Builders Firstsource Inc. (BLDR)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	9,623,707	$1,202,385,909	0.03%
2.	Baillie Gifford & Co	1,560,975	$195,028,217	0.17%
3.	Massachusetts Financial Services Co	1,481,470	$185,094,861	0.06%
4.	Robeco Institutional Asset Management B.v.	1,097,741	$137,151,760	0.27%
5.	Bank Of New York Mellon Corp	933,331	$116,610,333	0.02%