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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 13-3045309

MAMARONECK HISTORICAL SOCIETY

Tax-exempt · MAMARONECK, NY 10543

Financials

$11K$13K2023$97K$131K2024$53K$70K2025
Revenue Expenses · by fiscal year end
Financials of MAMARONECK HISTORICAL SOCIETY by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990$52,911$69,524-$16,613$107,340$0$107,340
December 31, 2024990$96,826$131,333-$34,507$123,953$0$123,953
December 31, 2023990$11,176$12,708-$1,532$158,460$0$158,460
Financial details: 990 for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$51,385
Membership dues
$2,320
Program service revenue
$0
Investment income
$1,526
Other revenue
$0

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$0
Salaries, compensation and benefits (total)
$0
Professional fundraising fees
$0
Program services (functional)
$69,524

Balance sheet and other

Total assets, start of year
$123,953
Total assets, end of year
$107,340
Total liabilities, end of year
$0
Net assets, end of year
$107,340
Net assets without donor restrictions
$107,340
Gross receipts
$52,911
Employees
0
Volunteers
0
Year formed
1976
State of legal domicile
NY

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 for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
John PrittsPresident
Trustee or director
0$0
George MgrditchianExecutive Vice President
Trustee or director
0$0
Donald SutherlandTreasurer
Trustee or director
0$0
Michael TrippicoArchivist
Trustee or director
0$0
Leslie BrillSecretary
Trustee or director
0$0
Phylis KaskelTrustee
Trustee or director
0$0
Anthony DeMeoTrustee
Trustee or director
0$0
Ray MaldonadoTrustee
Trustee or director
0$0
990 for the year ended December 31, 2024: 8 people
NameTitleHours / weekCompensation
Peter FellowsPresident
Trustee or director
0$0
George MgrditchianExecutive Vice President
Trustee or director
0$0
Donald SutherlandTreasurer
Trustee or director
0$0
Michael TrippicoArchivist
Trustee or director
0$0
Phyllis KaskelSecretary
Trustee or director
0$0
Bette PollakTrustee
Trustee or director
0$0
Dennis CucinellaTrustee
Trustee or director
0$0
Ray MaldonadoTrustee
Trustee or director
0$0
990 for the year ended December 31, 2023: 8 people
NameTitleHours / weekCompensation
Peter FellowsPresident
Trustee or director
0$0
George MgrditchianExecutive Vice President
Trustee or director
0$0
Donald SutherlandTreasurer
Trustee or director
0$0
Michael TrippicoArchivist
Trustee or director
0$0
Phyllis KaskelSecretary
Trustee or director
0$0
Bette PollakTrustee
Trustee or director
0$0
Dennis CucinellaTrustee
Trustee or director
0$0
Ray MaldonadoTrustee
Trustee or director
0$0

Address and contacts

Address (IRS master file)
PO BOX 776, MAMARONECK, NY 10543-0776
In care of
% PETER FELLOWS
Mailing address (990-N for 2021)
PO Box 776, Mamaroneck NY 10543
Principal officer (990 for 2025)
John Pritts, 703 PALMER CT APT 1E, MAMARONECK, NY 10543
Principal officer (990-N for 2021)
Donald Sutherland, 622D Larchmont Acres, Larchmont NY 10538
Signed the 990
John Pritts, President
Phone
(914) 381-5787

Mission

To preserve local historical landmarks and public records; to encourage the study of local history...

990 for the year ended December 31, 2025

Program accomplishments

  • Realm design development of a memorial
    Expenses $61,908
  • Dissemination of information and events
    Expenses $647
  • Murals restoration moving supplies installation
    Expenses $1,242
  • Directors Insurance
    Expenses $704
  • P.O. Box at Mamaroneck Post Office
    Expenses $464
  • Room rentals for member events
    Expenses $2,250
  • Supplies
    Expenses $1,618
  • Videography
    Expenses $480
  • Miscellaneous Expenses
    Expenses $211

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. 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 on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024990 on file

File the 2026 990-EZ for MAMARONECK HISTORICAL SOCIETY

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
13-3045309
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1981
Accounting year ends
December
Files
Form 990 or 990-EZ
Assets (IRS master file)
$107,340
Income (IRS master file)
$52,911

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025$52,911$69,524$107,340IRS
990December 2024$96,826$131,333$123,953IRS
990December 2023$11,176$12,708$158,460XML
990December 2022$247,235$129,667$159,992IRS
990-N for 2021
Officer: Donald Sutherland
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Don Sutherland
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Gail Boyle
December 31, 2019≤ $50,000 receipts––e-Postcard

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 13-3045309).

Questions about MAMARONECK HISTORICAL SOCIETY

What is the EIN of MAMARONECK HISTORICAL SOCIETY?
The employer identification number (EIN) of MAMARONECK HISTORICAL SOCIETY is 13-3045309.
Is MAMARONECK HISTORICAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1981.
Are donations to MAMARONECK HISTORICAL SOCIETY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MAMARONECK HISTORICAL SOCIETY file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of MAMARONECK HISTORICAL SOCIETY 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 MAMARONECK HISTORICAL SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2025.
Who is the principal officer of MAMARONECK HISTORICAL SOCIETY?
The 990 for the year ended December 31, 2025 names John Pritts.
Who are the officers and directors of MAMARONECK HISTORICAL SOCIETY?
The 990 for the year ended December 31, 2025 lists 8 people; 0 received compensation from the organization.
How much revenue does MAMARONECK HISTORICAL SOCIETY have?
On its 990 for the year ended December 31, 2025 it reported revenue of $52,911, expenses of $69,524 and total assets of $107,340 at year end.

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