Ben Mucha - 13 Feb 2026 Form 4 Insider Report for WESTERN ALLIANCE BANCORPORATION (WAL)

Role: Chief Accounting Officer
Signature: /s/Jessica Jarvi (Attorney-in-fact)
Issuer symbol: WAL
Transactions as of: 13 Feb 2026
Net transactions value: -$91,023
Form type: 4
Filing time: 18 Feb 2026, 16:36:15 UTC
Previous filing: 12 Mar 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Mucha Ben	Chief Accounting Officer	1 E. WASHINGTON STREET, SUITE 1400, PHOENIX	/s/Jessica Jarvi (Attorney-in-fact)	18 Feb 2026	0002060190

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WAL	Common Stock	Award	$0	+1,092	+9.4%	$0.000000	12,687	13 Feb 2026	Direct
transaction	WAL	Common Stock	Tax liability	$29,731	-319	-2.5%	$93.20	12,368	15 Feb 2026	Direct
transaction	WAL	Common Stock	Sale	$61,292	-641	-5.2%	$95.62	11,727	18 Feb 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.58 to $95.64, 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 this range.

Content

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.58 to $95.64, 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 this range.