On August 31, 2025, Tacoma, WA-based Columbia Banking System, Inc. (NASDAQ: COLB, or “the company”) completed an all-stock deal to acquire Irvine, CA-based Pacific Premier Bancorp, Inc. (“Pac Premier”) which added $11.4 billion in loans and $14.5 billion in deposits, including a large portion of low cost deposits, and was accretive to consolidated capital. The merger increased Columbia Bank’s (“the bank”) geographical presence, adding 58 full-service branches in AZ, CA, and the U.S. Pacific Northwest, increasing the total banking office count to 348 as of 1Q26. The acquisition also deepened the bank’s deposit market share in WA to about 10%. While COLB has historically been an active acquirer, management appears comfortable with the company’s current scale, product suite, and geographic footprint,…
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