Isidor Wiesbader Foundation Inc

Valley Stream, NY
Tax-exempt since Sept. 1990
EIN: 11-2849212

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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

$44.9k (2025)

Expenses

$115k (2025)

Total Assets

$1.1M (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

$44,882

Expenses

$114,750

Net Income

-$69,868

Net Assets

$1,098,333

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$10,565	23.5%
Dividends	$34,317	76.5%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$107,250	93.5%
Compensation of Officers*	$7,500	6.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,098,333
Total Liabilities	$0
Net Assets	$1,098,333

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0
Andrew Diamond (President)	$0	$0

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990-PF

Filed on July 17, 2025

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

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Fiscal Year Ending June
2024

Revenue

$40,049

Expenses

$111,250

Net Income

-$71,201

Net Assets

$1,168,693

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$9,969	24.9%
Dividends	$32,222	80.5%
Sales of Assets	-$2,142
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$101,250	91.0%
Compensation of Officers*	$10,000	9.0%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,168,693
Total Liabilities	$0
Net Assets	$1,168,693

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 23, 2024

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Fiscal Year Ending June
2023

Revenue

$43,576

Expenses

$121,275

Net Income

-$77,699

Net Assets

$1,240,511

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$7,936	18.2%
Dividends	$36,528	83.8%
Sales of Assets	-$888
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$111,275	91.8%
Compensation of Officers*	$10,000	8.2%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,240,511
Total Liabilities	$0
Net Assets	$1,240,511

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 11, 2023

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Fiscal Year Ending June
2022

Revenue

$41,816

Expenses

$117,275

Net Income

-$75,459

Net Assets

$1,319,007

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$8,877	21.2%
Dividends	$37,045	88.6%
Sales of Assets	-$4,106
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$107,275	91.5%
Compensation of Officers*	$10,000	8.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,319,007
Total Liabilities	$0
Net Assets	$1,319,007

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 13, 2022

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Fiscal Year Ending June
2021

Revenue

$31,688

Expenses

$110,775

Net Income

-$79,087

Net Assets

$1,395,047

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$10,056	31.7%
Dividends	$31,906	> 100%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$103,275	93.2%
Compensation of Officers*	$7,500	6.8%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,395,048
Total Liabilities	$1
Net Assets	$1,395,047

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0
Andrew Diamond (President)	$0	$0

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990-PF

Filed on July 13, 2021

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Fiscal Year Ending June
2020

Revenue

$39,273

Expenses

$115,175

Net Income

-$75,902

Net Assets

$1,474,666

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$18,458	47.0%
Dividends	$34,742	88.5%
Sales of Assets	$0
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$105,175	91.3%
Compensation of Officers*	$10,000	8.7%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,474,667
Total Liabilities	$1
Net Assets	$1,474,666

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 22, 2020

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Fiscal Year Ending June
2019

Revenue

$83,018

Expenses

$116,055

Net Income

-$33,037

Net Assets

$1,551,081

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$20,550	24.8%
Dividends	$30,611	36.9%
Sales of Assets	$31,857	38.4%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$106,055	91.4%
Compensation of Officers*	$10,000	8.6%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,551,081
Total Liabilities	$0
Net Assets	$1,551,081

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 17, 2019

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Fiscal Year Ending June
2018

Revenue

$70,531

Expenses

$118,127

Net Income

-$47,596

Net Assets

$1,584,363

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$22,888	32.5%
Dividends	$33,905	48.1%
Sales of Assets	$13,738	19.5%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$108,127	91.5%
Compensation of Officers*	$10,000	8.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,584,363
Total Liabilities	$0
Net Assets	$1,584,363

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 24, 2018

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

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Fiscal Year Ending June
2017

Revenue

$141,084

Expenses

$105,989

Net Income

$35,095

Net Assets

$1,634,959

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$23,691	16.8%
Dividends	$34,039	24.1%
Sales of Assets	$83,354	59.1%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$95,989	90.6%
Compensation of Officers*	$10,000	9.4%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,634,959
Total Liabilities	$0
Net Assets	$1,634,959

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on Aug. 11, 2017

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Fiscal Year Ending June
2016

Revenue

$119,571

Expenses

$76,283

Net Income

$43,288

Net Assets

$1,601,648

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$22,752	19.0%
Dividends	$41,454	34.7%
Sales of Assets	$55,365	46.3%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$63,783	83.6%
Compensation of Officers*	$12,500	16.4%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,601,648
Total Liabilities	$0
Net Assets	$1,601,648

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$5,000	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 22, 2016

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Fiscal Year Ending June
2015

Revenue

$218,695

Expenses

$102,438

Net Income

$116,257

Net Assets

$1,559,763

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$15,994	7.3%
Dividends	$33,290	15.2%
Sales of Assets	$169,411	77.5%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$92,438	90.2%
Compensation of Officers*	$10,000	9.8%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,559,763
Total Liabilities	$0
Net Assets	$1,559,763

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on Aug. 5, 2015

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Fiscal Year Ending June
2014

Revenue

$46,186

Expenses

$95,671

Net Income

-$49,485

Net Assets

$1,445,010

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$1,731	3.7%
Dividends	$39,871	86.3%
Sales of Assets	$4,584	9.9%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$85,671	89.5%
Compensation of Officers*	$10,000	10.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,445,010
Total Liabilities	$0
Net Assets	$1,445,010

Compensation

Key Employees and Officers	Compensation	Other
Roberta Diamond (Treasurer)	$2,500	$0
Debra Langendorff (Secretary/Vp)	$2,500	$0
Andrew Diamond (President)	$2,500	$0
Matthew Diamond (Vice Pres)	$2,500	$0

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990-PF

Filed on July 25, 2014

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Fiscal Year Ending June
2013

Revenue

$40,449

Expenses

$90,491

Net Income

-$50,042

Net Assets

$1,494,804

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$1,850	4.6%
Dividends	$38,568	95.3%
Sales of Assets	$31	0.1%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$77,991	86.2%
Compensation of Officers*	$12,500	13.8%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,494,805
Total Liabilities	$1
Net Assets	$1,494,804

990-PF

Filed on Dec. 3, 2013

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

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Fiscal Year Ending June
2012

Revenue

$36,301

Expenses

$111,531

Net Income

-$75,230

Net Assets

$1,544,846

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$2,432	6.7%
Dividends	$33,362	91.9%
Sales of Assets	$507	1.4%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$94,031	84.3%
Compensation of Officers*	$17,500	15.7%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$1,544,847
Total Liabilities	$1
Net Assets	$1,544,846

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

Isidor Wiesbader Foundation Inc

Organization summary

Type of Nonprofit

Summary charts: organization finances over time

Revenue $44.9k (2025)

Expenses $115k (2025)

Total Assets $1.1M (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

Compensation

Document Links

990-PF

Fiscal Year Ending June 2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

Revenue

$44.9k (2025)

Expenses

$115k (2025)

Total Assets

$1.1M (2025)

Total Liabilities

$0 (2025)

Fiscal Year Ending June
2025

Fiscal Year Ending June
2024

Fiscal Year Ending June
2023

Fiscal Year Ending June
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

Fiscal Year Ending June
2010

Fiscal Year Ending June
2009

Fiscal Year Ending June
2008

Fiscal Year Ending June
2007

Fiscal Year Ending June
2006

Fiscal Year Ending June
2005

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2004

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2003

Fiscal Year Ending June
2002