The William & Phyllis Mack Family
The William & Phyllis Mack Family Foundation Inc is a private family foundation established in 1997 and based in Fort Lee, New Jersey. The foundation operates as a 501(c)(3) tax-exempt organization and utilizes investment income to support charitable causes across multiple sectors.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$5.9M
+3.8% YoY
Annual Giving
$3.2M
-42.7% YoY
Grant Count
53
-3.6% YoY
Avg Grant Size
$61K
-40.5% YoY
Under IRS private-foundation payout rules, The William & Phyllis Mack Family reported a distributable amount of $5K for 2024 — the minimum it must pay out in qualifying distributions.
Mission & Focus Areas
The foundation gives primarily to museums, as well as hospitals, education, and Jewish organizations. The foundation's grantmaking is supported by interest income, dividend income, net rental income, and gains on the sale of investments earned on its investment portfolio.
Grantmaking
The foundation makes grants for charitable purposes across its focus areas, with no specific application process information available in verified sources.
Grant Types
How to Apply
information available in verified sources.
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Geographic Focus
Where this funder awards grants
The foundation primarily funds organizations in New York, Florida, and the District of Columbia.
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
As of 2024:
- Total Assets: $5,878,187
- Total Revenues: $3,523,372
- Total Expenses: $3,306,352
- Number of Employees: 0
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $5,878,187 | $5,661,018 | $5,912,274 |
| Revenue | $3,523,372 | $5,490,738 | $4,698,087 |
| Expenses | $3,306,352 | $5,750,166 | $4,500,486 |
| Qualifying Distributions | $3,213,882 | $5,608,596 | $4,376,780 |
| Net Investment Income | $38,474 | $50,310 | $575,568 |
| Distributable Amount | $5,254 | $5,818 | $9,677 |
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 2024
Grant Size Distribution
217 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest include Guggenheim Museum ($820,000), Northwell Health Foundation ($788,000), Uja Federation of New York ($300,000).
No grants recorded for .
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| WILLIAM MACK | TRUSTEE | — | — |
| PHYLLIS MACK | TRUSTEE | — | — |
| RICHARD MACK | TRUSTEE | — | — |
| STEPHEN MACK | TRUSTEE | — | — |
Recent News & Activity
Recent developments and announcements
The Wharton School of the University of Pennsylvania received a gift from William L. and Phyllis Mack to establish the Mack Institute for Innovation Management. The Mack family has demonstrated a five-decade history of philanthropic giving that has transformed care across Manhattan and Long Island through support of health institutions.
Wharton School Announces Gift from William L. and Phyllis Mack to EstablishSubject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What does The William & Phyllis Mack Family fund?
The foundation gives primarily to museums, as well as hospitals, education, and Jewish organizations. The foundation's grantmaking is supported by interest income, dividend income, net rental income, and gains on the sale of investments earned on its investment portfolio.
How do I apply for a grant from The William & Phyllis Mack Family?
**Grant Activity & Scale:** • Made 46 grants in the most recent reporting year • Total giving: $3,213,882 • Typical award range: $100–$2,000,000 **Recent Notable Grants (2024):** • Northwell Health Foundation: $788,000 • UJA-Federation of New York: $300,000 **Grant Types:** The foundation makes grants for charitable purposes across its focus areas, with no specific application process information available in verified sources.
Where does The William & Phyllis Mack Family make grants?
The foundation primarily funds organizations in New York, Florida, and the District of Columbia.
What size grants does The William & Phyllis Mack Family award?
In 2024, The William & Phyllis Mack Family awarded 53 grants totaling $3.2M — an average of about $61K per grant, based on its IRS Form 990 filings.
How much is The William & Phyllis Mack Family required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, The William & Phyllis Mack Family reported a distributable amount of $5K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is The William & Phyllis Mack Family's EIN?
The William & Phyllis Mack Family's EIN (Employer Identification Number) is 22-3512719. IRS Form 990 filing data is available on this page for 2020–2024.
Explore Open Grants
Browse active grant opportunities in The William & Phyllis Mack Family's focus areas in our free grants database
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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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