Benzinga's Top #PreMarket Losers

ImmunoGen

dipped 20.97% to $13.08 in the pre-market session after the company announced the discontinuation of IMGN901 study in small-cell lung cancer. BroadSoft

shares dropped 18.53% to $27.00 in pre-market trading after the company reported weaker-than-expected third-quarter results and issued a downbeat outlook for the fourth quarter. Rovi

shares fell 3.82% to $16.11 in the pre-market trading after Goldman Sachs downgraded the stock from Neutral to Sell and lowered the target price from $21 to $15. Fastenal Company

dipped 3.84% to $49.90. Fastenal's PEG ratio is 2.02.