Pillsbury Winthrop Shaw Pittman LLP advises on a range of industries, managing high-stakes antitrust matters with strategic efficiency that clients value. It covers litigation, government investigations, and counseling on day-to-day business practices, as well as mergers, acquisitions, and joint ventures, including premerger review processes. Michael Sibarium, who is based in Washington, DC, handles antitrust, trade regulation, and commercial matters across federal and state forums. Jacob Sorensen, operating in San Francisco, regularly serves as lead counsel in high-profile and sensitive antitrust matters, combining trial and appellate experience with strategic guidance.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Testimonials
Collated independently by Legal 500 research team.
- They excel at providing clear, strong leadership, need-to-know guidance for complete newcomers, along with timely suggestions, precise advice, and realistic assessments of case prospects based on their deep experience in antitrust litigation.
- Compared with law firms in other jurisdictions, this firm excels at providing clear, need-to-know guidance for complete newcomers, along with timely suggestions, precise advice, and realistic assessments of case prospects based on its deep experience in antitrust litigation. This is particularly valuable for clients who are new to antitrust matters. While their fees are not low, I consider their services to be highly cost-effective.
Key clients
- Engel & Volkers America’s Inc, Engel & Volkers, GmbH (Germany), Engle & Volkers New York Real Estate LLC
- Joint representation of Barnard College, Oberlin College, Pomona College, Trinity College, Vassar College
- Thor Solutions, LLC
- The Board of Trustees of the Leland Stanford Junior University
- PG&E, Energy Northwest
- Stanford Health Care, Stanford Health Care Tri-Valley, Lucile Packard Children’s Hospital at Stanford, Stanford Blood Center, LLC, University Healthcare Alliance (dba Stanford Medicine Partners), and Packard Children’s Health Alliance
- Lucile Packard Children’s Hospital at Stanford (LPCH)
- CBR Systems, Inc.
- Salesforce, Inc.
- The Cooper Companies, Inc., CooperSurgical, Inc., CooperGenomics, Inc.
- Stanford University
- Hilton Grand Vacations Inc.
- Bass Pro Shops
- TickPick LLC
- Engel & Volkers America’s Inc, Engel & Volkers, GmbH (Germany), Engle & Volkers New York Real Estate LLC
- Joint representation of Barnard College, Oberlin College, Pomona College, Trinity College, Vassar College
- Thor Solutions, LLC
- The Board of Trustees of the Leland Stanford Junior University
- PG&E, Energy Northwest
- Stanford Health Care, Stanford Health Care Tri-Valley, Lucile Packard Children’s Hospital at Stanford, Stanford Blood Center, LLC, University Healthcare Alliance (dba Stanford Medicine Partners), and Packard Children’s Health Alliance
Work highlights
Representing PG&E and Energy Northwest in an antitrust class action filed in July 2025 targeting nearly the entire U.S. nuclear operator sector.
Representing Engel & Völkers America’s Inc., Engle & Völkers Gmbh, and Engles & Völkers New York Reals Estate LLC in antitrust class actions challenging real estate commission rules adopted by the National Association of Realtors and other multiple listing services in federal courts in Missouri, Atlanta, New York, and most recently Chicago.
Represents Stanford in connection with a federal antitrust claim alleging financial aid price fixing by 40 universities.
Practice head
Michael Sibarium; Jacob R. Sorensen
Other key lawyers
Lee Brand; Nan McGarry