Sonnentag Foundation Ltd
Historical FunderMarathon, Wisconsin · EIN 39-1597420 · Private foundation · Website
Grants paid (2025)$6.4M
Organizations funded1
Typical grant$6,371,389
Total assets$45.1M
Half of its grants to organizations were between $6,371,389 and $6,371,389.
From the return
How to apply
The foundation filed the following application information (Form 990-PF Part XV, tax year 2025):
| Contact | CAROLYN SONNENTAG |
|---|---|
| Address | PO BOX 435, ASTATULA FL 34705 |
| Phone | 7158481365 |
| Form and materials | APPLICATIONS |
| Deadlines | NONE |
| Restrictions | EDUCATIONAL AWARDS/LOCAL SCHOLARSHIPS/RELIGIOUS NEEDS/NON-PROFIT NEEDS |
Copied as filed. Deadlines on a tax return describe the foundation's usual process; they are not confirmation of a current open cycle.
Where it gives
0% of grants went outside Wisconsin.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| All-See Attached | Marathon, WI | Charitable donations | $6,371,389 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $6,371,389 | 1 |
| 2024 | $9,431,634 | 1 |
| 2023 | $1,178,234 | 1 |
Sources
- IRS Form 990-PF, tax year 2025, filed Mar 16, 2026 - IRS e-file batch, object ID 202610759349100811
- IRS Tax Exempt Organization Search for EIN 39-1597420
- Profile updated Nov 7, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.