Nonprofit · EIN 36-4376705
OBERWEILER FOUNDATION
Tax-exempt · BARRINGTON, IL 60010
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $3,104,322 | $1,402,893 | $1,701,429 | $13,442,961 | $0 | $13,442,961 |
| December 31, 2024 | 990-PF | $1,364,403 | $1,315,714 | $48,689 | $11,742,032 | $500 | $11,741,532 |
| December 31, 2023 | 990-PF | $423,025 | $1,053,938 | -$630,913 | $11,694,577 | $500 | $11,694,077 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Dividends
- $440,524
- Interest
- $417
- Net gain from sales of assets
- $2,663,381
Expenses
- Grants and similar amounts paid
- $871,100
- Compensation of officers, directors and key employees
- $186,315
- Disbursements for charitable purposes
- $1,054,623
- Excise tax on investment income
- $38,851
Balance sheet and other
- Total assets, start of year
- $11,742,032
- Total assets, end of year
- $13,442,961
- Total liabilities, end of year
- $0
- Net assets, end of year
- $13,442,961
- Fair market value of assets
- $21,662,352
- Qualifying distributions
- $1,054,623
- Net investment income
- $3,104,322
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 | Other / benefits |
|---|---|---|---|---|
| MARY ROWE 200 ELA STREET STE 204, BARRINGTON, IL 60010 | VP/EXECUTIVE DIRECTOR | 40 | $185,915 | $5,577 |
| MARTHA LINN 140 W HILLSIDE, BARRINGTON, IL 60010 | DIRECTOR | 0.1 | $200 | $0 |
| SUE SINDEWALD 908 WEST POINT DRIVE, SCHAUMBURG, IL 60193 | DIRECTOR | 0.1 | $200 | $0 |
| SIEGFRIED WEILER 6840 CRYSTAL SPRINGS ROAD, BULLVALLEY, IL 60098 | PRESIDENT | 0.2 | $0 | $0 |
| ANNA WEILER 6840 CRYSTAL SPRINGS ROAD, BULLVALLEY, IL 60098 | TREASURER | 0.1 | $0 | $0 |
| RONALD OHLSEN 1013 FERCHLAND PLACE 410, MORONA, WI 53714 | DIRECTOR | 0.1 | $0 | $0 |
| KEVIN SCHEIWILLER 2130 HASSELL ROAD APT 204, HOFFMAN ESTATES, IL 60169 | DIRECTOR | 0.1 | $0 | $0 |
990-PF for the year ended December 31, 2024: 7 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| MARY ROWE 200 ELA STREET STE 204, BARRINGTON, IL 60010 | VICE PRESIDENT/EXECUTIVE D | 40 | $180,500 | $5,415 |
| RONALD OHLSEN 1013 FERCHLAND PLACE 410, MORONA, WI 53714 | DIRECTOR | 0.1 | $200 | $0 |
| MARTHA LINN 140 W HILLSIDE, BARRINGTON, IL 60010 | DIRECTOR | 0.1 | $200 | $0 |
| KEVIN SCHEIWILLER 2130 HASSELL ROAD APT 204, HOFFMAN ESTATES, IL 60169 | DIRECTOR | 0.1 | $200 | $0 |
| SUE SINDEWALD 908 WEST POINT DRIVE, SCHAUMBURG, IL 60193 | DIRECTOR | 0.1 | $200 | $0 |
| SIEGFRIED WEILER 6840 CRYSTAL SPRINGS ROAD, BULLVALLEY, IL 60098 | PRESIDENT | 0.2 | $0 | $0 |
| ANNA WEILER 6840 CRYSTAL SPRINGS ROAD, BULLVALLEY, IL 60098 | TREASURER | 0.1 | $0 | $0 |
990-PF for the year ended December 31, 2023: 8 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| MARY ROWE 200 ELA STREET STE 204, BARRINGTON, IL 60010 | VICE PRESIDENT/EXECUTIVE D | 40 | $185,600 | $5,163 |
| KEVIN SCHEIWILLER 2130 HASSELL ROAD APT 204, HOFFMAN ESTATES, IL 60169 | DIRECTOR | 0.1 | $400 | $0 |
| RONALD OHLSEN 1013 FERCHLAND PLACE 410, MORONA, WI 53714 | DIRECTOR | 0.1 | $200 | $0 |
| MARTHA LINN 140 W HILLSIDE, BARRINGTON, IL 60010 | DIRECTOR | 0.1 | $200 | $0 |
| SUE SINDEWALD 908 WEST POINT DRIVE, SCHAUMBURG, IL 60193 | DIRECTOR | 0.1 | $200 | $0 |
| JAMES R BARTELL 330 E MAIN STREET STE 204, BARRINGTON, IL 60010 | SECRETARY | 0.1 | $0 | $0 |
| SIEGFRIED WEILER 6840 CRYSTAL SPRINGS ROAD, BULLVALLEY, IL 60098 | PRESIDENT | 0.2 | $0 | $0 |
| ANNA WEILER 6840 CRYSTAL SPRINGS ROAD, BULLVALLEY, IL 60098 | TREASURER | 0.1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 330 E MAIN STREET SUITE 204, BARRINGTON, IL 60010-3203
- In care of
- % SIEGFRIED WEILER
- Signed the 990-PF
- MARY ROWE, VP & EXECUTIVE DIRECTOR
- Phone
- (847) 277-7443
- Return prepared by
- RSM US LLP
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
- 36-4376705
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Private non-operating foundation
- Donations deductible (Pub 78)
- Private foundation, 30% limit
- Exempt since
- 2000
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T22)
- Assets (IRS master file)
- $13,442,961
- Income (IRS master file)
- $6,157,553
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $3,104,322 | $1,402,893 | $13,442,961 | XML |
| 990-PF | December 2024 | $1,364,403 | $1,315,714 | $11,742,032 | XML |
| 990-PF | December 2023 | $423,025 | $1,053,938 | $11,694,577 | XML |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | IRS |
| 990-PF | December 2020 | – | – | – | 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 36-4376705).
Questions about OBERWEILER FOUNDATION
- What is the EIN of OBERWEILER FOUNDATION?
- The employer identification number (EIN) of OBERWEILER FOUNDATION is 36-4376705.
- Is OBERWEILER FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2000.
- Are donations to OBERWEILER FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does OBERWEILER FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of OBERWEILER 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 OBERWEILER 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 OBERWEILER FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 7 people; 3 received compensation from the organization, the highest $185,915 (MARY ROWE, VP/EXECUTIVE DIRECTOR).
- How much revenue does OBERWEILER FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $3,104,322, expenses of $1,402,893 and total assets of $13,442,961 at year end.
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