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twitterTwitter made some amendments to its S-1 filing today, revealing that it will list shares on the New York Stock Exchange under TWTR.

Also notable is the company’s employee count. When Twitter first made its IPO filing public earlier this month, it noted 2,000 employees as of June 30.

Now, though, that number has jumped to 2,300 (as of Sept. 30) in today’s updated filing, meaning Twitter hired about 300 in the past three months (June 30 – Sept. 30).

The 2,300 number is an increase of more than 1,100 full-timers from this time last year, which Twitter calls an approximate increase of 87 percent. It’s also an increase of more than 2,200 employees since Jan. 1, 2010.

The Twitter cohort in Seattle is certainly growing as well. The team recently moved from its temporary old digs near Seattle’s historic Pike Place Market to a 16,000 square-foot space at the Century Square building in downtown Seattle after about one year in the Emerald City.

Facebook, social media’s other titan that is listed on NASDAQ, currently employs 5,299, growing from 3,976 employees in 2012 — a 33 percent growth compared with 87 percent for Twitter.

Of course, both companies are a far cry from the other big tech titans, as the chart below shows:

amazon-employeeschart

There is a bevy of other new information on the updated filing, including usage stats and financial information. The company doubled its revenue in the third quarter, but has also racked up $133.9 million in losses for 2013.

Twitter also says it now has 230 million active users, up from 218 million at the end of June. Mobile advertising now accounts for 70 percent of all advertising revenue, compared to 65 percent last quarter.

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