Glenbrook South Instrumental League

Glenview, IL
Tax-exempt since Aug. 1974
EIN: 23-7385862

Type of Nonprofit

Designated as a 501(c)(3) 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: Arts, Culture and Humanities / Performing Arts Schools (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. 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 May
2025

Revenue

$42,650

Expenses

$29,891

Net Income

$12,759

Net Assets

$48,587

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$0
Program Services	$0
Investment Income	$0
Net Fundraising	$17,516	41.1%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$25,134	58.9%

Assets/Debt
Total Assets	$49,393
Total Liabilities	$806
Net Assets	$48,587

Compensation

Key Employees and Officers	Compensation	Other
Beth Parker (President)	$0	$0
Laura Hancko (Treasurer)	$0	$0
Rhonda Hueblein (Secretary)	$0	$0

990-EZ

Filed on Sept. 12, 2025

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

View Filing

Schedules ▼

XML

Fiscal Year Ending May
2024

Revenue

$50,381

Expenses

$59,456

Net Income

-$9,075

Net Assets

$35,828

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$10,000	19.8%
Program Services	$33,890	67.3%
Investment Income	$0
Net Fundraising	$6,491	12.9%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$35,941
Total Liabilities	$113
Net Assets	$35,828

Compensation

Key Employees and Officers	Compensation	Other
Beth Parker (President)	$0	$0
Amy Downey (Treasurer)	$0	$0
Rhonda Hueblein (Secretary)	$0	$0

990-EZ

Filed on March 18, 2025

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

View Filing

Schedules ▼

XML

Fiscal Year Ending May
2023

Revenue

$46,674

Expenses

$39,365

Net Income

$7,309

Net Assets

$44,903

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$4,090	8.8%
Program Services	$39,466	84.6%
Investment Income	$0
Net Fundraising	$3,118	6.7%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$46,913
Total Liabilities	$2,010
Net Assets	$44,903

Compensation

Key Employees and Officers	Compensation	Other
Beth Parker (President)	$0	$0
Amy Downey (Treasurer)	$0	$0
Rhonda Hueblein (Secretary)	$0	$0

990-EZ

Filed on Oct. 16, 2023

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

View Filing

Schedules ▼

XML

Fiscal Year Ending May
2021

Revenue

$5,778

Expenses

$17,388

Net Income

-$11,610

Net Assets

$46,740

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$3,000	51.9%
Program Services	$2,778	48.1%
Investment Income	$0
Net Fundraising	$0
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$51,172
Total Liabilities	$4,432
Net Assets	$46,740

990-EZ

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

PDF

Fiscal Year Ending May
2020

Revenue

$49,446

Expenses

$52,225

Net Income

-$2,779

Net Assets

$58,350

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$1,219	2.5%
Program Services	$31,793	64.3%
Investment Income	$6	0.0%
Net Fundraising	$16,428	33.2%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$62,782
Total Liabilities	$4,432
Net Assets	$58,350

990-EZ

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

PDF

Fiscal Year Ending May
2019

Revenue

$70,356

Expenses

$66,398

Net Income

$3,958

Net Assets

$61,129

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$1,682	2.4%
Program Services	$45,773	65.1%
Investment Income	$5	0.0%
Net Fundraising	$22,896	32.5%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$73,277
Total Liabilities	$12,148
Net Assets	$61,129

990-EZ

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

PDF

Fiscal Year Ending May
2018

Revenue

$84,900

Expenses

$78,035

Net Income

$6,865

Net Assets

$57,171

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$9,017	10.6%
Program Services	$50,000	58.9%
Investment Income	$1	0.0%
Net Fundraising	$25,882	30.5%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$70,593
Total Liabilities	$13,422
Net Assets	$57,171

990-EZ

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

PDF

Fiscal Year Ending May
2017

Revenue

$122,234

Expenses

$135,372

Net Income

-$13,138

Net Assets

$50,305

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$29,985	24.5%
Program Services	$63,008	51.5%
Investment Income	$1	0.0%
Net Fundraising	$29,240	23.9%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$63,408
Total Liabilities	$13,103
Net Assets	$50,305

990-EZ

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

PDF

Fiscal Year Ending May
2016

Revenue

$79,628

Expenses

$78,533

Net Income

$1,095

Net Assets

$63,443

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$5,986	7.5%
Program Services	$47,002	59.0%
Investment Income	$2	0.0%
Net Fundraising	$26,638	33.5%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$70,506
Total Liabilities	$7,063
Net Assets	$63,443

990-EZ

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

PDF

Fiscal Year Ending May
2015

Revenue

$79,392

Expenses

$70,979

Net Income

$8,413

Net Assets

$62,348

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$12,179	15.3%
Program Services	$42,310	53.3%
Investment Income	$2	0.0%
Net Fundraising	$24,901	31.4%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$85,463
Total Liabilities	$23,115
Net Assets	$62,348

990-EZ

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

PDF

Fiscal Year Ending May
2014

Revenue

$88,971

Expenses

$80,660

Net Income

$8,311

Net Assets

$53,935

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$22,066	24.8%
Program Services	$36,336	40.8%
Investment Income	$3	0.0%
Net Fundraising	$30,566	34.4%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$63,596
Total Liabilities	$9,661
Net Assets	$53,935

990-EZ

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

PDF

Fiscal Year Ending May
2013

Revenue

$53,945

Expenses

$58,833

Net Income

-$4,888

Net Assets

$45,624

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$11,586	21.5%
Program Services	$31,077	57.6%
Investment Income	$3	0.0%
Net Fundraising	$11,279	20.9%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$57,381
Total Liabilities	$11,757
Net Assets	$45,624

990-EZ

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

PDF

Fiscal Year Ending May
2012

Revenue

$81,230

Expenses

$65,961

Net Income

$15,269

Net Assets

$50,512

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$7,697	9.5%
Program Services	$41,421	51.0%
Investment Income	$6	0.0%
Net Fundraising	$32,106	39.5%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Assets/Debt
Total Assets	$60,138
Total Liabilities	$9,626
Net Assets	$50,512

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.

API

The data powering this website is available programmatically, via an API. Read the API documentation »

See an issue with the data?

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.

Updated April 20, 2026

Glenbrook South Instrumental League

Organization summary

Type of Nonprofit

Tax Filings by Year

Fiscal Year Ending May 2025

Extracted Financial Data

Extracted Financial Data from 990-EZ

Compensation

Document Links

990-EZ

Fiscal Year Ending May 2024

Extracted Financial Data

Extracted Financial Data from 990-EZ

Compensation

Document Links

990-EZ

Fiscal Year Ending May 2023

Extracted Financial Data

Extracted Financial Data from 990-EZ

Compensation

Document Links

990-EZ

Fiscal Year Ending May 2021

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2020

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2019

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2018

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2017

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2016

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2015

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2014

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2013

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2012

Extracted Financial Data

Extracted Financial Data from 990-EZ

Document Links

990-EZ

Fiscal Year Ending May 2011

No Extracted Financial Data

Document Links

990-EZ

Fiscal Year Ending May 2010

No Extracted Financial Data

Document Links

990-EZ

Fiscal Year Ending May
2025

Fiscal Year Ending May
2024

Fiscal Year Ending May
2023

Fiscal Year Ending May
2021

Fiscal Year Ending May
2020

Fiscal Year Ending May
2019

Fiscal Year Ending May
2018

Fiscal Year Ending May
2017

Fiscal Year Ending May
2016

Fiscal Year Ending May
2015

Fiscal Year Ending May
2014

Fiscal Year Ending May
2013

Fiscal Year Ending May
2012

Fiscal Year Ending May
2011

Fiscal Year Ending May
2010

Fiscal Year Ending May
2009

Fiscal Year Ending May
2008

Fiscal Year Ending May
2007

Fiscal Year Ending May
2006

Fiscal Year Ending May
2005

Fiscal Year Ending May
2004

Fiscal Year Ending May
2003

Fiscal Year Ending May
2002