Benzinga's Top #PreMarket Losers

Genesis Energy LP GEL shares declined 6.47% to $43.91 in pre-market trading after the company priced an offering of 4 million units at $44.42 per unit. Dyax Corp. DYAX shares dropped 3.50% to $27.61 in pre-market after the company announced a proposed 7 million share public offering. Viacom, Inc. VIAB slipped 2.04% to $67.20 in pre-market trading after the company issued details of strategic realignment. The company projected a pretax charge of $785 million in the second quarter and announced its plans to reduce headcount. The company also said it will temporarily halt its stock buyback program. General Motors Company GM fell 1.85% to $35.98 in pre-market trading following the report of sale of 73.4 million shares by the Canadian government. American Express Company AXP shares fell 1.04% to $78.80 in pre-market trading. Oppenheimer downgraded American Express from Market Perform to Underperform.