Are hostile biotech takeovers becoming more common? The five largest initially-hostile drug/biotech deals: [pre] Acquired Deal Company Buyer Value Date Notes Sanofi-Synthélabo Aventis $71B 1/04 Billed as merger of =’s. Genentech Roche $47B 7/08 For 46% not owned. GENZ SNY $20B 8/10 Excl. contingent rights. Chiron NVS $5.9B 9/05 For 54% not owned. CEPH VRX $5.7B 3/11 Proposed deal.[/pre] Source: http://www.ft.com/cms/s/0/65661f04-5e44-11e0-b1d8-00144feab49a.html