$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 (2016-04-21), losing -26.42%. The number of shares
that changed hands was 14,106,320, or about 8 times the average daily
volume in the stock.
The closing price was $27.1, amounting to a market cap of $3,160,000,000,
about -60.98% off the highest price in the last 12 months. The stock has
been trading at a range between $18.52 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.