Tortoise Foundation
Tortoise Foundation is a private foundation, based in New York, NY. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $76K in total assets. In 2024, it awarded 2 grants totaling $55K. Net investment income was $5K.
Tortoise Foundation at a glance
In short: Tortoise Foundation gave $55K across 2 grants in 2024 (avg $28K), mostly in New York. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $55,000
- -31.3% vs 2023
- Grants made (2024)
- 2
- +0.0% vs 2023
- Average grant
- $27,500
- -31.3% vs 2023
- Median grant
- $27,500
- Total assets
- $76,375
- -39.4% vs 2023
- Primary geography
- New York (100% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026.
Who Tortoise Foundation funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2024
The largest 2024 recipient was Carnegie Hall ($30K). Together the top 2 received $55K.
Grant Size Distribution
11 grants across all recorded years
The most common grant size was under $50K: 9 grants of 11 (82%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2024 grant dollars across all 2 itemized grants.
States
Cities
How Tortoise Foundation gives
- Giving grew 120% 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 $25K (2021) to $88K (2022). In 2024 it made 2 grants totaling $55K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Carnegie Hall New York, NY | General Purpose | $30,000 |
| Catapult Opera New York, NY | General Purpose | $25,000 |
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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 | $76,375 | $5,321 | $55,000 | $55,000 | 2 | $55,000 | $5,321 | $5,323 |
| 2023 | $126,054 | $9,156 | $80,023 | $80,000 | 2 | $80,000 | $9,133 | $8,755 |
| 2022 | $196,921 | $2,017 | $87,500 | $87,500 | 4 | $87,500 | $2,017 | $11,269 |
| 2021 | $282,404 | $39 | $25,000 | $25,000 | 1 | $25,000 | $29 | $14,369 |
| 2020 | $307,365 | $985 | $53,491 | $45,000 | 2 | — | $985 | $16,417 |
Under IRS private-foundation payout rules, Tortoise Foundation reported a distributable amount of $5K for 2024 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Tortoise Foundation's 2024 filing lists 2 officers; none of the 2 officers listed in 2024 report compensation.
Officers on the 2024 filing
Ariane Lourie Harrison
Director
On filings since 2020
1 hr/week
No compensation reported
Seth L. Harrison
Director
On filings since 2020
1 hr/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 Tortoise Foundation
How much does Tortoise Foundation give each year?
Tortoise Foundation gave $55K across 2 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $80K across 2 grants.
How large is Tortoise Foundation?
Tortoise Foundation reported $76K in total assets on its 2024 IRS Form 990-PF. It paid out $55K in qualifying distributions that year, against a required minimum of $5K (roughly 5% of its investment assets).
Where does Tortoise Foundation operate?
Tortoise Foundation has awarded grants in California, New York.
What is Tortoise Foundation's EIN?
Tortoise Foundation's EIN (Employer Identification Number) is 46-1093279. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated October 2026. Sourced from IRS Form 990-PF filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS November 15, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 16, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 15, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS November 17, 2025)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS November 17, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Tortoise Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
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Browse active grant opportunities in Tortoise Foundation's focus areas in our free grants database
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