https://www.cnet.com/news/facebook-spent-20-million-on-mark-zuckerbergs-security-last-year/

Like some other founder-CEOs (including Google's Larry Page and Apple's late cofounder Steve Jobs), Zuckerberg only takes a $1 salary each year. But his total compensation was $22.6 million, spent mostly on an "overall security program" for him and his family at home and during personal travel. That number more than doubled since 2017, when he made $9.1 million in total compensation.  

The company also said it spent $2.6 million on private plane costs. The figure, which is also included in his total compensation, is up from $1.5 million a year before. Facebook said the aircraft expenses went to charter companies and included "passenger fees, fuel, crew, and catering costs."