After-market Movers For July 31-CBS, DWA, WFM, YELP, SAM, TRLA, THOR, CTRP, SLCA

(RTTNews) - Gainers:

CBS Corp. (CBS) gained 1 percent to $53.55. The company's second quarter profit improved from the prior year. Revenues for the quarter rose 11 percent. The company noted that revenue growth was led by a 22 percent increase in content licensing and distribution revenues, which were driven by licensing agreements for digital streaming and international syndication. Advertising revenues advanced 5 percent.

DreamWorks Animation SKG Inc. (DWA) rose 5 percent to $26.02. The company's second quarter earnings and revenues were higher than the prior year period and were ahead of Street view. The company attributed its second quarter performance primarily to The Croods' successful box office run.

Yelp, Inc. (YELP) advanced 7 percent to $45.00. The company's second quarter net loss narrowed from the year-ago quarter and topped analysts' estimate. Net revenue surged 69 percent and was above the consensus estimate. Cumulative reviews grew 41 percent, while average monthly unique visitors grew 38 percent. The company forecast third quarter revenue above market view and also raised its full year 2013 revenue and adjusted EBITDA guidance.

Boston Beer Co. Inc. (SAM) surged 9 percent to $196.00 as the company's second quarter results were above Wall Street view. The company also increased its 2013 earnings per share guidance.

Trulia, Inc. (TRLA) rose 12 percent to $41.70. The company reported a net loss in the second quarter that was narrower than the year-ago quarter. Total revenue for the quarter increased 77 percent and came above Street view. The company also guided third quarter revenue above analysts' projection.

Thoratec Corp. (THOR) improved 8 percent to $35.62. The company's second quarter results were above analysts' expectations. The company reaffirmed its fiscal 2013 revenues guidance, but lowered its earnings forecast to account for recurring operating expenses associated with the development of DuraHeart II.

Ctrip.com International, Ltd. (CTRP) gained 10 percent to $40.50 after reporting higher profit and net revenue for the second quarter. The company forecast third quarter net revenue growth to continue year-on-year at a rate of approximately 20-25 percent.

Decliners:

Whole Foods Market, Inc. (WFM) declined 2 percent to $54.45. The company's third quarter profit improved from the same period a year earlier and topped Wall Street view. Sales for the quarter increased 12 percent, but missed the consensus estimate. Same-store sales increased 7.5 percent.

U.S. Silica Holdings, Inc. (SLCA) fell 8 percent to $22.25 as the company's second quarter results missed Wall Street view.