Prospect Hill Foundation Inc
Prospect Hill Foundation Inc is a private foundation based in New York, NY. Established in New York in 1959 by William S. Beinecke and Elizabeth G. Beinecke, it supports grantmaking in nuclear disarmament and nonproliferation, youth, and director-initiated sponsored giving.
Prospect Hill Foundation Inc at a glance
In short: Prospect Hill Foundation Inc gave $2.6M across 346 grants in 2025 (avg $8K), top state New York. 22% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $2,612,820
- +1.1% vs 2024
- Grants made (2025)
- 346
- +17.3% vs 2024
- Average grant
- $7,552
- -13.8% vs 2024
- Median grant
- $1,000
- Total assets
- $78,420,645
- +2.9% vs 2024
- New grantees (estimate)
- 22% first-time grantees (48 of 221, 2025)
- Primary geography
- New York (43% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Prospect Hill Foundation Inc
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation does not accept unsolicited requests for funds. Its website says program grants are made on a rolling basis, generally according to program committee meeting schedules. Sponsored grantees are invited to submit proposals ahead of board meetings.
- Deadline
- Rolling
- Contact
Mailing address: 99 Park Avenue 2220, New York, NY 10016-1601
Phone: (212) 370-1165
Website: https://prospect-hill.org
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Prospect Hill Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Arms Control Association ($110K across 4 grants). Together the top 10 received $794K.
Grant Size Distribution
1,585 grants across all recorded years
The most common grant size was under $50K: 1,528 grants of 1,585 (96%).
Geographic Focus
Where this funder awards grants
The foundation says its grants primarily support activities in the United States, with particular local and regional focus on New York, Rhode Island, Cape Cod, and the Berkshires. Its website also identifies the Adirondacks and New York City among the areas of emphasis for sponsored grants, and describes a smaller presence in the San Francisco/Bay Area.
In 2025, recipient-state shares of grant dollars were New York 43%, Massachusetts 15%, District of Columbia 13%, California 9%, and Wisconsin 4%.
Grant Distribution by State
Share of 2025 grant dollars across all 346 itemized grants.
States
Cities
Is Prospect Hill Foundation Inc open to new grantees?
22%
first-time grantees, 2025
In 2025, 48 of 221 grantees (22%) were first-time recipients. First grants averaged $6K; repeat grants $13K. How we count
Medians: $1K first-time, $3K repeat.
- 59% of 2025 grantees were also funded in 2024. Method
- Giving held roughly steady from 2022 to 2025 (−20%). Method
- In 2025 it paid out 101% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2019–2025). 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 2019 to 2025, annual grant giving ranged from $2.4M (2021) to $3.3M (2022). In 2025 it made 346 grants totaling $2.6M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Arms Control Association Washington, DC | General Support | $75,000 |
| Center for Arms Control and Non-Proliferation Washington, DC | General Support | $75,000 |
| Outrider Foundation Madison, WI | Outrider's Journalism & Media Program | $75,000 |
| The Trustees of Reservations Boston, MA | Bartholomew's Cobble Grouping | $75,000 |
| Dana Hall School Wellesley, MA | Capital Campaign | $55,000 |
| Ballet Hispanico of New York New York, NY | Ballet Hispnico's Dance Innovacin Fund | $50,000 |
| Global Greengrants Fund Boulder, CO | Capital Grant/Organizational Strengthening | $50,000 |
| Prospect Park Alliance Brooklyn, NY | Lefferts House | $50,000 |
| The Keewaydin Foundation Salisbury, VT | The Sperry Fund Endowed Scholarship | $50,000 |
| Legacy Philanthropy Works Santa Barbara, CA | For Catch Together | $45,000 |
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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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | $78,420,645 | $6,036,814 | $4,640,480 | $2,612,820 | 346 | $3,758,195 | $5,127,191 | $3,711,340 |
| 2024 | $76,184,498 | $2,128,010 | $4,312,261 | $2,583,324 | 295 | $3,619,157 | $1,384,836 | $3,659,086 |
| 2023 | $74,142,105 | $2,504,507 | $4,918,224 | $3,122,048 | 346 | $4,064,903 | $1,426,331 | $3,581,447 |
| 2022 | $74,858,548 | $7,708,637 | $4,738,899 | $3,263,551 | 304 | $3,973,410 | $5,966,524 | $4,198,326 |
| 2021 | $88,998,817 | $4,442,188 | $4,063,588 | $2,437,086 | 294 | — | $2,461,792 | $3,775,646 |
| 2020 | $69,947,130 | $5,189,414 | $4,336,627 | $2,679,885 | 321 | — | $3,224,507 | $3,330,483 |
| 2019 | $69,575,091 | $3,161,919 | $4,347,087 | $2,546,331 | 287 | — | $2,099,323 | $3,337,559 |
Under IRS private-foundation payout rules, Prospect Hill Foundation Inc reported a distributable amount of $3.7M for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
The foundation’s mission is “to advance the human experience while ensuring the well-being of the earth.” Its program areas are Nuclear Disarmament & Nonproliferation and Youth. It also makes sponsored grants reflecting the philanthropic interests of family members, and offers a matching-gifts program for the Beinecke family office and foundation staff and directors.
The Nuclear Disarmament & Nonproliferation program supports policy analysis, public education, and advocacy to further arms control, reduce the threat of nuclear weapons use, and ultimately abolish nuclear weapons. The foundation says its work also addresses the humanitarian and environmental consequences of nuclear explosions, the societal costs of nuclear arsenals, and strengthening nonproliferation agreements.
The Youth program focuses on young people. In its 2023 filing, the foundation described supporting community-based organizations working with young adults and their families, as well as providing grantees with capacity-building support and organizing educational events for youth. Its sponsored grants span areas including arts and culture, environmental conservation, social change, and education.
Examples of supported organizations illustrate the range of its giving. The Trustees of Reservations, which received $75,000 in 2025, describes itself as a conservation and preservation nonprofit. Ballet Hispanico of New York, which received $50,000, says it brings communities together through Latino culture, dance training, and community engagement. The Federation of American Scientists, which received $35,000, describes its work as bringing science, technology, innovation, and experience into government and public discourse.
Grantmaking
The foundation awarded 346 grants totaling $2,612,820 in 2025. Grant amounts ranged from $50 to $75,000, with a median grant of $1,000. Recent giving totals were $2,583,324 across 295 grants in 2024 and $3,122,048 across 346 grants in 2023.
Among the largest reported 2025 grants were $75,000 each to the Arms Control Association and the Center for Arms Control and Non-Proliferation for general support, and to the Outrider Foundation for its journalism and media program. The Trustees of Reservations received $75,000 for its Bartholomew’s Cobble grouping. Other grants included $55,000 to Dana Hall School for a capital campaign; $50,000 each to Ballet Hispanico of New York, Global Greengrants Fund, and Prospect Park Alliance; and $35,000 to the Federation of American Scientists for its Nuclear Information Project.
Leadership & Key People
Leadership team and compensation from IRS filings
The foundation is governed by ten directors, whom it describes as descendants of William S. and Elizabeth G. Beinecke. Its 2025 filing lists Carrie S. Elston as president and director; Frederick W. Beinecke as vice president and director; and Elizabeth Beinecke Elston as secretary and director. Other directors listed are Benjamin B. Beinecke, Frances G. Beinecke, Jacob S. Beinecke, John B. Beinecke, Mary Beinecke Elston, Jesse W. Smith, and Sarah Beinecke Richardson.
Prospect Hill Foundation Inc is led by Carrie S. Elston, President & Director since 2022 (on filings since 2021); none of the 10 officers listed in 2025 report compensation.
Officers on the 2025 filing
Carrie S. Elston
President & Director
President → President & Director, 2022
On filings since 2021
5 hrs/week
No compensation reported
Benjamin B. Beinecke
Director
On filings since 2019
2 hrs/week
No compensation reported
Elizabeth Beinecke Elston
Secretary & Director
Director → Secretary & Director, 2024
On filings since 2019
2 hrs/week
No compensation reported
Frances G. Beinecke
Director
On filings since 2019
2 hrs/week
No compensation reported
Frederick W. Beinecke
Vice President & Director
On filings since 2019
2 hrs/week
No compensation reported
Jesse W. Smith
Director
Director → Secretary & Director, 2023
Secretary & Director → Director, 2024
On filings since 2019
2 hrs/week
No compensation reported
John B. Beinecke
Director
President & Director → President, 2021
President → Director, 2022
On filings since 2019
2 hrs/week
No compensation reported
Mary Beinecke Elston
Director
On filings since 2019
2 hrs/week
No compensation reported
Sarah Beinecke Richardson
Director
Secretary & Director → Director, 2023
On filings since 2019
2 hrs/week
No compensation reported
Maureen Howley
Treasurer
On filings since 2019
10 hrs/week
No compensation reported
Former officers (2)
- Former: Jacob S. Beinecke (2019–2025) — Director · Filing note: Until 123121
- Former: Carrie Elston Tunick (2019–2020) — Director
Data from IRS Form 990 filings, 2019–2025. "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 Prospect Hill Foundation Inc
How much does Prospect Hill Foundation Inc give each year?
Prospect Hill Foundation Inc gave $2.6M across 346 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $2.6M across 295 grants.
What is Prospect Hill Foundation Inc's typical grant size?
Prospect Hill Foundation Inc's median grant in 2025 was $1,000, and its average grant was $7,552, across 346 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Prospect Hill Foundation Inc that year got $6K on average.
Where does Prospect Hill Foundation Inc give grants?
Prospect Hill Foundation Inc's top state is New York, with 43% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were Massachusetts (15%) and District of Columbia (13%). The most frequent recipient cities were New York, NY (106 grants), Brooklyn, NY (22 grants), Washington, DC (16 grants) and Bronx, NY (13 grants).
Does Prospect Hill Foundation Inc give general operating support?
Yes: 65% of Prospect Hill Foundation Inc's 2025 grants with a stated purpose (226 of 346) were for general or operating support, per its 2025 IRS Form 990-PF. Recurring purposes include "KD Wellness for Convening" (6 grants), "KD Wellness Fund" (4 grants) and "2-Year Renewal" (4 grants).
Who are Prospect Hill Foundation Inc's largest grantees?
Prospect Hill Foundation Inc's largest 2025 grantees include Arms Control Association ($110,052 across 4 grants), Outrider Foundation ($110,000 across 2 grants) and Prospect Park Alliance ($93,000 across 4 grants), according to its 2025 IRS Form 990-PF. Together they received 12% of its itemized 2025 grant dollars.
How large is Prospect Hill Foundation Inc?
Prospect Hill Foundation Inc reported $78.4M in total assets on its 2025 IRS Form 990-PF. It paid out $3.8M in qualifying distributions that year, against a required minimum of $3.7M (roughly 5% of its investment assets).
What does Prospect Hill Foundation Inc fund?
The foundation’s mission is “to advance the human experience while ensuring the well-being of the earth.” Its program areas are Nuclear Disarmament & Nonproliferation and Youth. See mission & focus areas ↑
How do I apply for a grant from Prospect Hill Foundation Inc?
The foundation does not accept unsolicited requests for funds. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Prospect Hill Foundation Inc's EIN?
Prospect Hill Foundation Inc's EIN (Employer Identification Number) is 13-6075567. IRS Form 990 filing data is available on this page for 2019–2025.
Does Prospect Hill Foundation Inc accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated September 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS February 7, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS February 26, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS February 28, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS February 28, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS March 1, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS February 26, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS February 24, 2026)
- IRS filings on file for fiscal years 2019–2025
Explore Open Grants
Browse active grant opportunities in Prospect Hill Foundation Inc's focus areas in our free grants database
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Cite this profile
Grantable. (2026). Prospect Hill Foundation Inc funder profile. GrantGraph. Retrieved October 14, 2026, from https://grantable.co/funders/prospect-hill-foundation-inc-morg_9e57da98a40f434b8ee1001353242d9c
BibTeX
@misc{grantable_136075567_2026,
author = {{Grantable}},
title = {{Prospect Hill Foundation Inc funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/prospect-hill-foundation-inc-morg_9e57da98a40f434b8ee1001353242d9c},
note = {Accessed 2026-10-14. 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 Prospect Hill Foundation Inc'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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