Atty. Leon B. Greenfield
Leon B. Greenfield has an exceptionally wide breadth of experience representing clients in complex antitrust-related matters.
Profile Summary
About Leon B. Greenfield at a glance
Leon B. Greenfield is an attorney based in Washington, District of Columbia, practicing at Wilmer Cutler Pickering Hale and Dorr LLP. Admitted to practice in District of Columbia, The District of Columbia Bar. Educated at University of Chicago (J.D., 1989) and Penn State (BS, 1986). Recognitions include Best Lawyers in America — Antitrust Law (2026), Best Lawyers in America — Additional Areas of Practice: (2026), and Best Lawyers in America — Litigation - Intellectual Property (2026). Serands clients in Washington, DC and the surrounding metropolitan area.
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About
- Leon B. Greenfield has an exceptionally wide breadth of experience representing clients in complex antitrust-related matters
- He has represented clients in cutting edge Section 2 litigation and agency matters
- He has secured antitrust clearance for major acquisitions, litigated cases in federal and state court and counseled clients on many types of antitrust issues
- Mr. Greenfield also has broad experience in matters outside the antitrust area, including securities regulatory matters and litigation and complex business litigation
Jurisdictional Context
Why local counsel matters in District of Columbia
Practicing law in District of Columbia. Legal matters in District of Columbia are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Washington are typically filed in the local municipal court or the appropriate District of Columbia state district court, depending on subject matter and amount in controversy. An attorney licensed in District of Columbia brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in District of Columbia courts without local counsel or pro hac vice admission.
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