The Roku 3 TV streaming player menu will be shown on a television on Thursday September 12, 2013 in Los Angeles, California, United States.

Patrick T. Fallon | Bloomberg via Getty Images

Check out the companies that are making headlines after the bell:

Tripadvisor – The travel booking company’s shares fell 1% in expanded trading after losing more than expected. Tripadvisor lost 41 cents a share in the fourth quarter, worse than a loss of 26 cents a share projected by Refinitiv. The company said it sees signals of growing demand for pent-up travel.

Roku – The digital media hardware company’s stocks rose 3% after the company’s latest quarterly results beat Wall Street estimates. The company made 49 cents a share, compared to a refinitive forecast of 6 cents a share loss. Roku’s sales were $ 650 million, above the estimate of $ 615 million.

Dropbox – The file hosting service’s stake was 1.1% after posting better-than-expected quarterly results in after-hours trading. Dropbox earned 28 cents per share, beating a refinitive estimate by four cents. The company’s sales also exceeded Wall Street’s expectations.

Universal Display – Technology stock rose 3.7% after the company’s quarterly results beat Wall Street’s expectations. Universal Display reported earnings of $ 1.13 per share, beating analysts’ 64 cents per share, according to FactSet. Income was also above estimates.

Arista Networks – Arista Networks’ shares rose nearly 7% after the network hardware company posted better-than-expected fourth-quarter results. The company posted earnings per share of $ 2.49, 10 cents above a FactSet consensus.