Nonprofit · EIN 37-1328048
HIERONYMUS MUELLER FAMILY FOUNDATION
Tax-exempt · DECATUR, IL 62522
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $392,850 | $324,484 | $68,366 | $4,692,461 | $9,080 | $4,683,381 |
| December 31, 2024 | 990-PF | $302,813 | $313,794 | -$10,981 | $4,618,259 | $43,244 | $4,575,015 |
| December 31, 2023 | 990-PF | $160,515 | $316,677 | -$156,162 | $4,629,095 | $3,099 | $4,625,996 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $26,595
- Dividends
- $162,385
- Net gain from sales of assets
- $198,295
- Other income
- $5,532
Expenses
- Grants and similar amounts paid
- $0
- Salaries, compensation and benefits (total)
- $147,864
- Disbursements for charitable purposes
- $246,434
- Excise tax on investment income
- $4,679
Balance sheet and other
- Total assets, start of year
- $4,618,259
- Total assets, end of year
- $4,692,461
- Total liabilities, end of year
- $9,080
- Net assets, end of year
- $4,683,381
- Fair market value of assets
- $6,602,545
- Qualifying distributions
- $347,334
- Net investment income
- $360,680
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990-PF for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KATHERINE UNRUH 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR Highest-paid employee | 40 | $76,032 |
| LAUREN TAYLOR 420 W ELDORADO, DECATUR, IL 62522 | ASST DIRECTO Highest-paid employee | 40 | $58,200 |
| PETER MUELLER 420 W ELDORADO, DECATUR, IL 62522 | PRESIDENT | 0.25 | $0 |
| ANNE MUELLER 420 W ELDORADO, DECATUR, IL 62522 | VICE PRESIDE | 0.25 | $0 |
| MARK STALEY 420 W ELDORADO, DECATUR, IL 62522 | TREASURER | 0.25 | $0 |
| ANDREW JORDAN 420 W ELDORADO, DECATUR, IL 62522 | SECRETARY | 0.25 | $0 |
| FRANK MUELLER 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR | 0.25 | $0 |
990-PF for the year ended December 31, 2024: 7 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KATHERINE UNRUH 420 W ELDORADO, DECATUR, IL 62522 | MUSEUM DIREC Highest-paid employee | 40 | $75,648 |
| LAUREN TAYLOR 420 W ELDORADO, DECATUR, IL 62522 | ASST MUSEUM Highest-paid employee | 40 | $56,184 |
| PETER MUELLER 420 W ELDORADO, DECATUR, IL 62522 | PRESIDENT | 0.25 | $0 |
| ANNE MUELLER 420 W ELDORADO, DECATUR, IL 62522 | VICE PRESIDE | 0.25 | $0 |
| MARK STALEY 420 W ELDORADO, DECATUR, IL 62522 | TREASURER | 0.25 | $0 |
| ANDREW JORDAN 420 W ELDORADO, DECATUR, IL 62522 | SECRETARY | 0.25 | $0 |
| FRANK MUELLER 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR | 0.25 | $0 |
990-PF for the year ended December 31, 2023: 8 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KATHERINE UNRUH 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR Highest-paid employee | 0 | $72,720 |
| LAUREN TAYLOR 420 W ELDORADO, DECATUR, IL 62522 | ASST DIRECTO Highest-paid employee | 0 | $54,024 |
| JOHN SCOT MUELLER 420 W ELDORADO, DECATUR, IL 62522 | PRESIDENT | 0 | $0 |
| MARK STALEY 420 W ELDORADO, DECATUR, IL 62522 | TREASURER | 0 | $0 |
| ANDREW JORDAN 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR | 0 | $0 |
| FRANK MUELLER 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR | 0 | $0 |
| PETER MUELLER 420 W ELDORADO, DECATUR, IL 62522 | DIRECTOR | 0 | $0 |
| SARA MULLIGAN 420 W ELDORADO, DECATUR, IL 62522 | SECRETARY | 0 | $0 |
Address and contacts
- Address (IRS master file)
- 420 W ELDORADO ST, DECATUR, IL 62522-2189
- Signed the 990-PF
- PETER MUELLER, PRESIDENT
- Phone
- (217) 423-6161
- Website
- MUELLERMUSEUM.ORG
- Return prepared by
- MCGUIRE YUHAS HUFFMAN & BUCKLEY PC
What it must file and when
IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-PF on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-PF on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-PF on file |
IRS record
- EIN
- 37-1328048
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Private operating foundation
- Donations deductible (Pub 78)
- Private operating foundation, 50% limit
- Exempt since
- 2023
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Arts, culture and humanities (A50)
- Assets (IRS master file)
- $4,692,461
- Income (IRS master file)
- $1,918,608
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $392,850 | $324,484 | $4,692,461 | IRS |
| 990-PF | December 2024 | $302,813 | $313,794 | $4,618,259 | IRS |
| 990-PF | December 2023 | $160,515 | $316,677 | $4,629,095 | XML |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | IRS |
| 990-PF | December 2020 | – | – | – | IRS |
| 990-PF | December 2018 | – | – | – | IRS |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 37-1328048).
Questions about HIERONYMUS MUELLER FAMILY FOUNDATION
- What is the EIN of HIERONYMUS MUELLER FAMILY FOUNDATION?
- The employer identification number (EIN) of HIERONYMUS MUELLER FAMILY FOUNDATION is 37-1328048.
- Is HIERONYMUS MUELLER FAMILY FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2023.
- Are donations to HIERONYMUS MUELLER FAMILY FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private operating foundation, 50% limit).
- Which annual return does HIERONYMUS MUELLER FAMILY FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of HIERONYMUS MUELLER FAMILY FOUNDATION due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did HIERONYMUS MUELLER FAMILY FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended December 2025.
- Who are the officers and directors of HIERONYMUS MUELLER FAMILY FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 7 people; 2 received compensation from the organization, the highest $76,032 (KATHERINE UNRUH, DIRECTOR).
- How much revenue does HIERONYMUS MUELLER FAMILY FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $392,850, expenses of $324,484 and total assets of $4,692,461 at year end.
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