COLUMBIA BANKING SYSTEM, INC. 8-K

What Happened

• Columbia Banking System, Inc. announced first-quarter 2026 financial results in a press release dated April 23, 2026 (Exhibit 99.1) and issued an investor slide presentation it will review on its April 23 earnings call (Exhibit 99.2).
• The company said it will include final financial statements and additional analyses for the quarter ended March 31, 2026 in its Form 10-Q for that period. The press release and slides are furnished with the 8‑K and are not being "filed" for purposes of Section 18 of the Exchange Act.

Key Details

• Date of announcement: April 23, 2026.
• Reporting period: Quarter ended March 31, 2026.
• Exhibits furnished: 99.1 (press release) and 99.2 (investor presentation).
• Final, detailed financial statements and analyses will appear in the upcoming Form 10-Q.

Why It Matters

• This 8‑K gives investors an early look at Columbia’s Q1 2026 earnings and related slides ahead of the formal 10‑Q filing. The investor presentation and earnings call provide context on quarterly results (earnings/revenue trends) while the Form 10‑Q will contain the complete, audited financial details and disclosures investors use to assess performance and risk.