COLB

Columbia Banking System, Inc.$29.84-0.10 (-0.33%)

Prev Close$29.95·MCap$8.52B·P/E13.21·Vol1.34M·Yield0.05%

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Buys (12M)

$22.5K

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Sells (12M)

$942.1K

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Net Activity

Net Seller

$919.6K

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at Columbia Banking System, Inc. (COLB) has been dominated by selling, with 1 insider purchase totaling $22.5K and 13 insider sales totaling $942.1K. The most recent insider transaction was by Deer Aaron James (officer: EVP Chief Strategy/Innov Offcr), who purchased $22.5K worth of shares on Jul 2, 2026. Columbia Banking System, Inc. operates in the Financial Services sector, within the Banks - Regional industry, with a market cap of $8.52B.

COLB Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Jul 2, 2026	Deer Aaron James	officer: EVP Chief Strategy/Innov Offcr	Buy	886	$25.37	$22.5K	42,761
Jun 10, 2026	Moore Devine David	officer: EVP Chief Marketing Officer	Sell	3,872	$29.77	$115.3K	22,448
Mar 17, 2026	BARUFFI KUMI YAMAMOTO	officer: EVP General Counsel, Corp Sec	Sell	937	$26.23	$24.6K	53,715
Mar 17, 2026	Lakely Brock	officer: EVP, Chief Accounting Officer	Sell	211	$26.23	$5.5K	11,104
Feb 15, 2026	Anderson Drew K	EVP Chief Admin Officer	Sell	788	$31.49	$24.8K	0
Feb 15, 2026	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Sell	1,036	$31.49	$32.6K	0
Feb 15, 2026	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Sell	531	$31.49	$16.7K	0
Feb 15, 2026	Merrywell Christopher	Senior Executive VP	Sell	1,706	$31.49	$53.7K	0
Feb 15, 2026	Moore Devine David	EVP Chief Marketing Officer	Sell	485	$31.49	$15.3K	0
Feb 15, 2026	Namdar Frank	EVP Chief Credit Officer	Sell	1,169	$31.49	$36.8K	0
Feb 15, 2026	Nixon Torran B	Senior Executive VP	Sell	1,905	$31.49	$60.0K	0
Feb 15, 2026	OGNALL ANDREW H	EVP Chief Risk Officer	Sell	931	$31.49	$29.3K	0
Feb 15, 2026	Stein Clint	Chair, President, CEO	Sell	3,922	$31.49	$123.5K	0
Feb 3, 2026	GARDNER STEVEN R	director	Sell	13,725	$29.43	$403.9K	0Exit

COLB Insider Buying Activity

The following table shows recent insider purchases of Columbia Banking System, Inc. (COLB) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Jul 2, 2026	Deer Aaron James	officer: EVP Chief Strategy/Innov Offcr	Buy	886	$25.37	$22.5K	42,761

COLB Insider Selling Activity

The following table shows recent insider sales of Columbia Banking System, Inc. (COLB) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Jun 10, 2026	Moore Devine David	officer: EVP Chief Marketing Officer	Sell	3,872	$29.77	$115.3K	22,448
Mar 17, 2026	BARUFFI KUMI YAMAMOTO	officer: EVP General Counsel, Corp Sec	Sell	937	$26.23	$24.6K	53,715
Mar 17, 2026	Lakely Brock	officer: EVP, Chief Accounting Officer	Sell	211	$26.23	$5.5K	11,104
Feb 15, 2026	Anderson Drew K	EVP Chief Admin Officer	Sell	788	$31.49	$24.8K	0
Feb 15, 2026	BARUFFI KUMI YAMAMOTO	EVP General Counsel, Corp Sec	Sell	1,036	$31.49	$32.6K	0
Feb 15, 2026	Deer Aaron James	EVP Chief Strategy/Innov Offcr	Sell	531	$31.49	$16.7K	0
Feb 15, 2026	Merrywell Christopher	Senior Executive VP	Sell	1,706	$31.49	$53.7K	0
Feb 15, 2026	Moore Devine David	EVP Chief Marketing Officer	Sell	485	$31.49	$15.3K	0
Feb 15, 2026	Namdar Frank	EVP Chief Credit Officer	Sell	1,169	$31.49	$36.8K	0
Feb 15, 2026	Nixon Torran B	Senior Executive VP	Sell	1,905	$31.49	$60.0K	0
Feb 15, 2026	OGNALL ANDREW H	EVP Chief Risk Officer	Sell	931	$31.49	$29.3K	0
Feb 15, 2026	Stein Clint	Chair, President, CEO	Sell	3,922	$31.49	$123.5K	0
Feb 3, 2026	GARDNER STEVEN R	director	Sell	13,725	$29.43	$403.9K	0Exit