Benzinga's Top #PreMarket Gainers

Vanda Pharmaceuticals VNDA shares gained 17.48% to $15.32 in the pre-market after the FDA Advisory Committee recommended the approval of HETLIOZ. Agilent Technologies A surged 6.25% to $53.70 in the pre-market session after the company reported an upbeat Q4 profit. Tile Shop Holdings TTS shares jumped 4.71% to $13.56 in pre-market trading. Citigroup downgraded Tile Shop from Buy to Neutral. Arena Pharmaceuticals ARNA soared 3.70% to $5.30 in the pre-market trading after WallachBeth initiated coverage on the stock with a Buy rating.