twitter 300Yes, Twitter doubled its revenue in the third quarter of this year. But updates to the company’s S-1 filing today also reveal substantial losses.

Twitter reported $64.6 million in losses from June 30 to Sept. 30, an increase of more than $43 million during the same three-month period in 2012. That also means Twitter has $133.9 million in net losses for 2013, up 89 percent from last year.

Twitter, which is looking to raise $1 billion in an initial public offering, also reported an employee count of 2,300 and 230 million active monthly users.

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