NEWARK, Calif. & LAUSANNE, Switzerland--(BUSINESS WIRE)--Logitech International (SIX:LOGN) (Nasdaq:LOGI) today announced preliminary financial results for the fourth quarter and full year of Fiscal Year 2015. Q4 closed a strong fiscal year with better-than-expected sales of $467 million – up 1 percent in constant currency – and GAAP operating income of $12 million, with non-GAAP operating income of $14 million. For the full Fiscal Year 2015, ended March 31, 2015: Sales were $2.11 billion, down