Milton & Harriet Sioles Family
Milton & Harriet Sioles Family is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in PARADISE VALLEY, AZ. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $3.0M in total assets. In 2025, it awarded 4 grants totaling $146K. Net investment income was $45K.
Financial Overview
From 2025 IRS Form 990-PF · View filing
Total Assets
$3.0M
-4.1% YoY
Annual Giving
$146K
-42.2% YoY
Grant Count
4
-20.0% YoY
Avg Grant Size
$37K
-27.7% YoY
Under IRS private-foundation payout rules, Milton & Harriet Sioles Family reported a distributable amount of $141K for 2025 — the minimum it must pay out in qualifying distributions.
About Milton & Harriet Sioles Family
Based on IRS filings
Milton & Harriet Sioles Family is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in PARADISE VALLEY, AZ. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $3.0M in total assets. In 2025, it awarded 4 grants totaling $146K. Net investment income was $45K.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $3,020,650 | $3,148,208 | $2,909,468 |
| Revenue | $95,464 | $567,122 | $501,966 |
| Expenses | $223,022 | $328,382 | $302,700 |
| Qualifying Distributions | $146,000 | $252,500 | $200,000 |
| Net Investment Income | $45,150 | $491,240 | $399,266 |
| Distributable Amount | $140,932 | $143,791 | $146,194 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2025
Grant Size Distribution
18 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2025 grants, the largest include Mayo Clinic ($100,000), Stephen Siller Tunnel to Towers Foundation ($25,000), Most Holy Trinity Roman Catholic Parish Phoenix ($11,000).
| Recipient | Purpose | Amount |
|---|---|---|
| MAYO CLINIC SCOTTSDALE, AZ | MEDICAL | $100,000 |
| MOST HOLY TRINITY ROMAN CATHOLIC PARISH PHOENIX PHOENIX, AZ | RELIGIOUS | $11,000 |
| STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION STATEN ISLAND, NY | BUILD SMART HOMES FOR CATASTROPHICALLY INJURED SERVICE MEMBERS RETURNING HOME. | $25,000 |
| TUCSON TORAH DAY SCHOOL TUCSON, AZ | RELIGIOUS | $10,000 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2025 IRS filing
From 2025 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| ELYSE C SIOLES | DIRECTOR/SECRETARY | 0.5 | — |
| ROBERT M SIOLES | DIRECTOR/TREASURER | 0.5 | — |
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What is Milton & Harriet Sioles Family?
Milton & Harriet Sioles Family is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in PARADISE VALLEY, AZ. It holds $3.0M in total assets as of 2025.
How large is Milton & Harriet Sioles Family?
As of 2025, Milton & Harriet Sioles Family holds $3.0M in total assets with $95K in annual revenue. It awarded 4 grants totaling $146K in 2025.
Where does Milton & Harriet Sioles Family operate?
Milton & Harriet Sioles Family has awarded grants in Arizona, Illinois, New York.
What size grants does Milton & Harriet Sioles Family award?
In 2025, Milton & Harriet Sioles Family awarded 4 grants totaling $146K — an average of about $37K per grant, based on its IRS Form 990 filings.
How much is Milton & Harriet Sioles Family required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2025, Milton & Harriet Sioles Family reported a distributable amount of $141K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Milton & Harriet Sioles Family's EIN?
Milton & Harriet Sioles Family's EIN (Employer Identification Number) is 27-2546709. IRS Form 990 filing data is available on this page for 2020–2025.
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Data last updated April 2026. Sourced from IRS Form 990-PF filings.