Tortoise Foundation

  • New York, NY
  • Tax exemption issued: March 2014
  • EIN: 46-1093279

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Category: Philanthropy, Voluntarism and Grantmaking Foundations / Private Grantmaking Foundations (NTEE)

Donations to this organization are tax deductible.

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Organizations with gross receipts of less than $50,000 can file the form 990-N postcard filing, which doesn’t include financial details. All Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$5,321
Expenses
$55,000
Net Income
-$49,679
Net Assets
$76,375
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $2
0.0%
Dividends $5,319
100.0%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $55,000
100%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $76,375
Total Liabilities $0
Net Assets $76,375
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on Nov. 17, 2025

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$9,156
Expenses
$80,023
Net Income
-$70,867
Net Assets
$126,054
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $79
0.9%
Dividends $9,077
99.1%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $80,000
100.0%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $126,054
Total Liabilities $0
Net Assets $126,054
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on Nov. 17, 2025

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$2,017
Expenses
$87,500
Net Income
-$85,483
Net Assets
$196,921
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $2,017
100%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $87,500
100%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $196,921
Total Liabilities $0
Net Assets $196,921
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on May 15, 2023

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$39
Expenses
$25,000
Net Income
-$24,961
Net Assets
$282,404
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $29
74.4%
Sales of Assets $0
Other Income $10
25.6%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $25,000
100%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $282,404
Total Liabilities $0
Net Assets $282,404
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on May 16, 2022

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$985
Expenses
$53,491
Net Income
-$52,506
Net Assets
$307,364
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $985
100%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $45,000
84.1%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $307,365
Total Liabilities $1
Net Assets $307,364
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on Nov. 15, 2021

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$204,536
Expenses
$40,051
Net Income
$164,485
Net Assets
$359,870
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $201,219
98.4%
Interest Revenue $0
Dividends $3,317
1.6%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $40,000
99.9%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $359,871
Total Liabilities $1
Net Assets $359,870
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on July 16, 2020

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$2,893
Expenses
$10,350
Net Income
-$7,457
Net Assets
$195,386
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $2,893
100%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $10,000
96.6%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $195,386
Total Liabilities $0
Net Assets $195,386
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on May 15, 2019

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$338
Expenses
$350
Net Income
-$12
Net Assets
$202,843
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $338
100%
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $0
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $202,843
Total Liabilities $0
Net Assets $202,843
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on Nov. 15, 2018

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
-$125,652
Expenses
$150
Net Income
-$125,802
Net Assets
$202,855
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $5
Sales of Assets -$125,657
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $0
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $202,855
Total Liabilities $0
Net Assets $202,855
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on Nov. 13, 2017

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$565
Expenses
$565
Net Income
$0
Net Assets
$328,657
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $565
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $0
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $328,657
Total Liabilities $0
Net Assets $328,657
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on May 9, 2016

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$650,407
Expenses
$321,750
Net Income
$328,657
Net Assets
$328,657
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $633,839
97.5%
Interest Revenue $0
Dividends $0
Sales of Assets $16,568
2.5%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $321,750
100%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $328,657
Total Liabilities $0
Net Assets $328,657
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on May 12, 2015

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$86,048
Expenses
$86,048
Net Income
$0
Net Assets
$0
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $86,048
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $86,048
100%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $0
Total Liabilities $0
Net Assets $0
Compensation
Key Employees and Officers Compensation Other
Seth L Harrison (Director) $0 $0
Ariane Lourie Harrison (Director) $0 $0

Document Links

990-PF
Filed on May 13, 2014

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains financial information from tax returns processed by the IRS since the 2012 calendar years, as well as data extracted from digital filings. IRS summary data also includes limited older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits for nonprofit organizations that spent $750,000 or more in federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Most organizations that have been recognized as tax exempt by the IRS have to file the Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file the Form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard," which does not contain financial details. Churches are not required to file Form 990.

Nonprofit Explorer has organizations that are claiming tax exemption in any of the 27 subsections of the 501(c) section of the tax code. Taxable trusts and private foundations that are required to file a form 990PF are also included.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes Employer Identification Numbers and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

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Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

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