The Marianthi Foundation Inc
The Marianthi Foundation Inc is a private foundation based in New York, NY. Its 2024 filing reports grants to educational institutions and a park conservancy, including Columbia University, the University of Pennsylvania, Barnard College, Bishop Hendricken High School, and Central Park Conservancy.
The Marianthi Foundation Inc at a glance
In short: The Marianthi Foundation Inc gave $75.1M across 5 grants in 2024 (avg $15.0M), mostly in New York. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $75,112,746
- +128.2% vs 2023
- Grants made (2024)
- 5
- +0.0% vs 2023
- Average grant
- $15,022,549
- +128.2% vs 2023
- Median grant
- $12,191,353
- Total assets
- $16,493,506
- -61.1% vs 2023
- Primary geography
- New York (72% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026.
How to apply to The Marianthi Foundation Inc
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: 685 Third Avenue, New York, NY 10017
Phone: (212) 503-8800
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who The Marianthi Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top 5 recipients in 2024
The largest 2024 recipient was Columbia University ($41.6M). Together the top 5 received $75.1M.
Grant Size Distribution
20 grants across all recorded years
The most common grant size was under $50K: 10 grants of 20 (50%).
Geographic Focus
Where this funder awards grants
In 2024, grant dollars went to recipients in New York (72%) and Pennsylvania (28%); the reported share for Rhode Island was 0%. Listed recipients were in New York, Pennsylvania, and Rhode Island.
Grant Distribution by State
Share of 2024 grant dollars across all 5 itemized grants.
Cities
How The Marianthi Foundation Inc gives
- Giving grew 100050% from 2021 to 2024. Method
- In 2024 it paid out well above 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 $50K (2020) to $75.1M (2024). In 2024 it made 5 grants totaling $75.1M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Columbia University New York, NY | To Further Donee's Exempt Purpose | $41,620,616 |
| University of Pennsylvania Philadelphia, PA | To Further Donee's Exempt Purpose | $21,285,777 |
| Barnard College New York, NY | To Further Donee's Exempt Purpose | $12,191,353 |
| Bishop Hendricken High School Warwick, RI | To Further Donee's Exempt Purpose | $10,000 |
| Central Park Conservancy New York, NY | To Further Donee's Exempt Purpose | $5,000 |
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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 | $16,493,506 | $3,238,142 | $75,185,851 | $75,112,746 | 5 | $75,119,443 | $3,158,273 | $2,463,435 |
| 2023 | $42,389,832 | $13,722,114 | $33,217,742 | $32,913,767 | 5 | $32,920,465 | $13,566,325 | $4,452,518 |
| 2022 | $61,504,866 | $2,033,272 | $30,356,618 | $29,270,919 | 6 | $29,280,975 | $905,577 | $5,761,073 |
| 2021 | $78,748,561 | $21,834,470 | $830,787 | $75,000 | 2 | $85,031 | $20,840,051 | $5,233,672 |
| 2020 | $57,729,878 | $1,600,193 | $307,480 | $50,000 | 2 | — | $1,434,919 | $4,227,681 |
Under IRS private-foundation payout rules, The Marianthi Foundation Inc reported a distributable amount of $2.5M 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 mission statement for the foundation is available here. Its listed 2024 recipients show support for colleges, a high school, and a park conservancy. Barnard College describes its own mission as providing a high-quality liberal arts education to promising and high-achieving young women, in partnership with a major research university.
Grantmaking
In 2024, the foundation reported five grants totaling $75,112,746. Grant amounts ranged from $5,000 to $41,620,616, with a median of $12,191,353. The largest grants were $41,620,616 to Columbia University, $21,285,777 to the University of Pennsylvania, and $12,191,353 to Barnard College. Each was designated “to further donee’s exempt purpose.”
The foundation reported six grants totaling $29,270,919 in 2022 and five grants totaling $32,913,767 in 2023.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2024 filing lists Dr. P. Roy Vagelos as president/director; Diana T. Vagelos as vice president/treasurer; and Cynthia Vagelos Roberts, Andrew Vagelos, Randall H. Vagelos, and Ellen Vagelos Masseur as directors.
The Marianthi Foundation Inc is led by P. Roy Vagelos, President & Director on every filing since 2020; none of the 6 officers listed in 2024 report compensation.
Officers on the 2024 filing
P. Roy Vagelos
President & Director
On filings since 2020
2 hrs/week
No compensation reported
Andrew Vagelos
Director
On filings since 2020
30 hrs/week
No compensation reported
Ellen Vagelos Masseur
Director
On filings since 2020
1 hr/week
No compensation reported
Mscynthia Vagelos Roberts
Director
On filings since 2020
1 hr/week
No compensation reported
Randall H. Vagelos
Director
On filings since 2020
1 hr/week
No compensation reported
Diana T. Vagelos
Vice President & Treasurer
On filings since 2020
2 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 The Marianthi Foundation Inc
How much does The Marianthi Foundation Inc give each year?
The Marianthi Foundation Inc gave $75.1M across 5 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $32.9M across 5 grants.
What is The Marianthi Foundation Inc's typical grant size?
The Marianthi Foundation Inc's median grant in 2024 was $12,191,353, and its average grant was $15,022,549, across 5 grants on its 2024 IRS Form 990-PF.
Where does The Marianthi Foundation Inc give grants?
The Marianthi Foundation Inc gives mostly in New York: 72% of the grant dollars itemized on its 2024 IRS Form 990-PF went to recipients there. The next largest state was Pennsylvania (28%). The most frequent recipient cities were New York, NY (3 grants).
Who are The Marianthi Foundation Inc's largest grantees?
The Marianthi Foundation Inc's largest 2024 grantees include Columbia University ($41,620,616), University of Pennsylvania ($21,285,777) and Barnard College ($12,191,353), according to its 2024 IRS Form 990-PF.
How large is The Marianthi Foundation Inc?
The Marianthi Foundation Inc reported $16.5M in total assets on its 2024 IRS Form 990-PF. It paid out $75.1M in qualifying distributions that year, against a required minimum of $2.5M (roughly 5% of its investment assets).
What does The Marianthi Foundation Inc fund?
No mission statement for the foundation is available here. Its listed 2024 recipients show support for colleges, a high school, and a park conservancy. See mission & focus areas ↑
How do I apply for a grant from The Marianthi Foundation Inc?
The foundation makes contributions only to preselected charitable organizations and 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 The Marianthi Foundation Inc's EIN?
The Marianthi Foundation Inc's EIN (Employer Identification Number) is 22-6616473. IRS Form 990 filing data is available on this page for 2020–2024.
Does The Marianthi Foundation Inc 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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