Siron Foundation
Siron Foundation is a private foundation based in Whitewater, Wisconsin. Its 2025 filing reports 12 grants totaling $35,000 to charitable organizations.
Siron Foundation at a glance
In short: Siron Foundation gave $35K across 12 grants in 2025 (avg $3K), top state Wisconsin. 25% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $35,000
- +9.4% vs 2024
- Grants made (2025)
- 12
- +0.0% vs 2024
- Average grant
- $2,917
- +9.4% vs 2024
- Median grant
- $3,000
- Total assets
- $597,336
- -3.2% vs 2024
- New grantees (estimate)
- 25% first-time grantees (3 of 12, 2025; small sample)
- Primary geography
- Wisconsin (49% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Siron Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation stated on its 2024 IRS filing that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: 2215 N Lima Center Road, Whitewater, WI 53190
Phone: (608) 921-7956
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Siron Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Rock County Humane Society ($5K). Together the top 10 received $33K.
Grant Size Distribution
69 grants across all recorded years
The most common grant size was under $50K: 69 grants of 69 (100%).
Geographic Focus
Where this funder awards grants
In 2025, 49% of grant dollars went to recipients in Wisconsin, 14% to Illinois, 11% to Indiana, 9% to Montana, and 9% to Texas. The listed grants also included recipients in New York and Kansas.
Grant Distribution by State
Share of 2025 grant dollars across all 12 itemized grants.
Cities
Is Siron Foundation open to new grantees?
25%
first-time grantees, 2025
In 2025, 3 of 12 grantees (25%) were first-time recipients. With only 12 grantees, that is a small sample: one grantee more or less moves the share by about 8 points. First grants averaged $3K; repeat grants $3K. How we count
Medians: $3K first-time, $3K repeat.
- 75% of 2025 grantees were also funded in 2024. Method
- Giving held roughly steady from 2022 to 2025 (−8%). Method
- In 2025 it paid out 106% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2019–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $32K (2024) to $38K (2022). In 2025 it made 12 grants totaling $35K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Rock County Humane Society Janesville, WI | Assist pet adoptions | $5,000 |
| Make-A-Wish Foundation Chicago, IL | Create life-changing wishes for children with critical illnesses. | $5,000 |
| Rock Prairie Presbyterian Church Janesville, WI | Charitable | $4,000 |
| Sisters of St Benedict Ferdinand, IN | Support monastic women seeking God through the Benedictine tradition | $4,000 |
| St Labre Indian School Ashland, MT | Provide quality education and embraces Native American Cultures | $3,000 |
| Spirit Horse Equine Rescue Janesville, WI | Rescue, rehabilitation and rehoming of unwanted equines | $3,000 |
| Americaon Heart Association Dallas, TX | For heart health research and fighting heart disease and strokes to improve lives. | $3,000 |
| Salvation Army Janesville, WI | Assist indigent | $2,000 |
| Guiding Eyes For The Blind Yorktown Heights, NY | Provide guide dogs to people with vision loss. | $2,000 |
| Hoo's Woods Raptor Center Milton, WI | For education and rehabilitation of raptor species, and to inform the general public on the importance of wildlife and habitat. | $2,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $597,336 | $45,863 | $65,801 | $35,000 | 12 | $35,000 | $25,062 | $32,936 |
| 2024 | $617,274 | $23,359 | $41,966 | $32,000 | 12 | $32,000 | $9,974 | $32,263 |
| 2023 | $640,381 | $-7,736 | $53,670 | $35,000 | 14 | $35,000 | $2,341 | $31,750 |
| 2022 | $701,787 | $51,164 | $72,221 | $38,000 | 17 | $38,000 | $34,653 | $36,330 |
| 2021 | $722,844 | $32,227 | $55,925 | $35,000 | 14 | — | $21,595 | $38,183 |
| 2019 | $779,012 | $47,647 | $58,298 | $38,000 | 12 | — | $38,382 | $38,623 |
Under IRS private-foundation payout rules, Siron Foundation reported a distributable amount of $33K for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No mission statement is provided. The 2025 grants show support for organizations with varied purposes. For example, Guiding Eyes for the Blind says its mission is to provide guide dogs to people with vision loss and connect individuals with dogs for greater independence. The Janesville Performing Arts Center says it delivers artistic experiences and aims to be a creative catalyst for its community.
Grantmaking
In 2025, the foundation awarded 12 grants totaling $35,000. Grants ranged from $1,000 to $5,000, with a median of $3,000.
Among the largest grants were $5,000 to Rock County Humane Society to assist pet adoptions and $5,000 to Make-A-Wish Foundation for wishes for children with critical illnesses. The foundation also awarded $4,000 to Rock Prairie Presbyterian Church and $4,000 to Sisters of St Benedict. Other grants included $3,000 to St Labre Indian School, Spirit Horse Equine Rescue, and the Americaon Heart Association; $2,000 to Salvation Army, Guiding Eyes for the Blind, and Hoo’s Woods Raptor Center; and $1,000 each to Janesville Performing Arts Center and Eisenhower Foundation.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Donald Sartell and Jeffrey Sartell as trustees.
Siron Foundation's 2025 filing lists 2 officers; 1 of 2 officers listed in 2025 is compensated.
Officers on the 2025 filing
Donald Sartell
Trustee
On filings since 2019
2 hrs/week
$10K (2019) → $10K (2025)
Jeffrey Sartell
Trustee
New on the 2025 filing
2 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $10K, to Donald Sartell (Trustee).
Frequently asked questions about Siron Foundation
How much does Siron Foundation give each year?
Siron Foundation gave $35K across 12 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $32K across 12 grants.
What is Siron Foundation's typical grant size?
Siron Foundation's median grant in 2025 was $3,000, and its average grant was $2,917, across 12 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Siron Foundation that year got $3K on average.
Where does Siron Foundation give grants?
Siron Foundation's top state is Wisconsin, with 49% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were Illinois (14%) and Indiana (11%). The most frequent recipient cities were Janesville, WI (5 grants).
Does Siron Foundation give general operating support?
Occasionally: 8% of Siron Foundation's 2025 grants with a stated purpose (1 of 12) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Siron Foundation's largest grantees?
Siron Foundation's largest 2025 grantees include Rock County Humane Society ($5,000), Make-A-Wish Foundation ($5,000) and Rock Prairie Presbyterian Church ($4,000), according to its 2025 IRS Form 990-PF. Together they received 40% of its itemized 2025 grant dollars.
How large is Siron Foundation?
Siron Foundation reported $597K in total assets on its 2025 IRS Form 990-PF. It paid out $35K in qualifying distributions that year, against a required minimum of $33K (roughly 5% of its investment assets).
What does Siron Foundation fund?
No mission statement is provided. The 2025 grants show support for organizations with varied purposes. For example, Guiding Eyes for the Blind says its mission is to provide guide dogs to people with vision loss and connect individuals with dogs for greater independence. See mission & focus areas ↑
How do I apply for a grant from Siron Foundation?
The foundation stated on its 2024 IRS filing that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Siron Foundation's EIN?
Siron Foundation's EIN (Employer Identification Number) is 39-6508464. IRS Form 990 filing data is available on this page for 2019–2025.
Does Siron Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS March 31, 2020)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS November 12, 2021)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS January 16, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 15, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 15, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 14, 2026)
- IRS filings on file for fiscal years 2019–2024
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The filing figures on this page are open data under CC BY 4.0. About GrantGraph Open
Figures come from Siron Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
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