X0303 4 2010-04-03 0 0001441848 FACET BIOTECH CORP FACT 0001230724 GUGGENHIME ANDREW 1500 SEAPORT BLVD REDWOOD CITY CA 94063 0 1 0 0 SVP & CFO Common Stock 2010-04-03 4 F 0 1516 26.98 D 44473 D Represents the number of shares withheld by and surrendered to the issuer to satisfy tax withholding obligations incident to the vesting of restricted shares of common stock on April 3, 2010. /s/ Andrew Guggenhime 2010-04-05