Great Lakes Dredge & Dock Corp (GLDD)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Rhumbline Advisers	102,310	$890,085	0%
2.	Massmutual Trust Co Fsbv	4,767	$41,473	0%
3.	Byrne Asset Management LlcBOND	4,598	$40,003	0.03%
4.	Gamma Investing Llc	1,950	$16,965	0%
5.	Parallel Advisors, Llc	1,657	$14,416	0%