Full coverage: Susquehanna

The Court of Appeal has rejected the trading giant’s appeal in relation to tax relief following a long-running battle with the Revenue Commissioners.

Between 2010 and 2012, international trader Susquehanna tried to claim tax relief on group losses. In the face of Revenue opposition, it won its case — and then lost it.

Global trader Susquehanna is suing a UK recruiter claiming it engaged in "industrial espionage" on behalf of rival trader Citadel so it could set up a "ready made" operation in Dublin. Belated efforts to join Citadel to the case have come a cropper.

Flash trading giant Susquehanna is alleging that a UK recruitment firm elicited confidential and proprietary information from several Irish staff and handed over the information to rival Citadel. Affidavits, filings and reports reveal both sides of the story.

IFSC global securities trading company Susquehanna is embroiled in a multi-million tax battle with the Revenue Commissioners. "This is not a case of getting tax relief twice. There is no abuse going on here," lawyers for the US-owned operator claim.