Milton & Harriet Sioles Family
Milton & Harriet Sioles Family is a private foundation, 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.
Milton & Harriet Sioles Family at a glance
In short: Milton & Harriet Sioles Family gave $146K across 4 grants in 2025 (avg $37K), mostly in Arizona. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $146,000
- -42.2% vs 2024
- Grants made (2025)
- 4
- -20.0% vs 2024
- Average grant
- $36,500
- -27.7% vs 2024
- Median grant
- $18,000
- Total assets
- $3,020,650
- -4.1% vs 2024
- Primary geography
- Arizona (83% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Milton & Harriet Sioles Family funds
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2025
The largest 2025 recipient was Mayo Clinic ($100K). Together the top 4 received $146K.
Grant Size Distribution
18 grants across all recorded years
The most common grant size was under $50K: 9 grants of 18 (50%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 4 itemized grants.
Cities
How Milton & Harriet Sioles Family gives
- Giving held roughly steady from 2022 to 2025 (−19%). Method
- In 2025 it paid out 104% of its IRS minimum distribution (the 5% rule). Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2025, annual grant giving ranged from $146K (2025) to $253K (2024). In 2025 it made 4 grants totaling $146K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Mayo Clinic Scottsdale, AZ | Medical | $100,000 |
| Stephen Siller Tunnel to Towers Foundation Staten Island, NY | Build smart homes for catastrophically injured service members returning home. | $25,000 |
| Most Holy Trinity Roman Catholic Parish Phoenix Phoenix, AZ | Religious | $11,000 |
| Tucson Torah Day School Tucson, AZ | Religious | $10,000 |
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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 | $3,020,650 | $95,464 | $223,022 | $146,000 | 4 | $146,000 | $45,150 | $140,932 |
| 2024 | $3,148,208 | $567,122 | $328,382 | $252,500 | 5 | $252,500 | $491,240 | $143,791 |
| 2023 | $2,909,468 | $501,966 | $302,700 | $200,000 | 2 | $200,000 | $399,266 | $146,194 |
| 2022 | $2,710,203 | $241,060 | $311,966 | $181,000 | 3 | $181,000 | $110,094 | $181,929 |
| 2021 | $2,781,109 | $218,564 | $209,456 | $175,500 | 4 | — | $184,286 | $175,937 |
| 2020 | $2,772,001 | $18,802 | $216,873 | $172,500 | 7 | — | $21,019 | $171,491 |
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.
Leadership & Key People
Officers and directors from IRS filings
Milton & Harriet Sioles Family's 2025 filing lists 2 officers; none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Elyse C. Sioles
Director & Secretary
On filings since 2020
0.5 hrs/week
No compensation reported
Robert M. Sioles
Director & Treasurer
On filings since 2020
0.5 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2020–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about Milton & Harriet Sioles Family
How much does Milton & Harriet Sioles Family give each year?
Milton & Harriet Sioles Family gave $146K across 4 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $253K across 5 grants.
What is Milton & Harriet Sioles Family's typical grant size?
Milton & Harriet Sioles Family's median grant in 2025 was $18,000, and its average grant was $36,500, across 4 grants on its 2025 IRS Form 990-PF.
Where does Milton & Harriet Sioles Family give grants?
Milton & Harriet Sioles Family gives mostly in Arizona: 83% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest state was New York (17%).
Does Milton & Harriet Sioles Family give general operating support?
Not in 2025: none of the 4 grants with a stated purpose on Milton & Harriet Sioles Family's 2025 IRS Form 990-PF were described as general or operating support.
How large is Milton & Harriet Sioles Family?
Milton & Harriet Sioles Family reported $3.0M in total assets on its 2025 IRS Form 990-PF. It paid out $146K in qualifying distributions that year, against a required minimum of $141K (roughly 5% of its investment assets).
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.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2025
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