Benzinga's Top Pre-Market Losers

Boston Private Financial Holdings

shares fell 4.01% to $9.81 in the pre-market trading after the company announced secondary offering by BP Holdco L.P. Vanguard Natural Resources LLC

dipped 3.86% to $28.30 in the pre-market session after the company announced public offering of 7 million common units. Halliburton Company

shares dropped 1.54% to $42.90 in pre-market trading. Halliburton's trailing-twelve-month profit margin is 6.96%. Alcoa

dipped 1.28% to $8.47 in the pre-market session after Moody's Investors Service downgraded Alcoa's credit rating to junk status.