Gibraltar Industries Inc. (ROCK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	5,430,605	$428,909,183	0.01%
2.	Vanguard Group Inc	2,819,914	$222,716,808	0%
3.	Dimensional Fund Advisors Lp	1,784,107	$140,911,141	0.04%
4.	Victory Capital Management Inc	1,430,361	$112,969,911	0.11%
5.	State Street Corp	1,129,953	$89,243,688	0%