$HZNP is one of biggest winner #stocks today. read more:

Horizon Pharma plc (symbol: HZNP) was one of the biggest winners of the
trading day today (2015-10-23), gaining 30.03%. The number of shares that
changed hands was 17,165,744, or about 3.6 times the average daily volume
in the stock.
The closing price was $17.06, amounting to a market cap of $2,720,000,000,
about -56.8% off the highest price in the last 12 months. The stock has
been trading at a range between $11.87 and $39.49.
HZNP is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2011.