The Clamshell Foundation Inc
The Clamshell Foundation Inc is a public charity focused on Environment & Animals, based in East Hampton, NY. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $41K in total assets.
The Clamshell Foundation Inc at a glance
- Total assets
- $40,601
- -7.8% vs 2024
- Revenue (2025)
- $38,046
- +434.6% vs 2024
- Expenses (2025)
- $41,466
- +42.6% vs 2024
- Latest 990 filing
- Form 990-EZ, 2025 View filing
Data from IRS Form 990-EZ, 2025; updated September 2026.
Who The Clamshell Foundation Inc funds
Geographic Focus
Where this funder awards grants
States
Cities
Giving History
Giving Over Time
Total grant dollars and number of grants per year
In 2020 it made 8 grants totaling $273K.
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants |
|---|---|---|---|---|---|
| 2025 | $40,601 | $38,046 | $41,466 | — | — |
| 2024 | $44,021 | $7,117 | $29,083 | — | — |
| 2023 | $65,987 | $22,518 | $85,542 | — | — |
| 2022 | $129,011 | $54,401 | $68,143 | — | — |
| 2021 | $142,753 | $93,230 | $87,054 | — | — |
| 2020 | $136,577 | $493,121 | $367,684 | $272,968 | 8 |
Leadership & Key People
Officers and directors from IRS filings
The Clamshell Foundation Inc is led by William Kalbacher, CEO on every filing since 2020; none of the 6 officers listed in 2025 report compensation.
Officers on the 2025 filing
William Kalbacher
CEO
On filings since 2020
10 hrs/week
No compensation reported
Kori Peters
Executive Director
President → Executive Director, 2021
On filings since 2020
1 hr/week
No compensation reported
Jill Kalbacher
Director
On filings since 2020
1 hr/week
No compensation reported
Robert Peters Jr.
Director
On filings since 2020
1 hr/week
No compensation reported
Janice Vaziri
Treasurer
On filings since 2020
4 hrs/week
$6K (2020) → $0 (2025)
Kelsey Demarquez
Secretary
On filings since 2020
2 hrs/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.
Compensation Overview
From 2021 IRS filing
The highest reported compensation on the 2021 filing was $5K, to Janice Vaziri (Treasurer).
Frequently asked questions about The Clamshell Foundation Inc
How large is The Clamshell Foundation Inc?
The Clamshell Foundation Inc reported $41K in total assets on its 2025 IRS Form 990-EZ. Its revenue that year was $38K.
What is The Clamshell Foundation Inc?
The Clamshell Foundation Inc is a public charity focused on Environment & Animals, based in East Hampton, NY. It holds $41K in total assets as of 2025.
Where does The Clamshell Foundation Inc operate?
The Clamshell Foundation Inc has awarded grants in New York.
What is The Clamshell Foundation Inc's EIN?
The Clamshell Foundation Inc's EIN (Employer Identification Number) is 11-3227901. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS October 7, 2021)
- Updated Form 990-EZ for fiscal year 2021 (received by the IRS October 13, 2022)
- Updated Form 990-EZ for fiscal year 2022 (received by the IRS October 30, 2023)
- Updated Form 990-EZ for fiscal year 2023 (received by the IRS November 12, 2024)
- Updated Form 990-EZ for fiscal year 2024 (received by the IRS July 8, 2025)
- Added Form 990-EZ for fiscal year 2025 (received by the IRS May 14, 2026)
Live grants for the work The Clamshell Foundation Inc funds
Environment & Animals Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in The Clamshell Foundation Inc's focus areas in our free grants database
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The Clamshell Foundation Inc down — hundreds of funders to go?