Tech Five: Box surges off earnings

Cloud computing startup Box is off to a fast start on the markets Thursday. Let's take a look at the tech stocks to watch:

Box. Shares are up 13% in pre-market trading after the company topped estimates during the first quarter. Box reported a net loss of 28 cents a share with revenue of $65.6 million, beating forecasts of $63 million.

Amazon. The European Commission says it's investigating the online retailer's business practices, claiming clauses in the company's contracts with publishers might limit competition. If confirmed, the clauses could violate antitrust laws.

Facebook. The social network's virtual reality company Oculus is hosting a press conference Thursday. Recently, the startup confirmed its Oculus Rift VR headset would start shipping early next year.

Microsoft. The tech giant will acquire the app management service Bluestripe. Microsoft says it will use the company's technology to help improve the visibility of apps.

Google. The company announced the Sidewalk Labs initiative to help improve life in the city. Sidewalk Labs will be run by former New York City deputy mayor Dan Doctoroff.

Follow Brett Molina on Twitter: @brettmolina23.