| 04/30/2026 9:41 AM | Great Lakes Dredge & Dock (1372020) Subject VANGUARD CAPITAL MANAGEMENT LLC (2100119) Filed by | Form SCHEDULE 13G | |
| 04/28/2026 3:34 PM | BlackRock, Inc. (2012383) Filed by Great Lakes Dredge & Dock (1372020) Subject | Form SCHEDULE 13G/A | |
| 04/13/2026 2:28 PM | Great Lakes Dredge & Dock (1372020) Filer | Form 15-12G | |
| 04/09/2026 12:42 PM | DIMENSIONAL FUND ADVISORS LP (354204) Filed by Great Lakes Dredge & Dock (1372020) Subject | Form SCHEDULE 13G/A | |
| 04/02/2026 11:15 PM | Great Lakes Dredge & Dock (1372020) Filer | Form EFFECT | |
| 04/01/2026 3:28 PM | Great Lakes Dredge & Dock (1372020) Issuer Kornblau Scott Lee (1724302) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 04/01/2026 3:31 PM | Great Lakes Dredge & Dock (1372020) Issuer Petterson Lasse (1455941) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 04/01/2026 3:33 PM | Great Lakes Dredge & Dock (1372020) Issuer Schiffer Vivienne (1835547) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 04/01/2026 3:17 PM | Great Lakes Dredge & Dock (1372020) Issuer GUNSTEN CHRISTOPHER (1939594) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 04/01/2026 3:21 PM | Great Lakes Dredge & Dock (1372020) Issuer HANSON WILLIAM H (1808410) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 04/01/2026 3:24 PM | Great Lakes Dredge & Dock (1372020) Issuer JOHANSON DAVID (1940445) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
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| 04/01/2026 3:09 PM | BAYER RYAN (1990270) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 04/01/2026 1:00 PM | Great Lakes Dredge & Dock (1372020) Filer | Form POS AM | |
| 04/01/2026 1:04 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 POS | |
| 04/01/2026 1:05 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 POS | |
| 04/01/2026 1:07 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 POS | |
| 04/01/2026 1:09 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 POS | |
| 04/01/2026 1:10 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 POS | |
| 04/01/2026 1:11 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 POS | |
| 04/01/2026 11:23 AM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 04/01/2026 8:01 AM | Great Lakes Dredge & Dock (1372020) Subject Saltchuk Resources, Inc. (1806446) Filed by | Form SC TO-T/A | |
| 04/01/2026 8:11 AM | Great Lakes Dredge & Dock (1372020) Subject Nasdaq Stock Market LLC (1354457) Filed by | Form 25-NSE | |
| 04/01/2026 8:16 AM | Great Lakes Dredge & Dock (1372020) Subject | Form SC 14D9/A | |
| 03/27/2026 4:28 PM | Great Lakes Dredge & Dock (1372020) Subject | Form SC 14D9/A | |
| 03/27/2026 8:35 AM | Great Lakes Dredge & Dock (1372020) Subject VANGUARD GROUP INC (102909) Filed by | Form SCHEDULE 13G/A | |
| 03/25/2026 4:14 PM | BAYER RYAN (1990270) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4/A | |
| 03/25/2026 4:18 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 03/25/2026 4:02 PM | Great Lakes Dredge & Dock (1372020) Issuer HANSON WILLIAM H (1808410) Reporting | Form 4/A | |
| 03/25/2026 4:08 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4/A | |
| 03/25/2026 3:58 PM | Great Lakes Dredge & Dock (1372020) Issuer JOHANSON DAVID (1940445) Reporting | Form 4/A | |
| 03/25/2026 3:40 PM | Great Lakes Dredge & Dock (1372020) Issuer Petterson Lasse (1455941) Reporting | Form 4/A | |
| 03/25/2026 3:48 PM | Great Lakes Dredge & Dock (1372020) Issuer Kornblau Scott Lee (1724302) Reporting | Form 4/A | |
| 03/25/2026 3:53 PM | Great Lakes Dredge & Dock (1372020) Issuer GUNSTEN CHRISTOPHER (1939594) Reporting | Form 4/A | |
| 03/25/2026 3:36 PM | Great Lakes Dredge & Dock (1372020) Issuer Schiffer Vivienne (1835547) Reporting | Form 4/A | |
| 03/23/2026 4:15 PM | Great Lakes Dredge & Dock (1372020) Subject | Form SC 14D9/A | |
| 03/23/2026 3:12 PM | Great Lakes Dredge & Dock (1372020) Subject Saltchuk Resources, Inc. (1806446) Filed by | Form SC TO-T/A | |
| 03/20/2026 4:29 PM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 03/18/2026 4:10 PM | Great Lakes Dredge & Dock (1372020) Issuer Petterson Lasse (1455941) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 03/18/2026 4:06 PM | Great Lakes Dredge & Dock (1372020) Issuer Kornblau Scott Lee (1724302) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 03/18/2026 3:51 PM | Great Lakes Dredge & Dock (1372020) Issuer GUNSTEN CHRISTOPHER (1939594) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 03/18/2026 3:44 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
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| 03/18/2026 3:39 PM | BAYER RYAN (1990270) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 03/18/2026 3:21 PM | Great Lakes Dredge & Dock (1372020) Subject | Form SC 14D9/A | |
| 03/18/2026 8:23 AM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 03/13/2026 3:35 PM | Great Lakes Dredge & Dock (1372020) Subject | Form SC 14D9/A | |
| 02/25/2026 3:41 PM | Great Lakes Dredge & Dock (1372020) Issuer HANSON WILLIAM H (1808410) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 02/25/2026 3:44 PM | Great Lakes Dredge & Dock (1372020) Issuer JOHANSON DAVID (1940445) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 02/25/2026 3:51 PM | Great Lakes Dredge & Dock (1372020) Issuer GUNSTEN CHRISTOPHER (1939594) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 02/25/2026 3:30 PM | BAYER RYAN (1990270) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 02/23/2026 3:10 PM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 02/11/2026 6:37 AM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 01/05/2026 5:02 PM | Great Lakes Dredge & Dock (1372020) Issuer Shipp Earl L (1721123) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 01/05/2026 5:08 PM | DICKERSON LAWRENCE R (1249072) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 01/05/2026 5:12 PM | Great Lakes Dredge & Dock (1372020) Issuer Steger Ronald (1616560) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 01/05/2026 5:15 PM | Great Lakes Dredge & Dock (1372020) Issuer Shanahan Kathleen M (1292085) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 01/05/2026 4:52 PM | Armstrong Dana A (1907154) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 12/10/2025 4:21 PM | Great Lakes Dredge & Dock (1372020) Subject JOHANSON DAVID (1940445) Reporting | Form 144 Notice of proposed sale of securities pursuant to Rule 144 | |
| 12/04/2025 4:17 PM | Great Lakes Dredge & Dock (1372020) Issuer JOHANSON DAVID (1940445) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 12/03/2025 3:56 PM | Great Lakes Dredge & Dock (1372020) Subject JOHANSON DAVID (1940445) Reporting | Form 144 Notice of proposed sale of securities pursuant to Rule 144 | |
| 11/07/2025 1:10 PM | Great Lakes Dredge & Dock (1372020) Subject PRUDENTIAL FINANCIAL INC (1137774) Filed by | Form SCHEDULE 13G/A | |
| 11/05/2025 12:27 PM | Great Lakes Dredge & Dock (1372020) Subject JENNISON ASSOCIATES LLC (53417) Filed by | Form SCHEDULE 13G/A | |
| 11/04/2025 3:00 PM | Great Lakes Dredge & Dock (1372020) Filer | Form 10-Q General form for quarterly reports under Section 13 or 15(d) | |
| 11/04/2025 7:20 AM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 10/27/2025 3:11 PM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 10/01/2025 4:46 PM | Great Lakes Dredge & Dock (1372020) Issuer Steger Ronald (1616560) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 10/01/2025 4:02 PM | Great Lakes Dredge & Dock (1372020) Issuer Shanahan Kathleen M (1292085) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 10/01/2025 4:07 PM | Great Lakes Dredge & Dock (1372020) Issuer Shipp Earl L (1721123) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 10/01/2025 3:45 PM | Armstrong Dana A (1907154) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 08/13/2025 4:17 PM | Great Lakes Dredge & Dock (1372020) Issuer Kornblau Scott Lee (1724302) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 08/11/2025 3:30 PM | Great Lakes Dredge & Dock (1372020) Subject Kornblau Scott Lee (1724302) Reporting | Form 144 Notice of proposed sale of securities pursuant to Rule 144 | |
| 08/05/2025 3:00 PM | Great Lakes Dredge & Dock (1372020) Filer | Form 10-Q General form for quarterly reports under Section 13 or 15(d) | |
| 08/05/2025 7:44 AM | Great Lakes Dredge & Dock (1372020) Filer | Form 8-K Current report pursuant to Section 13 or 15(d) | |
| 07/01/2025 4:09 PM | DICKERSON LAWRENCE R (1249072) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 07/01/2025 4:13 PM | Great Lakes Dredge & Dock (1372020) Issuer Shanahan Kathleen M (1292085) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 07/01/2025 4:16 PM | Great Lakes Dredge & Dock (1372020) Issuer Shipp Earl L (1721123) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 07/01/2025 4:21 PM | Great Lakes Dredge & Dock (1372020) Issuer Steger Ronald (1616560) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/15/2025 4:48 PM | Great Lakes Dredge & Dock (1372020) Subject PRUDENTIAL FINANCIAL INC (1137774) Filed by | Form SCHEDULE 13G/A | |
| 05/12/2025 5:14 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:28 PM | BAYER RYAN (1990270) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:33 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:38 PM | Great Lakes Dredge & Dock (1372020) Issuer HANSON WILLIAM H (1808410) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:41 PM | Great Lakes Dredge & Dock (1372020) Issuer JOHANSON DAVID (1940445) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:46 PM | Great Lakes Dredge & Dock (1372020) Issuer GUNSTEN CHRISTOPHER (1939594) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:51 PM | Great Lakes Dredge & Dock (1372020) Issuer Schiffer Vivienne (1835547) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:54 PM | Great Lakes Dredge & Dock (1372020) Issuer Kornblau Scott Lee (1724302) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/12/2025 4:57 PM | Great Lakes Dredge & Dock (1372020) Issuer Petterson Lasse (1455941) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/09/2025 11:14 AM | Great Lakes Dredge & Dock (1372020) Subject JENNISON ASSOCIATES LLC (53417) Filed by | Form SCHEDULE 13G/A | |
| 05/08/2025 4:29 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans | |
| 05/08/2025 4:30 PM | Great Lakes Dredge & Dock (1372020) Filer | Form S-8 Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans | |
| 05/08/2025 4:43 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/07/2025 4:44 PM | Great Lakes Dredge & Dock (1372020) Issuer Kornblau Scott Lee (1724302) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
|
| 05/07/2025 4:49 PM | Great Lakes Dredge & Dock (1372020) Issuer Petterson Lasse (1455941) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/07/2025 4:53 PM | Great Lakes Dredge & Dock (1372020) Issuer Schiffer Vivienne (1835547) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/07/2025 4:27 PM | BEYKO ELENI (1929993) Reporting Great Lakes Dredge & Dock (1372020) Issuer | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/07/2025 4:31 PM | Great Lakes Dredge & Dock (1372020) Issuer GUNSTEN CHRISTOPHER (1939594) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/07/2025 4:35 PM | Great Lakes Dredge & Dock (1372020) Issuer HANSON WILLIAM H (1808410) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |
| 05/07/2025 4:40 PM | Great Lakes Dredge & Dock (1372020) Issuer JOHANSON DAVID (1940445) Reporting | Form 4 Statement of changes in beneficial ownership of securities | |