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Nonprofit · EIN 02-0245312

PROPRIETORS PORTSMOUTH ATHENAEUM

Tax-exempt · PORTSMOUTH, NH 03802

Financials

$614K$568K2023$621K$553K2024$762K$631K2025
Revenue Expenses · by fiscal year end
Financials of PROPRIETORS PORTSMOUTH ATHENAEUM by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990$762,070$631,461$130,609$4,205,947$117,574$4,088,373
December 31, 2024990$620,596$553,268$67,328$4,011,191$129,983$3,881,208
December 31, 2023990$613,999$568,285$45,714$3,812,632$156,917$3,655,715
Financial details: 990 for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$397,633
Membership dues
$129,943
Program service revenue
$0
Investment income
$238,524
Net rental income
$109,109
Net gain from sales of assets
$125,424
Net income from fundraising events
$11,903
Net income from sales of inventory
$3,350
Other revenue
$125,913

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$111,901
Other salaries and wages
$154,375
Salaries, compensation and benefits (total)
$308,214
Professional fundraising fees
$0
Accounting fees
$5,580
Occupancy
$64,971
Depreciation
$59,115
Program services (functional)
$419,244
Management and general (functional)
$147,535
Fundraising (functional)
$64,682

Balance sheet and other

Total assets, start of year
$4,011,191
Total assets, end of year
$4,205,947
Total liabilities, end of year
$117,574
Net assets, end of year
$4,088,373
Land, buildings and equipment
$1,066,694
Publicly traded securities
$2,483,873
Net assets without donor restrictions
$4,000,797
Net assets with donor restrictions
$87,576
Gross receipts
$1,369,426
Employees
10
Volunteers
80
Year formed
1817
State of legal domicile
NH

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
THOMAS HARDIMAN JRKEEPER
Officer
40$111,900
WILLIAM TRUSLOWDIRECTOR
Trustee or director
2$0
ALAN GOLDDIRECTOR
Trustee or director
2$0
ANN BEATTIEDIRECTOR
Trustee or director
2$0
ANNE WEIDMANDIRECTOR
Trustee or director
2$0
CHRISTINE FRIESEDIRECTOR
Trustee or director
2$0
CRAIG STEIDLETREASURER
Trustee or director
3$0
CURTIS SPRINGERDIRECTOR
Trustee or director
2$0
DONALD S MARGESONDIRECTOR
Trustee or director
2$0
JANET DINANVICE PRESIDENT
Trustee or director
2$0
JEFFREY KEEFEPRESIDENT
Trustee or director
4$0
MARGARET HODGESSECRETARY
Trustee or director
4$0
MICHAEL LABRIEDIRECTOR
Trustee or director
2$0
SALLY GAYERPAST PRESIDENT
Trustee or director
1$0
SUSAN LASSENDIRECTOR
Trustee or director
2$0
990 for the year ended December 31, 2024: 15 people
NameTitleHours / weekCompensationOther / benefits
THOMAS HARDIMAN JRKEEPER
Officer
40$91,588$15,915
ELIZABETH FARISHDIRECTOR
Trustee or director
2$0$0
MARGARET HODGESSECRETARY
Trustee or director
4$0$0
JANET DINANVICE PRESIDENT
Trustee or director
2$0$0
CHRISTINE FRIESEDIRECTOR
Trustee or director
2$0$0
SALLY GAYERPAST PRESIDENT
Trustee or director
1$0$0
ALAN GOLDDIRECTOR
Trustee or director
2$0$0
ANNE WEIDMANDIRECTOR
Trustee or director
2$0$0
DONALD S MARGESONDIRECTOR
Trustee or director
2$0$0
SUSAN LASSENDIRECTOR
Trustee or director
2$0$0
CURTIS SPRINGERDIRECTOR
Trustee or director
2$0$0
CRAIG STEIDLETREASURER
Trustee or director
3$0$0
ANN BEATTIEDIRECTOR
Trustee or director
2$0$0
MICHAEL LABRIEDIRECTOR
Trustee or director
2$0$0
JEFFREY KEEFEPRESIDENT
Trustee or director
4$0$0
990 for the year ended December 31, 2023: 15 people
NameTitleHours / weekCompensationOther / benefits
THOMAS HARDIMAN JRKEEPER
Officer
40$88,920$14,197
BRADLEY LOWNPAST PRESIDENT
Trustee or director
1$0$0
MARGARET HODGESVICE PRESIDENT
Trustee or director
2$0$0
RICHARD ADAMSSECRETARY
Trustee or director
4$0$0
CHRISTINE FRIESEDIRECTOR
Trustee or director
2$0$0
SALLY GAYERPRESIDENT
Trustee or director
5$0$0
ALAN GOLDDIRECTOR
Trustee or director
2$0$0
ANNE WEIDMANDIRECTOR
Trustee or director
2$0$0
DONALD S MARGESONDIRECTOR
Trustee or director
2$0$0
SUSAN LASSENDIRECTOR
Trustee or director
2$0$0
CURTIS SPRINGERDIRECTOR
Trustee or director
2$0$0
CRAIG STEIDLEDIRECTOR
Trustee or director
2$0$0
ANN BEATTIEDIRECTOR
Trustee or director
2$0$0
PETER RICEDIRECTOR
Trustee or director
2$0$0
JEFFREY KEEFETREASURER
Trustee or director
4$0$0

Address and contacts

Address (IRS master file)
PO BOX 366, PORTSMOUTH, NH 03802-0366
Principal officer (990 for 2025)
CRAIG STEIDLE, 9 MARKET SQUARE PO BOX 366, PORTSMOUTH, NH 03802
Signed the 990
CRAIG STEIDLE, TREASURER
Phone
(603) 431-2538
Return prepared by
CUMMINGS LAMONT & MCNAMEE PA

Mission

THE PORTSMOUTH ATHENAEUM IS A MEMBERSHIP LIBRARY THAT WELCOMES ALL WHO SEEK KNOWLEDGE TO EXPERIENCE CULTURE AND SHARE IN THE HISTORY OF THE PISCATAQUA REGION SO THAT TOGETHER WE MAY FIND MEANING IN THE PAST TO ILLUMINATE THE PRESENT AND THE FUTURE.

990 for the year ended December 31, 2025

Program accomplishments

  • 2025 WAS ANOTHER YEAR OF RECORD GROWTH AND ACTIVITY FOR THE ATHENAEUM, WHICH NOW HAS MORE THAN 600 ACTIVE MEMBERS. 2025 STATISTICS: 2,972 IN-PERSON VISITS; 291 TELEPHONE QUERIES; 404 EMAIL QUERIES; 480 LECTURE ATTENDANTS; 450 CONCERT ATTENDANTS; 371 SOCIAL EVENT ATTENDANTS.CONTINUED ON SCHEDULE O
    Expenses $419,244 · revenue $3,350

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

IRS record

EIN
02-0245312
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
1958
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Education (B76Z)
Assets (IRS master file)
$4,205,947
Income (IRS master file)
$1,369,426

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025$762,070$631,461$4,205,947XML
990December 2024$620,596$553,268$4,011,191IRS
990December 2023$613,999$568,285$3,812,632XML
990December 2022$509,565$475,355$3,528,272IRS
990December 2021–––IRS
990December 2020–––IRS
990December 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 02-0245312).

Questions about PROPRIETORS PORTSMOUTH ATHENAEUM

What is the EIN of PROPRIETORS PORTSMOUTH ATHENAEUM?
The employer identification number (EIN) of PROPRIETORS PORTSMOUTH ATHENAEUM is 02-0245312.
Is PROPRIETORS PORTSMOUTH ATHENAEUM tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1958.
Are donations to PROPRIETORS PORTSMOUTH ATHENAEUM tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does PROPRIETORS PORTSMOUTH ATHENAEUM 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 PROPRIETORS PORTSMOUTH ATHENAEUM 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 PROPRIETORS PORTSMOUTH ATHENAEUM 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 PROPRIETORS PORTSMOUTH ATHENAEUM?
The 990 for the year ended December 31, 2025 names CRAIG STEIDLE.
Who are the officers and directors of PROPRIETORS PORTSMOUTH ATHENAEUM?
The 990 for the year ended December 31, 2025 lists 15 people; 1 received compensation from the organization, the highest $111,900 (THOMAS HARDIMAN JR, KEEPER).
How much revenue does PROPRIETORS PORTSMOUTH ATHENAEUM have?
On its 990 for the year ended December 31, 2025 it reported revenue of $762,070, expenses of $631,461 and total assets of $4,205,947 at year end.

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