Death of the Top-Up Option in Two-Step Transactions

James Matarese and Danielle Lauzon are M&A partners at Goodwin Procter LLP whose practices focus on technology and life sciences companies. Their recent representations include Onyx Pharmaceuticals in its merger with Amgen in a transaction valued at $10.4 billion.  

On October 1, 2013, Amgen Inc. (“Amgen”) announced the completion of its acquisition of Onyx Pharmaceuticals, Inc. (“Onyx”).  The transaction was structured as a two-step acquisition – a tender offer by Arena Acquisition Company (the “Purchaser”), a Delaware corporation and wholly-owned subsidiary of Amgen, for all outstanding shares of Onyx, followed by a “back-end” merger of the Purchaser with and into … Read more

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