Drew K Anderson Columbia Banking System, Inc. (COLB) insider trading activity

Drew K Anderson is EVP Chief Admin Officer of COLUMBIA BANKING SYSTEM, INC.. Currently has a direct ownership of 21,838 shares of COLB, which is worth approximately $588,097. The most recent transaction as insider was on Jan 20, 2026, when has been sold 1,114 shares (Common Stock) at a price of $28.35 per share, resulting in proceeds of $31,581. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 21.8K

6.44% 3M change

20.0% 12M change

Total Value Held $588,097

Drew K Anderson Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jan 20 2026	SELL Payment of exercise price or tax liability	$31,581 $28.35 p/Share	1,114 Reduced 4.85%	21,838 Common Stock
Jan 20 2026	SELL Sale (or disposition) back to the issuer	-	390 Reduced 1.67%	22,952 Common Stock
Feb 28 2025	SELL Payment of exercise price or tax liability	$82,087 $26.73 p/Share	3,071 Reduced 11.63%	23,342 Common Stock
Feb 14 2025	SELL Payment of exercise price or tax liability	$24,230 $27.41 p/Share	884 Reduced 3.24%	26,413 Common Stock
Jun 21 2024	SELL Payment of exercise price or tax liability	$10,615 $18.43 p/Share	576 Reduced 2.07%	27,297 Common Stock
Mar 08 2024	SELL Payment of exercise price or tax liability	$5,813 $19.51 p/Share	298 Reduced 1.06%	27,873 Common Stock
Mar 01 2024	BUY Grant, award, or other acquisition	$199,983 $17.87 p/Share	11,191 Added 28.43%	28,171 Common Stock

Feb 28 2024	SELL Payment of exercise price or tax liability	$22,448 $17.76 p/Share	1,264 Reduced 6.93%	16,980 Common Stock
Feb 15 2024	SELL Payment of exercise price or tax liability	$16,804 $19.01 p/Share	884 Reduced 4.62%	18,244 Common Stock
Jun 21 2023	SELL Payment of exercise price or tax liability	$12,543 $21.74 p/Share	577 Reduced 2.93%	19,128 Common Stock
Mar 08 2023	SELL Payment of exercise price or tax liability	$7,934 $27.36 p/Share	290 Reduced 1.45%	19,706 Common Stock
Mar 02 2023	SELL Payment of exercise price or tax liability	$7,674 $29.07 p/Share	264 Reduced 1.3%	19,996 Common Stock

DKA

Drew K Anderson

EVP Chief Admin Officer

Tacoma, WA

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