Days after Mark Zuckerberg said Threads had lost more than half its users, the head of Instagram is moving back to the US after just a year in London

• Adam Mosseri, the head of Instagram, has moved back to the US after a year in London.
• His relocation comes four days after Mark Zuckerberg said Threads had lost more than half its users.
• Mosseri cited the time difference and a "drastically" changed site strategy.

Adam Mosseri, the head of Instagram, is moving back to the US after spending a year in London, England, he said Monday. 

In a Threads post, Mosseri said the time difference "proved unsustainable" and "the company and the team's site strategy changed drastically since" his relocation.