after hours movers

U.S. equities see-sawed during Thursday's trading session but ended near the session lows. The Dow Jones lost 0.25 percent to close at 16,413.22, the S&P 500 lost 0.47 percent to close at 1,917.82 while the Nasdaq index was an under-performer as it lost 1.03 percent to close at 4,487.54....

Vanda Pharmaceuticals Inc. (NASDAQ: VNDA) gained more than 8 percent in after-hours trading Tuesday to $13.96 after the company posted positive results from a schizophrenia relapse prevention study of its Fanapt drug. The company will seek to include the results in the drug's labeling....

Below are 10 stocks that moved big during Thursday's after-hours session. Traders should keep an eye on these names on Friday. Twitter Inc (NYSE: TWTR) changed hands recently at $37.97, up more than 5 percent in active late trading Thursday after the company said its CEO resigned effective...

Aeropostale Inc (NYSE: ARO) jumped more than 6 percent after the bell Monday to $2.10 a share. The apparel retailer didn't issue news Monday and as of the closing bell, had gained about 15 percent during the past five trading days. SouFun Holdings Ltd (NYSE: SFUN) gained about 4.6 percent...

MaxLinear, Inc. (NYSE: MXL) jumped 9.7 percent after the bell Friday to $11.74 on news that Soros Fund acquired a 5.19 percent stake in the provider of radio-frequency chips as a passive investment. PowerSecure International, Inc. (NYSE: POWR) rose about 4 percent to $15.81 in late trading...

Civeo Corp (NYSE: CVEO) rose more than 5 percent to $3.95 after the bell Thursday. The company, which provides outsourced accommodations for employees of natural resource extraction companies, didn't issue news Thursday. Anthera Pharmaceuticals Inc (NASDAQ: ANTH) rose about 4 percent to $6....

PVH Corp (NYSE: PVH) rose about 3.7 percent in late trading Monday to $108.50. The apparel company beat first-quarter expectations. W&T Offshore, Inc. (NYSE: WTI) gained about 2.7 percent to $5.41 in late trading. The oil and gas company didn't issue news Monday. Aveo...

Rally Software Development Corp. (NYSE: RALY) gained more than 42 percent after the bell Wednesday to $19.25 after it agreed to be bought by CA Technologies (NASDAQ: CA) for $19.50 a share, or about $480 million, net of acquired cash. VAALCO Energy Inc. (NYSE: EGY) gained about 9 percent to $2....

Five Prime Therapeutics Inc. (NASDAQ: FPRX) soared more than 18 percent to $23.30 after the bell Tuesday on news that it has licensed certain antibodies to Bluebird Bio Inc. (NASDAQ: BLUE). ITT Educational Services Inc. (NYSE: ESI) jumped nearly 13 percent to $2.80 on no obvious catalyst. The...

Below are the most active movers to close this week's trading; they're worth watching heading into next week. Seattle Genetics Inc. (NASDAQ: SGEN) gained more than 3 percent to $44.60 in after-hours trading Friday. The company's largest shareholder and board member Felix Baker...

Monro Muffler Brake Inc. (NASDAQ: MNRO) recouped some of its earlier losses, rising 6 percent after the bell to $62.74. The retail auto repair company closed down nearly 6 percent earlier after missing quarterly expectations. Valeant Pharmaceuticals International Inc. (NYSE: VRX) picked up 5...

Williams-Sonoma, Inc. (NYSE: WSM) ticked up nearly 4 percent in Wednesday's extended session after the company posted first-quarter results that included comparable brand revenue growth of 4.6 percent. salesforce.com, inc. (NYSE: CRM) gained 3.6 percent to $72.76. The company beat first-...

Momo Inc (ADR) (NASDAQ: MOMO) shot up 25 percent in after-hours trading Monday to $16.08. The Beijing-based social networking platform provider swung to a first-quarter profit and said revenues increased by nearly four times to $26.3 million. Take-Two Interactive Software, Inc. (NASDAQ: TTWO)...

CalAmp Corp. (NASDAQ: CAMP) rose more than 11 percent in Tuesday's late session to $18.60 after the company said adjusted profits increased 60 percent during the fourth quarter, while revenue and earnings will "gain momentum" in the current year. AutoNation, Inc. (NYSE: AN)...