The Sidman Family Foundation is a private grantmaking foundation based in Boston, Massachusetts, established in 2007. The foundation is structured as a 501(c)(3) organization and operates as a family foundation with deep historical roots in the Boston area. The foundation makes contributions exclusively to preselected charitable organizations and does not accept unsolicited proposals.
Financial Overview
From 2025 IRS Form 990-PF · View filing
Total Assets
$7.0M
+53.4% YoY
Annual Giving
$1.4M
+41.9% YoY
Grant Count
47
+0.0% YoY
Avg Grant Size
$31K
+41.9% YoY
Under IRS private-foundation payout rules, The Sidman Family Foundation Inc reported a distributable amount of $387K for 2025 — the minimum it must pay out in qualifying distributions.
Mission & Focus Areas
The foundation's grantmaking interests span four primary areas:
Health and Human Services: Support for hospitals and medical institutions, including Beth Israel Deaconess Medical Center, Brigham and Women's Hospital, Massachusetts Eye and Ear Infirmary, and Children's Hospital Trust. Additional health-focused grantees include Team IMPACT, Brothers for Life, Planned Parenthood League of Massachusetts, and Fred Hutchinson Cancer Center.
Jewish Causes: Support for Jewish organizations and community initiatives.
Education and Youth Programs: Funding for educational institutions and youth-focused organizations.
Arts and Culture: Support for cultural and artistic projects.
Grantmaking
The foundation has supported 71 unique organizations. Grantmaking reaches organizations across 11 states, with the strongest concentration in Massachusetts, New York, and Florida, which account for 91% of all grants.
Grant Range
$10,000
Average Grant
$28,000 to $31,000
How to Apply
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Geographic Focus
Where this funder awards grants
The foundation primarily funds organizations in:
- Massachusetts (primary focus)
- New York
- Florida
Grantmaking extends to organizations across 11 states total.
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
Current Financial Position (2025):
- Total Assets: $7,035,526
- Annual Giving: $1,434,080
- Revenue: $4,001,573
- Expenses: $1,494,900
- Net Investment Income: $3,950,198
Financial History:
- 2024: Total Assets $4,587,253; Annual Giving $1,010,604
- 2023: Total Assets $5,104,054; Annual Giving $1,805,207
- 2010: Total Assets $9.1 million (showing decline over the long term to current $7 million)
The foundation is tax-deductible for donors and maintains zero liabilities.
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $7,035,526 | $4,587,253 | $5,104,054 |
| Revenue | $4,001,573 | $-235,266 | $-341,514 |
| Expenses | $1,494,900 | $1,099,594 | $1,881,608 |
| Qualifying Distributions | $1,443,524 | $1,010,604 | $1,805,207 |
| Net Investment Income | $3,950,198 | $57,250 | $44,426 |
| Distributable Amount | $387,081 | $343,274 | $410,519 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
Grant Size Distribution
230 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2025 grants, the largest include Duke University ($347,000), Combined Jewish Philanthropies ($250,000), Belmont Hill School ($100,000).
| Recipient | Purpose | Amount |
|---|---|---|
| ADL BOSTON, MA | CASH DONATION | $25,000 |
| BELMONT HILL SCHOOL BELMONT, MA | CASH DONATION | $100,000 |
| BETH ISRAEL SYNOGOGUE OMAHA, NE | BOOK OF REMEMBRANCE | $1,000 |
| BOSTON COMMUNITY PEDIATRICS MANSFIELD, MA | VOICES FROM THE FRONT LINES EVENT SPONSORSHIP | $25,000 |
| BROTHERS FOR LIFE SEATTLE, WA | CASH DONATION | $25,000 |
| CHABAD OF ANN ARBOR ANN ARBOR, MI | CASH DONATION | $2,500 |
| COMBINED JEWISH PHILANTHROPIES BOSTON, MA | CASH DONATION | $70,000 |
| COMBINED JEWISH PHILANTHROPIES BOSTON, MA | CASH DONATION | $250,000 |
| COMBINED JEWISH PHILANTHROPIES BOSTON, MA | CASH DONATION | $500 |
| COMBINED JEWISH PHILANTHROPIES BOSTON, MA | CASH DONATION | $5,400 |
Leadership & Key People
Leadership team and compensation from IRS filings
- Paula Sidman: President of the foundation
- Hope Sidman: Daughter of Paula; CEO of H2O Applied Technologies
- Matthew Sidman: Son of Paula; founder of hedge fund firm Three Bays Capital
- Jill McGaffigan: Principal officer (listed in recent filings)
Family Background: The foundation is steered by the Sidman family, which has strong ties to Boston spanning generations. Paula Sidman's father was the late Norman B. Leventhal, a real estate developer who significantly shaped the Boston skyline. Paula's husband, the late Edwin Sidman, joined Leventhal's company.
Compensation Overview
From 2025 IRS filing
From 2025 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| PAULA M SIDMAN | PRES/DIR | 5 | — |
| HOPE SIDMAN | TREAS/DIR | 5 | — |
| MATHEW K SIDMAN | ASST TREAS/C | 5 | — |
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What does The Sidman Family Foundation Inc fund?
The foundation's grantmaking interests span four primary areas: • **Health and Human Services**: Support for hospitals and medical institutions, including Beth Israel Deaconess Medical Center, Brigham and Women's Hospital, Massachusetts Eye and Ear Infirmary, and Children's Hospital Trust. Additional health-focused grantees include Team IMPACT, Brothers for Life, Planned Parenthood League of Massachusetts, and Fred Hutchinson Cancer Center. • **Jewish Causes**: Support for Jewish organizations …
How do I apply for a grant from The Sidman Family Foundation Inc?
**Grant Activity:** • Total grants awarded: 237 grants totaling $6.5 million across available records • Median grant size: $10,000 • Average grant size: $28,000 to $31,000 • Grant range: $100 to $300,000 **Recent Grantmaking Trends:** • 2025: $1.4 million in annual giving across 47 grants • 2024: $1.0 million in annual giving • 2023: $3.6 million distributed across 128 grants (highest activity year) • 2022: $1.9 million in annual giving The foundation has supported 71 unique organizations. Gran…
Where does The Sidman Family Foundation Inc make grants?
The foundation primarily funds organizations in: • Massachusetts (primary focus) • New York • Florida Grantmaking extends to organizations across 11 states total.
What size grants does The Sidman Family Foundation Inc award?
In 2025, The Sidman Family Foundation Inc awarded 47 grants totaling $1.4M — an average of about $31K per grant, based on its IRS Form 990 filings.
How much is The Sidman Family Foundation Inc required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2025, The Sidman Family Foundation Inc reported a distributable amount of $387K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is The Sidman Family Foundation Inc's EIN?
The Sidman Family Foundation Inc's EIN (Employer Identification Number) is 20-3867727. IRS Form 990 filing data is available on this page for 2021–2025.
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Data last updated June 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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