Columbia Banking System is a bank holding company operating Columbia Bank, a regional commercial bank serving the western U.S. across eight states: Oregon, Washington, Idaho, California, Nevada, Arizona, Colorado, and Utah. Columbia focuses on middle market and small business customers, along with their owners and employees, as well as individual consumers. The bank operates roughly 360 branches and a direct relationship banking model. Columbia's core business is commercial banking — taking in deposits and making loans, primarily C&I loans, owner-occupied commercial real estate, and commercial lines of credit. Columbia also offers treasury management, equipment leasing through its FinPac subsidiary, SBA financing, wealth management (investment, trust, and private banking), and residential mortgage origination. Columbia generates revenue primarily through net interest income, driven by its loan yields and a low-cost core deposit franchise heavily weighted toward business operating accounts and non-interest-bearing deposits. Fee income comes from treasury management, wealth management, commercial card, and mortgage banking. Columbia has grown significantly through M&A, most recently acquiring Pacific Premier Bancorp in August 2025, which added Southern California presence and specialty deposit businesses including HOA banking and custodial trust. Columbia's near-term focus is on organic growth, de novo branch expansion in Arizona, Colorado, and Utah, and balance sheet optimization — running off a legacy portfolio of below-market transactional real estate loans and redeploying into higher-yielding relationship-based commercial loans.