Business

Jack Dorsey stepped down as chief executive of Twitter, which he helped found in 2006. Investors have long thought that Mr Dorsey was spreading himself too thin between Twitter and Square (soon to be renamed Block), a payments company that he will still lead. He was sacked as CEO in 2008, but returned to the job in 2015. Last year a hedge fund sought his removal, after Mr Dorsey said he wanted to spend some time in Africa. He once likened Twitter to a “global consciousness”. The job of running this universal system of awareness now falls to Parag Agrawal, the former chief technology officer.