Robert B. Tannenbaum

Robert Tannenbaum is a trial lawyer who represents clients around the country in complex disputes including class actions, mass tort litigation, securities fraud litigation, and commercial disputes. Robert also specializes in complex financial cases for Fortune 100 companies, hedge funds, and accounting firms. Most recently, Robert was a lead member of a trial team that obtained a full dismissal of multiple cases alleging that Walgreens was responsible for injuries suffered by children born with neonatal abstinence syndrome as a result of prenatal exposure to opioids.

Robert graduated from the University of Chicago Law School with High Honors as a Kirkland and Ellis Scholar and earned his bachelor's degree from the University of Chicago, majoring in economics. Before joining the firm in 2013, Robert clerked for the Honorable Diane P. Wood, United States Court of Appeals for the Seventh Circuit.

Cases Tried or Otherwise Taken to Judgment

Las Vegas Hepatitis C Litigation (District Court, Clark County, Nevada)
Lead counsel and trial counsel for defendants. Provided strategic direction, coordinated trial teams, and spent thirty days on trial, in litigation encompassing over forty individual cases, pending before twenty different judges in state court in Las Vegas. Plaintiffs were individuals who claimed to have contracted Hepatitis C during endoscopy procedures performed at clinics that were on defendants' networks of approved healthcare providers. Defendants were health plans and other entities affiliated with UnitedHealthcare. Bartlit Beck tried one case (Martin v. PacifiCare of Nevada, et al.), resulting in a favorable jury verdict and subsequent settlement of half of the pending cases. Bartlit Beck began trying a second case (Paul v. Health Plan of Nevada, et al.), which settled one month into trial.

Other Representative Cases

In re Valeant Pharmaceuticals International, Inc. Securities Litigation (D. N.J.)
Trial counsel for PricewaterhouseCoopers in multibillion-dollar securities class action brought by putative class of investors who allege accounting fraud by Valeant and challenge PwC’s audit of Valeant’s financial statements.

Elliott Associates L.P. v. AbbVie Inc. (Circuit Court, Chicago, Illinois)
Lead counsel for various investment funds in fraud actions arising from AbbVie's aborted $50 billion acquisition of Shire in 2014. 

Opioids Litigation
Part of the team defending Walgreens in nationwide litigation relating to the distribution and sale of prescription opioid medications, including over 2,500 cases brought by states, cities, counties, tribes, and private parties seeking recovery in connection with the opioid abuse crisis.

Aimco v. La Jolla Cove (Superior Court, San Diego, California)
Lead counsel for Aimco in a tortious inference case arising from competing claims to a piece of oceanfront commercial real property in La Jolla, California.

Snow v. Align Technology (N.D. Cal.)
Representing Align Technology, Inc. in putative antitrust class action brought by a class of purchasers of aligners alleging anticompetitive agreements. Case pending.

Divorce Litigation
Co-lead counsel in divorce and related proceedings challenging the validity of a premarital agreement entered into prior to marriage by a multi-billionaire and his spouse. Matter settled during court-initiated negotiations at the start of trial.

Drapeau v. Citadel (D. Vt.)
Lead counsel for Citadel in a securities fraud case relating to an exchange-traded fund. Case was dismissed.

United States v. Microsoft Corp. (W.D. Wash.)
Trial counsel for Microsoft in summons-enforcement actions that the United States initiated in connection with the IRS's audit of Microsoft.