Columbia Banking System Inc. (COLB)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	29,851,392	$768,374,831	0.01%
2.	Blackrock, Inc.	26,934,872	$693,303,606	0.01%
3.	Wellington Management Group Llp	13,782,222	$354,754,393	0.06%
4.	State Street Corp	13,407,671	$345,113,452	0.01%
5.	Dimensional Fund Advisors Lp	13,116,339	$337,611,053	0.07%