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

Zendesk, Inc. (symbol: ZEN) was one of the biggest winners of the trading
day today (2015-08-05), gaining 13.7%. The number of shares that changed
hands was 4,138,759, or about 5.7 times the average daily volume in the
stock.
The closing price was $23.24, amounting to a market cap of $2,000,000,000,
about -17.59% off the highest price in the last 12 months. The stock has
been trading at a range between $18.84 and $28.2.
ZEN is in the EDP Services industry, part of the Technology sector. It
first went public in 2014.