WAL

SEC source: 0001628280-25-057377 · wk-form4_1765919629.xml · nonDerivative · entry 5

JOHNSON MARIANNE BOYD · CIK 0001186742 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Marianne Boyd Johnson Subtrust of the Boyd 2005 Irrevocable Trust dated April 14, 2005

Disclosed balance after: 0

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.64 to $88.50, inclusive.

SEC source: 0001628280-25-057377 · wk-form4_1765919629.xml · nonDerivative · entry 4

JOHNSON MARIANNE BOYD · CIK 0001186742 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Marianne Boyd Johnson Subtrust of the Boyd 2005 Irrevocable Trust dated April 14, 2005

Disclosed balance after: 5,386

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.53 to $87.36, inclusive.

SEC source: 0001628280-25-057377 · wk-form4_1765919629.xml · nonDerivative · entry 3

JOHNSON MARIANNE BOYD · CIK 0001186742 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Samuel J. Boyd Subtrust of the Boyd 2005 Irrevocable Trust dated April 14, 2005

Disclosed balance after: 0

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.53 to $87.36, inclusive.

SEC source: 0001628280-25-057377 · wk-form4_1765919629.xml · nonDerivative · entry 2

JOHNSON MARIANNE BOYD · CIK 0001186742 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · William R. Boyd Subtrust of The Boyd 2005 Irrevocable Trust dated April 15, 2005

Disclosed balance after: 0

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.53 to $87.36, inclusive.

SEC source: 0001628280-25-057377 · wk-form4_1765919629.xml · nonDerivative · entry 1

JOHNSON MARIANNE BOYD · CIK 0001186742 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · William R. Boyd Subtrust of The Boyd 2005 Irrevocable Trust dated April 15, 2005

Disclosed balance after: 6,614

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.48 to $86.52, inclusive. The reporting person undertakes to provide to Western Alliance Bancorporation, any security holder of Western Alliance Bancorporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (2), and (3) to this Form 4.

SEC source: 0001628280-25-057380 · wk-form4_1765919653.xml · derivative · entry 8

Vecchione Kenneth · CIK 0001398948 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,356

Underlying: Common Stock · 437 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057380 · wk-form4_1765919653.xml · derivative · entry 7

Vecchione Kenneth · CIK 0001398948 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,558

Underlying: Common Stock · 539 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057380 · wk-form4_1765919653.xml · nonDerivative · entry 4

Vecchione Kenneth · CIK 0001398948 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 447,611

SEC source: 0001628280-25-057380 · wk-form4_1765919653.xml · nonDerivative · entry 3

Vecchione Kenneth · CIK 0001398948 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448,048

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057380 · wk-form4_1765919653.xml · nonDerivative · entry 2

Vecchione Kenneth · CIK 0001398948 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 447,611

SEC source: 0001628280-25-057380 · wk-form4_1765919653.xml · nonDerivative · entry 1

Vecchione Kenneth · CIK 0001398948 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448,150

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057378 · wk-form4_1765919635.xml · derivative · entry 7

Jarvi Jessica H · CIK 0001981756 · CLO & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,195

Underlying: Common Stock · 46 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057378 · wk-form4_1765919635.xml · derivative · entry 6

Jarvi Jessica H · CIK 0001981756 · CLO & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 795

Underlying: Common Stock · 58 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057378 · wk-form4_1765919635.xml · nonDerivative · entry 4

Jarvi Jessica H · CIK 0001981756 · CLO & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,457

SEC source: 0001628280-25-057378 · wk-form4_1765919635.xml · nonDerivative · entry 3

Jarvi Jessica H · CIK 0001981756 · CLO & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,503

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057378 · wk-form4_1765919635.xml · nonDerivative · entry 2

Jarvi Jessica H · CIK 0001981756 · CLO & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,457

SEC source: 0001628280-25-057378 · wk-form4_1765919635.xml · nonDerivative · entry 1

Jarvi Jessica H · CIK 0001981756 · CLO & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,515

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057370 · wk-form4_1765919604.xml · derivative · entry 6

Nachlas Emily · CIK 0001946843 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,373

Underlying: Common Stock · 53 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057370 · wk-form4_1765919604.xml · derivative · entry 5

Nachlas Emily · CIK 0001946843 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,005

Underlying: Common Stock · 72 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057370 · wk-form4_1765919604.xml · nonDerivative · entry 4

Nachlas Emily · CIK 0001946843 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,671

SEC source: 0001628280-25-057370 · wk-form4_1765919604.xml · nonDerivative · entry 3

Nachlas Emily · CIK 0001946843 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,724

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057370 · wk-form4_1765919604.xml · nonDerivative · entry 2

Nachlas Emily · CIK 0001946843 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,671

SEC source: 0001628280-25-057370 · wk-form4_1765919604.xml · nonDerivative · entry 1

Nachlas Emily · CIK 0001946843 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,743

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057366 · wk-form4_1765919592.xml · derivative · entry 7

Boothe Timothy W · CIK 0001364140 · Chief Administration Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,793

Underlying: Common Stock · 69 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057366 · wk-form4_1765919592.xml · derivative · entry 6

Boothe Timothy W · CIK 0001364140 · Chief Administration Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,361

Underlying: Common Stock · 97 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057366 · wk-form4_1765919592.xml · nonDerivative · entry 4

Boothe Timothy W · CIK 0001364140 · Chief Administration Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,202

SEC source: 0001628280-25-057366 · wk-form4_1765919592.xml · nonDerivative · entry 3

Boothe Timothy W · CIK 0001364140 · Chief Administration Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,271

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057366 · wk-form4_1765919592.xml · nonDerivative · entry 2

Boothe Timothy W · CIK 0001364140 · Chief Administration Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,202

SEC source: 0001628280-25-057366 · wk-form4_1765919592.xml · nonDerivative · entry 1

Boothe Timothy W · CIK 0001364140 · Chief Administration Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,299

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057365 · wk-form4_1765919585.xml · derivative · entry 7

Kennedy Barbara · CIK 0001379831 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,909

Underlying: Common Stock · 74 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057365 · wk-form4_1765919585.xml · derivative · entry 6

Kennedy Barbara · CIK 0001379831 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,402

Underlying: Common Stock · 101 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057365 · wk-form4_1765919585.xml · nonDerivative · entry 4

Kennedy Barbara · CIK 0001379831 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,753

SEC source: 0001628280-25-057365 · wk-form4_1765919585.xml · nonDerivative · entry 3

Kennedy Barbara · CIK 0001379831 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,827

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057365 · wk-form4_1765919585.xml · nonDerivative · entry 2

Kennedy Barbara · CIK 0001379831 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,753

SEC source: 0001628280-25-057365 · wk-form4_1765919585.xml · nonDerivative · entry 1

Kennedy Barbara · CIK 0001379831 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,854

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057364 · wk-form4_1765919578.xml · derivative · entry 6

Bruckner Tim R · CIK 0001771957 · CBO for Regional Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,988

Underlying: Common Stock · 115 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057364 · wk-form4_1765919578.xml · derivative · entry 5

Bruckner Tim R · CIK 0001771957 · CBO for Regional Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,219

Underlying: Common Stock · 158 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057364 · wk-form4_1765919578.xml · nonDerivative · entry 4

Bruckner Tim R · CIK 0001771957 · CBO for Regional Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,759

SEC source: 0001628280-25-057364 · wk-form4_1765919578.xml · nonDerivative · entry 3

Bruckner Tim R · CIK 0001771957 · CBO for Regional Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,874

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057364 · wk-form4_1765919578.xml · nonDerivative · entry 2

Bruckner Tim R · CIK 0001771957 · CBO for Regional Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,759

SEC source: 0001628280-25-057364 · wk-form4_1765919578.xml · nonDerivative · entry 1

Bruckner Tim R · CIK 0001771957 · CBO for Regional Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,917

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057362 · wk-form4_1765919570.xml · derivative · entry 7

GIBBONS DALE · CIK 0001331626 · Vice Chairman and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,495

Underlying: Common Stock · 212 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-057362 · wk-form4_1765919570.xml · derivative · entry 6

GIBBONS DALE · CIK 0001331626 · Vice Chairman and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,982

Underlying: Common Stock · 285 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.

SEC source: 0001628280-25-057362 · wk-form4_1765919570.xml · nonDerivative · entry 4

GIBBONS DALE · CIK 0001331626 · Vice Chairman and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,358

SEC source: 0001628280-25-057362 · wk-form4_1765919570.xml · nonDerivative · entry 3

GIBBONS DALE · CIK 0001331626 · Vice Chairman and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,570

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: 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 2025 and ending February 2028.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-057362 · wk-form4_1765919570.xml · nonDerivative · entry 2

GIBBONS DALE · CIK 0001331626 · Vice Chairman and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,358

SEC source: 0001628280-25-057362 · wk-form4_1765919570.xml · nonDerivative · entry 1

GIBBONS DALE · CIK 0001331626 · Vice Chairman and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,643

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: 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 2024 and ending February 2027.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

SEC source: 0001628280-25-054130 · wk-form4_1764187512.xml · nonDerivative · entry 1

SNYDER DONALD D · CIK 0001186752 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,083

SEC source: 0001628280-25-052892 · wk-form4_1763500590.xml · derivative · entry 6

Herndon Lynne · CIK 0002007542 · Chief Credit Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 596

Underlying: Common Stock · 22 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F3 · derivative.exercise_date: 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 2025 and ending February 2028.

F3 · derivative.expiration_date: 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 2025 and ending February 2028.

SEC source: 0001628280-25-052892 · wk-form4_1763500590.xml · derivative · entry 5

Herndon Lynne · CIK 0002007542 · Chief Credit Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 507

Underlying: Common Stock · 35 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F2 · price: Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

F1 · derivative.exercise_date: 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 2024 and ending February 2027.

F1 · derivative.expiration_date: 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 2024 and ending February 2027.