Benzinga's Top Pre-Market Gainers

BGC Partners BGCP soared 43.38% to $5.52 in the pre-market trading. Nasdaq OMX Group NDAQ agreed to acquire eSpeed from BGC Partners for $750 million in cash. Obagi Medical Products OMPI moved up 16.18% to $22.90 in the pre-market session after Merz Pharma Group made superior proposal to buy the company for $22 per share in cash. Humana HUM surged 9.30% to $82.00 in the pre-market session after the company disclosed assessment on final 2014 Medicare rate notice. Nuance Communications NUAN shares gained 7.83% to $21.76 in the pre-market session. Carl Icahn has bought a 9.27% stake in Nuance Communications, CNBC reported.