Nonprofit · EIN 45-3660252
THEWES FAMILY FOUNDATION
Tax-exempt · BIRMINGHAM, MI 48009
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $3,385,220 | $574,882 | $2,810,338 | $9,701,402 | $0 | $9,701,402 |
| December 31, 2024 | 990-PF | $288,563 | $503,701 | -$215,138 | $6,891,064 | $0 | $6,891,064 |
| December 31, 2023 | 990-PF | $2,260,228 | $406,670 | $1,853,558 | $7,106,202 | $0 | $7,106,202 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $3,010,199
- Dividends
- $266,433
- Interest
- $99
- Net gain from sales of assets
- $108,489
Expenses
- Grants and similar amounts paid
- $380,000
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $380,000
- Excise tax on investment income
- $2,504
Balance sheet and other
- Total assets, start of year
- $6,891,064
- Total assets, end of year
- $9,701,402
- Total liabilities, end of year
- $0
- Net assets, end of year
- $9,701,402
- Fair market value of assets
- $11,966,816
- Qualifying distributions
- $380,000
- Net investment income
- $375,021
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 |
|---|---|---|---|
| LEONARD J GAYESKI 355 S OLD WOODWARD SUITE 200, BIRMINGHAM, MI 48009 | VICE-PRESIDENT/TREASURER | 1 | $0 |
| MARY ANN TOLLETT 4700 CANDACRAIG ROAD, JOHNS CREEK, GA 30022 | PRESIDENT/DIRECTOR | 1 | $0 |
| KATHERINE BROWNE 1831 STONEY CROFT LANE, BLOOMFIELD HILLS, MI 48304 | DIRECTOR | 1 | $0 |
| MADELINE THEWES 7931 BRIDGE VALLEY, CLARKSTON, MI 48348 | DIRECTOR | 1 | $0 |
990-PF for the year ended December 31, 2024: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| LEONARD J GAYESKI 355 S OLD WOODWARD SUITE 200, BIRMINGHAM, MI 48009 | VICE-PRESIDENT/TREASURER | 1 | $0 |
| MARY ANN TOLLETT 4700 CANDACRAIG ROAD, JOHNS CREEK, GA 30022 | PRESIDENT/DIRECTOR | 1 | $0 |
| KATHERINE BROWNE 1831 STONEY CROFT LANE, BLOOMFIELD HILLS, MI 48304 | DIRECTOR | 1 | $0 |
| MADELINE THEWES 7931 BRIDGE VALLEY, CLARKSTON, MI 48348 | DIRECTOR | 1 | $0 |
990-PF for the year ended December 31, 2023: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| LEONARD J GAYESKI 355 S OLD WOODWARD SUITE 200, BIRMINGHAM, MI 48009 | VICE-PRESIDENT/TREASURER | 1 | $0 |
| MARY ANN TOLLETT 4700 CANDACRAIG ROAD, JOHNS CREEK, GA 30022 | PRESIDENT/DIRECTOR | 1 | $0 |
| KATHERINE BROWNE 1831 STONEY CROFT LANE, BLOOMFIELD HILLS, MI 48304 | DIRECTOR | 1 | $0 |
| MADELINE THEWES 7931 BRIDGE VALLEY, CLARKSTON, MI 48348 | DIRECTOR | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 355 S OLD WOODWARD AVE STE 200, BIRMINGHAM, MI 48009-6260
- In care of
- % GEORGE V CASSAR JR
- Signed the 990-PF
- LEONARD J GAYESKI, VICE PRESIDENT & TREASURER
- Phone
- (248) 258-8900
- Return prepared by
- FENNER MELSTROM & DOOLING PLC
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
- 45-3660252
- 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
- 2012
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T20)
- Assets (IRS master file)
- $9,701,402
- Income (IRS master file)
- $4,452,975
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $3,385,220 | $574,882 | $9,701,402 | IRS |
| 990-PF | December 2024 | $288,563 | $503,701 | $6,891,064 | IRS |
| 990-PF | December 2023 | $2,260,228 | $406,670 | $7,106,202 | 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 45-3660252).
Questions about THEWES FAMILY FOUNDATION
- What is the EIN of THEWES FAMILY FOUNDATION?
- The employer identification number (EIN) of THEWES FAMILY FOUNDATION is 45-3660252.
- Is THEWES FAMILY FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2012.
- Are donations to THEWES FAMILY FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does THEWES FAMILY FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of THEWES 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 THEWES 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 THEWES FAMILY FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
- How much revenue does THEWES FAMILY FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $3,385,220, expenses of $574,882 and total assets of $9,701,402 at year end.
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