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

Seadrill Limited (symbol: SDRL) was one of the biggest winners of the
trading day today (2016-09-28), gaining 19.69%. The number of shares that
changed hands was 18,582,932, or about 2.9 times the average daily volume
in the stock.
The closing price was $2.31, amounting to a market cap of $1,170,000,000,
about -70.87% off the highest price in the last 12 months. The stock has
been trading at a range between $1.57 and $7.93.
SDRL is in the Oil & Gas Production industry, part of the Energy sector.