Benzinga's Top #PreMarket Losers

PTC Therapeutics

shares fell 20.29% to $20.90 in the pre-market trading after the company reported that the CHMP of the EMA has adopted a negative opinion on its MAA for conditional approval of ataluren for the treatment of nmDMD. The company also named Robert J. Spiegel to Chief Medical Officer. International Game Technology

dipped 10.48% to $15.80 in the pre-market session after the company reported downbeat fiscal first-quarter results. Intuitive Surgical

shares dropped 5.92% to $413.00 in pre-market trading despite beating on the bottom and top lines. The company also projected to sell fewer systems in 2014. BlackBerry

dipped 4.41% to $9.99 after falling 3.06% on Thursday.