Any independent company with a high-class, wholly-owned oncology asset is going to attract attention in this environment, and there aren't a lot of those out there.
I think it extends beyond oncology. The list is here MSG#161536:
REGN along with BMRN, ONXX, VRTX, INCY, MDVN, ARIA, THRX, VPHM, MDCO, SLXP form nice nucleus of middle tier of biotechs with significant revenue.