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

Role
SVP-Project Acquisition & Ops
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, 17:01:14 UTC
Previous filing
25 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
JOHANSON DAVID SVP-Project Acquisition & Ops C/O GREAT LAKES DREDGE & DOCK CORP., 9811 KATY FREEWAY, SUITE 1200, HOUSTON /s/Vivienne R. Schiffer, by Power of Attorney 18 Mar 2026 0001940445

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction GLDD Common Stock Tax liability -1,659 -1.6% $16.93* 104,292 16 Mar 2026 Direct
transaction GLDD Common Stock Award +12,646 +12% 116,938 16 Mar 2026 Direct F1
transaction GLDD Common Stock Tax liability -3,080 -2.6% $16.93* 113,858 16 Mar 2026 Direct
transaction GLDD Common Stock Tax liability -1,029 -0.9% $16.93* 112,829 16 Mar 2026 Direct
transaction GLDD Common Stock Award +8,444 +7.5% 121,273 16 Mar 2026 Direct F2
transaction GLDD Common Stock Tax liability -2,057 -1.7% $16.93* 119,216 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. Johanson'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. Johanson's performance-based restricted stock units granted on March 15, 2024.