Here are some of the most interesting bits of information in Facebook’s IPO filing:

Zynga accounted for approximately 12% of Facebook revenue

Net income rose 65 percent to $1 billion in 2011, off revenue of $3.71 billion

Sheryl Sandberg’s 2011 Facebook compensation: $30.9 million

Facebook CFO David Ebersman’s 2011 total compensation was $18.65 million

Advertising accounted for 85% of Facebook revenue in 2011

Mark Zuckerberg’s compensation in 2011 was $1.49 million

845 million active users on Facebook

Total capitalization as of Dec 31, 2011: $4,899 million

Full time employees increased from 2,127 as of December 31, 2010 to 3,200 as of December 31, 2011

Mark Zuckerberg holds stock with total voting power before IPO of 56.9%

Facebook major ownership: Mark Zuckerberg : 28%, Accel (invested in 2005) :11.4% Co-founder Dustin Moskovitz 7.6% DST: 5.4% Peter Thiel: 2.5%

Mark’s letter in the middle of the IPO filing

Mark Zuckerberg’s annual salary will fall to one dollar starting 1/1/2013

Facebook had 483 million daily active users on average in December 2011, an increase of 48% as compared to 327 million in December 2010

425 million monthly active users of Facebook’s mobile products in December 2011

An average of 2.7 billion likes and comments per day were generated by users during the three months ending December 31, 2011

Facebook cites Google+, Cyworld in Korea, Mixi in Japan, Orkut in Brazil and India, vKontakte in Russia as competitors

Also cited by Facebook as competitors: Renren, Sina, and Tencent if they “are able to access the market in China in the future”

Peter Lauria points out that 85% of revenue dependent on advertising makes it more reliant than CBS, the most ad-dependent old-media firm.

Another interesting section addresses risks:

Any number of factors could potentially negatively affect user retention, growth, and engagement, including if: