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Nonprofit · EIN 57-1179990

KNOPF FAMILY FOUNDATION INC

Tax-exempt · WAKEFIELD, MA 01880

Financials

$9.2M$2.8M2023$18.4M$3.7M2024$7.8M$4.2M2025
Revenue Expenses · by fiscal year end
Financials of KNOPF FAMILY FOUNDATION INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-PF$7,803,268$4,242,891$3,560,377$61,885,091$0$61,885,091
December 31, 2024990-PF$18,372,463$3,749,266$14,623,197$58,324,714$0$58,324,714
December 31, 2023990-PF$9,158,878$2,832,681$6,326,197$43,701,517$0$43,701,517
Financial details: 990-PF for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$5,595,135
Dividends
$714,655
Interest
$67,600
Net gain from sales of assets
$1,425,878

Expenses

Grants and similar amounts paid
$3,900,500
Compensation of officers, directors and key employees
$0
Disbursements for charitable purposes
$3,900,500
Excise tax on investment income
$30,363

Balance sheet and other

Total assets, start of year
$58,324,714
Total assets, end of year
$61,885,091
Total liabilities, end of year
$0
Net assets, end of year
$61,885,091
Fair market value of assets
$79,569,833
Qualifying distributions
$3,900,500
Net investment income
$2,208,133

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
CHARLES E KNOPF JR
6680 SE HARBOR CIRCLE, STUART, FL 34996
TRUSTEE0$0
JEFFREY P MANNING
90 BAYSTATE RD, WAKEFIELD, MA 01880
TRUSTEE0$0
KRISTOPHER W KNOPF
6699 IMPERIAL WOODS RD, JUPITER, FL 33458
TRUSTEE0$0
JOSEPH ROBERT
90 BAYSTATE RD, WAKEFIELD, MA 01880
TRUSTEE0$0
990-PF for the year ended December 31, 2024: 4 people
NameTitleHours / weekCompensation
CHARLES E KNOPF JR
6680 SE HARBOR CIRCLE, STUART, FL 34996
TRUSTEE0$0
JEFFREY P MANNING
90 BAYSTATE RD, WAKEFIELD, MA 01880
TRUSTEE0$0
KRISTOPHER W KNOPF
6699 IMPERIAL WOODS RD, JUPITER, FL 33458
TRUSTEE0$0
JOSEPH ROBERT
90 BAYSTATE RD, WAKEFIELD, MA 01880
TRUSTEE0$0
990-PF for the year ended December 31, 2023: 3 people
NameTitleHours / weekCompensation
CHARLES E KNOPF JR
6680 SE HARBOR CIRCLE, STUART, FL 34996
TRUSTEE0$0
JEFFREY P MANNING
90 BAYSTATE RD, WAKEFIELD, MA 01880
TRUSTEE0$0
KRISTOPHER W KNOPF
6699 IMPERIAL WOODS RD, JUPITER, FL 33458
TRUSTEE0$0

Address and contacts

Address (IRS master file)
90 BAY STATE RD, WAKEFIELD, MA 01880-1047
In care of
% POWER PRODUCTS SYSTEMS
Signed the 990-PF
JEFFREY MANNING, TRUSTEE
Phone
(781) 287-7213
Return prepared by
DOWNEY & COMPANY LLP

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
57-1179990
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)
$61,885,091
Income (IRS master file)
$10,640,677

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2025$7,803,268$4,242,891$61,885,091IRS
990-PFDecember 2024$18,372,463$3,749,266$58,324,714IRS
990-PFDecember 2023$9,158,878$2,832,681$43,701,517XML
990-PFDecember 2022–––IRS
990-PFDecember 2021–––IRS
990-PFDecember 2020–––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 57-1179990).

Questions about KNOPF FAMILY FOUNDATION INC

What is the EIN of KNOPF FAMILY FOUNDATION INC?
The employer identification number (EIN) of KNOPF FAMILY FOUNDATION INC is 57-1179990.
Is KNOPF FAMILY FOUNDATION INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2004.
Are donations to KNOPF FAMILY FOUNDATION INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does KNOPF FAMILY FOUNDATION INC file?
Form 990-PF. Private foundations file every year.
When is the next return of KNOPF FAMILY FOUNDATION INC 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 KNOPF FAMILY FOUNDATION INC 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 KNOPF FAMILY FOUNDATION INC?
The 990-PF for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
How much revenue does KNOPF FAMILY FOUNDATION INC have?
On its 990-PF for the year ended December 31, 2025 it reported revenue of $7,803,268, expenses of $4,242,891 and total assets of $61,885,091 at year end.

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