$XON is one of biggest losers #stocks today. read more:

Intrexon Corporation Common Sto (symbol: XON) was one of the worst losers
of the trading day today (2015-09-28), losing -19.22%. The number of shares
that changed hands was 5,574,298, or about 3 times the average daily volume
in the stock.
The closing price was $31.78, amounting to a market cap of $3,490,000,000,
about -54.24% off the highest price in the last 12 months. The stock has
been trading at a range between $16.13 and $69.45.
XON is in the Biotechnology: Commercial Physical & Biological Resarch
industry, part of the Health Care sector. It first went public in 2013.