Four top Twitter executives exit company

This the biggest leadership changes since Dorsey returned as chief executive in a struggle to revive the company’s growth. Media head Katie Jacobs Stanton, product head Kevin Weil, head of the engineering division, Alex Roetter, and HR head Brian Schipper are leaving.  

Dorsey praised the four executives and said he was sad to announce their departures. 

Twitter’s stock has fallen nearly 50 percent since Dorsey’s return last year and is now trading below its IPO price amid concern the company has failed to significantly boost its user base despite a quicker pace of product rollouts.