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

Prothena Corporation plc (symbol: PRTA) was one of the biggest winners of
the trading day today (2016-07-20), gaining 8.64%. The number of shares
that changed hands was 790,090, or about 1.6 times the average daily volume
in the stock.
The closing price was $52.95, amounting to a market cap of $1,820,000,000,
about -30.71% off the highest price in the last 12 months. The stock has
been trading at a range between $28.2 and $76.42.
PRTA is in the Major Pharmaceuticals industry, part of the Health Care
sector.