His "dump" was not a week before earnings, it was the first 3-4 days of October and he bought 130K of those shares in March of this year. He still owns over 400K shares. I would assume he is doing some adjustments in his holdings.
If another sale happens now, we have to do more considering. You cannot expect every insider to hold every share they own forever. If I would have been in his shoes I would have surely been wanting to lessen my exposure. The old "don't put all your eggs in one basket" like too many at ENRON and WORLD COM did.
If another insider makes a trade of significance.......SALE.......in the next 60-120 days we all need to get out our magnifying glasses and get nervous.
One sale.......can't place much into that....especially when the major insider holds over 4 mil shares and hasn't sold off.