Shares of MediciNova, Inc. (NASDAQ: MNOV) were up more than 3 percent in Friday’s after-hours session, leading the afternoon’s gainers on no particular news on a volume of approximately 3,400 shares.

The biggest loser so far is WisdomTree Trust (NASDAQ:DXJS), down more than 9 percent since the bell rang, after having gained 3.19 percent during the day.

PBF Energy Inc (NYSE: PBF) declined more than 1.6 percent, losing most of the ground gained (2.8 percent) during the regular session.

SunPower Corporation (NASDAQ: SPWR) was up more than 3 percent, after having tumbled 1.73 percent on Friday, while Flamel Technologies S.A. (ADR) (NASDAQ: FLML) was up almost 3 percent, following a 6.75 percent drop during the day.

Comstock Resources Inc (NYSE: CRK) was up 2.5 percent in after-hours trading. However, the gains do not make up for the 14.41 slip seen during the regular session.

Other stocks surging on Friday’s after-hours trading include:

• Community Health Systems (NYSE: CYH), up roughly 2 percent
• Ares Management LP (NYSE: ARES), also up about 2 percent
• Horizon Pharma PLC (NASDAQ: HZNP), up more than 2.2 percent
• Acadia Healthcare Company Inc (NASDAQ: ACHC), up approximately 2.2 percent
• Masimo Corporation (NASDAQ: MASI), up about 2.3 percent

On the other hand, losers include:

• YRC Worldwide Inc (NASDAQ: YRCW), down 1 percent
• Westlake Chemical Partners LP (NYSE: WLKP), down more than 1.6 percent
• Danaos Corporation (NYSE: DAC), down 1.27 percent

Disclosure: Javier Hasse holds no positions in any of the securities mentioned above.

See more from Benzinga

• This Analyst Loves Depomed And Its Nucynta Prescription
• Tuesday's After-Hours Movers Led By Analog Devices, Canadian Solar And Weibo
• Last Week's Top Hedge Fund Moves: D.E. Shaw, OZ Management & Lone Pine

© 2015 Benzinga.com. Benzinga does not provide investment advice. All rights reserved.