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Nonprofit · EIN 42-1612889

LAWRENCE A & JOAN E SIFF FOUNDATION

Tax-exempt · WORCESTER, MA 01608

Financials

$4K$12K2023$10K$8K2024$21K$13K2025
Revenue Expenses · by fiscal year end
Financials of LAWRENCE A & JOAN E SIFF FOUNDATION by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-PF$20,892$13,412$7,480$129,228$0$129,228
December 31, 2024990-PF$9,510$7,628$1,882$121,748$0$121,748
December 31, 2023990-PF$3,719$11,702-$7,983$119,866$0$119,866
Financial details: 990-PF for the year ended December 31, 2025

Revenue

Dividends
$2,044
Net gain from sales of assets
$18,480
Other income
$368

Expenses

Grants and similar amounts paid
$12,356
Compensation of officers, directors and key employees
$0
Disbursements for charitable purposes
$12,356
Excise tax on investment income
$277

Balance sheet and other

Total assets, start of year
$121,748
Total assets, end of year
$129,228
Total liabilities, end of year
$0
Net assets, end of year
$129,228
Fair market value of assets
$182,679
Qualifying distributions
$12,356
Net investment income
$20,892

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 December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
LAWRENCE A SIFF
533 DUDLEY ROAD, NEWTON, MA 02459
TRUSTEE1$0
JOAN E SWARTZ-SIFF
533 DUDLEY ROAD, NEWTON, MA 02459
TRUSTEE1$0
SHIRLEY S SIFF
2000 S OCEAN BLVD, PALM BEACH, FL 33480
TRUSTEE1$0
STEFAN NATHANSON
158 GREENWOOD STREET, NEWTON, MA 02459
TRUSTEE1$0
990-PF for the year ended December 31, 2024: 4 people
NameTitleHours / weekCompensation
LAWRENCE A SIFF
533 DUDLEY ROAD, NEWTON, MA 02459
TRUSTEE1$0
JOAN E SWARTZ-SIFF
533 DUDLEY ROAD, NEWTON, MA 02459
TRUSTEE1$0
SHIRLEY S SIFF
2000 S OCEAN BLVD, PALM BEACH, FL 33480
TRUSTEE1$0
STEFAN NATHANSON
158 GREENWOOD STREET, NEWTON, MA 02459
TRUSTEE1$0
990-PF for the year ended December 31, 2023: 4 people
NameTitleHours / weekCompensation
LAWRENCE A SIFF
533 DUDLEY ROAD, NEWTON, MA 02459
TRUSTEE1$0
JOAN E SWARTZ-SIFF
533 DUDLEY ROAD, NEWTON, MA 02459
TRUSTEE1$0
SHIRLEY S SIFF
2000 S OCEAN BLVD, PALM BEACH, FL 33480
TRUSTEE1$0
STEFAN NATHANSON
158 GREENWOOD STREET, NEWTON, MA 02459
TRUSTEE1$0

Address and contacts

Address (IRS master file)
306 MAIN STREET 400, WORCESTER, MA 01608-1550
In care of
% GREENSBERG ROSENBLATT KULL &
Signed the 990-PF
LAWRENCE A SIFF, TRUSTEE
Phone
(508) 791-0901
Return prepared by
GREENBERG ROSENBLATT KULL & BITSOLIPC

What it must file and when

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

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990-PF on file
2024December 31, 2024May 15, 2025990-PF on file
2023December 31, 2023May 15, 2024990-PF on file

IRS record

EIN
42-1612889
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
2004
Accounting year ends
December
Files
Form 990-PF
Assets (IRS master file)
$129,228
Income (IRS master file)
$54,578

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2025$20,892$13,412$129,228IRS
990-PFDecember 2024$9,510$7,628$121,748IRS
990-PFDecember 2023$3,719$11,702$119,866XML
990-PFDecember 2022–––IRS
990-PFDecember 2021–––IRS
990-PFDecember 2020–––IRS
990-PFDecember 2018–––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 42-1612889).

Questions about LAWRENCE A & JOAN E SIFF FOUNDATION

What is the EIN of LAWRENCE A & JOAN E SIFF FOUNDATION?
The employer identification number (EIN) of LAWRENCE A & JOAN E SIFF FOUNDATION is 42-1612889.
Is LAWRENCE A & JOAN E SIFF FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2004.
Are donations to LAWRENCE A & JOAN E SIFF FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does LAWRENCE A & JOAN E SIFF FOUNDATION file?
Form 990-PF. Private foundations file every year.
When is the next return of LAWRENCE A & JOAN E SIFF FOUNDATION due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did LAWRENCE A & JOAN E SIFF FOUNDATION last file with the IRS?
The latest return in the IRS public files is the 990-PF for the year ended December 2025.
Who are the officers and directors of LAWRENCE A & JOAN E SIFF FOUNDATION?
The 990-PF for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
How much revenue does LAWRENCE A & JOAN E SIFF FOUNDATION have?
On its 990-PF for the year ended December 31, 2025 it reported revenue of $20,892, expenses of $13,412 and total assets of $129,228 at year end.

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