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US nonprofit · EIN 237131696 · Southborough, MAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 237131696) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 30 April 2025: assets, liabilities, staff, website, telephone, pay.Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Principal officer IRS Form 990-N (e-Postcard) - principal officer named for tax year 2021.Exemption status IRS Automatic Revocation of Exemption List (posted to 13 October 2026).Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Southborough Historical Society Inc

Donations deductible
Revenue
$13k
year to 30 April 2025
Expenses
$40k
year to 30 April 2025
Total assets
$2.3m
$321k liabilities
Net assets
$2m
assets less liabilities
Directors and trustees
4
1.4 years on average
Staff
0
3 volunteers
Left since last filing
0
no seats appear to have opened
Officers and senior staff
4
named in Part VII
Exemption recognised again: the IRS automatically revoked this organisation’s exemption on 15 September 2013, and its IRS ruling date is now 1 January 2015 (a later recognition). Source: IRS Automatic Revocation of Exemption List, posted to 13 October 2026.
How am I connected?

Southborough Historical Society Inc's network

4 people1 organisationi4 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (4). Violet dotted lines (1) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

4 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 6 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Amy RosenbergClerk2025
1 yr
Jon Delli PriscoliBoard Member2025
1 yr
Michael WeishanPresident and Treasuer2025
1 yr
Rebecca Deans RoweBoard Member2025
1 yr
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

4 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Dean LamsaCompany secretary2023
Mathew YoungBoard Member2025
Michael WeishanPresident and Treasurer2023
Sally WatersVice President2023

Pay and hours

year to 30 April 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Michael WeishanPresident and Treasuer15$0
Rebecca Deans RoweBoard Member2$0
Amy RosenbergClerk3$0
Mathew YoungBoard Member1$0
Jon Delli PriscoliBoard Member1$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Southborough Historical Society Inc
EIN
237131696
Address
25 Common St, Southborough, MA, 01772-1691
State
Massachusetts
Mission
Study, collect, preserve, and house historical records (as filed on the Form 990)
Activity (NTEE)
A80 Arts, culture and humanities
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Arts, Culture & Humanities
Size band
6 (IRS master file code)
Formed
1965
Principal officer
Michael D Weishan (as named on the Form 990)
IRS ruling date
1 January 2015
Status
Code 01 (unconditional exemption)
Form 990 filings on record
2, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥1years on the filingsAmy Rosenberg
≥1years on the filingsJon Delli Priscoli
≥1years on the filingsMichael Weishan
≥1years on the filingsRebecca Deans Rowe

Latest return

year to 30 April 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 April 2025. US dollars, as filed.
Total assets
$2.3m
Total liabilities
$321k
Net assets or fund balances
$2m
Contributions and grants received
$13k
Program service revenue
$0
Employees
0
Volunteers
3

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$13k$40kDeficit $27k

As filed on the IRS Form 990. US dollars.