Not necessarily. Addressing just the Buyer Class Period (those who bought while SAC was selling during the seven trading days prior to ICAD, July 21, 2008 through 4:00 pm ET July 29, 2008), we are using FIFO, so if you owned some shares as of July 21, 2008, bought more during those seven days and also sold some, those sales would first be applied against the shares you held at the beginning of the class period.
For the Seller Class Period (those who sold while SAC was buying, from roughly mid-2006 through 2:00 am ET June 17, 2008), it is more complicated, depending on the date(s) of the trade.
I recommend that anyone who traded during those two years go ahead and file a claim, and see if you qualify. Go to the website
http://sac-elan.com/ to get more information and access to the online claim form.