GREAT LAKES DREDGE & DOCK CO

Ticker: GLDD CUSIP: 390607109 Class: Common Stock

Robeco Institutional Asset Management B.V.'s Holding History (CIK: 0001418773)

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

Q1 2021

Shares 9,143 Value ($000) $133 Avg Close $14.58 Range $12.87 - $16.12

Q4 2020

Shares 23,473 Value ($000) $309 Avg Close $11.20 Range $9.10 - $13.39

Q3 2020

Shares 41,185 Value ($000) $391 Avg Close $9.17 Range $8.17 - $10.57

Q2 2020

Shares 69,653 Value ($000) $645 Avg Close $8.75 Range $7.42 - $10.80

Q1 2020

Shares 220,076 Value ($000) $1,828 Avg Close $9.96 Range $6.75 - $11.96

Q4 2019

Shares 220,076 Value ($000) $2,493 Avg Close $10.68 Range $9.02 - $11.94

Q3 2019

Shares 317,011 Value ($000) $3,313 Avg Close $10.57 Range $9.39 - $11.81

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	9,143	$133	$14.58	$12.87 - $16.12
Q4 2020	23,473	$309	$11.20	$9.10 - $13.39
Q3 2020	41,185	$391	$9.17	$8.17 - $10.57
Q2 2020	69,653	$645	$8.75	$7.42 - $10.80
Q1 2020	220,076	$1,828	$9.96	$6.75 - $11.96
Q4 2019	220,076	$2,493	$10.68	$9.02 - $11.94
Q3 2019	317,011	$3,313	$10.57	$9.39 - $11.81