With US biosimilar competition looming for its C5 protein inhibitor blockbuster Soliris (eculizumab) in 2025, Alexion Pharmaceuticals doubled down on plans for up to 90% conversion to next-generation product Ultomiris (ravulizumab) as it was announced that AstraZeneca would acquire the US-based biotech in a cash-and-shares deal valued at $39bn.
Earlier this year, Amgen reached a settlement with Alexion in patent-litigation proceedings over Soliris, picking up the rights to...






