Builders Firstsource Inc. (BLDR)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	13,363,975	$1,669,695,037	0.03%
2.	Fmr Llc	10,723,476	$1,339,791,142	0.09%
3.	Blackrock, Inc.	9,623,707	$1,202,385,909	0.03%
4.	State Street Corp	4,997,110	$624,338,923	0.03%
5.	Wellington Management Group Llp	3,217,125	$401,947,598	0.08%