Columbia Banking System, Inc.'s (COLB) subsidiary, Umpqua Bank, announced expansion across the Western region with new branches opening in Phoenix, Scottsdale and Mesa by the end of 2024. This expansion will support the bank's plan to improve its services across Arizona to cater to the needs of customers. COLB's Subsidiary Strengthens Presence in Arizona Arizona has several fast-growing sectors, including semiconductors, leisure and hospitality alternative energy, healthcare, warehouse distribution centers ...