FacultyFaculty/Author Profile

Hon. Jack B. Jacobs

Sidley Austin LLP
Senior Counsel
Wilmington, DE, USA

JACK JACOBS has over 45 years of legal experience most notably serving on the Delaware Supreme Court from 2003 – 2014, and before that, as Vice Chancellor of the Delaware Court of Chancery since 1985.

Before his appointment as Vice Chancellor, he practiced corporate and business litigation in Wilmington, since 1968. Mr. Jacobs is currently an Adjunct Professor of Law at the Law Schools of New York University, Columbia University, Vanderbilt University and the University of Pennsylvania. Since joining Sidley, he advises companies and boards of directors on Delaware law issues, including fiduciary duties and with respect to mergers and acquisitions, and is available for Special Committee and Special Litigation Committee investigations in response to shareholder demands or government requirements.


- Complex Commercial Litigation
- Corporate Governance and Executive Compensation  
- M&A
- Securities and Shareholder Litigation


- Business Torts
- Commercial Litigation Appeals
- Contract Litigation
- D&O Liability/Shareholder Derivative Litigation
- Financial, Securities and Accountants Liability Appeals
- Insurance  Insolvency
- Insurance M&A
- Internal Investigations
- M&A Litigation
- Private Securities Litigation
- Products Liability and Class Actions Appeals
- Trials
- Trust and Estate Litigation


“Does The New Corporate Shareholder Profile Call For A New Corporate Law Paradigm?,”  Fordham Journal of Corporate & Financial Law, Vol. 18, (2012).

“’Patient Capital’: Can Delaware Corporate Law Help Revive It?,”  Washington & Lee Law Review, Vol. 68, (2011).

“The Evolution Of Hostile Takeover Regimes In Developed And Emerging Markets: An Analytical Framework,”  Harvard International Law Journal, Vol. 51, No. 1, (2011).

“The Reach of State Corporate Law Beyond State Borders: Reflections Upon Federalism,”  New York University Law Review, Vol. 84, (2009).

“The Vanishing Substance-Procedure Distinction In Contemporary Corporate Litigation,”   Suffolk University Law Review, Vol. 41, (2007).

“The Fiduciary Duty of Disclosure After Dabit,”  Maryland Journal of Business & Technology, Vol. 2, (2007).

“Implementing Japan’s New Takeover Defense Guidelines: Part II,”    University of Tokyo Journal of Law & Politics, Vol. 3, (2006).

"Implementing Japan’s New Anti-Takeover Defense Guidelines, Part I,"  New York University Journal of Law & Business, Vol. 2, (2006).

"The Uneasy Truce Between Law & Equity In Modern Business Enterprise Jurisprudence," Delaware Law Review, Vol. 8, (2005).

“Entity Rationalization: A Judge’s Perspective,”    Business Lawyer, Vol. 58, (2003).

(Co-authored with) William T. Allen and Leo E. Strine, Jr., "Realigning The Standard of Review of Director Due Care With Delaware Public Policy: A Critique of Van Gorkum & Its Progeny as a Standard of Review Problem," Northwestern University Law Review, Vol. 96, (2002).

(Co-authored with) William T. Allen and Leo E. Strine, Jr., "The Great Takeover Debate: A Meditation On Bridging The Conceptual Divide," University of Chicago Law Review, Vol. 69, (2002).

(Co-authored with) William T. Allen and Leo E. Strine, Jr., "Function Over Form: A Reassessment of Standards of Review in Delaware Corporate Law," Delaware Journal of Corporate Law 859, Vol. 26, (2001). (Also published as Business Lawyer, Vol. 56), (2001).

“Comments on Contestability,”  University of Miami Law Review, Vol. 54, (2000).


Mr. Jacobs is a member of the American Law Institute and served as an advisor to the Restatement (3rd) of Restitution project, and currently, on its Principles of the Law of Liability Insurance project. He is also a member of the Delaware and American Bar Association, fellow of the American Bar Foundation and an Advisory Board Member of the Rand Center for Corporate Ethics and Governance.

Mr. Jacobs has participated in academic symposia and continuing legal education programs related to corporate and securities law sponsored by various law schools and continuing legal education programs related to corporate and securities law. He also has been a guest lecturer at numerous American and foreign law schools, having delivered the Distinguished Jurist Lecture at the University of Pennsylvania Law School; the Regent’s Lecture in Residence at the UCLA Law School; and the William J.  Brennan Lecture at NYU School of Law. He was the Distinguished Visiting Jurist at the Harvard Law School Corporate Governance Program, serves as a member of the Board of Advisors of the University of Pennsylvania Law School Institute for Law and Economics, and as a member of the advisory board of the Harvard Law School Program on Corporate Governance.


- U.S. Supreme Court, 1975

- U.S. Court of Appeals, 3rd Circuit, 1968

- U.S. District Court, District of Delaware, 1968

- Delaware, 1968


- Widener University School Law - Delaware, LL.D., 2011

- Harvard Law School, J.D., 1967 The University of Chicago, B.A., 1964


- William Duffy, Delaware Court of Chancery (1967)

- Albert J. Stiftel, Superior Court of Delaware (1967)


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