Columbia Banking System Inc. (COLB)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	21,328,675	$576,087,511	0.01%
2.	Blackrock, Inc.	19,175,120	$517,920,011	0.01%
3.	State Street Corp	10,880,429	$293,880,387	0.01%
4.	American Century Companies Inc	7,602,571	$205,345,443	0.11%
5.	Schwab Charles Investment Management Inc	7,315,896	$197,602,351	0.03%