COLB ▼ -0.5% - Columbia Banking System, Inc. $COLB COLB - Columbia Banking System Announces Pricing of Subordinated Notes Columbia Banking System announced the pricing of subordinated notes, a debt offering that typically provides capital for the bank. The stock declined 0.5% today following the announcement, which may reflect investor concerns about increased leverage or dilution of equity value through additional debt issuance. 14-SEP-2026 08:15 AM ET