Geoffrey C. Weien

Geoffrey Weien is a litigation associate in the Washington, D.C. office of Gibson, Dunn & Crutcher LLP, and practices in the firm’s Appellate and Constitutional Law, Class Action, Administrative Law, and Antitrust practice groups. Mr. Weien has represented firm clients in a wide variety of appellate and trial matters, including in particular several shareholder derivative actions and antitrust cases.

Representative matters include:

Appellate victory in the Supreme Court of Delaware on behalf of the directors of Allergan, Inc., for the principle that collateral estoppel bars Delaware courts from re-evaluating shareholder derivative claims that have previously been dismissed by another court.
Successful summary judgment briefing defending Intel Corporation against antitrust claims brought by the New York Attorney General.
Successful defense of The Boeing Company against charges brought by the National Labor Relations Board’s Acting General Counsel arising out of Boeing’s decision to open a new manufacturing facility in South Carolina.
Successful appellate and trial briefing defending an individual broker against claims brought by FINRA’s Department of Enforcement alleging that the broker had committed fraud in the auction rate securities market.
Successful defense of the directors of a biotech company against shareholder derivative claims brought in the Delaware Court of Chancery challenging director compensation and stock options practices.
Appellate briefing in a federal court of appeals defending the directors of a biotech company against shareholder derivative claims (outcome pending).
Defense of securities and shareholder derivative claims brought against a publicly traded IT company and the company’s directors (outcome pending).
Successful brief in opposition to a petition for a writ of certiorari in the U.S. Supreme Court in a case involving civil RICO claims.

Mr. Weien’s ongoing cases include a pending petition for a writ of certiorari in the U.S. Supreme Court regarding private antitrust suits challenging conditional rebates.

Mr. Weien joined the firm in 2008 after serving as a law clerk to Judge Priscilla R. Owen of the U.S. Court of Appeals for the Fifth Circuit. Mr. Weien graduated cum laude from Harvard Law School in 2007, where he was a Senior Editor of the Harvard Journal of Law & Public Policy. Mr. Weien also earned a Bachelor of Science degree cum laude from Rice University and a Master of Science degree from Stanford University. Mr. Weien served as a combat engineer officer in the U.S. Army from 1996–2000, and is a graduate of the U.S. Army’s Ranger, Sapper, Jumpmaster, and Airborne schools.

Mr. Weien is admitted to the bar in the District of Columbia and Virginia.

Good to know

Areas of Practice 1) Administrative Law and Regulatory Practice, 2) Antitrust and Competition, 3) Appellate and Constitutional Law and 4) Class Actions
Law School Harvard Law School, J.D., 2007
Education Rice University, B.S., 1996
Bar Member / Association District of Columbia Bar Association
Most recent firm Gibson, Dunn & Crutcher LLP
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