Bank of Montreal

Bank of Montreal in its US$16.3 billion acquisition of Bank of the West


Bank of Montreal


US$16.3 billion


Mergers and Acquisitions

Date Closed

February 2023


Banking and Financial Services

Lead Office



On December 20, 2021, Bank of Montreal announced the signing of a definitive agreement with BNP Paribas to acquire Bank of the West for a cash purchase price of US$16.3 billion. On closing, the acquisition will bring nearly 1.8 million customers to BMO and extends its banking presence in key U.S. growth markets.

Bank of Montreal is a highly diversified financial services provider - the 8th largest bank, by assets, in North America.

Headquartered in San Francisco, Bank of the West has a strong track record of serving retail, small business, commercial and wealth clients.

Osler, Hoskin & Harcourt LLP advised Bank of Montreal on Canadian matters with a team consisting of Jeremy Fraiberg, Andrew MacDougall (Corporate) Patrick Marley, Taylor Cao (Tax) and Elizabeth Sale (Banking & Financial Services).