Great Lakes Dredge & Dock Corporation

GLDDNASDAQIndustrials

$17.00

+$0.00(+0.00%)

Market Cap$1.1B

P/E Ratio—

52W High$17.02

52W Low$7.51

Avg Volume1.8M

Open$17.00

Beta1.37

Insider Trades Ownership Employees

Great Lakes Dredge & Dock Corporation (GLDD) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · GLDD · as of Jun 8, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

0.00

Buy/Sell (by trades)

Overall sentiment

BEARISH

↑ Buy 0%Active transactions only · RSU vesting excluded100% Sell ↓

Great Lakes Dredge & Dock Corporation insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 8, 2026

GLDD insider buying and selling by quarter

GLDD insider selling · GLDD insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

3.0M1.5M0

2024 Q3

2024 Q4

2025 Q1

2025 Q2

2025 Q3

2025 Q4

2026 Q1

2026 Q2

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 8, 2026

Active insiders

Most active in past 12 months · GLDD ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

GLDD executive sell shares · GLDD board member insider trading · GLDD insider trading SEC filing

Showing 85 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Apr 1, 2026	Schiffer Vivienne SVP, CLO, CCO & Corp Secretary	Award	28,945	—	—	144,817	Form 4
Apr 1, 2026	Schiffer Vivienne SVP, CLO, CCO & Corp Secretary	Other	144,817	—	—	0	Form 4
Apr 1, 2026	Petterson Lasse CEO & President · Director	Award	206,445	—	—	1,568,290.29	Form 4
Apr 1, 2026	Petterson Lasse CEO & President · Director	Other	1,568,290.29	—	—	0	Form 4
Apr 1, 2026	Kornblau Scott Lee SVP & CFO	Award	90,518	—	—	244,126.24	Form 4
Apr 1, 2026	Kornblau Scott Lee SVP & CFO	Other	244,126.24	—	—	0	Form 4
Apr 1, 2026	JOHANSON DAVID SVP-Project Acquisition & Ops	Award	71,860	—	—	191,597.516	Form 4
Mar 25, 2026	JOHANSON DAVID SVP-Project Acquisition & Ops	Award	521.257	$10.82	$6K	119,737.516	Form 4
Apr 1, 2026	JOHANSON DAVID SVP-Project Acquisition & Ops	Other	191,597.516	—	—	0	Form 4
Apr 1, 2026	HANSON WILLIAM H SVP, Market Development	Award	13,631	—	—	90,852.743	Form 4
Apr 1, 2026	HANSON WILLIAM H SVP, Market Development	Other	90,852.743	—	—	0	Form 4
Apr 1, 2026	GUNSTEN CHRISTOPHER SVP-Proj Svcs & Fleet Engineer	Award	71,860	—	—	182,496	Form 4
Apr 1, 2026	GUNSTEN CHRISTOPHER SVP-Proj Svcs & Fleet Engineer	Other	182,496	—	—	0	Form 4
Apr 1, 2026	BEYKO ELENI SVP - Offshore Energy	Award	25,505	—	—	151,312	Form 4
Apr 1, 2026	BEYKO ELENI SVP - Offshore Energy	Other	151,312	—	—	0	Form 4
Apr 1, 2026	BAYER RYAN VP & CAO	Award	5,607	—	—	37,380	Form 4
Apr 1, 2026	BAYER RYAN VP & CAO	Other	37,380	—	—	0	Form 4
Apr 1, 2026	Steger Ronald Director	Other	20,404	—	—	0	Form 4
Apr 1, 2026	Shipp Earl L Director	Other	42,619	—	—	0	Form 4
Apr 1, 2026	Shanahan Kathleen M Director	Other	76,375	—	—	0	Form 4
Apr 1, 2026	DICKERSON LAWRENCE R Director	Other	86,217	—	—	0	Form 4
Apr 1, 2026	Armstrong Dana A Director	Other	8,436	—	—	0	Form 4
Dec 31, 2025	BEYKO ELENI SVP - Offshore Energy	Other	8,088	$13.12	$106K	125,807	Form 4
Mar 16, 2026	Schiffer Vivienne SVP, CLO, CCO & Corp Secretary	Award	10,454	—	—	118,418	Form 4
Mar 16, 2026	Schiffer Vivienne SVP, CLO, CCO & Corp Secretary	Other	2,546	$16.93	$43K	115,872	Form 4

Schiffer Vivienne

SVP, CLO, CCO & Corp Secretary

Award

Date

Apr 1

28,945

Price

—

Value

—

View Form 4 on SEC.gov

Schiffer Vivienne

SVP, CLO, CCO & Corp Secretary

Other

Date

Apr 1

144,817

Price

—

Value

—

View Form 4 on SEC.gov

Petterson Lasse

CEO & President · Director

Award

Date

Apr 1

206,445

Price

—

Value

—

View Form 4 on SEC.gov

Petterson Lasse

CEO & President · Director

Other

Date

Apr 1

1,568,290.29

Price

—

Value

—

View Form 4 on SEC.gov

Kornblau Scott Lee

SVP & CFO

Award

Date

Apr 1

90,518

Price

—

Value

—

View Form 4 on SEC.gov

Kornblau Scott Lee

SVP & CFO

Other

Date

Apr 1

244,126.24

Price

—

Value

—

View Form 4 on SEC.gov

JOHANSON DAVID

SVP-Project Acquisition & Ops

Award

Date

Apr 1

71,860

Price

—

Value

—

View Form 4 on SEC.gov

JOHANSON DAVID

SVP-Project Acquisition & Ops

Award

Date

Mar 25

521.257

Price

$10.82

Value

$6K

View Form 4 on SEC.gov

JOHANSON DAVID

SVP-Project Acquisition & Ops

Other

Date

Apr 1

191,597.516

Price

—

Value

—

View Form 4 on SEC.gov

HANSON WILLIAM H

SVP, Market Development

Award

Date

Apr 1

13,631

Price

—

Value

—

View Form 4 on SEC.gov

HANSON WILLIAM H

SVP, Market Development

Other

Date

Apr 1

90,852.743

Price

—

Value

—

View Form 4 on SEC.gov

GUNSTEN CHRISTOPHER

SVP-Proj Svcs & Fleet Engineer

Award

Date

Apr 1

71,860

Price

—

Value

—

View Form 4 on SEC.gov

GUNSTEN CHRISTOPHER

SVP-Proj Svcs & Fleet Engineer

Other

Date

Apr 1

182,496

Price

—

Value

—

View Form 4 on SEC.gov

BEYKO ELENI

SVP - Offshore Energy

Award

Date

Apr 1

25,505

Price

—

Value

—

View Form 4 on SEC.gov

BEYKO ELENI

SVP - Offshore Energy

Other

Date

Apr 1

151,312

Price

—

Value

—

View Form 4 on SEC.gov

BAYER RYAN

VP & CAO

Award

Date

Apr 1

5,607

Price

—

Value

—

View Form 4 on SEC.gov

BAYER RYAN

VP & CAO

Other

Date

Apr 1

37,380

Price

—

Value

—

View Form 4 on SEC.gov

Steger Ronald

Director

Other

Date

Apr 1

20,404

Price

—

Value

—

View Form 4 on SEC.gov

Shipp Earl L

Director

Other

Date

Apr 1

42,619

Price

—

Value

—

View Form 4 on SEC.gov

Shanahan Kathleen M

Director

Other

Date

Apr 1

76,375

Price

—

Value

—

View Form 4 on SEC.gov

DICKERSON LAWRENCE R

Director

Other

Date

Apr 1

86,217

Price

—

Value

—

View Form 4 on SEC.gov

Armstrong Dana A

Director

Other

Date

Apr 1

8,436

Price

—

Value

—

View Form 4 on SEC.gov

BEYKO ELENI

SVP - Offshore Energy

Other

Date

Dec 31

8,088

Price

$13.12

Value

$106K

View Form 4 on SEC.gov

Schiffer Vivienne

SVP, CLO, CCO & Corp Secretary

Award

Date

Mar 16

10,454

Price

—

Value

—

View Form 4 on SEC.gov

Schiffer Vivienne

SVP, CLO, CCO & Corp Secretary

Other

Date

Mar 16

2,546

Price

$16.93

Value

$43K

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 4

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About GLDD insider trading

GLDD insider trades

Great Lakes Dredge & Dock Corporation (GLDD) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including JOHANSON DAVID (SVP-Project Acquisition & Ops), Kornblau Scott Lee (SVP & CFO), BEYKO ELENI (SVP - Offshore Energy). Over the past 12 months, 5 insiders have filed transactions with the SEC. GLDD insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Great Lakes Dredge & Dock Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

GLDD insider trading · 5 questions

The insiders of Great Lakes Dredge & Dock Corporation (GLDD) include executives and directors such as JOHANSON DAVID (SVP-Project Acquisition & Ops), Kornblau Scott Lee (SVP & CFO), BEYKO ELENI (SVP - Offshore Energy), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

GLDD board member insider tradingwho are GLDD insidersGLDD insider rosterGreat Lakes Dredge & Dock Corporation executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026