Benzinga's Top #PreMarket Losers

Opko Health Inc. OPK fell 6.90 percent to $17.80 in pre-market trading after the company announced its plans to buy Bio-Reference Laboratories Inc BRLI in a $1.5 billion deal. Prima Biomed Ltd. PBMD shares fell 3.34 percent to $2.09 in pre-market trading after the company reported that it has regained compliance with the Nasdaq minimum bid rule. Verint Systems Inc. VRNT shares declined 3.32 percent to $64.15 in pre-market trading. Verint Systems reported better-than-expected earnings for the first quarter, but the company's sales missed analysts' expectations. VWR Corp VWR shares tumbled 2.99 percent to $26.55 in pre-market trading after the company priced a 16 million share offering at $26.25 per share. Zions Bancorporation ZION shares dropped 2.98 percent to $30.00 in pre-market after rising 1.31 percent on Wednesday.