Western Alliance Bancorporation is a regional bank holding company headquartered in Phoenix.

[2] The bank was founded in 1994 in Las Vegas, Nevada.

[5] In October 2012, it acquired Western Liberty Bancorp for $55 million.

[6] In April 2021, the company acquired AmeriHome for $1.22 billion.

[7] During the 2023 United States banking crisis, the company's share price fell due its exposure to the technology sector and its amount of uninsured deposits; however, the share price rallied to new highs quickly.