Benzinga's Top #PreMarket Losers

Plug Power Inc. PLUG shares fell 9.82% to $2.48 in pre-market trading after the company posted a wider-than-expected loss for the fourth quarter. StemCells Inc. STEM shares dropped 6.45% to $1.16 in pre-market after the company reported a wider loss for the fourth quarter on Monday. National Penn Bancshares Inc. NPBC shares declined 4.92% to $10.24 in pre-market trading after the company announced the pricing of a 11.56 million share secondary offering by affiliates of Warburg Pincus. Carrizo Oil & Gas Inc. CRZO slipped 4.54% to $45.21 in pre-market trading after the company priced a 4.5 million share offering at $45.50 per share. Himax Technologies, Inc. HIMX fell 3.48% to $7.21 in pre-market trading after dropping 6.39% on Monday.