Antitrust lawyers

A. Jeff Ifrah

Jeff Ifrah’s legal skills and record of success have earned him international recognition as a white-collar criminal defense lawyer and litigator. He is an advocate keenly focused on delivering results for his clients – on understanding the problems they face and developing innovative strategies to resolve them. As the government expands the scope of statutes like RICO, The Computer Fraud and Abuse Act, and The Money Laundering Control Act in its investigations and prosecutions, white collar defendants are increasingly subject to higher monetary penalties and added jail time. Clients at the top of their fields turn to Jeff because of his ability to successfully manage, navigate, and negotiate high profile federal investigations. With a focus on government investigations, complex litigation, and white-collar defense, Jeff operates on the leading edge of matters involving the intersection of business and the internet. He represents companies and their senior executives in criminal and civil matters throughout the United States and also serves as a trusted business advisor to emerging industry clients doing business online. Leveraging his decades of experience in betting and wagering law, Jeff represents clients in the sports betting arena, including FanDuel, Delaware North, Sportradar, Bet365, Playtech, and Worldpay. He advises startups in the eSports space, including both real money and skill-based p2p competition sites, on compliance with both state and federal law. Jeff and his team also represent players and agents in the NFL, NBA, and NHL, and advise teams in MLS, the WNBA, and emerging sports leagues. Jeff cut his teeth as a trial lawyer and officer in the U.S. Army’s Judge Advocate General’s Corps and as trial counsel to the U.S. Army Communications-Electronics Command at Fort Monmouth. He then gained invaluable experience as a special assistant U.S. attorney in the U.S. Attorney’s office in New Jersey. He went on to become of counsel to the global law firm Paul Hastings and then a shareholder in the litigation department of another global firm, Greenberg Traurig. Often litigating cases against the federal government, he achieved a string of victories in cases involving criminal and civil antitrust laws, securities laws and the Civil False Claims Act. He defended some of the most well-known businesses in the country in industries such as pharmaceuticals, health care and technology. Jeff is a member of the Edward Bennett Williams Inn of Court, an invitation-only professional organization devoted to white collar practice that includes federal and local judiciary members in the District of Columbia, U.S. Department of Justice officials, and some of the most established defense attorneys in Washington, D.C. Jeff also serves as an Adjunct Professor for the UNH Franklin Pierce School of Law’s “Advanced Regulation of Sports Betting” course; the first-ever law school certificate program dedicated to the regulatory and legal aspects of sports wagering law and integrity issues. He is also active in the publishing arena. Jeff’s commentary has been featured in national media like The Baltimore Sun, and he is a frequent speaker at industry events around the world like the Esports Bar Association Convention. A leading national authority in federal sentencing laws, Jeff is co-author of Federal Sentencing for Business Crimes, the only comprehensive treatise on federal sentencing in the context of business and white-collar crimes.

Ifrah Law

Aaron Chiu

Aaron Chiu defends sophisticated clients in complex, enterprise-defining antitrust disputes and advises on emergent and antitrust issues. Aaron leverages experience litigating marquee matters that test antitrust law’s boundaries and his acutely commercial focus to represent market-leading clients in precedent-setting cases involving: Antitrust risks for digital platforms Issues at the intersection of sports and antitrust Sprawling class actions He advises household names on preserving their ability to innovate while limiting the risk of litigation or investigation. Aaron regularly handles complex cases in sports, entertainment, and technology, defending clients from plaintiffs’ evolving theories. Aaron maintains an active pro bono practice, regularly handling appeals through the Ninth Circuit’s Pro Bono Program. As an active member of the American Bar Association’s Antitrust Law Section, he serves on its Joint Conduct Committee and on the Editorial Board for its Antitrust Law Developments treatise. Aaron also participates on the Education Subcommittee of the California Lawyers Association’s Antitrust and Unfair Competition Law Section. Aaron served as a law clerk to Judge Johnnie B. Rawlinson of the US Court of Appeals for the Ninth Circuit.

Latham & Watkins

Abbe Dienstag

Counsel, New York

Herbert Smith Freehills Kramer

Abdallah Elmasry

Junior Associate

Soliman, Hashish & Partners

Abram Ellis

Abram Ellis is a Litigation Partner in the Firm’s Washington, D.C. office who is recognized as a “Rising Star” and “Next Generation Partner” in antitrust litigation and cartels. His antitrust practice comprises all aspects of competition law, from defending clients against complex class action antitrust litigation to helping clients obtain regulatory clearance from domestic and international competition authorities for significant transactions. Abram is particularly experienced in antitrust litigation involving complex financial instruments, the healthcare industry and employment issues. In addition to his robust antitrust practice, Abram advises clients on a range of litigation and regulatory matters. As Co-Head of the Firm’s International Trade Regulation Practice, he advises leading private equity funds, financial institutions and major corporations on regulatory and compliance matters relating to cross-border activities, including with respect to tariffs, anti-money laundering, OFAC, FCPA, the Outbound Investment Rule, the DOJ’s Data Security Program and export matters. Recent representations include: RPM International and the Euclid Chemical Company in winning the dismissal of an antitrust class action; JPMorgan in summary judgement in a LIBOR lawsuit; and separately, JPMorgan in obtaining the Ninth Circuit’s affirmance of dismissal in an ICE LIBOR lawsuit against several major banks, which was named “Litigation of the Year – Cartel Defense” at GCR Awards 2025; and Change Healthcare in its $13.8 billion acquisition by UnitedHealth Group, which was named “Merger Control Matter of the Year – Americas” at Global Competition Review’s GCR Awards 2023.

Simpson Thacher & Bartlett LLP

Adam B. Wolfson

Quinn Emanuel Urquhart & Sullivan, LLP

Adam Di Vincenzo

Adam J. Di Vincenzo is a partner in Gibson Dunn's Antitrust and Competition Law Practice Group. He has extensive experience representing clients in government antitrust investigations, particularly investigations involving proposed mergers, acquisitions, and joint ventures.

Gibson, Dunn & Crutcher LLP

Adam Hemlock

Partner

Weil, Gotshal & Manges LLP

Adam Hunt

Adam J. Hunt | Morrison Foerster Adam J. Hunt is a partner in the Litigation Department of Morrison Foerster’s New York office. His practice focuses on complex litigation, with an emphasis on class action and commercial litigation. Mr. Hunt has extensive experience representing consumer products companies, financial institutions, and technology firms in class action cases and complex commercial disputes before state and federal trial courts, as well as in arbitrations. Clients seek Mr. Hunt’s counsel for his creative, strategic thinking in high-stakes, high-profile matters. He has represented clients facing claims under false advertising, antitrust, and privacy laws throughout the country, securing wins at the pleading stage, summary judgment, and trial, in addition to negotiating favorable settlements, often early in the case. Representative experience includes successfully securing rulings dismissing two putative false advertising class action cases against one of the best-known consumer electronics companies in the world; obtaining a complete win on summary judgment for a major shipping and logistics company in a multimillion-dollar commercial dispute; appearing as counsel at trial for a leading financial institution in a $100 million commercial dispute, winning a bench trial verdict; and prevailing on motions to dismiss false advertising class actions against a leading Greek yogurt company. Mr. Hunt is also an editor of the firm’s Class Dismissed blog, which provides insights, recommendations, and timely reports on the latest defense news, developments, and trends in the most current class action lawsuits that affect consumer-facing companies. Mr. Hunt maintains an active pro bono practice and is the recipient of the New York State Bar Association’s 2017 President’s Pro Bono Service Award for the First Judicial Department, the 2018 Public Service Award from New York University School of Law, and Morrison Foerster’s Kathi Pugh Award for Pro Bono Services. Mr. Hunt received his B.A. with honors from Swarthmore College and his J.D. cum laude from New York University.

Morrison Foerster

Adam Shapira

Partner

Meitar Law Offices

Adam Stern

Partner - Litigation and Investigations

Bryan Cave Leighton Paisner

Adam Swain

Unparalleled track record as first-chair litigator at the ITC representing both complainants and respondents throughout myriad proceedings. This includes obtaining sweeping relief against patent infringers and gray-market importers and defending bet-the-company product lines from exclusion. Notably, he has been at the forefront of non-patent claims at the ITC as well, including successful outcomes in antitrust, trademark, and trade secret disputes. Adam also has extensive experience in enforcing ITC orders both before Customs and the ITC, and was part of the team that won the largest ITC penalty award in history. Practice involves a range of technologies, including mobile phones, standard-essential patents, industrial automation, digital television, medical products, and hydraulic fracturing.

Alston & Bird LLP

Adriana Giannini

Adriana Giannini is a partner in the Antitrust practice of Tauil & Chequer Advogados in association with Mayer Brown in the São Paulo Office.

Tauil & Chequer Advogados

Aidan Synnott

Click here for attorney bio.

Paul, Weiss, Rifkind, Wharton & Garrison LLP

Aimee DeFilippo

Partner

Jones Day

Aimen Mir

Partner

Freshfields

Akira Inoue

Partner

Baker McKenzie (Gaikokuho Joint Enterprise)

Akira Karasawa

Partner

Iwata Godo

Al Pfeiffer

Alfred C. Pfeiffer, Jr., former Global Vice Chair of Latham’s Litigation & Trial Department and former Co-Chair of the Antitrust & Competition Practice, represents clients in civil antitrust matters and other complex commercial disputes. Al, a trial lawyer, represents Fortune 500 companies across industries in high-stakes antitrust and complex commercial litigation. Drawing on more than 30 years of trial experience, he guides clients to successful resolutions, regularly winning at all stages of litigation, including when cases go to trial. He has developed a particular focus on antitrust claims involving dominant firm conduct. Al's work includes representing clients, as both plaintiffs and defendants, in dozens of jurisdictions across the country, including: Federal district courts United States Courts of Appeal for the Eighth, Ninth, Tenth, and Eleventh Circuits Arbitration tribunals He has also successfully represented clients involved in investigations conducted by the US Department of Justice and the California Attorney General. Al has been active for many years in the leadership of the ABA’s Section on Antitrust. He serves on the Long Range Planning Committee and previously served on the leadership Council, as chair of the Intellectual Property Committee, on the Committee Operations Task Force, and as chair of the Communications Industry Committee. He co-authored the ABA Antitrust Section’s Telecom Antitrust Handbook.

Latham & Watkins

Alan J. Devlin

Alan Devlin, former Acting Deputy Director of the FTC’s Bureau of Competition, represents world-leading clients in their most sophisticated antitrust and competition matters, with a particular focus on merger control. Alan combines his understanding of economics with commercial pragmatism to advise on all aspects of antitrust law, including: Global merger clearance Antitrust litigation and appeals Government investigations, including FTC 6(b) industry studies Leveraging his extensive FTC experience, he infuses an awareness of agency priorities into the earliest stages of a client’s merger agreement and guides them through their most sophisticated antitrust matters. A recognized thought leader, Alan has authored three books — Reforming Antitrust (Cambridge Univ. Press 2021), Antitrust & Patent Law (Oxford Univ. Press 2016), and Fundamental Principles of Law & Economics (Routledge 2014) — and over 30 law review articles, many of which have been cited in cases or have won awards. Alan teaches antitrust as an adjunct professor at Georgetown University Law Center and has previously taught courses on law and economics, innovation policy, competition, and intellectual property. Alan received a doctorate (J.S.D.), focusing on antitrust law and economics, under the supervision of Judge Richard A. Posner. He subsequently clerked for the late Judge Richard D. Cudahy of the US Court of Appeals for the Seventh Circuit and for Judge Amy J. St. Eve of the US District Court for the Northern District of Illinois (now of the US Court of Appeals for the Seventh Circuit).

Latham & Watkins

Alan Klein

Principal

Offit Kurman

Alan Ramírez Casazza

Partner

Hogan Lovells

Alberto Estrella

Managing Member

Estrella LLC

Alec Burnside

Partner

Dechert LLP