CORRECTION!!!
Dimon exercised options to buy 1,864,486 shares of stock with his options between $28.86 - $30.06 per share, then sold 1,613,558 of them. It means he owns 251,000 or so more shares now than he did on 2/2/10.
This isn't a good indicator for investors, though. I mean, we don't know when the options were set to expire, but if the CEO is banking that the stock price will decrease, then that's not bueno.