No more secrets: Twitter IPO filing is now public

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Twitter made its S-1 filing available to the public Thursday, finally shedding some light on its initial public offering plans.

(Read more: Twitter lights up Twitter with Twitter IPO )

The company intends to trade under the ticker TWTR and seeks to raise $1 billion, according to the filing. Goldman Sachs is the lead underwriter on the deal.

(Read more: Twitter's entire S-1 filing )

Twitter has seen rapid growth recently. Last year revenue rose 198 percent, to about $317 million, while its net loss declined 38 percent, to about $79 million, the filing said.

According to the filing, Twitter has more than 215 million monthly active users, 100 million of whom are daily active users.

(Read more: Why Twitter's moving ahead with its IPO now )

Mobile is the primary driver of its business, and 75 percent of monthly active users access Twitter from a mobile device, according to the filing. Those monthly active mobile users account for over 65 percent of Twitter's advertising revenue from mobile. Twitter said it expects its mobile revenue to continue to grow in the near term.

Twitter's revenue per user for the first half of the year was $1.18. The company did not disclose what it was in the second quarter.

While Twitter's strong mobile presence gives it an edge against competitors, it still may face some headwinds.

Some risk factors the company listed in the filing include slowing growth of its user base and a decline in demand for its advertising products. It also listed government censorship abroad as a risk that could prevent it from growing internationally.

There's still a lot of information that won't be revealed until later—such as the number of shares the company plans to offer and the share price—but the filing does provide insight into which investors stand to make the most money from the offering.

Ad engagement spikes for Twitter
Ad engagement spikes for Twitter

Co-founder Jack Dorsey has a 4.9 percent stake in the company; co-founder Evan Williams has a 12 percent stake; and Peter Fenton, a Twitter board member, has 6.7 percent.

Executive compensation figures are also disclosed in the filing, including CEO Dick Costolo, who had a base salary of $200,000 last year, with $8.4 million in restricted stock and options with a grant-date value of $2.9 million.

The company announced last month that it had confidentially submitted documents to the Securities and Exchange Commission with plans to go public, but didn't reveal anything else about its IPO plans.

The filing was made under the JOBS Act, which lets companies with less than $1 billion in revenue work with regulators on IPO plans before actually making them public.

The micro-blogging site has been valued at about $10 billion and is one of the most anticipated Silicon Valley IPOs since Facebook.

(Read more: Twitter may kickstart consumer-tech IPO train )

This story is developing. Check back on for updates.

(Read more: Who owns Twitter? )

See how other social media stocks are trading: LinkedIn, Facebook.

By CNBC's Cadie Thompson. Follow her on Twitter @CadieThompson.