Customer data was hacked at CIBC-owned Simplii and the Bank of Montreal, affecting tens of thousands of people.

Is BMO and CIBC the same?

Big Five is the name colloquially given to the five largest banks that dominate the banking industry of Canada: Bank of Montreal (BMO), Bank of Nova Scotia (Scotiabank), Canadian Imperial Bank of Commerce (CIBC), Royal Bank of Canada (RBC), and Toronto-Dominion Bank (TD).

Has Bank of Montreal Been Hacked?

In late May, BMO and CIBC-owned Simplii Financial warned that hackers had accessed the personal and account information of about 90,000 customers. ... BMO officials told Zinck the breach happened after hackers accessed his online banking information.