William Allen

Partner at Simpson Thacher & Bartlett

A Corporate Partner in the Firm’s New York Office, William Allen concentrates his practice on complex public and private mergers and acquisitions and other corporate transactions. He regularly advises strategic clients and private equity sponsors on a broad range of domestic and cross-border mergers and acquisitions, leveraged buyouts, carve-outs, recapitalizations, dispositions, joint ventures, and minority investments. William has notable experience representing clients across a variety of sectors, including technology, media & telecommunications, financial services/fintech, and asset management. His clients have included both leading private equity firms such as Blackstone and KKR and prominent public and private companies, including Microsoft, Blue Buffalo Pet Products, NN, Inc., and Spotify. William was named a 2019 “Rising Star” by International Financial Law Review (IFLR), a 2021 “Rising Star” for Private Equity by Law360, and a 2021 “Top Rising Star” by The Deal.

Timeline

  • Partner

    Current role

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