Leon V and Marilyn L Rosenberg Family Foundation
Leon V and Marilyn L Rosenberg Family Foundation is a private foundation, based in Newton Centre, MA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $16.8M in total assets. In 2024, it awarded 1 grant totaling $1.0M. Net investment income was $394K.
Leon V and Marilyn L Rosenberg Family Foundation at a glance
In short: Leon V and Marilyn L Rosenberg Family Foundation gave $1.0M across 1 grant in 2024 (avg $1.0M), mostly in Massachusetts. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $1,000,000
- -47.0% vs 2023
- Grants made (2024)
- 1
- +0.0% vs 2023
- Average grant
- $1,000,000
- -47.0% vs 2023
- Median grant
- $1,000,000
- Total assets
- $16,842,669
- +33.6% vs 2023
- Primary geography
- Massachusetts (100% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026.
Who Leon V and Marilyn L Rosenberg Family Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2024
The largest 2024 recipient was Beth Israel Deaconess Medical Center ($1.0M).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $1–5M range: 5 grants of 5 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2024 grant dollars on its one itemized grant.
States
Cities
How Leon V and Marilyn L Rosenberg Family Foundation gives
- Giving fell 47% from 2021 to 2024. Method
- In 2024 it paid out 132% 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 $1.0M (2024) to $1.9M (2023). In 2024 it made 1 grant totaling $1.0M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Beth Israel Deaconess Medical Center Boston, MA | Support Cancer Research & Cancer Treatment Facilities | $1,000,000 |
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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 | $16,842,669 | $5,270,448 | $1,031,218 | $1,000,000 | 1 | $1,026,267 | $393,621 | $776,678 |
| 2023 | $12,603,439 | $7,027,309 | $1,888,482 | $1,887,890 | 1 | $1,888,390 | $176,848 | $600,070 |
| 2022 | $7,464,612 | $1,299,441 | $1,888,430 | $1,887,890 | 1 | $1,887,890 | $80,770 | $280,174 |
| 2021 | $8,053,601 | $2,263,464 | $1,888,430 | $1,887,890 | 1 | $1,887,890 | $68,262 | $303,377 |
| 2020 | $7,678,567 | $2,301,910 | $1,895,454 | $1,887,890 | 1 | — | $106,708 | $271,829 |
Under IRS private-foundation payout rules, Leon V and Marilyn L Rosenberg Family Foundation reported a distributable amount of $777K for 2024 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Leon V and Marilyn L Rosenberg Family Foundation's 2024 filing lists 3 officers; none of the 3 officers listed in 2024 report compensation.
Officers on the 2024 filing
Diane Rosenberg
Trustee
On filings since 2020
0.5 hrs/week
No compensation reported
Richard Rosenberg
Trustee
On filings since 2020
0.5 hrs/week
No compensation reported
Susan Rosenberg
Trustee
On filings since 2020
0.5 hrs/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 Leon V and Marilyn L Rosenberg Family Foundation
How much does Leon V and Marilyn L Rosenberg Family Foundation give each year?
Leon V and Marilyn L Rosenberg Family Foundation gave $1.0M across 1 grant in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $1.9M across 1 grant.
How large is Leon V and Marilyn L Rosenberg Family Foundation?
Leon V and Marilyn L Rosenberg Family Foundation reported $16.8M in total assets on its 2024 IRS Form 990-PF. It paid out $1.0M in qualifying distributions that year, against a required minimum of $777K (roughly 5% of its investment assets).
Where does Leon V and Marilyn L Rosenberg Family Foundation operate?
Leon V and Marilyn L Rosenberg Family Foundation has awarded grants in Massachusetts.
What is Leon V and Marilyn L Rosenberg Family Foundation's EIN?
Leon V and Marilyn L Rosenberg Family Foundation's EIN (Employer Identification Number) is 38-7028578. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated October 2026. Sourced from IRS Form 990-PF filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS November 10, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS November 15, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 8, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS July 29, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS November 17, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Leon V and Marilyn L Rosenberg Family Foundation funds
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