Thompson Coburn LLP is a U.S. law firm with offices in Chicago, Dallas, Los Angeles, New York, Southern Illinois, St. Louis, Birmingham, Ala., and Washington, D.C.[3][4] The firm has been especially active in the field of product liability.

[citation needed] In July 2007 Thompson Coburn merged with Fagel Haber of Chicago.

[1][8] In July 2021, Thompson Coburn combined with Hahn & Hessen and opened a new office in New York.

[9] The Hahn & Hessen addition expanded the firm's capabilities in representing financial institutions and other financial market participants in commercial finance, bankruptcy, workouts, and complex litigation.

[10] In November the firm was sued in a class action for its role in a data breach with its client Presbyterian Healthcare Services.