Janet & Robert W Postma Foundation
The Janet & Robert W Postma Foundation is a private foundation based in Water Mill, New York. Its 2025 filing reports grants to charitable organizations, with most grant dollars going to recipients in New York.
Janet & Robert W Postma Foundation at a glance
In short: Janet & Robert W Postma Foundation gave $469K across 31 grants in 2025 (avg $15K), mostly in New York. 32% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $469,000
- +11.1% vs 2024
- Grants made (2025)
- 31
- +0.0% vs 2024
- Average grant
- $15,129
- +11.1% vs 2024
- Median grant
- $10,000
- Total assets
- $4,106,547
- -16.4% vs 2024
- New grantees (estimate)
- 32% first-time grantees (10 of 31, 2025)
- Primary geography
- New York (78% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Janet & Robert W Postma Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: 141 Mecox Rd PO Box 207, Water Mill, NY 11976
Phone: (631) 804-9883
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Janet & Robert W Postma Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Southhampton Hospital Foundation ($100K). Together the top 10 received $353K.
Grant Size Distribution
105 grants across all recorded years
The most common grant size was under $50K: 97 grants of 105 (92%).
Geographic Focus
Where this funder awards grants
In 2025, 78% of grant dollars went to recipients in New York, 11% to recipients in Washington, DC, 5% to Pennsylvania, 3% to New Jersey, and 2% to Illinois.
Grant Distribution by State
Share of 2025 grant dollars across all 31 itemized grants.
Cities
Is Janet & Robert W Postma Foundation open to new grantees?
32%
first-time grantees, 2025
In 2025, 10 of 31 grantees (32%) were first-time recipients. First grants averaged $18K; repeat grants $14K. How we count
Medians: $6K first-time, $10K repeat.
- 58% of 2025 grantees were also funded in 2024. Method
- Giving grew 271% from 2022 to 2025. Method
- In 2025 it paid out 81% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2021–2025). 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 2021 to 2025, annual grant giving ranged from $101K (2023) to $469K (2025). In 2025 it made 31 grants totaling $469K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Southhampton Hospital Foundation Southampton, NY | Tax Exempt Contribution | $100,000 |
| North Sea Maritime Center Southampton, NY | Tax Exempt Contribution | $51,500 |
| HSS Foundation New York, NY | Tax Exempt Contribution | $51,000 |
| Leadership Roundtable Washington, DC | Tax Exempt Contribution | $50,000 |
| CMTA Glenolden, PA | Tax Exempt Contribution | $25,000 |
| EEDA Foundation Riverhead, NY | Tax Exempt Contribution | $20,000 |
| Ichan School of Medicine New York, NY | Tax Exempt Contribution | $15,000 |
| Water Mill Improvement Assoc Water Mill, NY | Tax Exempt Contribution | $15,000 |
| Sag Harbor Lions Club Pierson Schol Sag Harbor, NY | Tax Exempt Contribution | $14,000 |
| MET PGA Foundation Elmsford, NY | Tax Exempt Contribution | $11,000 |
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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 | $4,106,547 | $-329,771 | $475,420 | $469,000 | 31 | $475,000 | $3,661 | $584,844 |
| 2024 | $4,911,738 | $-593,380 | $470,294 | $422,250 | 31 | $468,450 | — | $499,906 |
| 2023 | $5,975,412 | $-38,360 | $105,596 | $101,000 | 15 | $103,557 | — | $285,656 |
| 2022 | $6,119,368 | $1,098 | $158,844 | $126,570 | 14 | $134,790 | — | $243,698 |
| 2021 | $6,277,114 | $1,437,288 | $156,174 | $149,720 | 14 | $152,712 | $1,433,826 | $261,952 |
| 2020 | $4,996,000 | $6,469,500 | — | — | — | — | — | $12,810 |
Under IRS private-foundation payout rules, Janet & Robert W Postma Foundation reported a distributable amount of $585K 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
No mission statement for the foundation is provided. Its 2025 grantees describe a range of activities: North Sea Maritime Center says it is raising funds to continue its Tupper Boat House project, while Leadership Roundtable works with Catholic leaders and organizations on management and leadership practices. SNACK & Friends says it offers classes and activities for people of all abilities; The Retreat provides safety, shelter, and support to people affected by domestic abuse and related violence. Other grantees include a scholarship fund for local East End high school seniors and a youth soccer association.
Grantmaking
In 2025, the foundation reported 31 grants totaling $469,000. Grants ranged from $250 to $100,000, with a median of $10,000.
Among the largest grants were $100,000 to Southampton Hospital Foundation, $51,500 to North Sea Maritime Center, $51,000 to HSS Foundation, $50,000 to Leadership Roundtable, and $25,000 to CMTA. Other listed grants included $20,000 to EEDA Foundation; $15,000 each to Ichan School of Medicine and Water Mill Improvement Assoc; and $14,000 to Sag Harbor Lions Club Pierson Schol.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Robert W Postma as President, Janet Whalen as VP Secretary Treasurer, and Kristen Slaoui as Director.
Janet & Robert W Postma Foundation is led by Robert W Postma, President since 2024 (on filings since 2020); none of the 3 officers listed in 2025 report compensation.
Officers on the 2025 filing
Robert W Postma
President
President & Director → President, 2024
On filings since 2020
1 hr/week
No compensation reported
Kristen Slaoui
Director
On filings since 2020
1 hr/week
No compensation reported
Janet Whalen
Vice President Secretary Treasurer
Vice President, Secretary, Treasurer & Director → Vice President Secretary Treasurer, 2024
On filings since 2020
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2020–2025. "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 Janet & Robert W Postma Foundation
How much does Janet & Robert W Postma Foundation give each year?
Janet & Robert W Postma Foundation gave $469K across 31 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $422K across 31 grants.
What is Janet & Robert W Postma Foundation's typical grant size?
Janet & Robert W Postma Foundation's median grant in 2025 was $10,000, and its average grant was $15,129, across 31 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Janet & Robert W Postma Foundation that year got $18K on average.
Where does Janet & Robert W Postma Foundation give grants?
Janet & Robert W Postma Foundation gives mostly in New York: 78% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were District of Columbia (11%) and Pennsylvania (5%). The most frequent recipient cities were East Hampton, NY (4 grants), Southampton, NY (3 grants), New York, NY (3 grants) and Sag Harbor, NY (2 grants).
Who are Janet & Robert W Postma Foundation's largest grantees?
Janet & Robert W Postma Foundation's largest 2025 grantees include Southhampton Hospital Foundation ($100,000), North Sea Maritime Center ($51,500) and HSS Foundation ($51,000), according to its 2025 IRS Form 990-PF. Together they received 43% of its itemized 2025 grant dollars.
How large is Janet & Robert W Postma Foundation?
Janet & Robert W Postma Foundation reported $4.1M in total assets on its 2025 IRS Form 990-PF. It paid out $475K in qualifying distributions that year, against a required minimum of $585K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
What does Janet & Robert W Postma Foundation fund?
No mission statement for the foundation is provided. See mission & focus areas ↑
How do I apply for a grant from Janet & Robert W Postma Foundation?
The foundation states that it 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 Janet & Robert W Postma Foundation's EIN?
Janet & Robert W Postma Foundation's EIN (Employer Identification Number) is 85-3636639. IRS Form 990 filing data is available on this page for 2020–2025.
Does Janet & Robert W Postma Foundation 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
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 14, 2026)
- IRS filings on file for fiscal years 2020–2024
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Cite this profile
Grantable. (2026). Janet & Robert W Postma Foundation funder profile. GrantGraph. Retrieved October 15, 2026, from https://grantable.co/funders/janet-and-robert-w-postma-foundation-morg_dc08f023ae4d4a7eaed665d71344e4c2
BibTeX
@misc{grantable_853636639_2026,
author = {{Grantable}},
title = {{Janet \& Robert W Postma Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/janet-and-robert-w-postma-foundation-morg_dc08f023ae4d4a7eaed665d71344e4c2},
note = {Accessed 2026-10-15. 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 Janet & Robert W Postma 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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