Benzinga's Top Pre-Market Gainers

Coventry Health Care CVH surged 18.20% to $41.30 in the pre-market session. Aetna AET announced its plans to buy Coventry Health Care for $5.6 billion in cash and stock. The Mosaic Company MOS added 3.36% to $61.61 in the pre-market session. Mosaic's trailing-twelve-month operating margin is 23.51%. Amarin Corporation plc AMRN moved up 2.78% to $12.21 in the pre-market session. Amarin had $250.26 million in total cash for the latest quarter. DR Horton DHI soared 2.63% to $19.48 in the pre-market trading. DR Horton shares have jumped 112.07% over the past 52 weeks, while the S&P 500 index has gained 26.22% in the same period.