Benzinga's Top #PreMarket Losers

Cempra Inc CEMP fell 11.24 percent to $25.50 in pre-market trading on the announcement of proposed public offering of $175 million of common stock. Pioneer Natural Resources PXD shares fell 7.70 percent to $115.50 in pre-market trading on the announcement of a public offering of 10.5 million shares of its common stock. Sonic Corporation SONC shares fell 5.66 percent to $29.65 in pre-market trading. Sonic reported better-than-expected earnings for the first quarter on Tuesday. Otonomy Inc OTIC shares fell 5.45 percent to $23.00 in pre-market trading after the company reported a $100 million stock offering. Chesapeake Energy Corporation CHK shares fell 5.19 percent to $4.75 in pre-market trading after gaining 0.80 percent on Tuesday.