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Guston Foundation

  • West Hurley, NY
  • Tax-exempt since May 2013
  • EIN: 46-1575176

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 Operating Foundations (NTEE)

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$1.86M (2024)

Expenses
$1.41M (2024)

Total Assets
$59M (2024)

Total Liabilities
$0 (2024)

Years with missing data
Source: Form 990 tax filings from 2012 to 2024

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. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$1,856,500
Expenses
$1,406,851
Net Income
$449,649
Net Assets
$58,993,043
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $45,396
2.4%
Dividends $696,754
37.5%
Sales of Assets $1,109,115
59.7%
Other Income $5,235
0.3%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $1,323,071
94.0%
Compensation of Officers* $204,454
14.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $58,993,043
Total Liabilities $0
Net Assets $58,993,043
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Executive Director) $194,454 $25,525
Gretchen Opie (Database Developer) $91,731 $19,573
Kerrigan Kessler (Archive Cataloguer) $83,571 $18,547
Mark Mann (Digital Technician) $58,173 $18,246
Keldon Polacco (Digital Technician) $52,375 $17,814
Michael Conforti (Director) $5,000 $0
Maurice M Reder (Former Director (Thru 10/01/2023)) $5,000 $0
Musa Mayer (Director, President) $0 $0
Thomas Mayer (Director, Vice President, Secretary) $0 $0
Kerrie Buitrago (Director (Began 10/10/2024)) $0 $0
Harry Cooper (Director (Began 10/10/2024)) $0 $0
Pamela Mayer (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Sept. 19, 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
$1,247,382
Expenses
$1,210,324
Net Income
$37,058
Net Assets
$57,505,956
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $31,949
2.6%
Dividends $642,783
51.5%
Sales of Assets $572,564
45.9%
Other Income $86
0.0%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $1,131,118
93.5%
Compensation of Officers* $186,182
15.4%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $57,505,956
Total Liabilities $0
Net Assets $57,505,956
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Executive Director) $181,182 $25,752
Kerrigan Kessler (Archive Cataloguer) $82,550 $18,523
Mark Mann (Digital Technician) $53,731 $17,792
Consuelo Ribes (Assistant To Executi) $51,615 $3,965
Gretchen Opie (Database Developer) $50,192 $7,007
Michael Conforti (Director) $5,000 $0
Musa Mayer (Director, President) $0 $0
Thomas Mayer (Director, Vice President) $0 $0
Maurice M Reder (Director, Treasurer (Thru 10.01.2023)) $0 $0
Pamela A Mayer (Director) $0 $0
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Document Links

990-PF
Filed on April 11, 2024

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$244,315
Expenses
$1,221,887
Net Income
-$977,572
Net Assets
$55,406,105
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $4,618
1.9%
Dividends $444,350
> 100%
Sales of Assets -$204,653
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $1,137,692
93.1%
Compensation of Officers* $177,020
14.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $55,406,105
Total Liabilities $0
Net Assets $55,406,105
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Executive Director) $167,020 $22,883
Jorge Guillen (Website Developer) $53,620 $11,270
Maurice M Reder (Director, Treasurer) $5,000 $0
Michael Conforti (Director) $5,000 $0
Musa Mayer (Director, President) $0 $0
Thomas Mayer (Director, Vice President) $0 $0
Pamela A Mayer (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Aug. 8, 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
$952,376
Expenses
$1,111,429
Net Income
-$159,053
Net Assets
$60,484,590
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $13
0.0%
Dividends $372,764
39.1%
Sales of Assets $579,599
60.9%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $1,023,497
92.1%
Compensation of Officers* $162,700
14.6%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $60,484,590
Total Liabilities $0
Net Assets $60,484,590
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Executive Director) $152,700 $20,570
Jonathan Kadish (Senior Web Developer) $83,386 $16,221
Natalie Donohue (Assistant To Executi) $58,370 $16,196
Maurice M Reder (Director, Treasurer) $5,000 $0
Michael Conforti (Director) $5,000 $0
Musa Mayer (Director, President) $0 $0
Thomas Mayer (Director, Vice President) $0 $0
Pamela A Mayer (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on April 6, 2022

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

View Filing
XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$1,809,426
Expenses
$1,010,021
Net Income
$799,405
Net Assets
$59,027,757
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $1,000,000
55.3%
Interest Revenue $606
0.0%
Dividends $381,257
21.1%
Sales of Assets $427,226
23.6%
Other Income $337
0.0%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $931,001
92.2%
Compensation of Officers* $155,846
15.4%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $59,027,758
Total Liabilities $1
Net Assets $59,027,757
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Executive Director) $145,846 $23,474
Jonathan Kadish (Senior Web Developer) $93,900 $31,660
Natalie Donohue (Assistant To Executi) $54,082 $18,867
Maurice M Reder (Director, Treasurer) $5,000 $0
Michael Conforti (Director) $5,000 $0
Musa Mayer (Director, President) $0 $0
Thomas Mayer (Director, Vice President) $0 $0
Pamela A Mayer (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on May 6, 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
$756,558
Expenses
$947,198
Net Income
-$190,640
Net Assets
$55,847,024
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $9,623
1.3%
Dividends $515,059
68.1%
Sales of Assets $231,876
30.6%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $871,377
92.0%
Compensation of Officers* $135,695
14.3%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $55,847,025
Total Liabilities $1
Net Assets $55,847,024
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Executive Director) $125,695 $17,913
Jonathan Kadish (Senior Web Developer) $81,900 $32,311
Natalie Donohue (Assistant To Executi) $52,757 $13,465
Maurice M Reder (Director/Treasurer) $5,000 $0
Michael Conforti (Director) $5,000 $0
Musa J Mayer (Director/President) $0 $0
Thomas Mayer (Director/Vice President) $0 $0
Pamela A Mayer (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on July 1, 2020

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2018

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-PF

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

PDF

Fiscal Year Ending Dec.
2017

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-PF

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

PDF

Fiscal Year Ending Dec.
2016

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-PF

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

PDF

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$5,503,926
Expenses
$384,742
Net Income
$5,119,184
Net Assets
$10,214,808
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $5,244,143
95.3%
Interest Revenue $51
0.0%
Dividends $101,933
1.9%
Sales of Assets $157,799
2.9%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $341,108
88.7%
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 $10,216,092
Total Liabilities $1,284
Net Assets $10,214,808
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Archivist) $101,923 $0
Jonathan Kadish (Web Designer) $79,500 $0
Musa J Mayer (President) $0 $0

Document Links

990-PF
Filed on May 13, 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
$3,508,705
Expenses
$364,464
Net Income
$3,144,241
Net Assets
$5,357,047
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $3,379,925
96.3%
Interest Revenue $70
0.0%
Dividends $46,559
1.3%
Sales of Assets $81,783
2.3%
Other Income $368
0.0%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $336,225
92.3%
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 $5,359,692
Total Liabilities $2,645
Net Assets $5,357,047
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Archivist) $100,000 $0
Jonathan Kadish (Web Designer) $78,000 $0
Musa J Mayer (President) $0 $0

Document Links

990-PF
Filed on May 15, 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
$2,007,410
Expenses
$257,921
Net Income
$1,749,489
Net Assets
$2,188,688
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $1,971,944
98.2%
Interest Revenue $0
Dividends $2,126
0.1%
Sales of Assets $33,340
1.7%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $243,326
94.3%
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 $2,188,688
Total Liabilities $0
Net Assets $2,188,688
Compensation
Key Employees and Officers Compensation Other
Sarah Radic (Archivist) $96,539 $0
Jonathan Kadish (Web Designer) $52,500 $0
Musa J Mayer (President) $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

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$448,624
Expenses
$0
Net Income
$448,624
Net Assets
$448,624
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $450,000
> 100%
Interest Revenue $0
Dividends $9
0.0%
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 $448,624
Total Liabilities $0
Net Assets $448,624

Document Links

990-PF

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

PDF

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 information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include 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 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?

Every organization that has been recognized as tax exempt by the IRS has to file 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 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."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

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 EINs 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. Bulk PDF downloads since 2017 are available from the IRS.
  • 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.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

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