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

Opower, Inc. (symbol: OPWR) was one of the biggest winners of the trading
day today (2016-05-02), gaining 30.25%. The number of shares that changed
hands was 18,196,342, or about 84.6 times the average daily volume in the
stock.
The closing price was $10.29, amounting to a market cap of $535,030,000,
about -20.66% off the highest price in the last 12 months. The stock has
been trading at a range between $5.3 and $12.97.
OPWR is in the Computer Software: Prepackaged Software industry, part of
the Technology sector. It first went public in 2014.