Columbia Banking faces three shareholder lawsuits over merger with Pacific Premier; adds proxy disclosures

COLUMBIA BANKING SYSTEM, INC.

Three complaints filed: Siegel (Columbia shareholders), Clark and Parshall (Pacific Premier stockholders) allege breach of fiduciary duty and misrepresentations in merger proxy.
Columbia and Pacific Premier deny allegations but voluntarily supplement Joint Proxy Statement/Prospectus to moot disclosure claims without admitting liability.
Supplemental disclosures include additional merger background, comparable company analyses, discount rate calculations, and pro forma EPS/TBV accretion/dilution.
Complaints seek injunctive relief to stop shareholder vote on share issuance until omitted information is disclosed, and rescission if consummated.
Additional demand letters from shareholders also demand supplemental disclosures; more similar complaints may be filed.

item 8.01

This headline and bullets were generated automatically by deepseek-v4-flash:cloud@v2 from the public filing. Read the source on SEC.gov before relying on any specific claim. Not investment advice. See methodology for how this pipeline works.