Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and the Nasdaq Stock Market:
Yelp Inc., down $12.36 to $45.11
The online business reviews company reported better-than-expected quarterly results, but growth in the number of visitors to the site slowed.
Twitter Inc., up $6.75 to $48.01
The social media company reported better-than-expected results by drawing more users and expanding advertising.
LinkedIn Corp., up $25.43 to $263.40
The online professional networking service reported better-than-expected results and a boost in visitors.
Pandora Media Inc., down $3.17 to $15.24
The music streaming service reported worse-than-expected fourth-quarter profit and revenue and a weak 2015 sales outlook.
GoPro Inc., down $7.25 to $47.12
The wearable camera maker set weak first-quarter guidance and announced the surprise departure of its chief operating officer.
Expedia Inc., down $10.13 to $77.87
The online travel company reported a drop in fourth-quarter profit and the results also fell short of Wall Street expectations.
Activision Blizzard Inc., up 28 cents to $22.11
The video game maker reported better-than-expected fourth-quarter profit results, but its revenue fell short of expectations.
Rentrak Corp., down $23.90 to $56.62
The media measurement and research company reported a loss during its fiscal third quarter along with a cautious outlook.