The Leslie and Sheila Klein
The Leslie and Sheila Klein is a private foundation focused on Medical Research, based in New Canaan, CT. IRS filing data is available from 2022 through 2025. As of 2025, the organization holds $9.7M in total assets. In 2025, it awarded 5 grants totaling $258K. Net investment income was $92K.
The Leslie and Sheila Klein at a glance
In short: The Leslie and Sheila Klein gave $258K across 5 grants in 2025 (avg $52K), mostly in New York. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $258,000
- +7.5% vs 2024
- Grants made (2025)
- 5
- +150.0% vs 2024
- Average grant
- $51,600
- -57.0% vs 2024
- Median grant
- $13,000
- Total assets
- $9,735,961
- +64.3% vs 2024
- 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 September 2026.
Who The Leslie and Sheila Klein funds
How this funder distributes its grants
Top Recipients
Top 5 recipients in 2025
The largest 2025 recipient was University of Rochester ($200K). Together the top 5 received $258K.
Grant Size Distribution
12 grants across all recorded years
The most common grant size was under $50K: 8 grants of 12 (67%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 5 itemized grants.
Cities
How The Leslie and Sheila Klein gives
- Giving grew 147% from 2022 to 2025. Method
- In 2025 it paid out 85% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. 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 2022 to 2025, annual grant giving ranged from $105K (2022) to $258K (2025). In 2025 it made 5 grants totaling $258K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Rochester Rochester, NY | Medical Research | $200,000 |
| Myotonic Dystrophy Foundation Oakland, CA | Medical Research | $25,000 |
| Silver Source Stamford, CT | General | $13,000 |
| Stamford Hospital Foundation Stamford, CT | General | $10,000 |
| United Jewish Federation of Greater Stamford, CT | General | $10,000 |
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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 | $9,735,961 | $4,071,225 | $259,488 | $258,000 | 5 | $258,000 | $92,371 | $304,959 |
| 2024 | $5,924,224 | $4,075,877 | $241,334 | $240,000 | 2 | $240,000 | $71,389 | $118,465 |
| 2023 | $2,089,681 | $117,889 | $142,399 | $135,000 | 2 | $135,000 | $77,080 | $109,932 |
| 2022 | $2,114,191 | $2,219,274 | $105,083 | $104,500 | 3 | $104,500 | $71,917 | $102,916 |
Under IRS private-foundation payout rules, The Leslie and Sheila Klein reported a distributable amount of $305K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Leslie and Sheila Klein is led by Sheila Klein, President on every filing since 2022; none of the 7 officers listed in 2025 report compensation.
Officers on the 2025 filing
Sheila Klein
President
On filings since 2022
No compensation reported
Leslie Klein
Chairperson
On filings since 2022
No compensation reported
Adina Klein
Director
On filings since 2022
No compensation reported
Jason McConnell
Director
On filings since 2022
No compensation reported
Roland Vera
Vice President
On filings since 2022
No compensation reported
Ross Smallowitz
Treasurer & S
On filings since 2022
No compensation reported
Todd Hotes
Vice President
On filings since 2022
No compensation reported
Data from IRS Form 990 filings, 2022–2025. "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 The Leslie and Sheila Klein
How much does The Leslie and Sheila Klein give each year?
The Leslie and Sheila Klein gave $258K across 5 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $240K across 2 grants.
What is The Leslie and Sheila Klein's typical grant size?
The Leslie and Sheila Klein's median grant in 2025 was $13,000, and its average grant was $51,600, across 5 grants on its 2025 IRS Form 990-PF.
Where does The Leslie and Sheila Klein give grants?
The Leslie and Sheila Klein 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 Connecticut (13%) and California (10%). The most frequent recipient cities were Stamford, CT (3 grants).
Does The Leslie and Sheila Klein give general operating support?
Yes: 60% of The Leslie and Sheila Klein's 2025 grants with a stated purpose (3 of 5) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are The Leslie and Sheila Klein's largest grantees?
The Leslie and Sheila Klein's largest 2025 grantees include University of Rochester ($200,000), Myotonic Dystrophy Foundation ($25,000) and Silver Source ($13,000), according to its 2025 IRS Form 990-PF. Together they received 92% of its itemized 2025 grant dollars.
How large is The Leslie and Sheila Klein?
The Leslie and Sheila Klein reported $9.7M in total assets on its 2025 IRS Form 990-PF. It paid out $258K in qualifying distributions that year, against a required minimum of $305K (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 is The Leslie and Sheila Klein?
The Leslie and Sheila Klein is a private foundation focused on Medical Research, based in New Canaan, CT. It holds $9.7M in total assets as of 2025.
What is The Leslie and Sheila Klein's EIN?
The Leslie and Sheila Klein's EIN (Employer Identification Number) is 87-3616373. IRS Form 990 filing data is available on this page for 2022–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(5)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 12, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 15, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 15, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 14, 2026)
- IRS filings on file for fiscal years 2022–2024
Live grants for the work The Leslie and Sheila Klein funds
Medical Research Open opportunities, soonest deadline first.
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Browse active grant opportunities in The Leslie and Sheila Klein's focus areas in our free grants database
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