Global life sciences and technology companies, private equity sponsors, sports organizations, and consumer-facing brands routinely entrust Sidley Austin LLP with their most impactful disputes. The department is spearheaded by Chicago’s Bruce Braun who orchestrates contract, fraud, and governance battles, and Angela Zambrano in Dallas, who has notable strength in antitrust, class actions, and arbitration strategy. The practice draws on a deep pool of talent, including Dallas’ Yvette Ostolaza, who excels in securities and shareholder litigation; Los Angeles’ Rollin A. Ransom, who takes point on high-profile entertainment and media disputes, including defamation claims; and New York’s Nancy Chung, who navigates business-critical commercial matters. In Chicago, David Gordon excels in class actions and insurance-related disputes. Brienne Letourneau and Matthew Devine departed the firm in February 2025.
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Key clients
- Novo Nordisk, Inc.
- The Big 12 Conference, Inc.
- Charles Schwab & Co., Inc.
- Forterra, Inc.
- Huawei Technologies Co., Ltd.
- Leon Capital Group
- Match Group
- Nelson Brothers LLC
- Petsmart, Inc.
- UMG Recordings, Inc. (Universal Music Group)
- Warner Music Group
- XRI Holdings, LLC
Work highlights
Secured a full defense verdict and victory for client Novo Nordisk against false claims allegations involving its hemophilia drug NovoSeven.
Thwarted defamation claims against client Universal Music Group in a headline-grabbing lawsuit brought by Grammy-winning artist Drake.
Achieved a first-of-its-kind settlement as well as a dismissal with prejudice for The Big 12 Conference in a series of groundbreaking antitrust lawsuits concerning student-athlete compensation.
Practice head
Bruce Braun; Angela Zambrano
Other key lawyers
Yvette Ostolaza; Rollin A. Ransom; Nancy Chung; David Gordon