What does CUSIP 390607109 represent in this 13F holders report?

CUSIP 390607109 is the security identifier for GLDD - Great Lakes Dredge & Dock Corp - Common Stock used to aggregate holder disclosures.

How many institutions held GLDD - Great Lakes Dredge & Dock Corp - Common Stock in Q1 2018?

93 institutional investors reported GLDD - Great Lakes Dredge & Dock Corp - Common Stock for Q1 2018. Use the holders table for investor-level position and value details.

Great Lakes Dredge & Dock Corp - Common Stock (GLDD)

CUSIP: 390607109

Q1 2018 13F Holders as of 31 Mar 2018

Security type / class: Equity / Common Stock
Total 13F shares: 48,559,259
Total 13F value: $223,314,104
Share change: +1,565,994
Put/Call ratio: 185%
SEC-reported price per share: $4.60
Number of holders: 93
Value change: +$6,170,833
Number of buys: 38
Number of sells: 49
Shares outstanding: 66,399,451

Security key

390607109

Report period

Q1 2018

Institutions

Top holders

GLDD full security history Ownership snapshot Full 13F holder table Great Lakes Dredge & Dock CORP SEC filings Great Lakes Dredge & Dock CORP company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of GLDD - Great Lakes Dredge & Dock Corp - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

DIMENSIONAL FUND ADVISORS LP

Disclosed value leader

DIMENSIONAL FUND ADVISORS LP

Comparable rows

15/15

Latest evidence

31 Dec 2017

13F Lead comparable stake: 7.9% Showing 1-6 of 15 holder rows.

Quick read

DIMENSIONAL FUND ADVISORS LP leads the comparable SEC ownership view at 7.9%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens DIMENSIONAL FUND ADVISORS LP's linked filing trail.

Comparable ownership Top 5

DIMENSIONAL FUND ADVISORS LP 7.9%

JENNISON ASSOCIATES LLC 7.4%

BlackRock Finance, Inc. 5.7%

Russell Investments Group, Ltd. 5.3%

Boston Partners 4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	7.9%	$28,165,000 5,215,739 shares	—	31 Dec 2017
JENNISON ASSOCIATES LLC	13F Company 13F	7.4%	$26,682,000 4,941,042 shares	—	31 Dec 2017
BlackRock Finance, Inc.	13F Company 13F	5.7%	$20,370,000 3,772,579 shares	—	31 Dec 2017
Russell Investments Group, Ltd.	13F Company 13F	5.3%	$19,099,000 3,537,155 shares	—	31 Dec 2017
Boston Partners	13F Company 13F	4%	$14,396,000 2,666,042 shares	—	31 Dec 2017
VANGUARD GROUP INC	13F Company 13F	4%	$14,290,000 2,646,194 shares	—	31 Dec 2017

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2018

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

48,559,259

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2018 vs Q1 2018 Across Filers

Q1 2018 holders

Holder diff

Investor	Q1 2018 Shares	Q1 2018 Shares	Share Diff	Share Chg %	Q1 2018 value	Q1 2018 value	Value change	Value Chg %