Lasse Petterson - 16 Mar 2026 Form 4 Insider Report for Great Lakes Dredge & Dock CORP (GLDD)

Role
CEO & President, Director
Signature
/s/Vivienne R. Schiffer, by Power of Attorney
Issuer symbol
GLDD
Transactions as of
16 Mar 2026
Net transactions value
$0
Form type
4
Filing time
18 Mar 2026, 17:10:38 UTC
Previous filing
25 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Petterson Lasse CEO & President, Director C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON /s/Vivienne R. Schiffer, by Power of Attorney 18 Mar 2026 0001455941

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction GLDD Common Stock Award +94,540 +7.3% 1,386,742 16 Mar 2026 Direct F1
transaction GLDD Common Stock Tax liability -37,202 -2.7% $16.93* 1,349,540 16 Mar 2026 Direct
transaction GLDD Common Stock Tax liability -20,033 -1.5% $16.93* 1,329,507 16 Mar 2026 Direct
transaction GLDD Common Stock Tax liability -15,529 -1.2% $16.93* 1,313,978 16 Mar 2026 Direct
transaction GLDD Common Stock Award +78,924 +6% 1,392,902 16 Mar 2026 Direct F2
transaction GLDD Common Stock Tax liability -31,057 -2.2% $16.93* 1,361,845 16 Mar 2026 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents shares awarded pursuant to satisfaction of performance conditions per the terms of Mr. Petterson's performance-based restricted stock units granted on March 15, 2023.
F2 Represents shares awarded pursuant to satisfaction of performance conditions per the terms of Mr. Petterson's performance-based restricted stock units granted on March 15, 2024.