X0508 4 2026-02-05 0 0001212545 WESTERN ALLIANCE BANCORPORATION WAL 0001379831 Kennedy Barbara ONE E. WASHINGTON ST., SUITE 1400 PHOENIX AZ 85004 0 1 0 0 Chief Human Resources Officer 0 Common Stock 2026-02-05 4 A 0 988 0 A 9741 D Common Stock 22797 I Barbara and Ted Kennedy TTEE Kennedy Family Trust Deferred Stock Units 2026-02-05 4 A 0 988 0 A Common Stock 988 988 D Cash Settled Restricted Stock Units 2026-02-05 4 A 0 2963 A Common Stock 2963 2963 D Represents the grant of Deferred Stock Units under the Issuer's Stock Incentive Plan and credited under the Issuer's Executive Stock and Bonus Deferral Plan and are granted as the deferred portion of the executive officer's annual restricted stock award vesting 50% on the second and third anniversaries of the grant date. Deferred Stock Units are paid in shares of Common Stock issued under the Issuer's Stock Incentive Plan after a separation from service pursuant to the Executive Stock and Bonus Deferral Plan. Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock. These units vest and are payable solely in cash as follows: 1/36th on the 15th day of each month during the 36-month period beginning March 2026 and ending February 2029. /s/Jessica Jarvi (Attorney-in-fact) 2026-02-09