Benzinga's Top Pre-Market Losers

Cytokinetics (NASDAQ: CYTK) shares dropped 19.68% to $8.41 in pre-market trading on failed Phase 2 ATOMIC-AHF study.

Murphy Oil (NYSE: MUR) dipped 5.10% to $63.98 in the pre-market session. Murphy Oil completed the spin-off of Murphy USA Inc.

Verizon Communications (NYSE: VZ) dipped 4.50% to $45.25 in the pre-market session after the company agreed to buy Vodafone Group's (NASDAQ: VOD) 45% stake in Verizon Wireless for $130 billion deal.

Microsoft (NASDAQ: MSFT) shares fell 4.73% to $31.82 in the pre-market trading after the company announced its plans to buy Nokia's (NYSE: NOK) cellphone business for 5.44 billion euros ($7.2 billion).