28 Stocks Moving In Friday's Pre-Market Session

Gainers

• Yelp Inc YELP shares rose 19.9 percent to $37.61 in pre-market trading after the company reported upbeat Q2 results and disclosed a partnership with GrubHub Inc GRUB. Yelp announced plans to sell its Eat24 business.
• Epizyme Inc EPZM gained 16.9 percent to $14.55 as the company posted a narrower-than-expected Q2 loss.
• GoPro Inc GPRO rose 15.6 percent to $9.55 in pre-market trading after the company posted a narrower-than-expected loss for its second quarter and issued a strong forecast for the third quarter.
• Weight Watchers International, Inc. WTW rose 15.6 percent to $38.25 in pre-market trading after the company posted stronger-than-expected results for its second quarter.
• Arista Networks Inc ANET rose 15 percent to $165.55 in pre-market trading after the company reported better-than-expected results for its second quarter and issued a strong sales forecast for the third quarter.
• Allscripts Healthcare Solutions Inc MDRX shares rose 11.8 percent to $13.05 in pre-market trading as the company posted in-line Q2 earnings and issued a strong FY17 sales forecast.
• United Therapeutics Corporation UTHR rose 10.7 percent to $140.49 in pre-market trading.
• Editas Medicine Inc EDIT rose 10.2 percent to $19.00 in pre-market trading after gaining 9.04 percent on Thursday.
• Calumet Specialty Products Partners, L.P CLMT shares rose 8.4 percent to $5.80 in the pre-market trading session. Calumet Specialty Products reported Q2 earnings of $0.12 per share.
• The Western Union Company WU shares rose 7.3 percent to $21.00 in pre-market trading as the company posted upbeat earnings for its second quarter.
• Lilis Energy Inc LLEX shares rose 6 percent to $4.10 in pre-market trading. Lilis Energy named James Linville as CEO.
• Himax Technologies, Inc. (ADR) HIMX rose 5.8 percent to $8.77 in pre-market trading after the company reported Q2 results.
• LG Display Co Ltd. (ADR) LPL rose 5.7 percent to $14.39 in pre-market trading after declining 2.71 percent on Thursday.

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Losers

• Electronics For Imaging, Inc. EFII shares fell 30.8 percent to $33.00 in pre-market trading. Electronics For Imaging disclosed that it has postponed Q2 release due to accounting issues related to revenue recognition. Morgan Stanley downgraded Electronics for Imaging from Equal-Weight to Underweight.
• Applied Optoelectronics Inc AAOI shares fell 26.6 percent to $71.90 in pre-market trading. Applied Optoelectronics posted upbeat results for its second quarter, but issued a weak forecast for the current quarter.
• Natural Grocers by Vitamin Cottage Inc NGVC shares fell 23.4 percent to $6.51 in pre-market trading as the company posted downbeat quarterly results and lowered its FY17 earnings guidance.
• IMPINJ Inc PI shares fell 21.7 percent to $37.50 in pre-market trading. IMPINJ posted strong results for its second quarter, but issued a weak outlook for the current quarter.
• ConforMIS Inc CFMS fell 20.6 percent to $3.40 in pre-market trading. ConforMIS posted a narrower-than-expected Q2 loss, but sales missed estimates. Deutsche Bank downgraded ConforMIS from Buy to Hold.
• Meet Group Inc MEET fell 13 percent to $4.41 in pre-market trading. Meet Group reported Q2 earnings of $0.09 on revenue of $31.3 million. The company issued a weak sales forecast.
• Infinera Corp. INFN fell 12.9 percent to $9.99 in pre-market trading. Infinera posted a narrower-than-expected Q2 loss, but sales missed estimates.
• Archrock Partners LP. APLP fell 12.3 percent to $13.45 in pre-market trading. Archrock Partners reported a 4 million offering of common stock.
• Fluor Corporation (NEW) FLR fell 11.5 percent to $38.80 in pre-market trading. Fluor reported a Q2 loss of $0.17 per share on sales of $4.716 billion. The company also lowered its FY17 earnings guidance.
• Synaptics, Incorporated SYNA fell 11 percent to $45.00 in pre-market trading. Synaptics reported Q4 adjusted earnings of $1.18 per share on revenue of $426.5 million.
• Mercadolibre Inc MELI shares rose 10.7 percent to $260.99 in pre-market trading after the company posted downbeat Q2 earnings.
• Viacom, Inc. VIAB fell 9.1 percent to $31.90 in pre-market trading. Viacom reported better-than-expected results for its third quarter. However, the company projects a decline in domestic advertising revenue for the current quarter.
• Viacom, Inc. VIA fell 8.9 percent to $37.55 in pre-market trading. Viacom reported better-than-expected results for its third quarter. However, the company projects a decline in domestic advertising revenue for the current quarter.
• Carbonite Inc CARB shares fell 8.4 percent to $21.40. Carbonite reported a Q2 loss of $6.4 million. Carbonite projects full-year earnings of $0.74 to $0.80 per share, on revenue of $160.6 million to $170.2 million.
• Dynavax Technologies Corporation DVAX shares fell 6.8 percent to $15.86 in pre-market trading after the company disclosed that the FDA has requested more info about proposed post market study for HEPLISAV-B.