The Sidman Family Foundation Inc
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.
Key facts about The Sidman Family Foundation Inc
- EIN
- 20-3867727
- Latest 990 filing
- Form 990-PF, 2025
- Annual giving (2025)
- $1,434,080
- Grants made (2025)
- 47
- Average grant
- $30,512
- Median grant
- $5,400
- New grantees (estimate)
- 23% first-time grantees (9 of 39, 2025)
- Total assets
- $7,035,526
- Primary geography
- Massachusetts (56% of itemized 2025 grant dollars)
- Accepts unsolicited proposals
- No
- How to apply
- The foundation does not maintain a website and keeps a low profile. Full details ↓
Data from IRS Form 990-PF, 2025; updated September 2026. New grantees are estimated by matching recipient names across years (methodology). Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who The Sidman Family Foundation Inc funds
By grant dollars, the top recipient states for The Sidman Family Foundation Inc's 47 itemized 2025 grants were Massachusetts (56%), North Carolina (24%) and New York (8%). The most frequent recipient cities were Boston, MA (17 grants), New York City, NY (3 grants), Newton, MA (2 grants) and Seattle, WA (2 grants). 4% of grants with a stated purpose were for general or operating support. Recurring purposes include "Cash Donation" (31 grants).
Is The Sidman Family Foundation Inc open to new grantees?
23%
first-time grantees, 2025
In 2025, 9 of 39 grantees (23%) were first-time recipients. First grants averaged $15K; repeat grants $43K. How we count
Medians: $3K first-time, $10K repeat.
- 62% of 2025 grantees were also funded in 2024. Method
- Giving fell 25% from 2022 to 2025. Method
- In 2025 it paid out 373% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized IRS Form 990-PF grant lists (2021–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Next steps with The Sidman Family Foundation Inc
- How to evaluate The Sidman Family Foundation Inc as a funder
Our grant prospecting guide: read the 990-PF, check fit, and decide whether to apply.
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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
Grant Range
$10,000
Average Grant
$28,000 to $31,000
How to Apply
**
Ready to take the next step with The Sidman Family Foundation Inc?
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
Share of all 47 itemized 2025 grant dollars.
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 |
Data update history
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2021–2025
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
256 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2025 grants, the largest recipients include Combined Jewish Philanthropies ($443,900 across 6 grants), Duke University ($347,000), Belmont Hill School ($100,000).
| Recipient | Purpose | Amount |
|---|---|---|
| DUKE UNIVERSITY Durham, NC | JEWISH LIFE AT DUKE | $347,000 |
| COMBINED JEWISH PHILANTHROPIES Boston, MA | CASH DONATION | $250,000 |
| BELMONT HILL SCHOOL Belmont, MA | CASH DONATION | $100,000 |
| COMBINED JEWISH PHILANTHROPIES Boston, MA | PYMT 2 OF 5 ANTISEMITISM | $100,000 |
| JEWISH COMMUNAL FUND New York City, NY | CASH DONATION | $100,000 |
| COMBINED JEWISH PHILANTHROPIES Boston, MA | CASH DONATION | $70,000 |
| TEMPLE EMANUEL Newton, MA | MORNING MINYAN | $50,000 |
| FRIENDS OF THE PUBLIC GARDEN Boston, MA | COMM AVE. LIGHTS | $40,000 |
| JEWISH FEDERATION OF PALM BEACH West Palm Beach, FL | PLS & HS | $37,000 |
| THE BOSTON FOUNDATION Boston, MA | CIVIC LEADERSHIP FUND | $33,000 |
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
No officer or director reported compensation in the available filings.
From 2025 IRS 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?
The foundation does not maintain a website and keeps a low profile. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
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.
Does The Sidman Family Foundation Inc accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
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Data last updated September 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.