COLUMBIA BANKING SYSTEM INC (COLB) Institutional Ownership and Insiders Activity

COLUMBIA BANKING SYSTEM INC (COLB) is widely held by institutional investors, with 4 tracked firms reporting positions valued at approximately $93.38M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Hancock Classic Value is the largest disclosed holder, reporting approximately $68.24M in COLB holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Hancock Classic Value representing the majority of disclosed value.

Recent insider activity includes 3 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.