago ($200K). Together the top 2 received $300K.
Grant Size Distribution
8 grants across all recorded years
The most common grant size was in the $100–250K range: 6 grants of 8 (75%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 2 itemized grants.
Cities
How The Shirley and Bill Koloseike Fdn gives
- Giving grew 200% from 2022 to 2025. Method
- In 2025 it paid out 60% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
From the foundation's IRS Form 990-PF 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 $100K (2021) to $300K (2025). In 2025 it made 2 grants totaling $300K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Chicago Chicago, IL | Unrestricted Charitable Grant | $200,000 |
| Breakthrough T1D (Formerly JDRF) New York, NY | Unrestricted Charitable Grant | $100,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $8,547,474 | $760,137 | $424,723 | $300,000 | 2 | $305,779 | $648,208 | $506,609 |
| 2024 | $8,213,008 | $491,298 | $212,468 | $140,000 | 3 | $148,455 | $292,190 | $464,561 |
| 2023 | $7,935,106 | $580,444 | $141,827 | $100,000 | 1 | $104,057 | $97,513 | $389,807 |
| 2022 | $7,491,008 | $1,021,311 | $132,751 | $100,000 | 1 | $100,000 | $204,911 | $357,683 |
| 2021 | $6,603,340 | $1,898,822 | $137,024 | $100,000 | 1 | $100,000 | $714,083 | $352,571 |
| 2020 | $4,948,224 | $242,665 | $175,274 | $150,000 | 2 | — | $216,182 | $265,090 |
| 2019 | $4,879,024 | $270,651 | $168,802 | $150,000 | 2 | — | $186,468 | $257,232 |
Under IRS private-foundation payout rules, The Shirley and Bill Koloseike Fdn reported a distributable amount of $507K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Shirley and Bill Koloseike Fdn is led by William A. Koloseike, President & Secretary since 2021 (on filings since 2019); none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
William A. Koloseike
President & Secretary
President & Director → President & Secretary, 2021
On filings since 2019
1 hr/week
No compensation reported
Judith A. Spellman
Treasurer
Director → Treasurer, 2021
On filings since 2019
1 hr/week
No compensation reported
Mark J. Koloseike
Vice President
Director → Vice President, 2021
On filings since 2019
1 hr/week
No compensation reported
Nina B. Koloseike
Vice President
Director → Vice President, 2021
On filings since 2019
1 hr/week
No compensation reported
Former officers (2)
- Former: Richard E. Dessimoz (2019–2020) — Secretary
- Former: Theodore E. Cesarz (2019–2020) — Treasurer
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 The Shirley and Bill Koloseike Fdn
How much does The Shirley and Bill Koloseike Fdn give each year?
The Shirley and Bill Koloseike Fdn gave $300K across 2 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $140K across 3 grants.
How large is The Shirley and Bill Koloseike Fdn?
The Shirley and Bill Koloseike Fdn reported $8.5M in total assets on its 2025 IRS Form 990-PF. It paid out $306K in qualifying distributions that year, against a required minimum of $507K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
Where does The Shirley and Bill Koloseike Fdn operate?
The Shirley and Bill Koloseike Fdn has awarded grants in Arizona, Illinois, New York.
What is The Shirley and Bill Koloseike Fdn's EIN?
The Shirley and Bill Koloseike Fdn's EIN (Employer Identification Number) is 26-0752500. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(3)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2019 (received by the IRS July 6, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS August 19, 2026)
- IRS filings on file for fiscal years 2020–2024
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