Seconding this advice, I was an early FB employee and we were instructed in 10b5-1 plans for this very reason. Also, get an attorney. TODAY! Don't even log int

Seconding this advice, I was an early FB employee and we were instructed in 10b5-1 plans for this very reason. Also, get an attorney. TODAY! Don't even log into your broker until you do. (Joking, but not really.) This is the aspect of your professional life most likely to ruin you and send you to prison if you mess it up. Pleading ignorance to the judge will not save you. There are also tax-favorable trades you can do, e.g. if you want to donate some of your wealth to charity there are better ways than cash (for both parties). An attorney can advise you and possibly save you many times their fee.