Prospectus
http://www.sec.gov/Archives/edgar/data/1418091/000119312513431301/d564001d424b4.htm
selling 70 million shares at $26
total outstanding 544.696 million
market cap at $26 is 544.696 * 26 = $14.162 billion
2012 revenue was $317 million
2013 revenue (9 months) was $422 million
approx 2013 revenue will be $656 million
(m22au estimation based on 9 months ending 30 Sept 2012 and 30 Sept 2013)
or $620 million, based on the USA Today article below
(620 * 1.53 = 950)
Using the $656 million figure for 2013 sales, price to sales ratio is 21.
http://www.usatoday.com/story/tech/columnist/2013/11/06/twitter-ipo-price-will-cost-you/3455525/
Twitter's roadshow presentation forecast the company to post $950 million in 2014 sales, giving it a price-to-expected-sales ratio of 16 even before it starts trading.
LinkedIn and Facebook have price-to-sales ratios of 12-to-1, based on Wall Street's revenue estimates for next year.
If Wall Street's projection is on the mark, Twitter's revenue will rise 53% next year.
That's faster than LinkedIn's expected growth of 42% and Facebook's, at 36%.