
McDermott Will & Emery LLP demonstrates a proven ability to defend its clients against challenges from the FTC, DOJ, and state attorneys general by delivering robust defenses in complex antitrust matters. A key differentiator for the practice is its deep expertise in healthcare and technology, encompassing complex monopolization litigation and extensive investigations into alleged anticompetitive conduct. Raymond Jacobsen, Jon Dubrow, and Ryan Tisch serve as co-chairs from the Washington DC, office. Michelle Lowery, who splits her time between Los Angeles and Chicago, is a skilled litigator with notable expertise in healthcare, tech, and manufacturing antitrust disputes. Stephen Wu is recognized for the strength of his defense in federal courts across the US. Katherine O’Connor focuses her active practice on litigation and investigations in the healthcare and labor markets. Both Wu and O’Connor are based in Chicago.
Legal 500 Editorial commentary
Accolades
Client satisfaction
Key clients
- American Express
- Apple
- Cigna
- Credit Suisse
- Dr.First
- Eileen Fisher
- Envision Healthcare Corporation and Envision Physician Services
- Motorola Mobility
- Veradigm
Work highlights
- Representing Cigna in a sprawling multi-district antitrust litigation involving algorithmic pricing platforms.
- Assisting the client with an antitrust litigation involving claims of monopolization.
- Representing the client in a civil class action which is pending in the Northern District of Illinois.
Lawyers
Next generation partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Practice head
Raymond Jacobsen; Jon Dubrow; Ryan Tisch
Other key lawyers
Michelle Lowery; Stephen Wu; Katharine O'Connor; Nicole Castle; Anthony Ferrara; Zachary Sproull