William Rosenberg
William Rosenberg is a private foundation based in Boston, Massachusetts. Its 2024 filing reports 33 grants totaling $467,031 to charitable organizations, including recipients in Massachusetts, Florida, and Colorado.
William Rosenberg at a glance
In short: William Rosenberg gave $467K across 33 grants in 2024 (avg $14K), top state Massachusetts. 48% of 2024 grantees were new. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $467,031
- -87.1% vs 2023
- Grants made (2024)
- 33
- +0.0% vs 2023
- Average grant
- $14,152
- -87.1% vs 2023
- Median grant
- $10,000
- Total assets
- $9,550,311
- +12.4% vs 2023
- New grantees (estimate)
- 48% first-time grantees (16 of 33, 2024)
- Primary geography
- Massachusetts (44% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to William Rosenberg
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation does not accept unsolicited requests for funds and states that it makes contributions only to preselected charitable organizations.
- Contact
Mailing address: 131 Seaport Blvd 1803, Boston, MA 02210
Phone: (617) 641-0040
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who William Rosenberg funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2024
The largest 2024 recipient was McLean Hospital ($96K). Together the top 10 received $322K.
Grant Size Distribution
214 grants across all recorded years
The most common grant size was under $50K: 197 grants of 214 (92%).
Geographic Focus
Where this funder awards grants
The 2024 grant dollars were distributed primarily to recipients in Massachusetts (44%), Florida (21%), and Colorado (17%). Smaller shares went to recipients in Ohio (5%) and New Jersey (3%).
Grant Distribution by State
Share of 2024 grant dollars across all 33 itemized grants.
States
Cities
Is William Rosenberg open to new grantees?
48%
first-time grantees, 2024
In 2024, 16 of 33 grantees (48%) were first-time recipients. First grants averaged $11K; repeat grants $17K. How we count
Medians: $10K first-time, $10K repeat.
- 39% of 2024 grantees were also funded in 2023. Method
- Giving fell 42% from 2021 to 2024. Method
- In 2024 it paid out 133% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2020–2024). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $467K (2024) to $3.6M (2023). In 2024 it made 33 grants totaling $467K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| McLean Hospital Belmont, MA | To Further Entity's Exempt Purpose | $96,000 |
| Combined Jewish Philanthrop Boston, MA | To Further Entity's Exempt Purpose | $58,778 |
| Jazz at Aspen-Snowmass Aspen, CO | To Further Entity's Exempt Purpose | $40,000 |
| Aspen Community Foundation Basalt, CO | To Further Entity's Exempt Purpose | $25,000 |
| Fidelity Investments Charitable Gift Fund Cincinnati, OH | To Further Entity's Exempt Purpose | $23,775 |
| Charity for Change Naples, FL | To Further Entity's Exempt Purpose | $18,778 |
| Bascom Palmer Eye Institute Miami, FL | To Further Entity's Exempt Purpose | $15,000 |
| Lighthouse of Collier Inc Naples, FL | To Further Entity's Exempt Purpose | $15,000 |
| Jupiter Medical Center Inc Jupiter, FL | To Further Entity's Exempt Purpose | $15,000 |
| American Friends of United Jewish Appeal of Greater Toronto Inc Whippany, NJ | To Further Entity's Exempt Purpose | $15,000 |
Ready to take the next step with William Rosenberg?
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 | $9,550,311 | $778,359 | $823,351 | $467,031 | 33 | $694,112 | $650,315 | $523,608 |
| 2023 | $8,495,324 | $29,851 | $4,156,761 | $3,618,188 | 33 | $3,958,765 | $95,494 | $592,510 |
| 2022 | $11,517,219 | $362,372 | $1,090,355 | $749,729 | 49 | $934,660 | $225,677 | $725,505 |
| 2021 | $11,596,281 | $1,152,122 | $1,094,879 | $812,000 | 51 | $943,162 | $1,037,443 | $789,239 |
| 2020 | $11,539,038 | $1,291,306 | $1,045,709 | $777,550 | 48 | — | $1,179,341 | $669,237 |
Under IRS private-foundation payout rules, William Rosenberg reported a distributable amount of $524K for 2024 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No foundation mission is stated in the available information. Its 2024 recipients include organizations working in music and arts education, community philanthropy, children’s education, services for people with visual impairments, healthcare, and Jewish identity and community programs. These are grantees’ stated activities, not stated foundation priorities. For example, Jazz Aspen-Snowmass says its mission is to present and preserve jazz through festivals, performances, and education programs; Lighthouse of Collier says it works to foster independence and quality of life for blind and visually impaired people and their caregivers.
Grantmaking
In 2024, the foundation made 33 grants totaling $467,031. Grants ranged from $50 to $96,000, with a median of $10,000. The largest awards included $96,000 to McLean Hospital, $58,778 to Combined Jewish Philanthropies, $40,000 to Jazz at Aspen-Snowmass, and $25,000 to Aspen Community Foundation. The filing lists each grant’s purpose as “to further entity’s exempt purpose.”
Leadership & Key People
Leadership team and compensation from IRS filings
The 2024 filing lists Ann M. Rosenberg as president/director. Directors are Barbara Rosenberg, Carol Silverstein, Carolyn A. Ryan, Donald N. Rosenberg, James Rosenberg, Jennifer Fox, Jill Gottlieb, John M. Rosenberg, and Lauren M. Neill. Donald N. Rosenberg and James Rosenberg are listed as co-treasurers/directors.
William Rosenberg is led by Ann M. Rosenberg, President & Director on every filing since 2020; 15 of 19 officers listed in 2024 are compensated.
Officers on the 2024 filing
Ann M. Rosenberg
President & Director
On filings since 2020
1 hr/week
$25K (2020) → $0 (2024)
Barbara Rosenberg
Director
On filings since 2020
1 hr/week
$3K (2020) → $3K (2024)
Carol Silverstein
Director
On filings since 2020
1 hr/week
$25K (2020) → $20K (2024)
Carolyn A. Ryan
Director
On filings since 2020
1 hr/week
$3K (2020) → $0 (2024)
Donald N. Rosenberg
Co-Treasurer & Director
On filings since 2020
1 hr/week
$25K (2020) → $20K (2024)
James Rosenberg
Co-Treasurer & Director
On filings since 2020
1 hr/week
$17K (2020) → $22K (2024)
Jennifer Fox
Director
On filings since 2020
1 hr/week
$3K (2020) → $8K (2024)
Jill Gottlieb
Director
On filings since 2020
1 hr/week
$3K (2020) → $8K (2024)
John M. Rosenberg
Director
On filings since 2020
1 hr/week
$3K (2020) → $3K (2024)
Lauren M. Neill
Director
On filings since 2020
1 hr/week
$3K (2020) → $8K (2024)
Michael Rosenberg
Director
On filings since 2020
1 hr/week
$17K (2020) → $22K (2024)
Robert M. Rosenberg
Director
On filings since 2020
1 hr/week
$25K (2020) → $20K (2024)
Tara-Lynn Boreham Rosenberg
Director
On filings since 2020
1 hr/week
$3K (2020) → $3K (2024)
Rebecca R. Rosenberg
Director
On filings since 2021
1 hr/week
$3K (2021) → $3K (2024)
Vanessa Rosenberg
Director
On filings since 2021
1 hr/week
$3K (2021) → $3K (2024)
Wyatt Ryan
Director
On filings since 2021
1 hr/week
$3K (2021) → $0 (2024)
Tyler Bednar
Director
On filings since 2022
1 hr/week
$3K (2022) → $3K (2024)
Waylon Ryan
Director
On filings since 2022
1 hr/week
$3K (2022) → $0 (2024)
Jeff Rosenberg
Director
On filings since 2023
1 hr/week
$3K (2023) → $3K (2024)
Former officers (1)
- Former: Michael Ryan (2020–2021) — Director
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.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $22K, to James Rosenberg (Co-Treasurer/Director). 15 officers or directors reported compensation on that filing.
Frequently asked questions about William Rosenberg
How much does William Rosenberg give each year?
William Rosenberg gave $467K across 33 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $3.6M across 33 grants.
What is William Rosenberg's typical grant size?
William Rosenberg's median grant in 2024 was $10,000, and its average grant was $14,152, across 33 grants on its 2024 IRS Form 990-PF. Organizations receiving their first grant from William Rosenberg that year got $11K on average.
Where does William Rosenberg give grants?
William Rosenberg's top state is Massachusetts, with 44% of the grant dollars itemized on its 2024 IRS Form 990-PF. The next largest states were Florida (21%) and Colorado (17%). The most frequent recipient cities were Boston, MA (4 grants), New York, NY (3 grants), Aspen, CO (2 grants) and Naples, FL (2 grants).
Who are William Rosenberg's largest grantees?
William Rosenberg's largest 2024 grantees include McLean Hospital ($96,000), Combined Jewish Philanthrop ($58,778) and Jazz at Aspen-Snowmass ($40,000), according to its 2024 IRS Form 990-PF. Together they received 42% of its itemized 2024 grant dollars.
How large is William Rosenberg?
William Rosenberg reported $9.6M in total assets on its 2024 IRS Form 990-PF. It paid out $694K in qualifying distributions that year, against a required minimum of $524K (roughly 5% of its investment assets).
What does William Rosenberg fund?
No foundation mission is stated in the available information. Its 2024 recipients include organizations working in music and arts education, community philanthropy, children’s education, services for people with visual impairments, healthcare, and Jewish identity and community programs. See mission & focus areas ↑
How do I apply for a grant from William Rosenberg?
The foundation does not accept unsolicited requests for funds and states that it makes contributions only to preselected charitable organizations. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is William Rosenberg's EIN?
William Rosenberg's EIN (Employer Identification Number) is 59-2675613. IRS Form 990 filing data is available on this page for 2020–2024.
Does William Rosenberg accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
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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Cite this profile
Grantable. (2026). William Rosenberg funder profile. GrantGraph. Retrieved October 11, 2026, from https://grantable.co/funders/william-rosenberg-morg_d92eca96fa244cb7bda769d545bb34ac
BibTeX
@misc{grantable_592675613_2026,
author = {{Grantable}},
title = {{William Rosenberg funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/william-rosenberg-morg_d92eca96fa244cb7bda769d545bb34ac},
note = {Accessed 2026-10-11. Data licensed CC BY 4.0}
}The figures on this page are open data under CC BY 4.0: reuse them with credit to Grantable and a link. Download the data.
Figures come from William Rosenberg'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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