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Grumman Ski Club Inc

  • Bethpage, NY
  • Tax-exempt since Dec. 1988
  • EIN: 11-2923725

Organization summary

Type of Nonprofit

Designated as a Social and recreational clubs.

Donations to this organization are not tax deductible.

Summary charts: organization finances over time

Revenue
$132k (2025)

Expenses
$138k (2025)

Total Assets
$149k (2025)

Total Liabilities
$17 (2025)

Source: Form 990 tax filings from 2011 to 2025

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 April
2025

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$132,154
Expenses
$138,066
Net Income
-$5,912
Net Assets
$149,118
Notable Sources of Revenue Percent of Total Revenue
Contributions $35,627
27.0%
Program Services $93,544
70.8%
Investment Income $2,983
2.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $149,135
Total Liabilities $17
Net Assets $149,118
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Karin Waslo (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice Preside) $0 $0 $0
Erica Lutz (Recording Se) $0 $0 $0
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Document Links

990
Filed on Sept. 11, 2025

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending April
2024

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$135,778
Expenses
$155,313
Net Income
-$19,535
Net Assets
$155,030
Notable Sources of Revenue Percent of Total Revenue
Contributions $35,711
26.3%
Program Services $98,659
72.7%
Investment Income $1,408
1.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $155,104
Total Liabilities $74
Net Assets $155,030
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Karin Waslo (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice Preside) $0 $0 $0
Margaret Conklin (Recording Se) $0 $0 $0
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990
Filed on Sept. 12, 2024

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending April
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$117,179
Expenses
$124,586
Net Income
-$7,407
Net Assets
$174,565
Notable Sources of Revenue Percent of Total Revenue
Contributions $33,594
28.7%
Program Services $83,242
71.0%
Investment Income $343
0.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $176,686
Total Liabilities $2,121
Net Assets $174,565
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Karin Waslo (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice Preside) $0 $0 $0
Margaret Conklin (Recording Se) $0 $0 $0
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990
Filed on Sept. 7, 2023

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending April
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$83,568
Expenses
$105,409
Net Income
-$21,841
Net Assets
$181,972
Notable Sources of Revenue Percent of Total Revenue
Contributions $32,497
38.9%
Program Services $51,022
61.1%
Investment Income $49
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $184,108
Total Liabilities $2,136
Net Assets $181,972
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice Preside) $0 $0 $0
Margaret Conklin (Recording Se) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 15, 2022

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$54,730
Expenses
$83,962
Net Income
-$29,232
Net Assets
$203,813
Notable Sources of Revenue Percent of Total Revenue
Contributions $29,183
53.3%
Program Services $25,506
46.6%
Investment Income $41
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $205,717
Total Liabilities $1,904
Net Assets $203,813
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice Preside) $0 $0 $0
Margaret Conklin (Recording Se) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 14, 2021

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending April
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$116,588
Expenses
$134,030
Net Income
-$17,442
Net Assets
$233,045
Notable Sources of Revenue Percent of Total Revenue
Contributions $34,538
29.6%
Program Services $82,047
70.4%
Investment Income $3
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $234,860
Total Liabilities $1,815
Net Assets $233,045
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice President) $0 $0 $0
Margaret Conklin (Recording Secretary) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 11, 2020

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending April
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$121,859
Expenses
$119,374
Net Income
$2,485
Net Assets
$250,442
Notable Sources of Revenue Percent of Total Revenue
Contributions $34,340
28.2%
Program Services $87,517
71.8%
Investment Income $2
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $252,205
Total Liabilities $1,763
Net Assets $250,442
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice President) $0 $0 $0
Margaret Conklin (Recording Secretary) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 13, 2019

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2018

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$121,940
Expenses
$140,544
Net Income
-$18,604
Net Assets
$248,107
Notable Sources of Revenue Percent of Total Revenue
Contributions $32,958
27.0%
Program Services $88,980
73.0%
Investment Income $2
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $249,316
Total Liabilities $1,209
Net Assets $248,107
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice President) $0 $0 $0
Margaret Conklin (Recording Secretary) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 10, 2018

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending April
2017

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$114,418
Expenses
$118,395
Net Income
-$3,977
Net Assets
$266,711
Notable Sources of Revenue Percent of Total Revenue
Contributions $33,460
29.2%
Program Services $80,956
70.8%
Investment Income $2
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $266,762
Total Liabilities $51
Net Assets $266,711
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
John Breuer (Vice President) $0 $0 $0
Margret Conklin (Recording Secretary) $0 $0 $0
+ View more people

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990
Filed on Sept. 12, 2017

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$108,908
Expenses
$139,360
Net Income
-$30,452
Net Assets
$270,688
Notable Sources of Revenue Percent of Total Revenue
Contributions $33,297
30.6%
Program Services $75,608
69.4%
Investment Income $3
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $270,783
Total Liabilities $95
Net Assets $270,688
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
Janice Leone (Vice President) $0 $0 $0
Cynthia Yablonski (Recording Secretary) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 14, 2016

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML
PDF (2 of 2)

Fiscal Year Ending April
2015

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$161,004
Expenses
$185,281
Net Income
-$24,277
Net Assets
$301,140
Notable Sources of Revenue Percent of Total Revenue
Contributions $62,703
38.9%
Program Services $98,298
61.1%
Investment Income $3
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $301,155
Total Liabilities $15
Net Assets $301,140
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
Janice Leone (Vice President) $0 $0 $0
Cynthia Yablonski (Recording Secretary) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 14, 2015

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2014

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$120,446
Expenses
$174,577
Net Income
-$54,131
Net Assets
$325,417
Notable Sources of Revenue Percent of Total Revenue
Contributions $35,188
29.2%
Program Services $85,235
70.8%
Investment Income $23
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $325,431
Total Liabilities $14
Net Assets $325,417
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0
Compensation
Key Employees and Officers Compensation Related Other
Isabella Stengele (President) $0 $0 $0
Christine Datz (Secretary) $0 $0 $0
Thomas Tokosh (Treasurer) $0 $0 $0
Janice Leone (Vice President) $0 $0 $0
Cynthia Yablonski (Recording Secretary) $0 $0 $0
+ View more people

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990
Filed on Sept. 5, 2014

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2013

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$120,777
Expenses
$114,430
Net Income
$6,347
Net Assets
$379,548
Notable Sources of Revenue Percent of Total Revenue
Contributions $35,192
29.1%
Program Services $85,505
70.8%
Investment Income $80
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $379,608
Total Liabilities $60
Net Assets $379,548
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0

Document Links

990
Filed on Oct. 26, 2013

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending April
2012

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$142,104
Expenses
$137,805
Net Income
$4,299
Net Assets
$404,790
Notable Sources of Revenue Percent of Total Revenue
Contributions $34,055
24.0%
Program Services $107,867
75.9%
Investment Income $182
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $404,790
Total Liabilities $0
Net Assets $404,790
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2011

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$141,733
Expenses
$106,549
Net Income
$35,184
Net Assets
$404,216
Notable Sources of Revenue Percent of Total Revenue
Contributions $36,294
25.6%
Program Services $104,951
74.0%
Investment Income $488
0.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $404,216
Total Liabilities $0
Net Assets $404,216
Club or Co-Op Income
Initiation Fees & Contributions $0
Income From Public Use of Club Facilities $0

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2010

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

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2009

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

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2008

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

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2007

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

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2006

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

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending April
2005

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

Primary tax return for a nonprofit’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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About Nonprofit Explorer

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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