[8-K] WESTERN ALLIANCE BANCORPORATION Reports Material Event

Rhea-AI Filing Summary

Western Alliance Bancorporation furnished an 8‑K announcing results for the quarter ended September 30, 2025. The company issued a press release and posted its third‑quarter 2025 earnings presentation on its website. These materials are included as Exhibits 99.1 and 99.2.

The information is being “furnished,” not “filed,” under the Exchange Act and is not subject to Section 18 liabilities, nor incorporated by reference unless expressly stated. The presentation is dated October 22, 2025.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  October 21, 2025

WESTERN ALLIANCE BANCORPORATION

(Exact name of registrant as specified in its charter)

Delaware

001-32550

88-0365922

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

One E. Washington Street, Phoenix, Arizona  85004

 (Address of principal executive offices)               (Zip Code)

(602) 389-3500

(Registrant's telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, $0.0001 Par Value

WAL

New York Stock Exchange

Depositary Shares, Each Representing a 1/400th Interest in a Share of 4.250% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series A

WAL PrA

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

On October 21, 2025, Western Alliance Bancorporation (the “Company”) issued a press release reporting results for the fiscal quarter ended September 30, 2025 and posted on its website its third quarter 2025 Earnings Conference Call Presentation, which contains certain additional historical and forward-looking information relating to the Company. Copies of the press release and presentation slides are attached hereto as Exhibits 99.1 and 99.2, respectively.  

The information in this report (including Exhibits 99.1 and 99.2 hereto) is being “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, is not subject to the liabilities of that section and is not deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as shall be expressly set forth by specific reference in such filing.

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.

(d) Exhibits.

99.1						Press Release dated October 21, 2025
99.2						Third Quarter 2025 Earnings Conference Call dated October 22, 2025
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

			WESTERN ALLIANCE BANCORPORATION
			(Registrant)
			/s/ Dale Gibbons
			Dale Gibbons
			Vice Chairman and
			Chief Financial Officer
Date:			October 21, 2025

FAQ

What did Western Alliance (WAL) disclose in this 8‑K?

The company furnished a press release reporting Q3 2025 results and posted an earnings presentation, included as Exhibits 99.1 and 99.2.

Which period do the disclosed results cover for WAL?

The results cover the fiscal quarter ended September 30, 2025.

Are the materials considered filed or furnished by Western Alliance?

They are being “furnished” and are not deemed “filed” under the Exchange Act.

What exhibits accompany the WAL 8‑K?

Exhibit 99.1 is the press release dated October 21, 2025, and Exhibit 99.2 is the Q3 2025 earnings conference call presentation.

When is the Western Alliance earnings presentation dated?

The third quarter 2025 earnings conference call presentation is dated October 22, 2025.

Did WAL indicate where the presentation was posted?

Yes. The company stated it posted the third quarter 2025 earnings presentation on its website.