X0101 EFFECT 33 LIVE 2020-10-29 16:00:00

S-3

0001031623 GULF ISLAND FABRICATION INC 333-249560 0001828793 Gulf Island Services, L.L.C. 333-249560-03 0001828792 Gulf Island Shipyards, LLC 333-249560-02 0001828794 Gulf Island, L.L.C. 333-249560-01