X0306 4/A 2021-07-02 2020-06-11 0 0001372020 Great Lakes Dredge & Dock CORP GLDD 0001363032 Levenson Ryan C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200 HOUSTON TX 77024 1 0 0 0 Common Stock 2020-06-11 4 S 0 41879 9.3272 D 150239 I By Privet Fund LP Due to an error from a transposition of numbers, this Amendment is being filed to correct the number of shares from 41,897 to 41,879 for the reported transaction. Represents shares owned directly by Privet Fund LP ("Privet Fund"). Mr. Levenson, solely by virtue of his position as the managing member of Privet Fund Management LLC ("Privet Fund Management"), the general partner and investment manager of Privet Fund, may be deemed to beneficially own the shares owned directly by Privet Fund for purposes of Section 16. Mr. Levenson disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. /s/Vivienne R. Schiffer, by Power of Attorney 2021-07-02