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AI brief of an SEC Form 8-K · Columbia Banking System (COLB)

Columbia Banking completes Pacific Premier Bancorp acquisition, adds three directors

Neutral Impact 5 of 5 m&a Written later

Columbia Banking System closed its acquisition of Pacific Premier Bancorp at the effective time of the merger on August 31, 2025, and filed the 8-K on September 2, 2025. The combined company reports about $70 billion in assets, and former Pacific Premier stockholders will hold roughly 30% of Columbia shares after closing.

Key points

  • Each Pacific Premier share converted into 0.9150 of a Columbia common share; Pacific Premier shares ceased trading before the September 2, 2025 Nasdaq open.
  • At closing, Columbia reported approximately $70 billion in assets, $50 billion in loans and $56 billion in deposits, with more than 350 locations across eight western states.
  • Three former Pacific Premier directors joined Columbia's board, including Steven R. Gardner, who will receive $2.2 million under a one-year-and-one-day consulting agreement.
  • Columbia expects to integrate its systems and services in the first quarter of 2026.

The filing

CompanyColumbia Banking System (COLB)
Form8-K, current report
Filed with the SECSep 2, 2025, 8:01 AM ET
Accession number0001193125-25-193405

Items reported: 2.01 Acquisition or Disposition Completed5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:17 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on September 02, 2025.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.