This is kind of amusing/interesting. One of the hottest meme stocks around, Palantir, was principally funded by Peter Thiel. He dumped about 25 million shares on September 30 and October 1st, where the arrow is marked. As you can see, the stock was worth three times that much just the month following (in other words, half a billion dollars of profits later). He’s still got billions of bucks, but it just goes to show one shouldn’t read too much into insider sales information.