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Stocks to Watch Friday: Splunk, Zumiez, Pandora

CHICAGO (MarketWatch) -- Science Applications International Corp., Splunk Inc., Zumiez Inc. and Pandora Inc. are among the stocks that could see active trading on Friday.

Science Applications International Corp. shares (SAI) were up 8% in after-hours trading Thursday after it said its board approved splitting the company into two publicly traded companies.

Zumiez Inc. (ZUMZ) shares fell as much as 10% in after-hours trading. The specialty retailer reported weaker-than-expected second-quarter earnings and a disappointing outlook for the third quarter.

Splunk (SPLK) rose 12% in evening trading after the data-analytics company reported a surge in sales that beat Wall Street's expectations.

Pandora (P) shares rose 14% in Thursday's regular session. and could be on the move again Friday. Late Wednesday, reported that it broke even on an adjusted per-share basis for the second quarter ended July 31, as revenue jumped to $89.4 million from the prior year's $58.3 million. The Oakland, Calif., Internet radio-service provider issued a better-than-expected revenue forecast for the third quarter.

Geron(GERN) shares rose 9% Thursday. Stifel Nicolaus analysts started the biotech company with a buy rating on Thursday morning.