Clint Stein

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
14 Feb 25	COLB Columbia Banking System	Common Stock	Payment of exercise	Dispose F	No	No	27.41	3,922	107.50 k	152,750
14 Feb 25	COLB Columbia Banking System	Common Stock	Payment of exercise	Dispose F	No	No	27.41	1,873	51.34 k	156,672
14 Feb 25	COLB Columbia Banking System	Common Stock	Grant	Acquire A	No	No	27.41	4,759	130.44 k	158,545
1 Jan 25	COLB Columbia Banking System	Common Stock	Payment of exercise	Dispose F	No	No	27.01	6,365	171.92 k	153,786
1 Jan 25	COLB Columbia Banking System	Common Stock	Payment of exercise	Dispose F	No	No	27.01	6,063	163.76 k	160,151
1 Mar 24	COLB Columbia Banking System	RSU Common Stock	Grant	Acquire A	No	No	17.87	55,970	1.00 mm	111,940
1 Mar 24	COLB Columbia Banking System	RSU Common Stock	Grant	Acquire A	No	No	17.87	55,970	1.00 mm	55,970
1 Mar 24	COLB Columbia Banking System	RSU Common Stock	Grant	Acquire A	No	No	17.87	74,627	1.33 mm	74,627
15 Feb 24	COLB Columbia Banking System	Common Stock	Payment of exercise	Dispose F	No	No	19.01	3,923	74.58 k	166,214
15 Feb 24	COLB Columbia Banking System	Common Stock	Payment of exercise	Dispose F	No	No	19.01	1,873	35.61 k	170,137

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.