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Nonprofit · EIN 13-3523504

MAX & RIKA KNOPF FOUNDATION

Tax-exempt · MIAMI BEACH, FL 33140

Financials

$456K$264K2022$475K$177K2023$805K$186K2024
Revenue Expenses · by fiscal year end
Financials of MAX & RIKA KNOPF FOUNDATION by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
November 30, 2025990-PF$805,053$186,106$618,947$4,234,096$0$4,234,096
November 30, 2024990-PF$474,831$177,160$297,671$3,615,149$0$3,615,149
November 30, 2023990-PF$455,544$264,177$191,367$3,317,478$0$3,317,478
Financial details: 990-PF for the year ended November 30, 2025

Revenue

Contributions, gifts and grants
$566,400
Dividends
$51,210
Interest
$48,097
Net rental income
$17,163
Net gain from sales of assets
$110,546

Expenses

Grants and similar amounts paid
$170,469
Disbursements for charitable purposes
$173,219
Excise tax on investment income
$3,156

Balance sheet and other

Total assets, start of year
$3,615,149
Total assets, end of year
$4,234,096
Total liabilities, end of year
$0
Net assets, end of year
$4,234,096
Fair market value of assets
$4,881,215
Qualifying distributions
$173,219
Net investment income
$238,653

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 November 30, 2025, highest compensation first.

NameTitleHours / weekCompensation
SOLOMON KNOPF
951 WEST KENNEDY BLVD, LAKEWOOD, NJ 08701
MANAGER5$0
RIKA KNOPF
4 WALLENBERG CIRCLE, MONSEY, NY 10952
MANAGER5$0
990-PF for the year ended November 30, 2024: 2 people
NameTitleHours / weekCompensation
SOLOMON KNOPF
951 WEST KENNEDY BLVD, LAKEWOOD, NJ 08701
MANAGER5$0
RIKA KNOPF
3535 INDIAN CREEK DR 204, MIAMI BEACH, FL 33140
MANAGER5$0
990-PF for the year ended November 30, 2023: 2 people
NameTitleHours / weekCompensation
SOLOMON KNOPF
951 WEST KENNEDY BLVD, LAKEWOOD, NJ 08701
MANAGER5$0
RIKA KNOPF
3535 INDIAN CREEK DR 204, MIAMI BEACH, FL 33140
MANAGER5$0

Address and contacts

Address (IRS master file)
3535 INDIAN CREEK DR APT 204, MIAMI BEACH, FL 33140-4037
Signed the 990-PF
SOLOMON KNOPF, MANAGER
Phone
(212) 962-6100
Return prepared by
WASSER BRETTLER KLAR & LIPSTEIN 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 November, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2024November 30, 2025April 15, 2026990-PF on file
2023November 30, 2024April 15, 2025990-PF on file
2022November 30, 2023April 15, 2024990-PF on file

IRS record

EIN
13-3523504
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
1989
Accounting year ends
November
Files
Form 990-PF
Assets (IRS master file)
$4,234,096
Income (IRS master file)
$805,053

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFNovember 2025$805,053$186,106$4,234,096XML
990-PFNovember 2024$474,831$177,160$3,615,149XML
990-PFNovember 2023$455,544$264,177$3,317,478XML
990-PFNovember 2022–––IRS
990-PFNovember 2021–––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 13-3523504).

Questions about MAX & RIKA KNOPF FOUNDATION

What is the EIN of MAX & RIKA KNOPF FOUNDATION?
The employer identification number (EIN) of MAX & RIKA KNOPF FOUNDATION is 13-3523504.
Is MAX & RIKA KNOPF FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1989.
Are donations to MAX & RIKA KNOPF FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does MAX & RIKA KNOPF FOUNDATION file?
Form 990-PF. Private foundations file every year.
When is the next return of MAX & RIKA KNOPF FOUNDATION due?
The return for tax year 2025 (the year ending November 30, 2026) is due April 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MAX & RIKA KNOPF FOUNDATION last file with the IRS?
The latest return in the IRS public files is the 990-PF for the year ended November 2025.
Who are the officers and directors of MAX & RIKA KNOPF FOUNDATION?
The 990-PF for the year ended November 30, 2025 lists 2 people; 0 received compensation from the organization.
How much revenue does MAX & RIKA KNOPF FOUNDATION have?
On its 990-PF for the year ended November 30, 2025 it reported revenue of $805,053, expenses of $186,106 and total assets of $4,234,096 at year end.

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