The Linda and Mike Mussallem Foundation
The Linda and Mike Mussallem Foundation is a private foundation, based in Wilmington, DE. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $81.8M in total assets. In 2024, it awarded 2 grants totaling $21.2M. Net investment income was $10.4M.
The Linda and Mike Mussallem Foundation at a glance
In short: The Linda and Mike Mussallem Foundation gave $21.2M across 2 grants in 2024 (avg $10.6M), mostly in California. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $21,200,000
- +410.7% vs 2023
- Grants made (2024)
- 2
- -33.3% vs 2023
- Average grant
- $10,600,000
- +666.0% vs 2023
- Median grant
- $10,600,000
- Total assets
- $81,805,032
- -10.6% vs 2023
- Primary geography
- California (94% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated September 2026.
Who The Linda and Mike Mussallem Foundation funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2024
The largest 2024 recipient was Stanford University ($20.0M). Together the top 2 received $21.2M.
Grant Size Distribution
8 grants across all recorded years
The most common grant size was in the $1–5M range: 7 grants of 8 (88%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2024 grant dollars across all 2 itemized grants.
States
Cities
How The Linda and Mike Mussallem Foundation gives
- Giving grew 760% from 2021 to 2024. Method
- In 2024 it paid out 431% 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 2024, annual grant giving ranged from $1.9M (2020) to $21.2M (2024). In 2024 it made 2 grants totaling $21.2M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Stanford University Stanford, CA | Center for Biodesign | $20,000,000 |
| Massachusetts General Hospital Boston, MA | Mussallem Transformative Scholars in ALS Research Award Fund and Translations of Human Neuron Screen Hits from the Lab | $1,200,000 |
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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 |
|---|---|---|---|---|---|---|---|---|
| 2024 | $81,805,032 | $12,478,220 | $22,209,442 | $21,200,000 | 2 | $21,654,960 | $10,448,689 | $5,020,720 |
| 2023 | $91,536,254 | $9,466,585 | $4,695,718 | $4,151,218 | 3 | $4,168,962 | $5,802,859 | $4,765,701 |
| 2022 | $86,635,718 | $12,149,126 | $4,521,533 | $4,074,727 | 1 | $4,092,252 | $5,472,345 | $4,168,959 |
| 2021 | $79,008,125 | $21,470,113 | $3,023,482 | $2,465,000 | 1 | $2,478,150 | $14,396,253 | $4,093,135 |
| 2020 | $60,561,494 | $19,132,446 | $2,121,511 | $1,865,000 | 1 | — | $11,409,626 | $2,478,117 |
Under IRS private-foundation payout rules, The Linda and Mike Mussallem Foundation reported a distributable amount of $5.0M for 2024 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Linda and Mike Mussallem Foundation is led by Michael Mussallem, Director, President & Treasurer on every filing since 2020; none of the 2 officers listed in 2024 report compensation.
Officers on the 2024 filing
Michael Mussallem
Director, President & Treasurer
On filings since 2020
1 hr/week
No compensation reported
Linda Mussallem
Director, Secretary & Vice President
On filings since 2020
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2020–2024. "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 The Linda and Mike Mussallem Foundation
How much does The Linda and Mike Mussallem Foundation give each year?
The Linda and Mike Mussallem Foundation gave $21.2M across 2 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $4.2M across 3 grants.
How large is The Linda and Mike Mussallem Foundation?
The Linda and Mike Mussallem Foundation reported $81.8M in total assets on its 2024 IRS Form 990-PF. It paid out $21.7M in qualifying distributions that year, against a required minimum of $5.0M (roughly 5% of its investment assets).
Where does The Linda and Mike Mussallem Foundation operate?
The Linda and Mike Mussallem Foundation has awarded grants in California, Massachusetts.
What is The Linda and Mike Mussallem Foundation's EIN?
The Linda and Mike Mussallem Foundation's EIN (Employer Identification Number) is 81-4585573. IRS Form 990 filing data is available on this page for 2020–2024.
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 2020–2024
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