Exhibit 99.1 CONTACT: MARK J. GRESCOVICH, PRESIDENT & CEO ROBERT G. BUTTERFIELD, CFO (509) 527-3636 NEWS RELEASE Banner Corporation Reports Net Income of $46.4 Million, or $1.34 Per Diluted Share, for Fourth Quarter 2024; At December 31, 2024, Banner, on a consolidated basis, had $16.20 billion in assets, $11.20 billion in net loans and $13.51 billion in deposits. Banner operates 135 full-service branch offices, including branches located in eight of the top 20 largest western Metropolitan Statistical Areas ...