Great Lakes Dredge & Dock Corporation (GLDD) has 20 known insider and institutional holders on record. The largest holder is Petterson Lasse with 1,313,978 shares. Other notable holders include Berger Jonathan W and Leight Nathan.
Over the last 12 months, insiders have made 72 transactions in GLDD stock — 35 buys (valued at $5.64K) and 5 sells (valued at $1.14M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
GLDD Insider Ownership
Top Holder
Petterson Lasse
1,313,978 shares
Buys (12 mo)
35
$5.64K value
Sells (12 mo)
5
$1.14M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Petterson Lasse |
CEO & President |
1,313,978 |
2026-03-18 |
|
| 2 |
Berger Jonathan W |
CEO |
515,567 |
2016-03-17 |
|
| 3 |
Leight Nathan |
Director |
275,497 |
2015-10-01 |
|
| 4 |
Simonelli David E |
Chief Operating Officer |
248,107 |
2022-06-10 |
|
| 5 |
Marinko Mark W. |
Chief Financial Officer |
223,774 |
2021-03-16 |
|
| 6 |
Johnson Kyle D |
Executive VP & COO |
175,568 |
2017-03-10 |
|
| 7 |
Shea Christopher P |
President - E&i Division |
160,915 |
2018-03-12 |
|
| 8 |
Albert Carl A |
Director |
141,798 |
2019-04-02 |
|
| 9 |
Deutsch Peter |
Director |
137,578 |
2017-04-04 |
|
| 10 |
Kornblau Scott Lee |
SVP & CFO |
134,014 |
2026-03-18 |
|
| 11 |
Uhler Robert B |
Director |
131,007 |
2018-04-02 |
|
| 12 |
Lavoy Kathleen Mackie |
SVP & Chief Legal Officer |
129,258 |
2020-03-16 |
|
| 13 |
Beyko Eleni |
SVP - Offshore Energy |
125,807 |
2026-03-25 |
|
| 14 |
Weiss Jason |
Director |
125,363 |
2018-04-02 |
|
| 15 |
Johanson David |
SVP-project Acquisition & Ops |
119,738 |
2026-04-01 |
|
| 16 |
Levenson Ryan |
Director |
119,072 |
2024-04-01 |
|
| 17 |
Mackie Douglas B |
Director |
99,648 |
2014-04-02 |
|
| 18 |
Schiffer Vivienne |
SVP, CLO, Cco & Corp Secretary |
99,270 |
2026-03-18 |
|
| 19 |
Gunsten Christopher |
SVP-proj Svcs & Fleet Engineer |
97,736 |
2026-03-18 |
|
| 20 |
Walsh Michael Joseph |
Director |
91,355 |
2020-04-02 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-01 |
Bayer Ryan |
VP & CAO |
Tender Offer (Sell) |
37,380 |
- |
- |
| 2026-04-01 |
Johanson David |
SVP-project Acquisition & Ops |
Tender Offer (Sell) |
191,598 |
- |
- |
| 2026-03-25 |
Johanson David |
SVP-project Acquisition & Ops |
RSU Award |
521 |
$10.82 |
$5.64K |
| 2026-04-01 |
Gunsten Christopher |
SVP-proj Svcs & Fleet Engineer |
Tender Offer (Sell) |
182,496 |
- |
- |
| 2026-04-01 |
Beyko Eleni |
SVP - Offshore Energy |
Tender Offer (Sell) |
151,312 |
- |
- |
| 2026-04-01 |
Armstrong Dana A |
Director |
Tender Offer (Sell) |
8,436 |
- |
- |
| 2026-04-01 |
Schiffer Vivienne |
SVP, CLO, Cco & Corp Secretary |
Tender Offer (Sell) |
144,817 |
- |
- |
| 2026-04-01 |
Hanson William H |
SVP, Market Development |
Tender Offer (Sell) |
90,853 |
- |
- |
| 2026-04-01 |
Kornblau Scott Lee |
SVP & CFO |
Tender Offer (Sell) |
244,126 |
- |
- |
| 2026-04-01 |
Shipp Earl L |
Director |
Tender Offer (Sell) |
42,619 |
- |
- |
| 2026-04-01 |
Steger Ronald |
Director |
Return of Shares |
45,068 |
$17.00 |
$766.16K |
| 2026-03-31 |
Steger Ronald |
Director |
RSU Award |
1,625 |
- |
- |
| 2026-04-01 |
Petterson Lasse |
CEO & President |
Tender Offer (Sell) |
1,568,290 |
- |
- |
| 2026-04-01 |
Shanahan Kathleen M |
Director |
Tender Offer (Sell) |
76,375 |
- |
- |
| 2026-03-31 |
Shanahan Kathleen M |
Director |
Return of Shares |
10,336 |
$17.00 |
$175.71K |
| 2026-04-01 |
Dickerson Lawrence R |
Director |
Return of Shares |
76,962 |
$17.00 |
$1.31M |
| 2026-03-31 |
Dickerson Lawrence R |
Director |
RSU Award |
2,938 |
- |
- |
| 2025-12-31 |
Beyko Eleni |
SVP - Offshore Energy |
Tax Withholding of RSU |
8,088 |
$13.12 |
$106.11K |
| 2026-03-16 |
Bayer Ryan |
VP & CAO |
Tax Withholding of RSU |
1,282 |
$16.93 |
$21.7K |
| 2026-03-16 |
Johanson David |
SVP-project Acquisition & Ops |
Tax Withholding of RSU |
1,659 |
$16.93 |
$28.09K |
| 2026-03-16 |
Gunsten Christopher |
SVP-proj Svcs & Fleet Engineer |
Tax Withholding of RSU |
2,204 |
$16.93 |
$37.31K |
| 2026-03-16 |
Beyko Eleni |
SVP - Offshore Energy |
Tax Withholding of RSU |
2,645 |
$16.93 |
$44.78K |
| 2026-03-16 |
Schiffer Vivienne |
SVP, CLO, Cco & Corp Secretary |
Tax Withholding of RSU |
2,060 |
$16.93 |
$34.88K |
| 2026-03-16 |
Hanson William H |
SVP, Market Development |
Tax Withholding of RSU |
1,030 |
$16.93 |
$17.44K |
| 2026-03-16 |
Kornblau Scott Lee |
SVP & CFO |
Tax Withholding of RSU |
4,719 |
$16.93 |
$79.89K |
