X0508 4 2026-01-15 0 0001212545 WESTERN ALLIANCE BANCORPORATION WAL 0001599796 JAMMET MARY CHRIS 1 E. WASHINGTON STREET SUITE 1400 PHOENIX AZ 85004 1 0 0 0 0 Deferred Stock Units 2026-01-15 4 A 0 251 89.83 A Common Stock 251 251 D Represents Deferred Stock Units credited under the Issuer's Director Deferral Plan in lieu of cash compensation otherwise payable on the transaction date. Deferred Stock Units are paid in shares of Common Stock Issued under the Issuer's Stock Incentive Plan after separation from service, with cash for any fractional units. Represents the closing price of the Issuer's Common Stock on the transaction date which was used to determine the number of Deferred Stock Units acquired on that date. /s/Jessica Jarvi (Attorney-in-fact) 2026-01-20