GLDD

Great Lakes Dredge & Dock CORP

Insider trading activity for Great Lakes Dredge & Dock CORP, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 82 most recent Form 4 transactions.

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Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Apr 1	Schiffer Vivienne	SVP, CLO, CCO & Corp…	UTENDR	144,817	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Schiffer Vivienne	SVP, CLO, CCO & Corp…	AGRANT	28,945	—	—	+25.0%	Open the original filing on SEC.gov
Apr 1	Petterson Lasse	CEO & President	UTENDR	1.6M	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Petterson Lasse	CEO & President	AGRANT	206,445	—	—	+15.2%	Open the original filing on SEC.gov
Apr 1	Kornblau Scott Lee	SVP & CFO	UTENDR	244,126.24	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Kornblau Scott Lee	SVP & CFO	AGRANT	90,518	—	—	+58.9%	Open the original filing on SEC.gov
Apr 1	Johanson David	SVP-Project Acquisition…	UTENDR	191,597.52	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Johanson David	SVP-Project Acquisition…	AGRANT	71,860	—	—	+60.0%	Open the original filing on SEC.gov
Apr 1	Hanson William H	SVP, Market Development	UTENDR	90,852.74	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Hanson William H	SVP, Market Development	AGRANT	13,631	—	—	+17.6%	Open the original filing on SEC.gov
Apr 1	Steger Ronald	Director	DTOISS◆	45,068	—	—	—	Open the original filing on SEC.gov
Apr 1	Steger Ronald	Director	UTENDR	20,404	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Shipp Earl L	Director	UTENDR	42,619	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Shanahan Kathleen M	Director	UTENDR	76,375	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Gunsten Christopher	SVP-Proj Svcs & Fleet…	UTENDR	182,496	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Gunsten Christopher	SVP-Proj Svcs & Fleet…	AGRANT	71,860	—	—	+65.0%	Open the original filing on SEC.gov
Apr 1	Dickerson Lawrence R	Director	DTOISS◆	76,962	—	—	—	Open the original filing on SEC.gov
Apr 1	Dickerson Lawrence R	Director	UTENDR	86,217	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Beyko Eleni	SVP - Offshore Energy	UTENDR	151,312	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Beyko Eleni	SVP - Offshore Energy	AGRANT	25,505	—	—	+20.3%	Open the original filing on SEC.gov
Apr 1	Bayer Ryan	VP & CAO	UTENDR	37,380	—	—	-100.0%	Open the original filing on SEC.gov
Apr 1	Bayer Ryan	VP & CAO	AGRANT	5,607	—	—	+17.6%	Open the original filing on SEC.gov
Apr 1	Armstrong Dana A	Director	UTENDR	8,436	—	—	-100.0%	Open the original filing on SEC.gov
Mar 31	Steger Ronald	Director	AGRANT◆	1,625	—	—	—	Open the original filing on SEC.gov
Mar 31	Shanahan Kathleen M	Director	DTOISS◆	10,336	—	—	—	Open the original filing on SEC.gov
Mar 31	Shanahan Kathleen M	Director	AGRANT◆	1,485	—	—	—	Open the original filing on SEC.gov
Mar 31	Dickerson Lawrence R	Director	AGRANT◆	2,938	—	—	—	Open the original filing on SEC.gov
Mar 25	Johanson David	SVP-Project Acquisition…	AGRANT	521.26	$10.82	$5.6K	+0.4%	Open the original filing on SEC.gov
Mar 16	Schiffer Vivienne	SVP, CLO, CCO & Corp…	FTAX	2,546	$16.93	$43.1K	-2.1%	Open the original filing on SEC.gov
Mar 16	Schiffer Vivienne	SVP, CLO, CCO & Corp…	AGRANT	10,454	—	—	+9.7%	Open the original filing on SEC.gov
Mar 16	Schiffer Vivienne	SVP, CLO, CCO & Corp…	FTAX	2,058	$16.93	$34.8K	-1.9%	Open the original filing on SEC.gov
Mar 16	Schiffer Vivienne	SVP, CLO, CCO & Corp…	FTAX	3,461	$16.93	$58.6K	-3.0%	Open the original filing on SEC.gov
Mar 16	Schiffer Vivienne	SVP, CLO, CCO & Corp…	AGRANT	14,213	—	—	+14.3%	Open the original filing on SEC.gov
Mar 16	Schiffer Vivienne	SVP, CLO, CCO & Corp…	FTAX	2,060	$16.93	$34.9K	-2.0%	Open the original filing on SEC.gov
Mar 16	Petterson Lasse	CEO & President	FTAX	31,057	$16.93	$525.8K	-2.2%	Open the original filing on SEC.gov
Mar 16	Petterson Lasse	CEO & President	AGRANT	78,924	—	—	+6.0%	Open the original filing on SEC.gov
Mar 16	Petterson Lasse	CEO & President	FTAX	15,529	$16.93	$262.9K	-1.2%	Open the original filing on SEC.gov
Mar 16	Petterson Lasse	CEO & President	FTAX	20,033	$16.93	$339.2K	-1.5%	Open the original filing on SEC.gov
Mar 16	Petterson Lasse	CEO & President	FTAX	37,202	$16.93	$629.8K	-2.7%	Open the original filing on SEC.gov
Mar 16	Petterson Lasse	CEO & President	AGRANT	94,540	—	—	+7.3%	Open the original filing on SEC.gov
Mar 16	Kornblau Scott Lee	SVP & CFO	FTAX	5,851	$16.93	$99.1K	-3.7%	Open the original filing on SEC.gov
Mar 16	Kornblau Scott Lee	SVP & CFO	AGRANT	14,868	—	—	+10.3%	Open the original filing on SEC.gov
Mar 16	Kornblau Scott Lee	SVP & CFO	FTAX	2,926	$16.93	$49.5K	-2.0%	Open the original filing on SEC.gov
Mar 16	Kornblau Scott Lee	SVP & CFO	FTAX	8,762	$16.93	$148.3K	-5.6%	Open the original filing on SEC.gov
Mar 16	Kornblau Scott Lee	SVP & CFO	AGRANT	22,265	—	—	+16.6%	Open the original filing on SEC.gov
Mar 16	Kornblau Scott Lee	SVP & CFO	FTAX	4,719	$16.93	$79.9K	-3.4%	Open the original filing on SEC.gov
Mar 16	Johanson David	SVP-Project Acquisition…	FTAX	2,057	$16.93	$34.8K	-1.7%	Open the original filing on SEC.gov
Mar 16	Johanson David	SVP-Project Acquisition…	AGRANT	8,444	—	—	+7.5%	Open the original filing on SEC.gov
Mar 16	Johanson David	SVP-Project Acquisition…	FTAX	1,029	$16.93	$17.4K	-0.9%	Open the original filing on SEC.gov
Mar 16	Johanson David	SVP-Project Acquisition…	FTAX	3,080	$16.93	$52.1K	-2.6%	Open the original filing on SEC.gov
Mar 16	Johanson David	SVP-Project Acquisition…	AGRANT	12,646	—	—	+12.1%	Open the original filing on SEC.gov
Mar 16	Johanson David	SVP-Project Acquisition…	FTAX	1,659	$16.93	$28.1K	-1.6%	Open the original filing on SEC.gov
Mar 16	Hanson William H	SVP, Market Development	FTAX	1,277	$16.93	$21.6K	-1.6%	Open the original filing on SEC.gov
Mar 16	Hanson William H	SVP, Market Development	AGRANT	5,242	—	—	+7.2%	Open the original filing on SEC.gov
Mar 16	Hanson William H	SVP, Market Development	FTAX	639	$16.93	$10.8K	-0.9%	Open the original filing on SEC.gov
Mar 16	Hanson William H	SVP, Market Development	FTAX	1,913	$16.93	$32.4K	-2.5%	Open the original filing on SEC.gov
Mar 16	Hanson William H	SVP, Market Development	AGRANT	7,853	—	—	+11.6%	Open the original filing on SEC.gov
Mar 16	Hanson William H	SVP, Market Development	FTAX	1,030	$16.93	$17.4K	-1.5%	Open the original filing on SEC.gov
Mar 16	Gunsten Christopher	SVP-Proj Svcs & Fleet…	FTAX	2,732	$16.93	$46.3K	-2.4%	Open the original filing on SEC.gov
Mar 16	Gunsten Christopher	SVP-Proj Svcs & Fleet…	AGRANT	8,444	—	—	+8.1%	Open the original filing on SEC.gov
Mar 16	Gunsten Christopher	SVP-Proj Svcs & Fleet…	FTAX	1,367	$16.93	$23.1K	-1.3%	Open the original filing on SEC.gov
Mar 16	Gunsten Christopher	SVP-Proj Svcs & Fleet…	FTAX	4,091	$16.93	$69.3K	-3.7%	Open the original filing on SEC.gov
Mar 16	Gunsten Christopher	SVP-Proj Svcs & Fleet…	AGRANT	12,646	—	—	+12.9%	Open the original filing on SEC.gov
Mar 16	Gunsten Christopher	SVP-Proj Svcs & Fleet…	FTAX	2,204	$16.93	$37.3K	-2.2%	Open the original filing on SEC.gov
Mar 16	Beyko Eleni	SVP - Offshore Energy	FTAX	3,188	$16.93	$54K	-2.3%	Open the original filing on SEC.gov
Mar 16	Beyko Eleni	SVP - Offshore Energy	AGRANT	9,852	—	—	+7.7%	Open the original filing on SEC.gov
Mar 16	Beyko Eleni	SVP - Offshore Energy	FTAX	1,939	$16.93	$32.8K	-1.5%	Open the original filing on SEC.gov
Mar 16	Beyko Eleni	SVP - Offshore Energy	FTAX	4,773	$16.93	$80.8K	-3.6%	Open the original filing on SEC.gov
Mar 16	Beyko Eleni	SVP - Offshore Energy	AGRANT	14,754	—	—	+12.4%	Open the original filing on SEC.gov
Mar 16	Beyko Eleni	SVP - Offshore Energy	FTAX	2,645	$16.93	$44.8K	-2.2%	Open the original filing on SEC.gov
Mar 16	Bayer Ryan	VP & CAO	FTAX	854	$16.93	$14.5K	-2.6%	Open the original filing on SEC.gov
Mar 16	Bayer Ryan	VP & CAO	AGRANT	2,170	—	—	+7.1%	Open the original filing on SEC.gov
Mar 16	Bayer Ryan	VP & CAO	FTAX	1,282	$16.93	$21.7K	-4.0%	Open the original filing on SEC.gov
Dec 31, 2025	Beyko Eleni	SVP - Offshore Energy	FTAX	8,088	$13.12	$106.1K	-6.0%	Open the original filing on SEC.gov
May 8, 2025	Hanson William H	SVP, Market Development	AGRANT↺	8,237	—	—	+13.6%	Open the original filing on SEC.gov
May 8, 2025	Johanson David	SVP-Project Acquisition…	AGRANT↺	13,179	—	—	+14.5%	Open the original filing on SEC.gov
May 8, 2025	Kornblau Scott Lee	SVP & CFO	AGRANT↺	25,058	—	—	+17.1%	Open the original filing on SEC.gov
May 8, 2025	Petterson Lasse	CEO & President	AGRANT↺	125,145	—	—	+12.1%	Open the original filing on SEC.gov
May 8, 2025	Schiffer Vivienne	SVP, CLO, CCO & Corp…	AGRANT↺	18,035	—	—	+28.1%	Open the original filing on SEC.gov
May 8, 2025	Gunsten Christopher	SVP-Proj Svcs & Fleet…	AGRANT↺	13,179	—	—	+18.1%	Open the original filing on SEC.gov
May 8, 2025	Beyko Eleni	SVP - Offshore Energy	AGRANT↺	15,376	—	—	+17.1%	Open the original filing on SEC.gov
May 8, 2025	Bayer Ryan	VP & CAO	AGRANT↺	10,126	—	—	+70.1%	Open the original filing on SEC.gov

UTENDR—

Schiffer Vivienne · SVP, CLO, CCO &…Apr 1

144,817 sh · -100.0% own

AGRANT—

Schiffer Vivienne · SVP, CLO, CCO &…Apr 1

28,945 sh · +25.0% own

UTENDR—

Petterson Lasse · CEO & PresidentApr 1

1.6M sh · -100.0% own

AGRANT—

Petterson Lasse · CEO & PresidentApr 1

206,445 sh · +15.2% own

UTENDR—

Kornblau Scott Lee · SVP & CFOApr 1

244,126.24 sh · -100.0% own

AGRANT—

Kornblau Scott Lee · SVP & CFOApr 1

90,518 sh · +58.9% own

UTENDR—

Johanson David · SVP-Project…Apr 1

191,597.52 sh · -100.0% own

AGRANT—

Johanson David · SVP-Project…Apr 1

71,860 sh · +60.0% own

UTENDR—

Hanson William H · SVP, Market…Apr 1

90,852.74 sh · -100.0% own

AGRANT—

Hanson William H · SVP, Market…Apr 1

13,631 sh · +17.6% own

DTOISS◆—

Steger Ronald · DirectorApr 1

45,068 sh

UTENDR—

Steger Ronald · DirectorApr 1

20,404 sh · -100.0% own

UTENDR—

Shipp Earl L · DirectorApr 1

42,619 sh · -100.0% own

UTENDR—

Shanahan Kathleen M · DirectorApr 1

76,375 sh · -100.0% own

UTENDR—

Gunsten Christopher · SVP-Proj Svcs &…Apr 1

182,496 sh · -100.0% own

AGRANT—

Gunsten Christopher · SVP-Proj Svcs &…Apr 1

71,860 sh · +65.0% own

DTOISS◆—

Dickerson Lawrence R · DirectorApr 1

76,962 sh

UTENDR—

Dickerson Lawrence R · DirectorApr 1

86,217 sh · -100.0% own

UTENDR—

Beyko Eleni · SVP - Offshore…Apr 1

151,312 sh · -100.0% own

AGRANT—

Beyko Eleni · SVP - Offshore…Apr 1

25,505 sh · +20.3% own

UTENDR—

Bayer Ryan · VP & CAOApr 1

37,380 sh · -100.0% own

AGRANT—

Bayer Ryan · VP & CAOApr 1

5,607 sh · +17.6% own

UTENDR—

Armstrong Dana A · DirectorApr 1

8,436 sh · -100.0% own

AGRANT◆—

Steger Ronald · DirectorMar 31

1,625 sh

DTOISS◆—

Shanahan Kathleen M · DirectorMar 31

10,336 sh

AGRANT◆—

Shanahan Kathleen M · DirectorMar 31

1,485 sh

AGRANT◆—

Dickerson Lawrence R · DirectorMar 31

2,938 sh

AGRANT$5.6K

Johanson David · SVP-Project…Mar 25

521.26 sh @ $10.82 · +0.4% own

FTAX$43.1K

Schiffer Vivienne · SVP, CLO, CCO &…Mar 16

2,546 sh @ $16.93 · -2.1% own

AGRANT—

Schiffer Vivienne · SVP, CLO, CCO &…Mar 16

10,454 sh · +9.7% own

FTAX$34.8K

Schiffer Vivienne · SVP, CLO, CCO &…Mar 16

2,058 sh @ $16.93 · -1.9% own

FTAX$58.6K

Schiffer Vivienne · SVP, CLO, CCO &…Mar 16

3,461 sh @ $16.93 · -3.0% own

AGRANT—

Schiffer Vivienne · SVP, CLO, CCO &…Mar 16

14,213 sh · +14.3% own

FTAX$34.9K

Schiffer Vivienne · SVP, CLO, CCO &…Mar 16

2,060 sh @ $16.93 · -2.0% own

FTAX$525.8K

Petterson Lasse · CEO & PresidentMar 16

31,057 sh @ $16.93 · -2.2% own

AGRANT—

Petterson Lasse · CEO & PresidentMar 16

78,924 sh · +6.0% own

FTAX$262.9K

Petterson Lasse · CEO & PresidentMar 16

15,529 sh @ $16.93 · -1.2% own

FTAX$339.2K

Petterson Lasse · CEO & PresidentMar 16

20,033 sh @ $16.93 · -1.5% own

FTAX$629.8K

Petterson Lasse · CEO & PresidentMar 16

37,202 sh @ $16.93 · -2.7% own

AGRANT—

Petterson Lasse · CEO & PresidentMar 16

94,540 sh · +7.3% own

FTAX$99.1K

Kornblau Scott Lee · SVP & CFOMar 16

5,851 sh @ $16.93 · -3.7% own

AGRANT—

Kornblau Scott Lee · SVP & CFOMar 16

14,868 sh · +10.3% own

FTAX$49.5K

Kornblau Scott Lee · SVP & CFOMar 16

2,926 sh @ $16.93 · -2.0% own

FTAX$148.3K

Kornblau Scott Lee · SVP & CFOMar 16

8,762 sh @ $16.93 · -5.6% own

AGRANT—

Kornblau Scott Lee · SVP & CFOMar 16

22,265 sh · +16.6% own

FTAX$79.9K

Kornblau Scott Lee · SVP & CFOMar 16

4,719 sh @ $16.93 · -3.4% own

FTAX$34.8K

Johanson David · SVP-Project…Mar 16

2,057 sh @ $16.93 · -1.7% own

AGRANT—

Johanson David · SVP-Project…Mar 16

8,444 sh · +7.5% own

FTAX$17.4K

Johanson David · SVP-Project…Mar 16

1,029 sh @ $16.93 · -0.9% own

FTAX$52.1K

Johanson David · SVP-Project…Mar 16

3,080 sh @ $16.93 · -2.6% own

AGRANT—

Johanson David · SVP-Project…Mar 16

12,646 sh · +12.1% own

FTAX$28.1K

Johanson David · SVP-Project…Mar 16

1,659 sh @ $16.93 · -1.6% own

FTAX$21.6K

Hanson William H · SVP, Market…Mar 16

1,277 sh @ $16.93 · -1.6% own

AGRANT—

Hanson William H · SVP, Market…Mar 16

5,242 sh · +7.2% own

FTAX$10.8K

Hanson William H · SVP, Market…Mar 16

639 sh @ $16.93 · -0.9% own

FTAX$32.4K

Hanson William H · SVP, Market…Mar 16

1,913 sh @ $16.93 · -2.5% own

AGRANT—

Hanson William H · SVP, Market…Mar 16

7,853 sh · +11.6% own

FTAX$17.4K

Hanson William H · SVP, Market…Mar 16

1,030 sh @ $16.93 · -1.5% own

FTAX$46.3K

Gunsten Christopher · SVP-Proj Svcs &…Mar 16

2,732 sh @ $16.93 · -2.4% own

AGRANT—

Gunsten Christopher · SVP-Proj Svcs &…Mar 16

8,444 sh · +8.1% own

FTAX$23.1K

Gunsten Christopher · SVP-Proj Svcs &…Mar 16

1,367 sh @ $16.93 · -1.3% own

FTAX$69.3K

Gunsten Christopher · SVP-Proj Svcs &…Mar 16

4,091 sh @ $16.93 · -3.7% own

AGRANT—

Gunsten Christopher · SVP-Proj Svcs &…Mar 16

12,646 sh · +12.9% own

FTAX$37.3K

Gunsten Christopher · SVP-Proj Svcs &…Mar 16

2,204 sh @ $16.93 · -2.2% own

FTAX$54K