Trade Summary

3 days ago, Moore Devine David, serving as EVP Chief Marketing Officer at COLUMBIA BANKING SYSTEM, INC. (COLB), sold 3,872 shares at $29.77 per share, for a total transaction value of $115,288.50. Following this transaction, Moore Devine David now holds 18,636 shares of COLB.

This sale represents a 17.20% decrease in Moore Devine David's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Monday, June 8, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, June 10, 2026 at 4:52 PM ET, 2 days after the trade was made.

COLUMBIA BANKING SYSTEM, INC. operates in the FINANCIAL SERVICES sector, specifically within the BANKS - REGIONAL industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.