Columbia Banking System Inc. (COLB)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	19,014,475	$474,221,008	0.01%
2.	Massachusetts Financial Services Co	5,883,429	$146,732,718	0.05%
3.	Bank Of New York Mellon Corp	3,039,363	$75,801,697	0.02%
4.	Cooke & Bieler Lp	2,150,641	$53,636,987	0.54%
5.	Segall Bryant & Hamill, Llc	1,474,244	$36,767,645	0.56%