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

Atara Biotherapeutics, Inc. (symbol: ATRA) was one of the biggest winners
of the trading day today (2016-06-07), gaining 8.48%. The number of shares
that changed hands was 322,805, or about 1.4 times the average daily volume
in the stock.
The closing price was $20.99, amounting to a market cap of $603,340,000,
about -67.98% off the highest price in the last 12 months. The stock has
been trading at a range between $13.31 and $65.56.
ATRA is in the Biotechnology: Biological Products (No Diagnostic
Substances) industry, part of the Health Care sector. It first went public
in 2014.