Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 11-2849212

ISIDOR WIESBADER FOUNDATION INC

Tax-exempt · VALLEY STREAM, NY 11580

Financials

$40K$111K2023$45K$115K2024$232K$130K2025
Revenue Expenses · by fiscal year end
Financials of ISIDOR WIESBADER FOUNDATION INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
June 30, 2026990-PF$231,528$129,850$101,678$1,199,311$0$1,199,311
June 30, 2025990-PF$44,882$114,750-$69,868$1,098,333$0$1,098,333
June 30, 2024990-PF$40,049$111,250-$71,201$1,168,693$0$1,168,693
Financial details: 990-PF for the year ended June 30, 2026

Revenue

Dividends
$31,794
Interest
$17,363
Net gain from sales of assets
$182,371

Expenses

Grants and similar amounts paid
$112,000
Compensation of officers, directors and key employees
$12,500
Disbursements for charitable purposes
$117,350
Excise tax on investment income
$683

Balance sheet and other

Total assets, start of year
$1,098,333
Total assets, end of year
$1,199,311
Total liabilities, end of year
$0
Net assets, end of year
$1,199,311
Fair market value of assets
$2,768,306
Qualifying distributions
$117,350
Net investment income
$49,157

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990-PF for the year ended June 30, 2026, highest compensation first.

NameTitleHours / weekCompensation
MATTHEW DIAMOND
15 FRANKLIN ROAD, LEXINGTON, MA 02420
VICE-PRES0$5,000
ROBERTA DIAMOND
16 MCCARTHY ROAD, ISLAND PARK, NY 11558
TREASURER0$2,500
DEBRA LANGENDORFF
33 NEWKIRK AVENUE, EAST ROCKAWAY, NY 11518
SECRETARY/VP0$2,500
ANDREW DIAMOND
C/O VENABLE LLP, 1270 AVENUE OF THE AMERICAS 25TH FL, NEW YORK, NY 100201806
PRESIDENT0$2,500
990-PF for the year ended June 30, 2025: 4 people
NameTitleHours / weekCompensation
ROBERTA DIAMOND
16 MCCARTHY ROAD, ISLAND PARK, NY 11558
TREASURER0$2,500
DEBRA LANGENDORFF
33 NEWKIRK AVENUE, EAST ROCKAWAY, NY 11518
SECRETARY/VP0$2,500
MATTHEW DIAMOND
15 FRANKLIN ROAD, LEXINGTON, MA 02420
VICE-PRES0$2,500
ANDREW DIAMOND
C/O VENABLE LLP, 1270 AVENUE OF THE AMERICAS 25TH FL, NEW YORK, NY 100201806
PRESIDENT0$0
990-PF for the year ended June 30, 2024: 4 people
NameTitleHours / weekCompensation
ROBERTA DIAMOND
16 MCCARTHY ROAD, ISLAND PARK, NY 11558
TREASURER0$2,500
DEBRA LANGENDORFF
33 NEWKIRK AVENUE, EAST ROCKAWAY, NY 11518
SECRETARY/VP0$2,500
ANDREW DIAMOND
C/O VENABLE LLP, 1270 AVENUE OF THE AMERICAS 25TH FL, NEW YORK, NY 100201806
PRESIDENT0$2,500
MATTHEW DIAMOND
15 FRANKLIN ROAD, LEXINGTON, MA 02420
VICE-PRES0$2,500

Address and contacts

Address (IRS master file)
C/O SHB 108 S FRANKLIN AVENUE STE 1, VALLEY STREAM, NY 11580-0000
In care of
% BERNSTEIN
Signed the 990-PF
ROBERTA DIAMOND, TREASURER
Phone
(516) 561-9333
Return prepared by
SH BERNSTEIN & ASSOC CPA PC

What it must file and when

IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026990-PF on file
2024June 30, 2025November 17, 2025990-PF on file
2023June 30, 2024November 15, 2024990-PF on file

IRS record

EIN
11-2849212
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Private non-operating foundation
Donations deductible (Pub 78)
Private foundation, 30% limit
Exempt since
1990
Accounting year ends
June
Files
Form 990-PF
Assets (IRS master file)
$1,199,311
Income (IRS master file)
$483,164

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFJune 2026$231,528$129,850$1,199,311XML
990-PFJune 2025$44,882$114,750$1,098,333XML
990-PFJune 2024$40,049$111,250$1,168,693XML
990-PFJune 2023–––IRS
990-PFJune 2022–––IRS
990-PFJune 2021–––IRS
990-PFJune 2020–––IRS
990-PFJune 2019–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 11-2849212).

Questions about ISIDOR WIESBADER FOUNDATION INC

What is the EIN of ISIDOR WIESBADER FOUNDATION INC?
The employer identification number (EIN) of ISIDOR WIESBADER FOUNDATION INC is 11-2849212.
Is ISIDOR WIESBADER FOUNDATION INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1990.
Are donations to ISIDOR WIESBADER FOUNDATION INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does ISIDOR WIESBADER FOUNDATION INC file?
Form 990-PF. Private foundations file every year.
When is the next return of ISIDOR WIESBADER FOUNDATION INC due?
The return for tax year 2026 (the year ending June 30, 2027) is due November 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did ISIDOR WIESBADER FOUNDATION INC last file with the IRS?
The latest return in the IRS public files is the 990-PF for the year ended June 2026.
Who are the officers and directors of ISIDOR WIESBADER FOUNDATION INC?
The 990-PF for the year ended June 30, 2026 lists 4 people; 4 received compensation from the organization, the highest $5,000 (MATTHEW DIAMOND, VICE-PRES).
How much revenue does ISIDOR WIESBADER FOUNDATION INC have?
On its 990-PF for the year ended June 30, 2026 it reported revenue of $231,528, expenses of $129,850 and total assets of $1,199,311 at year end.

Other nonprofits in VALLEY STREAM

All nonprofits in VALLEY STREAM · New York