Mike Gupta, chief financial of Twitter, photographs a board before the trading begins.
2/11
Twitter CEO Dick Costolo, Chairman and co-founder Jack Dorsey and co-founder Evan Williams and Biz Stone pose for a photo.
3/11
Twitter Chairman and co-founder Jack Dorsey and co-founder Evan Williams and Biz Stone wait for the bell to ring at the NYSE.
4/11
Twitter CEO Dick Costolo does a high-five with NYSE CEO Duncan Niederauer, right, as shares begin trading.
5/11
Technician checks the bell podium of the NYSE.
6/11
Twitter CEO Dick Costolo and chief financial Mike Gupta.
7/11
Twitter CEO Dick Costolo, Chairman and co-founder Jack Dorsey and co-founder Evan Williams and Biz Stone, front left to right, applaud as they watch the NYSE opening bell rung.
8/11
The Twitter bird logo on an updated phone post on the floor of the NYSE.
9/11
A pictur of Twitter is seen outside the building of New York Stock Exchange.
10/11
A man with a mobile is seen outside the building of NYSE with a picture of Twitter.
11/11
A picture of Twitter on the building of New York Stock Exchange prior to the launch of the company's IPO.
