Susan Vondrak Mark Tark Foundation

Mundelein, IL
Tax-exempt since May 1975
EIN: 23-7426825

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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.

Donations to this organization are tax deductible.

Revenue

$12k (2025)

Expenses

$68.8k (2025)

Total Assets

$988k (2025)

Total Liabilities

$0 (2025)

Source: Form 990 tax filings from 2012 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 June
2025

Revenue

$12,030

Expenses

$68,808

Net Income

-$56,778

Net Assets

$988,266

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$3	0.0%
Dividends	$36,175	> 100%
Sales of Assets	-$24,148
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$59,550	86.5%
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	$988,266
Total Liabilities	$0
Net Assets	$988,266

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Nov. 14, 2025

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

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Fiscal Year Ending June
2024

Revenue

$16,227

Expenses

$69,769

Net Income

-$53,542

Net Assets

$1,045,617

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$3	0.0%
Dividends	$37,242	> 100%
Sales of Assets	-$21,018
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$60,000	86.0%
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	$1,045,617
Total Liabilities	$0
Net Assets	$1,045,617

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Sept. 25, 2024

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

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Fiscal Year Ending June
2023

Revenue

$38,873

Expenses

$68,415

Net Income

-$29,542

Net Assets

$1,097,627

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$2	0.0%
Dividends	$35,577	91.5%
Sales of Assets	$3,294	8.5%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$59,400	86.8%
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	$1,097,627
Total Liabilities	$0
Net Assets	$1,097,627

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Oct. 11, 2023

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

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Fiscal Year Ending June
2022

Revenue

$97,506

Expenses

$66,216

Net Income

$31,290

Net Assets

$1,126,554

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$4	0.0%
Dividends	$21,140	21.7%
Sales of Assets	$76,362	78.3%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$56,600	85.5%
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	$1,126,554
Total Liabilities	$0
Net Assets	$1,126,554

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Oct. 26, 2022

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

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Fiscal Year Ending June
2021

Revenue

$104,655

Expenses

$59,241

Net Income

$45,414

Net Assets

$1,095,595

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$2	0.0%
Dividends	$16,844	16.1%
Sales of Assets	$87,809	83.9%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$49,650	83.8%
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	$1,095,596
Total Liabilities	$1
Net Assets	$1,095,595

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Nov. 4, 2021

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

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Fiscal Year Ending June
2020

Revenue

$3,144

Expenses

$59,632

Net Income

-$56,488

Net Assets

$1,050,102

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$22	0.7%
Dividends	$27,130	> 100%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$49,650	83.3%
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	$1,050,103
Total Liabilities	$1
Net Assets	$1,050,102

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Nov. 2, 2020

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

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Fiscal Year Ending June
2019

Revenue

$41,649

Expenses

$63,915

Net Income

-$22,266

Net Assets

$1,108,120

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$80	0.2%
Dividends	$29,015	69.7%
Sales of Assets	$12,554	30.1%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$55,150	86.3%
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	$1,108,120
Total Liabilities	$0
Net Assets	$1,108,120

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Oct. 1, 2019

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

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Fiscal Year Ending June
2018

Revenue

$43,391

Expenses

$67,946

Net Income

-$24,555

Net Assets

$1,130,405

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$13	0.0%
Dividends	$30,907	71.2%
Sales of Assets	$12,471	28.7%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$57,550	84.7%
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	$1,130,405
Total Liabilities	$0
Net Assets	$1,130,405

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Oct. 30, 2018

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

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Fiscal Year Ending June
2017

Revenue

$40,401

Expenses

$58,289

Net Income

-$17,888

Net Assets

$1,156,739

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$5	0.0%
Dividends	$40,396	100.0%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$50,000	85.8%
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	$1,181,739
Total Liabilities	$25,000
Net Assets	$1,156,739

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Oct. 13, 2017

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

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Fiscal Year Ending June
2016

Revenue

$14,382

Expenses

$68,480

Net Income

-$54,098

Net Assets

$1,176,710

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$5	0.0%
Dividends	$31,585	> 100%
Sales of Assets	-$17,208
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$59,950	87.5%
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	$1,176,710
Total Liabilities	$0
Net Assets	$1,176,710

Compensation

Key Employees and Officers	Compensation	Other
Susan Vondrak (President)	$0	$0
Mark Tark (Vice Pres)	$0	$0

990-PF

Filed on Dec. 16, 2016

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

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Fiscal Year Ending June
2015

Revenue

$51,876

Expenses

$75,301

Net Income

-$23,425

Net Assets

$1,230,808

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$21	0.0%
Dividends	$33,593	64.8%
Sales of Assets	$18,262	35.2%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$64,520	85.7%
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	$1,230,808
Total Liabilities	$0
Net Assets	$1,230,808

990-PF

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

PDF

Fiscal Year Ending June
2014

Revenue

$9,718

Expenses

$71,700

Net Income

-$61,982

Net Assets

$1,254,233

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$4	0.0%
Dividends	$35,421	> 100%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$68,900	96.1%
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	$1,254,233
Total Liabilities	$0
Net Assets	$1,254,233

990-PF

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

PDF

Fiscal Year Ending June
2013

Revenue

$145,703

Expenses

$93,035

Net Income

$52,668

Net Assets

$1,316,214

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$69,282	47.6%
Sales of Assets	$76,421	52.4%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$91,370	98.2%
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	$1,316,215
Total Liabilities	$1
Net Assets	$1,316,214

990-PF

Filed on Dec. 20, 2013

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

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Fiscal Year Ending June
2012

Revenue

$63,288

Expenses

$102,598

Net Income

-$39,310

Net Assets

$1,263,546

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$70,041	> 100%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$92,644	90.3%
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	$1,263,547
Total Liabilities	$1
Net Assets	$1,263,546

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

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Updated January 26, 2026

Susan Vondrak Mark Tark Foundation

Organization summary

Type of Nonprofit

Summary charts: organization finances over time

Revenue $12k (2025)

Expenses $68.8k (2025)

Total Assets $988k (2025)

Total Liabilities $0 (2025)

Tax Filings by Year

Fiscal Year Ending June 2025

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2024

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2023

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2022

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2021

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2019

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2018

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2017

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2016

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending June 2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending June 2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending June 2013

Revenue

$12k (2025)

Expenses

$68.8k (2025)

Total Assets

$988k (2025)

Total Liabilities

$0 (2025)

Fiscal Year Ending June
2025

Fiscal Year Ending June
2024

Fiscal Year Ending June
2023

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2022

Fiscal Year Ending June
2021

Fiscal Year Ending June
2020

Fiscal Year Ending June
2019

Fiscal Year Ending June
2018

Fiscal Year Ending June
2017

Fiscal Year Ending June
2016

Fiscal Year Ending June
2015

Fiscal Year Ending June
2014

Fiscal Year Ending June
2013

Fiscal Year Ending June
2012

Fiscal Year Ending June
2011

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2010

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2009

Fiscal Year Ending June
2008

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2007

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2006

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2005

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2004

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2003

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2002