Leon V and Marilyn L Rosenberg Family Foundation

Private foundation · Grantmaker Newton Centre, MA EIN: 38-7028578

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

Beth Israel Deaconess Medical Center: $1.0MBeth Israel Deaconess MedicalCenter$1.0M

The largest 2024 recipient was Beth Israel Deaconess Medical Center ($1.0M).

Grant Size Distribution

5 grants across all recorded years

<$50K$50–100K$100–250K$250–500K$500K–1M5$1–5M$5M+

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

1state

Share of the 2024 grant dollars on its one itemized grant.

Cities

Boston

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

$0$500K$1M$1.5M$2M1 grant2020 1 grant2021 1 grant2022 1 grant2023 1 grant2024

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

RecipientPurposeAmount
Beth Israel Deaconess Medical Center Boston, MASupport Cancer Research & Cancer Treatment Facilities$1,000,000
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Financial History

Multi-year comparison from IRS filings

Figures from IRS filings, by filing year
Filing yearTotal AssetsRevenueExpensesGrants paidGrantsQualifying DistributionsNet Investment IncomeDistributable Amount
2024$16,842,669$5,270,448$1,031,218$1,000,0001$1,026,267$393,621$776,678
2023$12,603,439$7,027,309$1,888,482$1,887,8901$1,888,390$176,848$600,070
2022$7,464,612$1,299,441$1,888,430$1,887,8901$1,887,890$80,770$280,174
2021$8,053,601$2,263,464$1,888,430$1,887,8901$1,887,890$68,262$303,377
2020$7,678,567$2,301,910$1,895,454$1,887,8901—$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

  1. Updated Form 990-PF for fiscal year 2020 (received by the IRS November 10, 2021)
  2. Updated Form 990-PF for fiscal year 2021 (received by the IRS November 15, 2022)
  3. Updated Form 990-PF for fiscal year 2022 (received by the IRS May 8, 2023)
  4. Updated Form 990-PF for fiscal year 2023 (received by the IRS July 29, 2024)
  5. Updated Form 990-PF for fiscal year 2024 (received by the IRS November 17, 2025)
  6. IRS filings on file for fiscal years 2020–2024

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The filing figures on this page are open data under CC BY 4.0. About GrantGraph Open

Figures come from Leon V and Marilyn L Rosenberg Family Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.

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