I just re-checked that Nasdaq.com listing of ownership-- OMG, Sarissa only owned 1,030,000 shares as of Dec. 31 so they've increased exactly NINE-FOLD thus far in 2015!
I'll repeat my post of ten minutes ago here for the full effect:
New beneficial ownership statement shows Sarissa now owns 9,271,757 shares 17.64% of shares.
Statement of Beneficial Ownership (sc 13d) Date : 02/23/2015 @ 4:07PM