Twitte

Twitter gives co-founder Jack Dorsey a 2nd chance as CEO

The hiring revealed Monday in a regulatory filing ends Twitter's three-month search for a new leader. It marks Dorsey's second stint as CEO since he helped start the San Francisco company more than nine years ago with Evan Williams, Biz Stone and Noah Glass.

Twitter dumped Dorsey his first time around, but its board of directors is now convinced he has the maturity and expertise to fix the problems that have caused the company's stock to lose nearly half its value in the past five months.