Columbia Banking System Inc. (COLB)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	21,353,837	$532,564,695	0.01%
2.	Blackrock, Inc.	19,014,475	$474,221,008	0.01%
3.	State Street Corp	10,053,015	$250,722,194	0.01%
4.	Schwab Charles Investment Management Inc	7,667,271	$191,221,739	0.04%
5.	American Century Companies Inc	7,567,090	$188,723,227	0.12%