Mentioned over the weekend already in the comments. Last friday the news was shared by SIX Swiss Exchange the membership of Tibra Trading Europe will end on October 31th 2013 (pdf) . This means they’re leaving the market making in Swiss equity options.
The firm is closing down desks one by one. Rumor has it all US desks will close, only one or two people will stay to keep a legal entity. European market making in single stocks has been terminated altogether.
High speed trading meets low speed courts
As this Australian magazine notes in the conflict with Optiver, High speed trading meets low-speed courts. Not impossible Tibra will fold before the court reaches a final decision.