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

Thoratec Corporation (symbol: THOR) was one of the biggest winners of the
trading day today (2015-07-22), gaining 10.21%. The number of shares that
changed hands was 13,019,641, or about 19.3 times the average daily volume
in the stock.
The closing price was $63.46, amounting to a market cap of $3,440,000,000,
about -0.08% off the highest price in the last 12 months. The stock has
been trading at a range between $22.5 and $63.51.
THOR is in the Biotechnology: Electromedical & Electrotherapeutic Apparatus
industry, part of the Health Care sector.
Looking at its valuation, the stock is now trading at 82.63 times earnings.