Sonnentag Foundation LTD
Accepts applications
Sonnentag Foundation LTD is a private foundation in Marathon, Wisconsin. In tax year 2025 it gave $6.4 million in 1 grant; the typical grant was $6.4 million and the largest $6.4 million. It accepts applications; its filing gives the instructions below.
From its IRS Form 990-PF for tax year 2025.
- Grants paid, 2025$6.4 million
- Number of grants1
- Typical grant$6.4 million
- Largest grant$6.4 million
- Assets$45.1 million
- New grantees0%
Giving in 2025 was down from $9.4 million the year before.
0% of its 2025 grantees had not received a grant from it the year before, so most of its money goes to organizations it already funds.
Giving by year
| Tax year | Grants paid | Number of grants | Assets |
|---|---|---|---|
| 2023 | $1.2 million | 1 | $38.9 million |
| 2024 | $9.4 million | 1 | $44.1 million |
| 2025 | $6.4 million | 1 | $45.1 million |
How to apply
| Contact | Carolyn Sonnentag PO Box 435, Astatula, FL 34705 |
|---|---|
| Phone or email | (715) 848-1365 |
| What to submit | Applications |
| Restrictions | Educational awards/local scholarships/religious needs/non-profit needs |
Foundation website IRS filings on ProPublica
Where it gives
All of its grants went to recipients in Wisconsin.
| State | Grants | Amount |
|---|---|---|
| Wisconsin | 1 | $6.4 million |
Grants paid in 2025
| Recipient | Purpose | Amount |
|---|---|---|
| All-See Attached | Charitable donations | $6.4 million |
Officers and trustees
- John Sonnentag
- Carolyn Sonnentag
- Bill Sonnentag
Questions people ask
Does Sonnentag Foundation LTD accept grant applications?
Yes. Its latest IRS filing says it accepts applications.
How much does Sonnentag Foundation LTD give?
$6.4 million in tax year 2025, across 1 grant, with a typical grant of $6.4 million.
Who runs Sonnentag Foundation LTD?
Its 2025 filing lists John Sonnentag (President), Carolyn Sonnentag (Vice President Part Time) and Bill Sonnentag (Director Part Time).