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

LifeLock, Inc. (symbol: LOCK) was one of the biggest winners of the trading
day today (2015-10-29), gaining 43.86%. The number of shares that changed
hands was 15,456,611, or about 9.3 times the average daily volume in the
stock.
The closing price was $13.94, amounting to a market cap of $1,330,000,000,
about -27.21% off the highest price in the last 12 months. The stock has
been trading at a range between $7.18 and $19.15.
LOCK is in the EDP Services industry, part of the Technology sector. It
first went public in 2012.