阿莱恩斯西部银行 2026年季度报告

FORM 10-Q ark One) ☒Quarterly Report Pursuant to Section13 or 15(d) of the Securities Exchange Act of 1934 Transition Report Pursuant to Section13 or 15(d) of the Securities Exchange Act of 1934For the transition period from__________to __________ Commission file number: 001-32550 WESTERN ALLIANCE BANCORPORATION (Exact name of registrant as specified in its charter) Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to suchfiling requirements for the past 90days.YesNo Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405of RegulationS-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the registrant was required to submitsuch files).YesNo Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or anemerging growth company. See the definitions of “large accelerated filer,” "accelerated filer," "smaller reporting company," and "emerging growthcompany" in Rule 12b-2 of the Exchange Act. Large accelerated filer☒Non accelerated filer☐ Accelerated filer☐Smallerreportingcompany☐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 anynew or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ As of May4, 2026, Western Alliance Bancorporation had 109,185,360 shares of common stock outstanding. INDEX Glossary of Entities and Terms PART I. FINANCIAL INFORMATION Item 1.Financial Statements (Unaudited)Consolidated Balance SheetsConsolidated Income StatementsConsolidated Statements of Comprehensive IncomeConsolidated Statements of EquityConsolidated Statements of Cash FlowsNotes to Unaudited Consolidated Financial StatementsItem 2.Management's Discussion and Analysis of Financial Condition and Results of OperationsItem 3.Quantitative and Qualitative Disclosures About Market RiskItem 4.Controls and Procedures PARTII. OTHER INFORMATION Item1.Legal ProceedingsItem1A.Risk FactorsItem 2.Unregistered Sales of Equity Securities and Use of ProceedsItem 5.Other InformationItem6.Exhibits SIGNATURES GLOSSARY OF ENTITIES AND TERMS The acronyms and abbreviations identified below are used in various sections of this Form 10-Q, including the Consolidated FinancialStatements and the Notes to Unaudited Consolidated Financial Statements in Item 1 and "Management's Discussion and Analysis ofFinancial Condition and Results of Operations," in Item 2 of this Form 10-Q. PART I. FINANCIAL INFORMATION Item 1.Financial StatementsWESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIESCONSOLIDATED BALANCE SHEETS WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIESCONSOLIDATED INCOME STATEMENTS WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CASH FLOWS Supplemental disclosure: WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of operations WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WALprovides a full spectrum of customized loan, deposit, and treasury management capabilities, including funds transfer and other digitalpayment offerings through its wholly-owned banking subsidiary, WAB. The Company also serves business customers through a national platform of specialized financial services, including mortgagebanking services through AmeriHome and digital payment services for the class action legal industry. In addition, the Company hasthe following non-bank subsidiaries: CSI, a captive insurance company formed and licensed under the laws of the state of Arizona andestablished as part of the Company's overall enterprise risk management strategy, and WATC, which provides corporate trust servicesand levered loan administration solutions. Basis of presentation The accompanying Unaudited Consolidated Financial Statements as of March 31, 2026 and for the three months ended March 31,2026 and 2025 have been prepared in accordance with GAAP for interim financial information and Article 10 of Regulation S-X and,therefore, do not include all of the information and footnotes required by GAAP for complete financial statements. Accordingly, thesestatements