In Facebook’s upper ranks, what’s old is new again.

That’s because Chris Cox, one of Facebook’s most senior executives, recently returned as chief product officer, reporting to CEO Mark Zuckerberg, after a yearlong hiatus. As before, his domain includes the social network’s four main apps, as we show in our updated org chart, which identifies over 150 of the most senior leaders at Facebook.

Four of Zuckerberg’s recent direct reports—the heads of Instagram, Facebook, Messenger and WhatsApp—now report to Cox, though they still work directly with the CEO as well. Facebook’s chief marketing officer, Antonio Lucio, is also now back under Cox instead of reporting to chief operating officer Sheryl Sandberg. This setup is meant to encourage closer collaboration between the marketing and product organizations.