Benzinga's Top #PreMarket Losers

Yelp Inc YELP shares dropped 20.29 percent to $26.71 in pre-market after the company posted a loss in the second quarter and lowered its full-year revenue outlook. Twitter Inc TWTR shares declined 10.06 percent to $32.86 in pre-market trading. Twitter reported stronger-than-expected results for its second quarter. Average Monthly Active Users increased 15 percent year-over-year to 316 million in the second quarter. Akamai Technologies, Inc. AKAM shares tumbled 8.65 percent to $67.28 in pre-market trading after the company reported weaker-than-expected Q2 earnings and issued a downbeat Q3 guidance. Transocean LTD RIG fell 2.27 percent to $13.80 in pre-market trading after surging 7.70 percent on Tuesday. Transocean is expected to reports Q2 earnings on Wednesday, August 5, 2015. Mastercard Inc MA shares fell 2.27 percent to $93.00 in pre-market trading. Mastercard reported in-line earnings for the second quarter.