Facebook's quarterly revenue rose more than 50%, beating Wall Street expectations as its popular mobile app and a push into live video lured new advertisers and encouraged existing ones to boost spending. 

The company's shares rose 9.5% in after-hours trading on Wall Street last night to $118.39. 

This sets it on track to open at a new high today, nearly triple its initial public offering four years ago. 

Facebook also announced it will create a new class of non-voting shares in a move aimed at letting chief executive Mark Zuckerberg give away his wealth without relinquishing control of the social media juggernaut he founded. 

The company plans to create a new class of non-voting shares, which would be given as a dividend to existing shareholders. 

That would allow Zuckerberg, who wants to give away 99% of his wealth, to sell non-voting stock to fund philanthropy and keep the voting stock that assures his control. 

Last night's results showed that some 1.65 billion people used Facebook monthly as of March 31, up from 1.44 billion a year earlier. 

Zuckerberg said users were spending more than 50 minutes per day on Facebook, Instagram and Messenger, a huge amount of time given the millions of apps available to users. 

Advertisers are shifting money from television to web and mobile platforms, and Facebook is one of the biggest beneficiaries. 

It faces fierce competition in the mobile video market, where rivals Snapchat and YouTube also garner billions of video views every day. 

Facebook recently expanded its live video product, rolling out several new features and making it more prominent on the app to encourage users to create videos and share them. 

The quarterly results showed success attracting advertisers with the move, and the company was able to expand its operating profit margin to 55% from 52% a year earlier. 

Facebook did not offer details on sales of its Oculus Rift virtual reality headset, but emphasised that it was early days and said that sales would not significantly impact 2016 revenue. 

The results come after disappointments for investors from several major Silicon Valley firms, including Twitter and Apple. 

Facebook said its net income attributable to common shareholders nearly tripled to $1.51 billion, or 52 cents per share, in the first quarter from $509m, or 18 cents per share, a year earlier. 

Excluding items, the company earned 77 cents per share, beating Wall Street's 62-cent consensus. 

Total revenue rose to $5.38 billion from $3.54 billion, with ad revenue increasing 56.8% to $5.20 billion. 

Mobile ad revenue accounted for about 82% of total ad revenue, compared with about 73% a year earlier. 

Analysts on average had expected revenue of $5.26 billion. 

If the stock proposal is approved - and Zuckerberg has a majority of voting stock - the company will effectively carry out a 3-for-1 stock split. 

Zuckerberg and his wife, Priscilla Chan, announced last year that they would give away 99% of their Facebook shares to fund charitable endeavors. 

Investors said they were not concerned that Zuckerberg would have increasing control, pointing to the company's consistent ability to grow and exceed expectations.