Stocker,
According to movant Howard, he bought shares as early as April 12, 2010. According to movant Amos, he bought shares as early as February 2, 2010. Both would have preceded the restatement (unlike the case of Pancoe). I don't recall either movant reporting any sales, but that would not preclude their ability to serve as lead plaintiff.
I think scion posted at least one of the movant's certified purchase history. The other one is available on Pacer, or perhaps it has been posted here as well. I can try to get a copy to you if you like.