Social network and microblogging site Twitter has posted a $645 million loss for 2013.
Revenue for 2013 stood at $665 million, up 110 per cent year-on-year.
Q4 revenue reached $243 million, up 116 per cent, but Twitter made a net loss of $511 million during Q4.
Average Monthly Active Users were 241 million as of December 31st, 2013, an increase of 30 per cent year-on-year.
Advertising revenue per thousand timeline views reached $1.49 in Q4 2013, an increase of 76 per cent year-on-year.
During 2014, Twitter expects revenues to be in the range of $1,150 million to $1,200 million, with earnings before interest and taxes is projected to be in the range of $150 million to $180 million.
The company floated and began trading on the New York stock exchange last November.
"Twitter finished a great year with our strongest financial quarter to date," said Dick Costolo, CEO of Twitter.
"We are the only platform that is public, real-time, conversational and widely distributed and I'm excited by the number of initiatives we have underway to further build upon the Twitter experience."