$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 (2015-09-30), gaining 17.91%. The number of shares that
changed hands was 10,565,886, or about 2.9 times the average daily volume
in the stock.
The closing price was $19.82, amounting to a market cap of $3,160,000,000,
about -49.81% off the highest price in the last 12 months. The stock has
been trading at a range between $10.15 and $39.49.
HZNP is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2011.