Wachtell Lipton was founded on a handshake in 1965 as a small group of lawyers dedicated to providing advice and expertise at the highest levels. We have achieved extraordinary results following the distinctive vision of our founders -- a cohesive team of lawyers intensely focused on solving our clients' most important problems.
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We have experience in the fields of mergers and acquisitions, strategic investments, takeovers and takeover defense, corporate and securities law and corporate governance. We handle some of the largest, most complex and demanding transactions in the United States and around the world.
Wachtell Lipton is dedicated to providing advice and expertise at the highest levels and achieving extraordinary results for our clients. We seek individuals who are talented, motivated and committed in order to maintain our record of excellence.
Allen, William T.
Of Counsel, Corporate
tel 212.403.1261
fax 212.403.2261

William T. Allen is of counsel in the Corporate Department at Wachtell, Lipton, Rosen & Katz. In that capacity, he consults on matters of corporation law and corporate governance with members of the firm and its clients. Since 1997, William Allen has served as the Jack H. Nusbaum Professor of Law & Business at New York University where he is also the founding director of the NYU Pollack Center for Law & Business, a center designed to serve as an academic bridge between the NYU School of Law and the NYU Stern School of Business.

From 1985 to 1997, Judge Allen was the chancellor of the Delaware Court of Chancery. As chancellor, he wrote hundreds of corporate law judicial opinions. Notable among these were the Caremark case, which addressed the duty of corporate directors to monitor corporate legal compliance; the Time-Warner case that addressed the board's ability to resist a hostile offer while it was seeking to effectuate its own business plan; and the Blasius case, which announced a heightened standard of judicial review when director action sought to interfere with a shareholder vote.

While a judge, William Allen taught corporation law and corporate governance as a visiting professor at Stanford Law School and the University of Pennsylvania Law School. In 1996, he served as Rabin lecturer at Yale Law School.

Judge Allen writes, consults and lectures on corporate law, mergers and acquisitions and corporate governance.  His writings on corporate law and governance are numerous, including the widely adopted student text, "Commentaries and Cases on the Law of Business Organization," co-authored with Harvard Law School professors Reinier Kraakman and Guhan Subramanian (5th ed. 2016, Wolters Kluwer Law & Business Publishing).  Judge Allen received his B.S. from New York University, his J.D. from the University of Texas and a honorary doctorate degree LL.D. from Dickinson Law School.  He is a member of the American Law Institute and a member of the American Academy of Arts & Sciences, among other professional organizations.

Recent Publications

  • Commentaries and Cases on the Law of Business Organization 5th ed.,
    Wolters Kluwer Law & Business, 2016.