I mean, I thought he had entirely restricted stock, which meant it could only be sold/bought within a designated trading window every quarter.
The implication I get from the article is that he's dumping outside the trading windows (unless I'm reading too deep into it), and that's why I'm confused.
Zuckerberg isn't personally dumping. It's the central banks and hedge funds that are dumping. They all have their wagons hitched to FB.
Imagine how crazy that would have sounded not even that many years hence. In the near future, central banks and hedge funds will me reliant on a social media app where people share pictures of food and cats. Nobody would have believed it.