Photos: Twitter founders address all-staff meeting on eve of IPO filing

Unlike a lot of other technology companies that have recently gone public, Twitter $TWTR is no longer run by its founders:

• Ev Williams is now CEO of another startup, Obvious Corp.
• Biz Stone is working on a secretive project called Jelly.
• Jack Dorsey is chairman of Twitter, but mostly, he’s CEO of Square $SQ.
• Noah Glass has remained largely off the grid after an acrimonious parting.

But with Twitter on the verge of revealing its IPO prospectus, Williams, Stone, and Dorsey returned to the company’s San Francisco headquarters for a Q&A at an all-staff meeting. Several people there said the regularly-scheduled gathering of Twitter