Investor Presentaiton

Quarter-to-Date Financial Update (as of May 12, 2023) Leading national commercial bank with unique combination of sustained profitability, dependable earnings, controlled high-quality growth, and protected by consistent asset quality standards 1 Stable Deposits -WAL's deposit balances stabilized by March 20 and resumed growth trajectory QTD deposit growth exceeded $2 billion as of May 12, up from $47.6 billion as of March 31 2 3 Insured Deposit Strength - >79% as of May 12, up from 68% as of March 31 Balance Sheet Repositioning On Track - Imminent completion of ~50% in sales of the $6 billion of loans reclassified to HFS in 1Q23 4 HFI Loan / Deposit Ratio Improvement - 94% as of May 12, compared to ~98% as of March 31 LO Enhanced Capital Base - Q2 asset sales have boosted CET1 to 9.7% & TCE/TA to 6.7% as of April 30 6 Strong Asset Quality - Supported by conservative underwriting standards & loan covenants WA Western Alliance BancorporationⓇ | 3

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