HOLDCO ASSET MANAGEMENT RELEASES PRESENTATION PREVIOUSLY PROVIDED TO THE BOARD OF DIRECTORS OF COLUMBIA BANKING SYSTEM, INC. ON SEPTEMBER 14, 2025

Core Insights - HoldCo Asset Management, LP has released a follow-up presentation to the Board of Directors of Columbia Banking System, Inc., highlighting the need for protective covenants due to failed gambles solely borne by owners [1] Company Overview - HoldCo Asset Management, LP is based in Fort Lauderdale, Florida, and manages approximately $2.6 billion in regulatory assets [2] Investment Position - HoldCo disclosed ownership of common stock in Columbia Banking System, Inc., indicating an economic interest in the price of these securities [1][2]