Michael J. O'Mara
Partner
Michael O’Mara represents clients in all areas of antitrust law, including litigation, merger control, investigations, and counseling. He has experience with both domestic and cross-border M&A transactions, representing clients before the U.S. Department of Justice, Federal Trade Commission, and competition regulators in Europe, China, Korea, Japan, India, and other jurisdictions.
Michael J. O'Mara
Partner
Michael O’Mara represents clients in all areas of antitrust law, including litigation, merger control, investigations, and counseling. He has experience with both domestic and cross-border M&A transactions, representing clients before the U.S. Department of Justice, Federal Trade Commission, and competition regulators in Europe, China, Korea, Japan, India, and other jurisdictions.
Prior to attending law school, Michael worked as a research assistant for the New England Public Policy Center at the Federal Reserve Bank of Boston. During his work he assisted with economic and public policy research primarily focused on issues of demographic and labor force trends and state and local public finance.
Experience
- Representing Tyson Foods in treble-damage class action litigations and regulatory investigations alleging industry-wide conspiracies to raise the prices of broiler chickens.
- Represented McKesson in its $2.49 billion acquisition of a controlling interest in Florida Cancer Specialists’ Core Ventures.
- Represented Silver Lake Partners LP in the merger of its sports marketing company IMG College with Learfield.
- Represented Johnson Controls in its $2 billion sale of Scott Safety to 3M.
- Represented Stanley Black & Decker in its $900 million acquisition of Craftsman from Sears.
- Represented Dell Technologies in its $67 billion acquisition of EMC.
- Represented Stanley Black & Decker in its successful defense of Section 1 group boycott claims brought by rival table saw manufacturer.
Honors
- Lawdragon, “500 Leading Antitrust & Global Competition Lawyers” (2025)
- Lawdragon, "500 X – The Next Generation" (2024)
- Super Lawyers, “Rising Stars” for Mergers & Acquisitions (2017 – 2024)
- Empire State Counsel Honoree for pro bono service (2017)
Education
- JD, cum laude – Duke University (2013)
- AB, with Honors – Brown University (2007)
Admissions
- District of Columbia
- New York
- U.S. District Court Northern District of Illinois
Quotes
Axinn's attorneys are dedicated antitrust lawyers who understand every part of a case.
The Legal 500 United States
Their knowledge of the industry, law, and implications is deep and thoughtful. The quality of the work...is first-rate.
Chambers USA
News & Insights
News & Insights
Intellectual Property and Antitrust
Byline Articles
Intellectual Property
Informa CompLaw Nordic 2025
Speaking Engagement
Antitrust
Key Questions for Navigating the Changing Competition Landscape in the Nordics and EU
Axinn Viewpoints
Antitrust
Axinn Attorneys Named to Lawdragon 500 Leading Antitrust & Global Competition Lawyers Guide
Awards & Recognitions
Antitrust
Axinn Promotes Michael O’Mara to Partner, Lindsey Strang Aberg, Ali Vissichelli, Eva Yung to Counsel
News
Antitrust
Axinn Advises McKesson in Securing Controlling Interest in Core Ventures
Deals & Cases
Antitrust
Axinn Attorneys Named to 2024 Lawdragon 500 X – The Next Generation
Awards & Recognitions
Antitrust
Intellectual Property and Antitrust
Byline Articles
Antitrust
Two Axinn Thought Leadership Pieces Nominated for the Antitrust Writing Awards
Awards & Recognitions
Antitrust
United States: How Antitrust Agencies are Increasing Merger Control in Big Data
Publications
Antitrust
