Western Alliance (NYSE: WAL) accounting chief reports tax share withholding

Rhea-AI Filing Summary

WESTERN ALLIANCE BANCORPORATION Chief Accounting Officer Ben Mucha reported a routine tax-related share disposition. On May 4, 2026, 2,296 shares of common stock were withheld at $79.85 per share to satisfy tax obligations, coded as a tax-withholding disposition rather than an open-market sale. Following this transaction, he directly holds 9,431 common shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mucha Ben

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	2,296	$79.85	$183K

Holdings After Transaction: Common Stock — 9,431 shares (Direct, null)

Footnotes (1)

Key Figures

Shares withheld for taxes: 2,296 shares Tax withholding price: $79.85 per share Shares owned after transaction: 9,431 shares

3 metrics

Shares withheld for taxes 2,296 shares Tax-withholding disposition on May 4, 2026

Tax withholding price $79.85 per share Value used for tax-withholding shares

Shares owned after transaction 9,431 shares Direct common stock holdings after May 4, 2026 transaction

Key Terms

Common Stock, tax-withholding disposition, Chief Accounting Officer, Form 4

4 terms

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Chief Accounting Officer financial

"officer_title: "Chief Accounting Officer""

A chief accounting officer is a senior executive responsible for overseeing a company's financial records and ensuring all accounting practices are accurate and compliant with regulations. They play a key role in preparing financial reports that help investors understand the company's financial health, much like a trusted navigator guiding a ship through complex waters. Their work ensures transparency and trust in the company's financial information.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mucha Ben

(Last) (First) (Middle)

1 E. WASHINGTON STREET

SUITE 1400

(Street)

PHOENIX ARIZONA 85004

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
WESTERN ALLIANCE BANCORPORATION [ WAL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/04/2026		F		2,296	D	$79.85	9,431	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/Jessica Jarvi (Attorney-in-fact)	05/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Ben Mucha report at WESTERN ALLIANCE BANCORPORATION (WAL)?

Ben Mucha reported a tax-related share disposition, not an open-market trade. On May 4, 2026, 2,296 common shares were withheld to cover tax liabilities from equity compensation, as reflected in a Form 4 filing with the SEC.

How many WESTERN ALLIANCE (WAL) shares were withheld and at what price?

The filing shows 2,296 common shares withheld at $79.85 per share. This reflects shares delivered back to the issuer to satisfy tax obligations tied to equity compensation, rather than a discretionary sale into the open market.

Is Ben Mucha’s Form 4 for WAL an open-market sale of shares?

No, the Form 4 describes a tax-withholding disposition coded “F,” not an open-market sale. Shares were used to pay tax liabilities associated with equity awards, a common administrative transaction that does not represent a voluntary sale decision.

How many WESTERN ALLIANCE (WAL) shares does Ben Mucha hold after this transaction?

After the tax-withholding disposition, Ben Mucha directly holds 9,431 common shares. This post-transaction ownership figure reflects his remaining stake following the delivery of 2,296 shares to cover related tax obligations.

What is Ben Mucha’s role at WESTERN ALLIANCE BANCORPORATION (WAL)?

Ben Mucha is the Chief Accounting Officer of Western Alliance Bancorporation. His Form 4 filing reflects equity-related tax withholding connected to his compensation, providing transparency into his direct holdings in the company’s common stock.