0001104659-10-024706 15-12B 1 20100503 20100503 20100503 FACET BIOTECH CORP 0001441848 2834 263070657 DE 1231 15-12B 34 001-34154 10794026 1500 SEAPORT BLVD. REDWOOD CITY CA 94063 650-454-1000 1500 SEAPORT BLVD. REDWOOD CITY CA 94063 Biotech Spinco, Inc. 20080804 15-12B 1 a10-9198_11512b.htm 15-12B