Who is the parent company of Western Alliance Bank?

AMERICAN FNB 7 AVAILA Bank 9 Beach Cities Commercial Bank 2 CFG Bank 15 Citizens National Bank of Quitman 1 Cowboy Bank of Texas 11 DEERWOOD Bank 8 EVOLVE B&TC 14 Exchange State Bank 3 FIRST COMMONWEALTH Bank 16 Horizon Bank 6 JOURNEY Bank 10 Luminate Bank 14 OCONEE State Bank 5 Old Exchange National Bank 20 State Bank of St. Jacob 10 VERSABANK USA National Association 9 Washington State Bank 4 West Central Georgia Bank 12 York State Bank 2