H. Lundbeck A/S is to acquire Longboard Pharmaceuticals Inc. in an all-cash deal valuing the epilepsy specialist at $2.6 billion. The agreed price of $60 per share is a 54% premium to the closing price of Longboard stock (NASDAQ:LBPH) on Oct. 11 and represents the biggest deal in Lundbeck’s 110-year history. The acquisition will give the Copenhagen, Denmark-based pharma company ownership of bexicaserin, which in September entered phase III development in Dravet syndrome. The 5-HT2C agonist has the potential to treat this and other rare developmental and epileptic encephalopathies, for most of which there are no approved therapies.