Benzinga's Top #PreMarket Losers

Finisar

dipped 21.94% to $19.71 in pre-market trading after the company reported downbeat earnings for the fourth quarter and issued a weak profit forecast for the current quarter. Sierra Wireless

dropped 4.62% to $19.18 in pre-market trading after falling 0.69% on Thursday. Achillion Pharmaceuticals

shares fell 3.66% to $6.58 in pre-market trading after dropping 6.32% on Thursday. Abraxas Petroleum

shares dropped 3.48% to $4.99 in pre-market trading after the company launched an offering of 10 million shares and lifted its FY14 production outlook to 5,800-6,000 Boepd.