According to its website, Susquehanna took shape in the early 1980s, when a group of friends from college began trading independently on the floor of the Philadelphia Stock Exchange. Now the securities trading and services group is a global entity with Irish subsidiaries and a presence in Dublin’s IFSC — a very successful presence, as highlighted in legal proceedings brought by the group back in 2021. Flash trading and espionage claims aside, Susquehanna has also been engaged in a long-running tax dispute with Revenue, one that has finally come to an end with Justice Brian O’Moore of the High Court…

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