GREAT LAKES DREDGE & DOCK CO

Ticker: GLDD CUSIP: 390607109 Class: Common Stock

Walleye Trading LLC's Holding History (CIK: 0001388391)

Note: Option positions (PUT/CALL) are excluded.

Q3 2020

Shares 10,600 Value ($000) $101 Avg Close $9.17 Range $8.17 - $10.57

Q1 2019

Shares 16,179 Value ($000) $144 Avg Close $7.78 Range $6.43 - $9.21

Q4 2018

Shares 38,500 Value ($000) $255 Avg Close $6.52 Range $5.37 - $7.94

Q1 2018

Shares 10,700 Value ($000) $49 Avg Close $4.74 Range $4.15 - $5.50

Q1 2017

Shares 4,400 Value ($000) $18 Avg Close $4.59 Range $3.85 - $5.45

Q2 2016

Shares 2,100 Value ($000) $9 Avg Close $4.50 Range $3.96 - $5.09

Q4 2015

Shares 10,200 Value ($000) $40 Avg Close $4.43 Range $3.66 - $5.88

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2020	10,600	$101	$9.17	$8.17 - $10.57
Q1 2019	16,179	$144	$7.78	$6.43 - $9.21
Q4 2018	38,500	$255	$6.52	$5.37 - $7.94
Q1 2018	10,700	$49	$4.74	$4.15 - $5.50
Q1 2017	4,400	$18	$4.59	$3.85 - $5.45
Q2 2016	2,100	$9	$4.50	$3.96 - $5.09
Q4 2015	10,200	$40	$4.43	$3.66 - $5.88