Thomas Lang is a partner in the Antitrust and Competition Practice Group of Haynes and Boone, LLP. He focuses his practice on antitrust litigation and merger reviews. His litigation experience includes class actions, price fixing, predatory pricing, intellectual-property-related antitrust issues, monopolization, state court indirect purchaser litigation, federal multidistrict litigation, and civil and criminal investigations by the Federal Trade Commission (FTC) and the Department of Justice (DOJ).

From 2006 to 2008, Tom served as Senior Litigation Counsel in the FTC's Bureau of Competition. In this position, he led FTC trial teams in several high-profile FTC merger matters, including challenges to mergers in the healthcare (FTC v. Inova Health Systems), gasoline refining (FTC v. Foster), and supermarket (FTC v. Whole Foods Markets) industries.

Tom taught "Antitrust Issues in Mergers and Acquisitions" as Cornell Law School's Distinguished Practitioner in Residence during the Fall of 2008. He has written numerous articles on antitrust issues and has also provided commentary on a variety of antitrust topics on numerous ABA and law school panels.