A team of lawyers from Dewey & LeBoeuf’s Silicon Valley and New York offices represented Synopsys, Inc., a world leader in electronic design automation (EDA), on its definitive agreement to acquire Magma Design Automation Inc., a publicly traded provider of chip design software headquartered in San Jose, California, for more than $500 million.

Davis Polk is advising Affymetrix, Inc. on its approximately $330 million acquisition of eBioscience Holding Company, Inc. The transaction, which is expected to close in the fourth quarter of 2011, is subject to customary regulatory approvals and closing conditions, including receipt by Affymetrix of the proceeds of the debt financing for the transaction.

The Firm recently represented a group of underwriters, led by J.P. Morgan Securities LLC, Barclays Capital Inc., Morgan Stanley & Co. LLC and BofA Merrill Lynch, in connection with a registered public offering of common stock of Dunkin’ Brands Group, Inc. (“Dunkin’ Brands”), a portfolio company of Bain Capital LLC, The Carlyle Group and Thomas H. Lee Partners. A total of approximately $543.9 million in proceeds was raised in the offering. Affiliates of Bain Capital LLC, The Carlyle Group, Thomas H. Lee Partners and certain other selling stockholders received all of the gross proceeds from the offering.

Gibson, Dunn & Crutcher LLP is pleased to announce that John Gaffney has joined the firm’s New York office as a partner.  Before joining one of his clients, Gaffney spent most of his career as a partner with Cravath, Swaine & Moore where he focused on complex corporate and commercial transactions, mergers and acquisitions, and capital markets transactions, with particular emphasis on the media, telecom, renewable energy and shipping industries.

Greenberg Traurig represented DPL Inc., a publicly traded electric utility and power supplier, in connection with The AES Corporation’s $3.5 billion acquisition of DPL. The transaction closed Monday, November 28.