JOHANSON DAVID

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	Company	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value
2025-12-12	2025-12-10	Great Lakes Dredge & Dock Corp (GLDD)	PlS Planned sale	43,193 +15.6% 75.61 US$155,178	43,193 +15.6%	75.61	US$155,178
2025-12-10	2025-12-10	Great Lakes Dredge & Dock Corp (GLDD)	PrS Proposed sale	95,377 90.03 US$1,545,345	95,377	90.03	US$1,545,345
2025-12-04	2025-12-03	Great Lakes Dredge & Dock Corp (GLDD)	PlS Planned sale	40,899 +17.2% 332.85 US$2,171,580	40,899 +17.2%	332.85	US$2,171,580
2025-12-03	2025-12-03	Great Lakes Dredge & Dock Corp (GLDD)	PrS Proposed sale	10,000 13.01 US$130,122	10,000	13.01	US$130,122