COLUMBIA BANKING SYSTEM, INC.

• 8-KInvestor update

  Filed Sep 30

  Oct. 22 earnings release set for after market close; investor call includes a management update and live Q&A.

• 8-KDividend

  Filed Aug 14

  Quarterly cash dividend approved; shareholders of record Aug. 28 will be paid Sept. 14.

• 10-QQ2 FY2026Cybersecurity incidentRestructuring

  Filed Aug 4

  Pacific Premier conversion is complete; Columbia is shifting from brokered deposits and transactional loans to customer-funded relationship lending.

  • Net revenue$677.0MYoY +32.5%
  • Net income$208.0MYoY +36.8%

• 8-KLeadership change

  Filed Jul 30

  Simone Lagomarsino appointed to board pending Oregon regulatory approval; she will serve on Audit and Enterprise Risk Management committees.

• 8-KPositiveEarnings

  Filed Jul 23

  Pacific Premier integration and cost synergies were essentially complete, lowering expenses as lower-return loans ran off.

• 8-K

  Filed Jun 30

  Q2 earnings release set for July 23 after market close; Columbia’s investor call with Q&A is scheduled for 2 p.m. PT that day.

• 8-KDividend

  Filed May 15

  Quarterly cash dividend approved for June 15 payment to shareholders of record May 29.

• 8-KShareholder vote

  Filed May 15

  Shareholders elected all director nominees, approved executive pay and ratified Deloitte & Touche as FY2026 auditor.

• 10-QQ1 FY2026PositiveCybersecurity incidentRestructuring

  Filed May 5

  Pacific Premier systems conversion is complete; full cost-synergy benefits are expected from Q3 as problem loans rise.

  • Net revenue$677.0MYoY +37.9%
  • Net income$192.0MYoY +120.7%

• 8-KPositiveEarningsGuidanceRestructuring

  Filed Apr 23

  Pacific Premier systems conversion and branch consolidations are complete; an agricultural relationship drove credit deterioration.

• 8-K

  Filed Mar 31

  Q1 earnings release set for April 23 after market close, followed by a same-day investor call and live Q&A.

• 10-KFY2025PositiveRestructuringImpairment / chargeLegal / investigation

  Filed Feb 26

  Pacific Premier deal expanded Southern California banking; merger costs and share issuance cut EPS ahead of 2026 integration.

  • Net revenue$2.3BYoY +19.3%
  • Net income$550.0MYoY +3.0%

• 8-KDividend

  Filed Feb 13

  Quarterly cash dividend approved for payment 3/16/2026 to shareholders of record 2/27/2026.

• 8-KPositiveEarningsCEO/CFO changeRestructuring

  Filed Jan 22

  Pacific Premier’s full-quarter contribution and lower funding costs lifted Q4 earnings; systems conversion and branch consolidations are set for Q1 2026.

Coverage: 10-K filings filed since Feb 26, 2026; 10-Q since May 5, 2026; 8-K since Jan 22, 2026.

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