Great Lakes Dredge & Dock CORP 4 SEC Filings

Received 521.257 shares as a grant or award ($5.64K) · Received 71,860 shares as a grant or award · Disposed of 191,597.5164 shares (Tender Offer)

Received 13,631 shares as a grant or award · Disposed of 90,852.743 shares (Tender Offer)

Received 71,860 shares as a grant or award · Disposed of 182,496 shares (Tender Offer)

Received 25,505 shares as a grant or award · Disposed of 151,312 shares (Tender Offer)

Granted 1,625 Deferred Stock Units · Disposed of 20,404 shares (Tender Offer) · Disposed of 45,068 Deferred Stock Units (Disposition to Issuer)

Received 5,607 shares as a grant or award · Disposed of 37,380 shares (Tender Offer)

Received 28,945 shares as a grant or award · Disposed of 144,817 shares (Tender Offer)

Received 206,445 shares as a grant or award · Disposed of 1,568,290.29 shares (Tender Offer)

Received 90,518 shares as a grant or award · Disposed of 244,126.24 shares (Tender Offer)

Disposed of 42,619 shares (Tender Offer)

Granted 1,485 Deferred Stock Units · Disposed of 10,336 Deferred Stock Units (Disposition to Issuer) · Disposed of 76,375 shares (Tender Offer)

Granted 2,938 Deferred Stock Units · Disposed of 86,217 shares (Tender Offer) · Disposed of 76,962 Deferred Stock Units (Disposition to Issuer)

Disposed of 8,436 shares (Tender Offer)

Gave up 8,088 shares to cover exercise price or tax ($106K)

Gave up 10,125 shares to cover exercise price or tax ($171K) · Received 24,667 shares as a grant or award

Received 173,464 shares as a grant or award · Gave up 103,821 shares to cover exercise price or tax ($1.76M)

Gave up 22,258 shares to cover exercise price or tax ($377K) · Received 37,133 shares as a grant or award

Gave up 7,825 shares to cover exercise price or tax ($132K) · Received 21,090 shares as a grant or award

Gave up 4,859 shares to cover exercise price or tax ($82.3K) · Received 13,095 shares as a grant or award

Gave up 10,394 shares to cover exercise price or tax ($176K) · Received 21,090 shares as a grant or award