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Nonprofit · EIN 13-6151289

KINGSBERG FOUNDATION

Tax-exempt · PRINCETON, NJ 08540

Financials

−$1.1M$1.1M2023$2M$1.5M2024$3.9M$1.8M2025
Revenue Expenses · by fiscal year end
Financials of KINGSBERG FOUNDATION by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-PF$3,923,012$1,754,457$2,168,555$30,489,228$0$30,489,228
December 31, 2024990-PF$2,027,000$1,476,384$550,616$27,841,772$0$27,841,772
December 31, 2023990-PF-$1,073,078$1,092,475-$2,165,553$27,291,156$0$27,291,156
Financial details: 990-PF for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$0
Dividends
$642,975
Interest
$4,897
Net gain from sales of assets
$3,275,140

Expenses

Grants and similar amounts paid
$1,555,987
Compensation of officers, directors and key employees
$0
Disbursements for charitable purposes
$1,564,775
Excise tax on investment income
$52,543

Balance sheet and other

Total assets, start of year
$27,841,772
Total assets, end of year
$30,489,228
Total liabilities, end of year
$0
Net assets, end of year
$30,489,228
Fair market value of assets
$35,270,354
Qualifying distributions
$1,564,775
Net investment income
$3,921,728

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
RUTH J KINGSBERG DEC'D 102025
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE1$0
ALAN D KINGSBERG
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE2$0
SALLY ANNE KELLER
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE2$0
990-PF for the year ended December 31, 2024: 3 people
NameTitleHours / weekCompensation
RUTH J KINGSBERG
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE2$0
ALAN D KINGSBERG
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE2$0
SALLY ANNE KELLER
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE2$0
990-PF for the year ended December 31, 2023: 3 people
NameTitleHours / weekCompensation
RUTH J KINGSBERG
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE2$0
ALAN D KINGSBERG
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE1$0
SALLY ANNE KELLER
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540
TRUSTEE1$0

Address and contacts

Address (IRS master file)
C/O WSB 506 CARNEGIE CENTER STE 400, PRINCETON, NJ 08540-0000
In care of
% WITHUMSMITHBROWN PC
Signed the 990-PF
Sally Anne Keller, Trustee
Phone
(609) 520-1188
Return prepared by
WITHUM SMITH BROWN 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 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
13-6151289
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
1955
Accounting year ends
December
Files
Form 990-PF
Assets (IRS master file)
$30,489,228
Income (IRS master file)
$3,923,012

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2025$3,923,012$1,754,457$30,489,228XML
990-PFDecember 2024$2,027,000$1,476,384$27,841,772XML
990-PFDecember 2023-$1,073,078$1,092,475$27,291,156XML
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 13-6151289).

Questions about KINGSBERG FOUNDATION

What is the EIN of KINGSBERG FOUNDATION?
The employer identification number (EIN) of KINGSBERG FOUNDATION is 13-6151289.
Is KINGSBERG FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1955.
Are donations to KINGSBERG FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does KINGSBERG FOUNDATION file?
Form 990-PF. Private foundations file every year.
When is the next return of KINGSBERG 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 KINGSBERG 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 KINGSBERG FOUNDATION?
The 990-PF for the year ended December 31, 2025 lists 3 people; 0 received compensation from the organization.
How much revenue does KINGSBERG FOUNDATION have?
On its 990-PF for the year ended December 31, 2025 it reported revenue of $3,923,012, expenses of $1,754,457 and total assets of $30,489,228 at year end.

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