Columbia Banking System Ownership & Insider Activity

Columbia Banking System (COLB) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 1.7% of shares outstanding. Institutional investors hold 74.9%.

Shares Outstanding

282.902M

Shares Float

281.237M

Insider Shares Owned

4.799M

Insider % Owned

1.7%

Institutional Shares Held

212.020M

Institutional % Held

74.9%

Ownership Breakdown

Net Insider Activity by Month

Columbia Banking System Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Jun 30, 2026	James Aaron Deer	EVP CHIEF STRATEGY/INNOV OFFCR	BUY	886.000	$25.37	$22K
Jun 8, 2026	David Devine Moore	EVP CHIEF MARKETING OFFICER	SELL	3.872K	$29.77	$115K

Date	Member	Party	Chamber	Action	Amount
Mar 5, 2026	Josh Gottheimer	D	House	Sale	$1,001 - $15,000
Jan 15, 2026	Gilbert Ray Cisneros	D	House	Sale	$15,001 - $50,000
Oct 3, 2025	Gilbert Ray Cisneros	D	House	Purchase	$1,001 - $15,000