The Seidenberg Family Foundation Inc
The Seidenberg Family Foundation Inc is a private foundation based in New York, NY. In 2024, it made grants to organizations in areas including medical research, education, religious activity, and community services.
The Seidenberg Family Foundation Inc at a glance
In short: The Seidenberg Family Foundation Inc gave $1.2M across 31 grants in 2024 (avg $40K), mostly in New York. 26% of 2024 grantees were new. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $1,224,634
- -68.0% vs 2023
- Grants made (2024)
- 31
- -22.5% vs 2023
- Average grant
- $39,504
- -58.7% vs 2023
- Median grant
- $1,000
- Total assets
- $16,149,275
- -4.8% vs 2023
- New grantees (estimate)
- 26% first-time grantees (8 of 31, 2024)
- Primary geography
- New York (91% 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 The Seidenberg Family 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: 30 E 65Th Street 14A, New York, NY 10065
Phone: (917) 922-9354
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who The Seidenberg Family Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2024
The largest 2024 recipient was Memorial Sloan Kettering ($702K). Together the top 10 received $1.2M.
Grant Size Distribution
158 grants across all recorded years
The most common grant size was under $50K: 124 grants of 158 (78%).
Geographic Focus
Where this funder awards grants
In 2024, 91% of grant dollars went to recipients in New York, 8% to Pennsylvania, and 1% to Florida.
Grant Distribution by State
Share of 2024 grant dollars across all 31 itemized grants.
States
Cities
Is The Seidenberg Family Foundation Inc open to new grantees?
26%
first-time grantees, 2024
In 2024, 8 of 31 grantees (26%) were first-time recipients. First grants averaged $970; repeat grants $53K. How we count
Medians: $750 first-time, $3K repeat.
- 71% of 2024 grantees were also funded in 2023. Method
- Giving fell 26% from 2021 to 2024. Method
- In 2024 it paid out 151% 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 $1.2M (2024) to $3.8M (2023). In 2024 it made 31 grants totaling $1.2M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Memorial Sloan Kettering New York, NY | Research/Medical | $701,500 |
| Trustees of Columbia University New York, NY | Education | $229,300 |
| Beyond Celiac Ambler, PA | Medical Research | $90,200 |
| Boys & Girls Club of Northern Westchester Mt Kisco, NY | Educatiom/Community | $50,000 |
| Cornell University Ithaca, NY | Education | $40,000 |
| UJA Rockland New York, NY | Religious | $37,500 |
| Temple Beth Shalom Hastings on the Hudson, NY | General | $25,000 |
| Jupiter Medical Center Jupiter, FL | General | $15,000 |
| Pace University New York, NY | Education | $10,000 |
| Lustgarten Foundation Bethpage, NY | Medical | $5,000 |
Ready to take the next step with The Seidenberg Family Foundation Inc?
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 | $16,149,275 | $761,315 | $1,566,760 | $1,224,634 | 31 | $1,443,187 | $664,476 | $955,380 |
| 2023 | $16,962,471 | $2,677,636 | $4,033,070 | $3,826,727 | 40 | $3,963,982 | $2,609,818 | $954,401 |
| 2022 | $16,019,063 | $1,351,094 | $1,652,017 | $1,448,960 | 29 | $1,585,745 | $312,967 | $1,076,746 |
| 2021 | $16,403,712 | $8,772,111 | $1,854,285 | $1,658,880 | 27 | $1,762,436 | $2,131,187 | $1,009,529 |
| 2020 | $15,387,114 | $4,656,584 | $2,587,361 | $2,429,800 | 31 | — | $2,356,328 | $649,986 |
Under IRS private-foundation payout rules, The Seidenberg Family Foundation Inc reported a distributable amount of $955K 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 provided. Its 2024 grants included support for medical research and healthcare, education, religious organizations, and community services. Among its grantees, Beyond Celiac describes its mission as advancing diagnosis and research and accelerating the discovery of treatments and a cure. Student Advocacy says it provides counsel and legal representation on education matters for students facing barriers to academic success.
Grantmaking
In 2024, the foundation made 31 grants totaling $1,224,634. Grant amounts ranged from $100 to $701,500, with a median grant of $1,000. Its largest grants included $701,500 to Memorial Sloan Kettering for research/medical purposes, $229,300 to Trustees of Columbia University for education, $90,200 to Beyond Celiac for medical research, and $50,000 to Boys & Girls Club of Northern Westchester for education/community purposes.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2024 filing lists Ivan Seidenberg as chairman of the board, Phyllis Seidenberg and Douglas Seidenberg as board members, and Lisa Agdern as executive director.
The Seidenberg Family Foundation Inc is led by Lisa Agdern, Executive Director on every filing since 2020; 1 of 4 officers listed in 2024 is compensated.
Officers on the 2024 filing
Lisa Agdern
Executive Director
On filings since 2020
30 hrs/week
$84K (2020) → $202K (2024)
Ivan Seidenberg
Chairman of the Board
On filings since 2020
3 hrs/week
No compensation reported
Douglas Seidenberg
Board Member
On filings since 2020
1 hr/week
No compensation reported
Phyllis Seidenberg
Board Member
On filings since 2020
3 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.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $202K, to Lisa Agdern (Executive Director).
Frequently asked questions about The Seidenberg Family Foundation Inc
How much does The Seidenberg Family Foundation Inc give each year?
The Seidenberg Family Foundation Inc gave $1.2M across 31 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $3.8M across 40 grants.
What is The Seidenberg Family Foundation Inc's typical grant size?
The Seidenberg Family Foundation Inc's median grant in 2024 was $1,000, and its average grant was $39,504, across 31 grants on its 2024 IRS Form 990-PF. Organizations receiving their first grant from The Seidenberg Family Foundation Inc that year got $970 on average.
Where does The Seidenberg Family Foundation Inc give grants?
The Seidenberg Family Foundation Inc gives mostly in New York: 91% of the grant dollars itemized on its 2024 IRS Form 990-PF went to recipients there. The next largest state was Pennsylvania (8%). The most frequent recipient cities were New York, NY (8 grants), Mt Kisco, NY (2 grants) and Chappaqua, NY (2 grants).
Does The Seidenberg Family Foundation Inc give general operating support?
Yes: 26% of The Seidenberg Family Foundation Inc's 2024 grants with a stated purpose (8 of 31) were for general or operating support, per its 2024 IRS Form 990-PF. Recurring purposes include "Education" (8 grants), "Healthcare" (4 grants) and "Research" (3 grants).
Who are The Seidenberg Family Foundation Inc's largest grantees?
The Seidenberg Family Foundation Inc's largest 2024 grantees include Memorial Sloan Kettering ($701,500), Trustees of Columbia University ($229,300) and Beyond Celiac ($90,200), according to its 2024 IRS Form 990-PF. Together they received 83% of its itemized 2024 grant dollars.
How large is The Seidenberg Family Foundation Inc?
The Seidenberg Family Foundation Inc reported $16.1M in total assets on its 2024 IRS Form 990-PF. It paid out $1.4M in qualifying distributions that year, against a required minimum of $955K (roughly 5% of its investment assets).
What does The Seidenberg Family Foundation Inc fund?
No mission statement for the foundation is provided. Its 2024 grants included support for medical research and healthcare, education, religious organizations, and community services. See mission & focus areas ↑
How do I apply for a grant from The Seidenberg Family 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 Seidenberg Family Foundation Inc's EIN?
The Seidenberg Family Foundation Inc's EIN (Employer Identification Number) is 06-1386525. IRS Form 990 filing data is available on this page for 2020–2024.
Does The Seidenberg Family 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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Cite this profile
Grantable. (2026). The Seidenberg Family Foundation Inc funder profile. GrantGraph. Retrieved October 23, 2026, from https://grantable.co/funders/the-seidenberg-family-foundation-inc-morg_78475aeae1e345a7849215d199e4ecf3
BibTeX
@misc{grantable_061386525_2026,
author = {{Grantable}},
title = {{The Seidenberg Family Foundation Inc funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/the-seidenberg-family-foundation-inc-morg_78475aeae1e345a7849215d199e4ecf3},
note = {Accessed 2026-10-23. 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 The Seidenberg Family 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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