Today’s midday gainers are Intrexon Corp (NYSE:XON), Sarepta Therapeutics Inc (NASDAQ:SRPT) and SolarCity Corp (NASDAQ:STCY). The losers are Energy XXI (Bermuda) Limited (NASDAQ:EXXI), Voltari Corp (NASDAQ:VLTC) and Beazer Homes USA, Inc. (NYSE:BZH).

Energy XXI

Intrexon Surges

Our number one gainer of the day is Intrexon Corp (NYSE:XON), up +10.69%. A company engaged in synthetic biology industry, Intrexon was recently given an upgrade and is presenting at the 2014 Barclays Global Healthcare Conference today. The stock is up +28.11% YTD and is in the investment portfolios of billionairs Daniel Loeb, David Einhorn and Boone Pickens.

Second is Sarepta Therapeutics Inc (NASDAQ:SRPT), which increased +6.27%. The George Soros pick is up +38.68% this year.

Last up Tiger Global Management bet SolarCity Corp (NASDAQ:SCTY), its price surging +6.24% midday. The company announced a new agreement with Best Buy today that is expected to boost sales as it broadens its customer base.

Energy XXI Declines

Today’s biggest midday loser is Energy XXI (Bermuda) Limited (NASDAQ:EXXI). The Leon Cooperman pick dipped -6.76%. EXXI is acquiring EPL Oil and Gas for $2.3 billion – a warning sign for investors, as it will assume EPL’s debt in the process.

Down -4.68%, Voltari Corp (NASDAQ:VLTC) takes the second spot on today’s list of midday losers. The mobile advertising company is up +7% for the year and increased +4.02% yesterday, so this is likely a case of price direction. Carl Icahn has a position in this one.

Rounding out our daily ranking is Beazer Homes USA, Inc. (NYSE:BZH), which fell -4.00%. The share price of BZH is down -16.67% this year. Beazer Homes is part of David Tepper’s portfolio.