El Pollo LoCo Holdings Inc (NASDAQ:LOCO) slipped 13.11 percent to $25.25 in pre-market trading after the Mexican food chain released its first-quarter earnings results with disappointing full-year earnings guidance. On the bright side, the company  posted earnings of 18 cents per share, beating consensus estimate of 17 cents per share for the quarter.

King Digital Entertainment PLC (NYSE:KING) shares declined 8.67 percent to $13.69 in pre-market trading on disappointing outlook. The digital game maker posted quarterly results that have topped Wall Street estimates for earnings and revenue, however, the company noted the mid-year period will be “seasonally softer” because of foreign currency woes.

Keurig Green Mountain Inc (NASDAQ:GMCR) shares dropped 6.18 percent to $96.70 in pre-market after the coffee giant unveiled new details of its forthcoming cold beverage system, saying the machines will cost around $300 or more and will be rolled out slowly over the next year and a half.

Pernix Therapeutics Holdings Inc (NASDAQ:PTX) shares rose 6.20% to $6.85 per share following news that the U.S. Food and Drug Administration (FDA) has approved the company’s TREXIMET® for use in pediatric patients 12 years of age and older for the acute treatment of migraine with or without aura.