Rhizomium Foundation
Invitation OnlyBarneveld, Wisconsin · EIN 99-2965178 · Private foundation
Half of its grants to organizations were between $10,000 and $25,000.
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
40% of grants went outside Wisconsin.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Savanna Institute | Madison, WI | Advocacy | $125,000 |
| Clearspring School | Eureka Spirngs, AR | Advocacy | $25,000 |
| Rooted Wi Inc | Madison, WI | Advocacy | $25,000 |
| Florida School of Woodwork | Tampa, FL | Advocacy | $10,000 |
| Mycological Society | Windsor, WI | Advocacy | $10,000 |
The return also lists 5 grants to individuals ($60,000). We do not publish the names of individual recipients.
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $255,000 | 10 |
| 2024 | Unknown | 0 |
Sources
- IRS Form 990-PF, tax year 2025, filed Aug 18, 2026 - IRS e-file batch, object ID 202612309349100116
- IRS Tax Exempt Organization Search for EIN 99-2965178
- Profile updated Nov 6, 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.