Today’s top gainers are Myriad Genetics (NASDAQ:MYGN), BioFuel Energy (NASDAQ:BIOF) and Enphase Energy (NASDAQ:ENPH). The losers are Criteo SA (ADR) (NASDAQ:CRTO), Nimble Storage (NYSE:NMBL) and Ariad Pharmaceuticals (NASDAQ:ARIA).

Myriad Genetics

Myriad Genetics

Myriad Genetics Up

Our top midday gainer this Wednesday is Myriad Genetics, up +12.49. The company, which engages in the development of predictive medicine products, has confirmed that it will continue to receive Medicare payments. Myriad is a Tiger Global pick.

Second is BioFuel Energy Corp, which surged +6.97%. The stock regained part of yesterday’s losses. The David Einhorn and Daniel Loeb bet is now up +263.74% YTD.

Third is Enphase Energy, as its stock price increased +6.96%. Enphase designs, develops and sells micro-inverter systems for the solar industry. ENPH is also a Loeb asset.

Criteo Continues to Struggle

The biggest loser midday today is Criteo SA, down -6.45%. In fact, Criteo has been slipping since announcing a new stock offer in the middle of last month. CRTO is part of Tiger Global’s investment fund.

Also sliding today is Nimble Storage, which dipped -5.09% after yesterday’s +6.81% increase. This one’s a Tiger pick as well.

Last up is Ariad Pharmaceuticals, its price down -4.46%. Ariad announced the appointment of a new Chief Business Officer and SVP today. George Soros has a position in the oncology treatments company.