GREAT LAKES DREDGE & DOCK CO

Ticker: GLDD CUSIP: 390607109 Class: Common Stock

BOKF, NA's Holding History (CIK: 0000009634)

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

Q2 2020

Shares 10,990 Value ($000) $102 Avg Close $8.75 Range $7.42 - $10.80

Q1 2020

Shares 10,450 Value ($000) $87 Avg Close $9.96 Range $6.75 - $11.96

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	10,990	$102	$8.75	$7.42 - $10.80
Q1 2020	10,450	$87	$9.96	$6.75 - $11.96