[Form 4] WESTERN ALLIANCE BANCORPORATION Insider Trading Activity

Rhea-AI Filing Summary

Western Alliance Bancorporation Chief Administration Officer Timothy W. Boothe reported routine equity compensation activity. On March 15, 2026, he exercised derivative awards labeled as cash-settled restricted stock units, acquiring an aggregate of 235 units, each economically equivalent to one share of common stock, according to the footnotes.

On the same date, matching 235 shares of common stock were disposed of to the issuer at $67.97 per share, resulting in no net change in his economic exposure from these transactions. Following the reported activity, Boothe holds 65,417 shares of common stock directly and 325 shares indirectly through his spouse.

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^*

Boothe Timothy W

(Last) (First) (Middle)

ONE E. WASHINGTON ST., SUITE 1400

(Street)

PHOENIX AZ 85004

(City) (State) (Zip)

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 Administration Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/15/2026

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

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

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

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	03/15/2026		M		97(1)	A	$0(2)	65,514	D
Common Stock	03/15/2026		D		97	D	$67.97	65,417	D
Common Stock	03/15/2026		M		69(3)	A	$0(2)	65,486	D
Common Stock	03/15/2026		D		69	D	$67.97	65,417	D
Common Stock	03/15/2026		M		69(4)	A	$0(2)	65,486	D
Common Stock	03/15/2026		D		69	D	$67.97	65,417	D
Common Stock								325	I	Alvina Boothe (spouse)

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
Cash Settled Restricted Stock Units	(2)	03/15/2026		M			97	(1)	(1)	Common Stock	97	(2)	1,070	D
Cash Settled Restricted Stock Units	(2)	03/15/2026		M			69	(3)	(3)	Common Stock	69	(2)	1,586	D
Cash Settled Restricted Stock Units	(2)	03/15/2026		M			69	(4)	(4)	Common Stock	69	(2)	2,400	D

Explanation of Responses:

1. 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.

2. Each unit is the economic equivalent of one share of Western Alliance Bancorporation common stock.

3. 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.

4. 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.

Remarks:

	/s/Jessica Jarvi (Attorney-in-fact)	03/17/2026
	** 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.

FAQ

What did WAL executive Timothy W. Boothe report in this Form 4?

Timothy W. Boothe reported routine equity compensation activity involving derivative exercises and related dispositions. He exercised cash-settled restricted stock units and had matching common shares disposed to the issuer, leaving his overall economic exposure essentially unchanged after the transactions.

How many derivative units did WAL CAO Timothy Boothe exercise?

Timothy Boothe exercised a total of 235 cash-settled restricted stock units. Footnotes state each unit is economically equivalent to one share of Western Alliance common stock, so the derivative activity mirrors exposure to 235 shares of the company’s stock.

At what price were Western Alliance (WAL) shares disposed to the issuer?

The reported dispositions to the issuer were priced at $67.97 per share. These were coded as issuer dispositions and matched the same number of shares as those acquired through derivative exercises on the same date.

What are Timothy Boothe’s WAL share holdings after these transactions?

After the reported transactions, Timothy Boothe directly holds 65,417 shares of Western Alliance common stock. He also indirectly holds 325 shares through his spouse, as disclosed in the indirect ownership entry for this Form 4.

Do these WAL Form 4 transactions indicate open-market buying or selling?

No, the transactions are not open-market trades. They are reported as derivative exercises (code M) and dispositions to the issuer (code D). The filing shows no open-market purchases or sales, and the net buy/sell share count is reported as neutral.

How often do the reported cash-settled units for WAL vest and pay out?

Footnotes state the cash-settled units vest monthly, with 1/36th vesting on the 15th of each month over 36 months for each grant, across periods beginning in March 2024, March 2025, and March 2026.