Kuoni

May: Zurich-based travel group in turmoil as board moves to oust chairman and CEO

Roche

May: Swiss investor Martin Ebner, failing to secure seat on Roche board, sells his 20% stake to rival Novartis

Sulzer

April: Takeover bid fails for troubled $3.3 billion industrial conglomerate

SAirGroup

March: Parent of Swissair announces record $1.7 billion in annual losses

Data: BusinessWeek

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