Bank Cornerstone Bank
Cornerstone Bank is a federally insured bank based in Spencer, Massachusetts.
- Type
- Bank
- Charter
- State-chartered commercial bank, Federal Reserve member
- Primary regulator
- FED
- Established
- April 5, 1871
- Headquarters
- Spencer, MA
- FDIC certificate #
- 90282
- Fed RSSD ID
- 447100
- Holding company
- Peoplesbancorp Mhc
- Website
- www.cornerstonebank.com
Source: U.S. FDIC BankFind & NCUA 5300 Call Report (public data). Data sources · Data as of Q1 2026
Branches by state
Cornerstone Bank operates 17 branch locations in Massachusetts. Select a state to drill down to its towns and individual branches.
Ownership
Cornerstone Bank is owned by Peoplesbancorp Mhc, which also owns 1 other institution. See the full ownership & merger history.
Cornerstone Bank financial summary
Other banks in Massachusetts
Federally insured banks headquartered in Massachusetts, by total assets.
- State Street Bank and Trust Company $386.55B
- Eastern Bank $30.62B
- Rockland Trust Company $24.79B
- Beacon Bank and Trust $22.18B
- Salem Five Cents Savings Bank $8.57B
- Needham Bank $7.17B
- Cambridge Savings Bank $6.91B
- Middlesex Savings Bank $6.15B
Similar-size banks
Institutions close to Cornerstone Bank’s $2.4B in assets.
Also owned by Peoplesbancorp Mhc
- PeoplesBank $4.63B