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Antitrust Litigation

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  • 360-Degree Strategic Insight

    With extensive experience representing clients on both the defense and plaintiff sides of highly sensitive and reputationally impactful antitrust litigation, we have honed our ability to assess nuanced claims and craft tailored strategies unique to each case.

  • Advocacy Backed by Industry Knowledge

    Our practice provides clients with extensive experience across industries, including technology, life sciences and pharmaceuticals, industrials, media, transportation, retail, gaming, and cutting-edge AI-enabled software platforms, among others. Our team’s comprehensive understanding of market dynamics enables us to deliver powerful advocacy to secure positive outcomes.

  • Entrusted with High-Profile Matters

    Clients trust our team with their highest-profile matters, including defending against complex class actions, opt-out cases brought by significant customers, and cases brought by the Federal Trade Commission, U.S. Department of Justice (DOJ), or State Attorneys General. On the plaintiff side, Wilson Sonsini is viewed as the go-to firm for bringing tough cases and getting successful results.  

  • Proven Litigation Talents Valued by Clients and Recognized in the Market

    Clients commented in Chambers USA: “Their litigation skills are exemplary. They demonstrated unparalleled advocacy, preparation, and confidence in the courtroom.” Wilson Sonsini’s antitrust litigation practice has been recognized across leading industry publications, including by AmLaw “Antitrust Litigation Department of the Year,” Law360 “Competition Group of the Year,” and Global Competition Review “Litigation of the Year” and “Litigation of the Year (Non-Cartel Prosecution).”

Wilson Sonsini’s Antitrust Litigation practice brings extensive and diverse experience across a wide range of antitrust claims, including monopolization, price fixing, exclusive dealing, tying arrangements, predatory pricing, and other forms of restraint of trade. Our attorneys are routinely hired to represent companies facing their most critical challenges, whether defending against antitrust allegations, leading joint defense groups in expansive class actions, or pursuing claims against competitors. We are consistently called upon to represent clients in high-profile matters involving cutting-edge antitrust issues, including but not limited to, algorithmic pricing, labor and no-poach, self-preferencing, group boycotts, standard-setting, pricing and distribution practices, and the scrutiny of platforms. Wilson Sonsini’s antitrust litigators: 

  • serve as trial counsel for company plaintiffs and defendants, including a significant docket of federal class actions and “follow-on” cases after government enforcement;
  • defend companies and secure dismissals or summary judgment in competitor litigation, class actions, and non-class actions;
  • represent company plaintiffs in cutting-edge litigation matters brought against competitors;
  • rely on substantial government experience to solve problems for clients and support their business goals; and
  • coordinate across jurisdictions to ensure clients’ global strategies are aligned.

Wilson Sonsini’s Antitrust Litigation practice consistently wins cases brought under the Sherman Act Sections 1 and 2, Clayton Act, Robinson-Patman Act, and state competition and consumer protection statutes. We have successfully represented clients in defense of antitrust claims seeking large treble damages awards that threaten the viability of their businesses. We’ve won motions to dismiss and motions for summary judgment, defeated class certification, and successfully handled appeals, and we stand ready to represent companies at every phase of litigation.

In addition to a successful track record in class action and treble damages cases—particularly in multidistrict litigation (MDLs), our attorneys have a wealth of experience in antitrust cases that raise novel and complex intellectual property issues. Our knowledge, in combination with Wilson Sonsini’s unparalleled patent litigation experience, has led to numerous client victories. We have represented clients in cases where we defended business practices that raised cutting-edge antitrust concerns, including claims challenging IP licensing practices, standard-setting activities, and patent pools.  

Overview

Wilson Sonsini’s Antitrust Litigation practice brings extensive and diverse experience across a wide range of antitrust claims, including monopolization, price fixing, exclusive dealing, tying arrangements, predatory pricing, and other forms of restraint of trade. Our attorneys are routinely hired to represent companies facing their most critical challenges, whether defending against antitrust allegations, leading joint defense groups in expansive class actions, or pursuing claims against competitors. We are consistently called upon to represent clients in high-profile matters involving cutting-edge antitrust issues, including but not limited to, algorithmic pricing, labor and no-poach, self-preferencing, group boycotts, standard-setting, pricing and distribution practices, and the scrutiny of platforms. Wilson Sonsini’s antitrust litigators: 

  • serve as trial counsel for company plaintiffs and defendants, including a significant docket of federal class actions and “follow-on” cases after government enforcement;
  • defend companies and secure dismissals or summary judgment in competitor litigation, class actions, and non-class actions;
  • represent company plaintiffs in cutting-edge litigation matters brought against competitors;
  • rely on substantial government experience to solve problems for clients and support their business goals; and
  • coordinate across jurisdictions to ensure clients’ global strategies are aligned.

Wilson Sonsini’s Antitrust Litigation practice consistently wins cases brought under the Sherman Act Sections 1 and 2, Clayton Act, Robinson-Patman Act, and state competition and consumer protection statutes. We have successfully represented clients in defense of antitrust claims seeking large treble damages awards that threaten the viability of their businesses. We’ve won motions to dismiss and motions for summary judgment, defeated class certification, and successfully handled appeals, and we stand ready to represent companies at every phase of litigation.

In addition to a successful track record in class action and treble damages cases—particularly in multidistrict litigation (MDLs), our attorneys have a wealth of experience in antitrust cases that raise novel and complex intellectual property issues. Our knowledge, in combination with Wilson Sonsini’s unparalleled patent litigation experience, has led to numerous client victories. We have represented clients in cases where we defended business practices that raised cutting-edge antitrust concerns, including claims challenging IP licensing practices, standard-setting activities, and patent pools.  

Newsletters
European Antitrust Bimonthly Bulletin - March/April 2026
The firm is pleased to distribute the European Antitrust Bimonthly Bulletin, which breaks down the major antitrust developments in Europe in the past two months into concise and actionable takeaways.
Alerts
Agri Stats Settlement Clarifies DOJ Views on Information Sharing
On May 7, 2026, the U.S. Department of Justice (DOJ) Antitrust Division and six state attorneys general filed a proposed Final Judgment to resolve antitrust claims against benchmarking and consulting firm Agri Stats, Inc. (Agri Stats). Agri Stats collects, processes, and distributes benchmarking data to broiler chicken, pork, and turkey processing operations. The reports are based on non-public pricing, profitability, and cost data submitted by meat processors. While Agri Stats purported to aggregate and anonymize the data, the DOJ alleged that those receiving the reports could identify who submitted the non-public data, allowing participants to raise prices.
Alerts
State Coalition Claims Victory in Live Nation Monopolization Trial
On April 15, 2026, a federal jury found Live Nation liable for monopolization. The case was initially filed by the U.S. Department of Justice (DOJ) and joined by 40 attorneys general (AGs) from the states and the District of Columbia, but the DOJ reached a surprise mid-trial settlement limited to behavioral remedies. A broad coalition of 34 of the AG plaintiffs, from both political parties, rejected the federal settlement as inadequate and continued to litigate the case, culminating in a resounding verdict for the states on all counts tried.
Press Releases
Wilson Sonsini Adds Former DOJ Antitrust Trial Attorney Julia Tarver Wood
Contact:
Kimberly Brooks
212-453-2881
kbrooks@wsgr.com
Client Highlights
Court Denies Plaintiffs Leave to Amend in Replacement Tires Antitrust MDL, Dismissing Alleged Price-Fixing Cases with Prejudice
A Wilson Sonsini team recently obtained a full dismissal with prejudice on behalf of Continental Aktiengesellschaft and Continental Tire the Americas, LLC of alleged price-fixing claims on replacement tires. 
Newsletters
European Antitrust Bimonthly Bulletin – January/February 2026
Wilson Sonsini's European Antitrust Bimonthly Bulletin breaks down the major antitrust developments in Europe in the past two months into concise and actionable takeaways.
View All
Insights
Newsletters
European Antitrust Bimonthly Bulletin - March/April 2026
The firm is pleased to distribute the European Antitrust Bimonthly Bulletin, which breaks down the major antitrust developments in Europe in the past two months into concise and actionable takeaways.
Alerts
Agri Stats Settlement Clarifies DOJ Views on Information Sharing
On May 7, 2026, the U.S. Department of Justice (DOJ) Antitrust Division and six state attorneys general filed a proposed Final Judgment to resolve antitrust claims against benchmarking and consulting firm Agri Stats, Inc. (Agri Stats). Agri Stats collects, processes, and distributes benchmarking data to broiler chicken, pork, and turkey processing operations. The reports are based on non-public pricing, profitability, and cost data submitted by meat processors. While Agri Stats purported to aggregate and anonymize the data, the DOJ alleged that those receiving the reports could identify who submitted the non-public data, allowing participants to raise prices.
Alerts
State Coalition Claims Victory in Live Nation Monopolization Trial
On April 15, 2026, a federal jury found Live Nation liable for monopolization. The case was initially filed by the U.S. Department of Justice (DOJ) and joined by 40 attorneys general (AGs) from the states and the District of Columbia, but the DOJ reached a surprise mid-trial settlement limited to behavioral remedies. A broad coalition of 34 of the AG plaintiffs, from both political parties, rejected the federal settlement as inadequate and continued to litigate the case, culminating in a resounding verdict for the states on all counts tried.
Press Releases
Wilson Sonsini Adds Former DOJ Antitrust Trial Attorney Julia Tarver Wood
Contact:
Kimberly Brooks
212-453-2881
kbrooks@wsgr.com
Client Highlights
Court Denies Plaintiffs Leave to Amend in Replacement Tires Antitrust MDL, Dismissing Alleged Price-Fixing Cases with Prejudice
A Wilson Sonsini team recently obtained a full dismissal with prejudice on behalf of Continental Aktiengesellschaft and Continental Tire the Americas, LLC of alleged price-fixing claims on replacement tires. 
Newsletters
European Antitrust Bimonthly Bulletin – January/February 2026
Wilson Sonsini's European Antitrust Bimonthly Bulletin breaks down the major antitrust developments in Europe in the past two months into concise and actionable takeaways.
View All
Affiliated Programs
Restrictive Covenants and the FTC’s Non-Compete Rule: The Current State of Play and Preparing for the Future for In-House Counsel
Given the prevalence of restrictive covenants in business today and the evolving regulatory framework, understanding the state of the law is pivotal to safeguarding your company’s competitive edge, its most sensitive information, and its investment in innovation.
Speaking Engagements
ABA Webinar - "The Price is Right (or Wrong?): Litigating Pricing Practices in the US and Europe"
On June 18th, the American Bar Association's (ABA) Antitrust Law Section hosts a webinar discussion focused on the antitrust debate around price parity restrictions and algorithmic pricing being played out in litigations and investigations. The panel will discuss recent cases and analyze breaking news in this area. Wilson Sonsini's antitrust and competition associate Allison B. Smith joins the panel of practitioners from Europe and the U.S., to compare theories and trends on these issues. Learn more and register here.
Speaking Engagements
2024 “Why Antitrust?” Series – ABA Antitrust Law Section
Hosted by the University of Michigan Law School, this program is part of the American Bar Association (ABA) Antitrust Law Section’s "Why Antitrust?" series.  The live program will be held at The University of Michigan Law School in the Jeffries Hall 0225. The program is free to attend for all law students and non-members.

About the program: Did you know that both the state and federal governments are active in antitrust? Is there coordination between national policy and local interest? How do companies and lawyers navigate this system? An esteemed panel of experts will share their perspectives on dealing with different levels of government in applying antitrust law, and the engagement and interaction between the relevant authorities. Wilson Sonsini’s Alexandra Keck (Associate, Antitrust and Competition) joins the March 4 panel as a speaker.
Affiliated Programs
Class Certifications in U.S. Antitrust Litigation: Identifying Obstacles and Recognising Trends
Join accomplished antitrust practitioners for a one-hour live masterclass on December 6 hosted by Lexology and GCR. Our panelists include two antitrust litigators from Wilson Sonsini and in-house counsel at Qualcomm. They will be discussing recent developments in the case law and practical considerations for antitrust class certification efforts such as working with expert economists and industry experts, as well as the importance of third-party discovery. 
Events
Affiliated Programs
Restrictive Covenants and the FTC’s Non-Compete Rule: The Current State of Play and Preparing for the Future for In-House Counsel
Given the prevalence of restrictive covenants in business today and the evolving regulatory framework, understanding the state of the law is pivotal to safeguarding your company’s competitive edge, its most sensitive information, and its investment in innovation.
Speaking Engagements
ABA Webinar - "The Price is Right (or Wrong?): Litigating Pricing Practices in the US and Europe"
On June 18th, the American Bar Association's (ABA) Antitrust Law Section hosts a webinar discussion focused on the antitrust debate around price parity restrictions and algorithmic pricing being played out in litigations and investigations. The panel will discuss recent cases and analyze breaking news in this area. Wilson Sonsini's antitrust and competition associate Allison B. Smith joins the panel of practitioners from Europe and the U.S., to compare theories and trends on these issues. Learn more and register here.
Speaking Engagements
2024 “Why Antitrust?” Series – ABA Antitrust Law Section
Hosted by the University of Michigan Law School, this program is part of the American Bar Association (ABA) Antitrust Law Section’s "Why Antitrust?" series.  The live program will be held at The University of Michigan Law School in the Jeffries Hall 0225. The program is free to attend for all law students and non-members.

About the program: Did you know that both the state and federal governments are active in antitrust? Is there coordination between national policy and local interest? How do companies and lawyers navigate this system? An esteemed panel of experts will share their perspectives on dealing with different levels of government in applying antitrust law, and the engagement and interaction between the relevant authorities. Wilson Sonsini’s Alexandra Keck (Associate, Antitrust and Competition) joins the March 4 panel as a speaker.
Affiliated Programs
Class Certifications in U.S. Antitrust Litigation: Identifying Obstacles and Recognising Trends
Join accomplished antitrust practitioners for a one-hour live masterclass on December 6 hosted by Lexology and GCR. Our panelists include two antitrust litigators from Wilson Sonsini and in-house counsel at Qualcomm. They will be discussing recent developments in the case law and practical considerations for antitrust class certification efforts such as working with expert economists and industry experts, as well as the importance of third-party discovery. 
Jeffrey C. Bank
Partner
Washington, D.C.
Jeff represents companies in antitrust disputes, including multi-district litigations and cartel cases.
  • Antitrust and Competition
View Profile
Beau Buffier
Partner
New York
Beau Buffier is an antitrust partner in the New York and Boston offices of Wilson Sonsini Goodrich & Rosati, where his practice focuses on defending clients in merger investigations before the Federal Trade Commission and Department of Justice as well as non-U.S. antitrust agencies including the CMA (UK). Beau also represents domestic and foreign clients in connection with various antitrust issues concerning cartel matters, abuse of dominance, joint ventures, distribution arrangements, intellectual property, competitor collaborations and Hart-Scott-Rodino compliance. Beau has defended substantive merger investigations and other civil and criminal investigations involving a wide variety of industries, including semiconductors, telecommunications, enterprise software, internet platforms, pharmaceuticals, medical devices, chemicals, retailing, airlines, automotive parts, and entertainment and ticketing.
  • Antitrust and Competition
View Profile
Deirdre Carroll
Partner
Brussels
Deirdre Carroll is a partner in the Brussels and London offices of Wilson Sonsini Goodrich & Rosati, where her practice focuses on global mergers, agency investigations, and compliance counselling. She also works closely with Wilson Sonsini’s data protection and privacy team to provide clients with integrated, strategic advice on data-related antitrust counselling and digital platform regulation, including the EU’s Digital Markets Act. 
  • Antitrust and Competition
View Profile
Brendan Coffman
Partner
Washington, D.C.
Brendan Coffman is a partner in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where he is a member of the antitrust and competition practice. Brendan’s practice is rooted in helping innovative companies align competition strategy with broader business goals. 
  • Antitrust and Competition
View Profile
Jamillia P. Ferris
Partner
Washington, D.C.
Jamillia represents clients in several areas, including merger review, government investigations, and antitrust-related counseling and litigation.
  • Antitrust and Competition
View Profile
Michelle Yost Hale
Partner
Washington, D.C.
Michelle Hale focuses on complex, government-facing antitrust matters. Michelle regularly represents companies before the Federal Trade Commission (FTC) and the U.S. Department of Justice in conduct and merger investigations, including specializing in matters involving investigations into potential Robinson-Patman Act violations. This experience informs her ability to provide effective antitrust counseling on a wide range of business conduct, including joint ventures, collaborations, and pricing and distribution, among others. She also has extensive experience navigating through the complexities of the U.S. HSR and multi-jurisdictional filing processes.
  • Antitrust and Competition
View Profile
Jindrich Kloub
Partner
Brussels
Head of Wilson Sonsini’s European antitrust team, Jindrich Kloub represents clients in high-stakes antitrust investigations, cartel defense, and digital markets regulation matters, providing strategic counsel on navigating enforcement processes across jurisdictions in Europe and Hong Kong. He defends companies facing regulatory scrutiny and helps clients secure remedies in complex antitrust disputes. His expertise covers abuse of dominance, cartels, distribution and licensing agreements, competitor collaborations, and sustainability initiatives, including compliance with EU sustainability regulations.
  • Antitrust and Competition
View Profile
Ben Labow
Partner
San Francisco
Ben advises clients on antitrust issues, such as M&A clearance, pricing, and distribution.
  • Antitrust and Competition
View Profile
Bonnie Lau
Partner
San Francisco
Bonnie Lau is a partner in the San Francisco office of Wilson Sonsini Goodrich & Rosati. She represents clients in antitrust and related complex litigation involving claims of price-fixing, wage-fixing, no-poach conduct, output suppression, monopolization, refusal to deal, predatory pricing, and group boycott, as well as antitrust counterclaims in IP and patent matters. Clients praise Bonnie as a “masterful strategist” who “deliver[s] pragmatic and business-focused advice,” and “a fantastic lawyer” who is “detail-oriented and able to manage complex matters with ease and good humor” (Chambers USA).
  • Antitrust and Competition
View Profile
Matthew D. McDonald
Partner
Washington, D.C.
Matt represents companies in antitrust matters, including M&A clearance.
  • Antitrust and Competition
View Profile
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People
Jeffrey C. Bank
Partner
Washington, D.C.
Jeff represents companies in antitrust disputes, including multi-district litigations and cartel cases.
  • Antitrust and Competition
View Profile
Beau Buffier
Partner
New York
Beau Buffier is an antitrust partner in the New York and Boston offices of Wilson Sonsini Goodrich & Rosati, where his practice focuses on defending clients in merger investigations before the Federal Trade Commission and Department of Justice as well as non-U.S. antitrust agencies including the CMA (UK). Beau also represents domestic and foreign clients in connection with various antitrust issues concerning cartel matters, abuse of dominance, joint ventures, distribution arrangements, intellectual property, competitor collaborations and Hart-Scott-Rodino compliance. Beau has defended substantive merger investigations and other civil and criminal investigations involving a wide variety of industries, including semiconductors, telecommunications, enterprise software, internet platforms, pharmaceuticals, medical devices, chemicals, retailing, airlines, automotive parts, and entertainment and ticketing.
  • Antitrust and Competition
View Profile
Deirdre Carroll
Partner
Brussels
Deirdre Carroll is a partner in the Brussels and London offices of Wilson Sonsini Goodrich & Rosati, where her practice focuses on global mergers, agency investigations, and compliance counselling. She also works closely with Wilson Sonsini’s data protection and privacy team to provide clients with integrated, strategic advice on data-related antitrust counselling and digital platform regulation, including the EU’s Digital Markets Act. 
  • Antitrust and Competition
View Profile
Brendan Coffman
Partner
Washington, D.C.
Brendan Coffman is a partner in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where he is a member of the antitrust and competition practice. Brendan’s practice is rooted in helping innovative companies align competition strategy with broader business goals. 
  • Antitrust and Competition
View Profile
Jamillia P. Ferris
Partner
Washington, D.C.
Jamillia represents clients in several areas, including merger review, government investigations, and antitrust-related counseling and litigation.
  • Antitrust and Competition
View Profile
Michelle Yost Hale
Partner
Washington, D.C.
Michelle Hale focuses on complex, government-facing antitrust matters. Michelle regularly represents companies before the Federal Trade Commission (FTC) and the U.S. Department of Justice in conduct and merger investigations, including specializing in matters involving investigations into potential Robinson-Patman Act violations. This experience informs her ability to provide effective antitrust counseling on a wide range of business conduct, including joint ventures, collaborations, and pricing and distribution, among others. She also has extensive experience navigating through the complexities of the U.S. HSR and multi-jurisdictional filing processes.
  • Antitrust and Competition
View Profile
Jindrich Kloub
Partner
Brussels
Head of Wilson Sonsini’s European antitrust team, Jindrich Kloub represents clients in high-stakes antitrust investigations, cartel defense, and digital markets regulation matters, providing strategic counsel on navigating enforcement processes across jurisdictions in Europe and Hong Kong. He defends companies facing regulatory scrutiny and helps clients secure remedies in complex antitrust disputes. His expertise covers abuse of dominance, cartels, distribution and licensing agreements, competitor collaborations, and sustainability initiatives, including compliance with EU sustainability regulations.
  • Antitrust and Competition
View Profile
Ben Labow
Partner
San Francisco
Ben advises clients on antitrust issues, such as M&A clearance, pricing, and distribution.
  • Antitrust and Competition
View Profile
Bonnie Lau
Partner
San Francisco
Bonnie Lau is a partner in the San Francisco office of Wilson Sonsini Goodrich & Rosati. She represents clients in antitrust and related complex litigation involving claims of price-fixing, wage-fixing, no-poach conduct, output suppression, monopolization, refusal to deal, predatory pricing, and group boycott, as well as antitrust counterclaims in IP and patent matters. Clients praise Bonnie as a “masterful strategist” who “deliver[s] pragmatic and business-focused advice,” and “a fantastic lawyer” who is “detail-oriented and able to manage complex matters with ease and good humor” (Chambers USA).
  • Antitrust and Competition
View Profile
Matthew D. McDonald
Partner
Washington, D.C.
Matt represents companies in antitrust matters, including M&A clearance.
  • Antitrust and Competition
View Profile
View All

Representative Matters

  • Representing Mylan in high-stakes civil litigations as both a plaintiff and a defendant, including in In re Generics, one of the largest alleged conspiracy cases ever, where our firm serves as one of four liaison counsel for over 50 defendants in the matter. In re Generic Pharmaceuticals Pricing Antitrust Litig. (E.D. Pa.) In another action, Wilson Sonsini successfully represented Mylan as a plaintiff against Celgene in a monopolization case that was resolved when Celgene agreed to pay Mylan $62 million in settlement. Mylan Pharmaceuticals, Inc. v. Celgene Corporation (D.N.J.) Wilson Sonsini is also currently representing Mylan in two plaintiff-side monopolization matters against competitors, in which Mylan was delayed or foreclosed from competing. Mylan Pharmaceuticals, Inc. v. Teva Pharmaceuticals Industries Ltd. et al (D.N.J.) / Mylan Pharmaceuticals, Inc. et al v. Sanofi-Aventis U.S. LLC et al (W.D. Pa.)
  • Representing Morgan Properties Management Company, LLC in an ongoing multidistrict class action brought by private plaintiffs and a related action brought by a State Attorney General alleging the defendants engaged in a conspiracy to fix and inflate multifamily rental housing prices through the common use of third-party algorithmic pricing software. In re RealPage, Inc., Rental Software Antitrust Litigation (No. II) (M.D. Tenn.); State of Maryland v. RealPage, Inc. et al (Md. Circuit Court)
  • Representing Seagate Technology as a plaintiff against certain Japanese manufacturers accused of price-fixing on suspension assemblies used in hard disk drives. Seagate Technology, LLC et al v. NHK Spring Co., Ltd. et al. (N.D. Cal.)
  • Defending the former CEO of healthcare company in alleged no-poach case brought by putative class of employees. In re Outpatient Medical Center Employee Antitrust Litigation (N.D. Ill.)
  • Represented Google in a lawsuit filed by the DOJ and several state attorneys general alleging unlawful monopoly maintenance in connection with the search and search advertising markets. United States of America et al v. Google Inc. (D.D.C.)
  • Secured the dismissal of antitrust claims against Continental Tire in a multidistrict price-fixing litigation brought by three putative classes of plaintiffs who alleged that Continental conspired with other major tire manufacturers to artificially inflate the price of new replacement vehicle tires in the United States. In re Passenger Vehicle Replacement Tires Antitrust Litigation (N.D. Ohio)
  • Secured the dismissal of claims against Google inlitigations filed by KinderStart, Person, TradeComet, and MyTriggers. In each case the plaintiffs challenged Google's Search rankings and AdWords quality score adjustments as acts of monopolization. TradeComet.Com LLC v. Google, Inc. (S.D.N.Y.)
  • Secured the dismissal of claims against Google in an antitrust and contract litigation filed by Dreamstime, a stock photo website. Dreamstime alleged that Google reduced its rankings and entered into promotional deals with other stock photo websites, including Getty and Shutterstock, which favored those sites. The U.S. Court of Appeals for the Ninth Circuit affirmed that the district court properly dismissed the Section 2 claims. Dreamstime.com, LLC, LLC V. Google LLC (N.D. Cal.) / Dreamstime.com, LLC v. Google LLC 20-16472 (9th Circ.)
  • Secured a favorable outcome for pharmaceutical company Amphastar in related antitrust and patent cases that were resolved in a global settlement after a successful First Circuit appeal. In June 2019, Amphastar announced that it has entered into a settlement agreement with Momenta/Sandoz, under which Momenta and Sandoz agreed to pay Amphastar $59.9 million. Amphastar Pharmaceuticals, Inc., et al v. Momenta Pharmaceuticals, Inc., et al (D. Mass; 1st Cir.)
  • Secured the dismissal of antitrust claims against Symantec in an antitrust litigation filed by plaintiff NSS Labs, a cybersecurity testing vendor. NSS Labs alleged refusal to deal claims against Symantec and Crowdstrike, manufacturers of cybersecurity platform products known as endpoint protection products, other testing vendors, and the Anti-Malware Testing Standards Organization. NSS Labs, Inc. v. CrowdStrike, Inc., et al. (N.D. Cal.)
  • Secured the dismissal of antitrust counterclaims against Twin America LLC and its affiliates, Gray Line New York Tours, Inc., and Sightseeing Pass LLC, in a New York state law antitrust and tortious interference case. The claims alleged a conspiracy between Gray Line and rival tour bus and ticketing companies to pressure tourist attractions into not partnering with Go New York on package ticket deals. Wilson Sonsini's motion to dismiss was granted and later appealed. The firm briefed and argued the appeal, resulting in the Appellate Division, First Department, affirming the dismissal. Go New York Tours, Inc. v. Gray Line New York Tours, Inc. et al (S.D.N.Y.) / Go New York Tours, Inc. v. Gray Line New York Tours, Inc. 20-1022 (2d Cir.)
  • Secured a favorable outcome for Hebei Welcome Pharmaceutical and North China Pharmaceutical Group (NCPG) in a closely watched case concerning vitamin C exported from China. Wilson Sonsini successfully persuaded the U.S. Court of Appeals for the Second Circuit to overturn a $150 million judgment against Habei and NCPG. When the U.S. Supreme Court later granted cert to hear the appeal, Wilson Sonsini filed the respondents’ brief and argued before the Court. The case was then remanded to the Second Circuit, which again handed our client a win. The plaintiffs again sought review in the Supreme Court, but their petition was denied without dissent on October 3, 2022, bringing the case to a final end. In re Vitamin C Antitrust Litigation (E.D.N.Y)
  • Secured a favorable outcome for Hitachi and two subsidiaries in follow-on litigation relating to global price-fixing investigations by the DOJ and other foreign agencies. Wilson Sonsini coordinated with counsel around the world, and successfully guided Hitachi through complex strategic decisions raised by the parallel nature of the ongoing criminal investigations and civil litigation. Ultimately, after years of litigation, and a key win on an FTAIA issue, we were able to negotiate favorable settlements with the class plaintiffs and numerous opt-out plaintiffs. In re Capacitors Antitrust Litig. (N.D. Cal.)
  • Secured a favorable outcome for Walgreens in a consolidated class action litigation regarding 1-800 CONTACTS’s allegedly unlawful search advertising bidding agreements. The plaintiffs alleged that some of those agreements between Walgreens (and its former subsidiary Vision Direct) and 1-800 CONTACTS, entered into in order to settle trademark litigation, unlawfully caused the prices of contact lenses sold online to increase. Wilson Sonsini negotiated a favorable settlement, resolving all actions against Walgreens. Thompson et al v. 1-800 Contacts, Inc. et al (D. Utah)
  • Secured a favorable outcome for Transitions in a long-running litigation in which class action plaintiffs and a competitor-plaintiff alleged that Transitions engaged in unlawful exclusive dealing and a refusal to deal. Wilson Sonsini successfully represented Transitions in defeating class certification in the multidistrict litigation. The competitor-plaintiff Vision-Ease’s refusal to deal claims were dismissed on summary judgment, and the parties settled the remaining claims on the eve of trial. In re Photochromic Lens Antitrust Litigation (D. Del.)
  • Secured the dismissal of claims against Netflix in a major victory in the U.S. Court of Appeals for the Ninth Circuit, which affirmed the dismissal of all claims by a class of subscribers that accused Netflix of conspiring with Walmart to illegally allocate and monopolize the online DVD rental market. Wilson Sonsini also successfully obtained a dismissal of claims by Blockbuster subscribers that they were allegedly harmed by indirect effects of the same conduct. In re Online DVD Rental Antitrust Litigation (N.D. Cal.)
  • Secured the dismissal of antitrust claims brought against Live Nation by a rival concert promoter and venue operator It’s My Party. The plaintiff claimed that Live Nation had engaged in anticompetitive tying of promotion and venue services in order to monopolize the market for concert promotion. After the lower court granted Live Nation’s motion for summary judgment, Wilson Sonsini also fended off the plaintiff’s appeal to the U.S. Court of Appeals for the Fourth Circuit. It's My Party, Inc. et al v. Live Nation, Inc. (D. Md.)
  • Secured the dismissal of claims against Live Nation in a case brought by classes of concertgoers alleging that the company had monopolized a market for live rock concerts. Wilson Sonsini defeated class certification, and the district court’s ruling was affirmed by the U.S. Court of Appeals for the Second Circuit. Wilson Sonsini then secured dismissal of claims brought by concertgoers from two cities, resulting in all plaintiffs dismissing their claims. Live Concert Antitrust Litigation (C.D. Cal.)
Representative Matters

Representative Matters

  • Representing Mylan in high-stakes civil litigations as both a plaintiff and a defendant, including in In re Generics, one of the largest alleged conspiracy cases ever, where our firm serves as one of four liaison counsel for over 50 defendants in the matter. In re Generic Pharmaceuticals Pricing Antitrust Litig. (E.D. Pa.) In another action, Wilson Sonsini successfully represented Mylan as a plaintiff against Celgene in a monopolization case that was resolved when Celgene agreed to pay Mylan $62 million in settlement. Mylan Pharmaceuticals, Inc. v. Celgene Corporation (D.N.J.) Wilson Sonsini is also currently representing Mylan in two plaintiff-side monopolization matters against competitors, in which Mylan was delayed or foreclosed from competing. Mylan Pharmaceuticals, Inc. v. Teva Pharmaceuticals Industries Ltd. et al (D.N.J.) / Mylan Pharmaceuticals, Inc. et al v. Sanofi-Aventis U.S. LLC et al (W.D. Pa.)
  • Representing Morgan Properties Management Company, LLC in an ongoing multidistrict class action brought by private plaintiffs and a related action brought by a State Attorney General alleging the defendants engaged in a conspiracy to fix and inflate multifamily rental housing prices through the common use of third-party algorithmic pricing software. In re RealPage, Inc., Rental Software Antitrust Litigation (No. II) (M.D. Tenn.); State of Maryland v. RealPage, Inc. et al (Md. Circuit Court)
  • Representing Seagate Technology as a plaintiff against certain Japanese manufacturers accused of price-fixing on suspension assemblies used in hard disk drives. Seagate Technology, LLC et al v. NHK Spring Co., Ltd. et al. (N.D. Cal.)
  • Defending the former CEO of healthcare company in alleged no-poach case brought by putative class of employees. In re Outpatient Medical Center Employee Antitrust Litigation (N.D. Ill.)
  • Represented Google in a lawsuit filed by the DOJ and several state attorneys general alleging unlawful monopoly maintenance in connection with the search and search advertising markets. United States of America et al v. Google Inc. (D.D.C.)
  • Secured the dismissal of antitrust claims against Continental Tire in a multidistrict price-fixing litigation brought by three putative classes of plaintiffs who alleged that Continental conspired with other major tire manufacturers to artificially inflate the price of new replacement vehicle tires in the United States. In re Passenger Vehicle Replacement Tires Antitrust Litigation (N.D. Ohio)
  • Secured the dismissal of claims against Google inlitigations filed by KinderStart, Person, TradeComet, and MyTriggers. In each case the plaintiffs challenged Google's Search rankings and AdWords quality score adjustments as acts of monopolization. TradeComet.Com LLC v. Google, Inc. (S.D.N.Y.)
  • Secured the dismissal of claims against Google in an antitrust and contract litigation filed by Dreamstime, a stock photo website. Dreamstime alleged that Google reduced its rankings and entered into promotional deals with other stock photo websites, including Getty and Shutterstock, which favored those sites. The U.S. Court of Appeals for the Ninth Circuit affirmed that the district court properly dismissed the Section 2 claims. Dreamstime.com, LLC, LLC V. Google LLC (N.D. Cal.) / Dreamstime.com, LLC v. Google LLC 20-16472 (9th Circ.)
  • Secured a favorable outcome for pharmaceutical company Amphastar in related antitrust and patent cases that were resolved in a global settlement after a successful First Circuit appeal. In June 2019, Amphastar announced that it has entered into a settlement agreement with Momenta/Sandoz, under which Momenta and Sandoz agreed to pay Amphastar $59.9 million. Amphastar Pharmaceuticals, Inc., et al v. Momenta Pharmaceuticals, Inc., et al (D. Mass; 1st Cir.)
  • Secured the dismissal of antitrust claims against Symantec in an antitrust litigation filed by plaintiff NSS Labs, a cybersecurity testing vendor. NSS Labs alleged refusal to deal claims against Symantec and Crowdstrike, manufacturers of cybersecurity platform products known as endpoint protection products, other testing vendors, and the Anti-Malware Testing Standards Organization. NSS Labs, Inc. v. CrowdStrike, Inc., et al. (N.D. Cal.)
  • Secured the dismissal of antitrust counterclaims against Twin America LLC and its affiliates, Gray Line New York Tours, Inc., and Sightseeing Pass LLC, in a New York state law antitrust and tortious interference case. The claims alleged a conspiracy between Gray Line and rival tour bus and ticketing companies to pressure tourist attractions into not partnering with Go New York on package ticket deals. Wilson Sonsini's motion to dismiss was granted and later appealed. The firm briefed and argued the appeal, resulting in the Appellate Division, First Department, affirming the dismissal. Go New York Tours, Inc. v. Gray Line New York Tours, Inc. et al (S.D.N.Y.) / Go New York Tours, Inc. v. Gray Line New York Tours, Inc. 20-1022 (2d Cir.)
  • Secured a favorable outcome for Hebei Welcome Pharmaceutical and North China Pharmaceutical Group (NCPG) in a closely watched case concerning vitamin C exported from China. Wilson Sonsini successfully persuaded the U.S. Court of Appeals for the Second Circuit to overturn a $150 million judgment against Habei and NCPG. When the U.S. Supreme Court later granted cert to hear the appeal, Wilson Sonsini filed the respondents’ brief and argued before the Court. The case was then remanded to the Second Circuit, which again handed our client a win. The plaintiffs again sought review in the Supreme Court, but their petition was denied without dissent on October 3, 2022, bringing the case to a final end. In re Vitamin C Antitrust Litigation (E.D.N.Y)
  • Secured a favorable outcome for Hitachi and two subsidiaries in follow-on litigation relating to global price-fixing investigations by the DOJ and other foreign agencies. Wilson Sonsini coordinated with counsel around the world, and successfully guided Hitachi through complex strategic decisions raised by the parallel nature of the ongoing criminal investigations and civil litigation. Ultimately, after years of litigation, and a key win on an FTAIA issue, we were able to negotiate favorable settlements with the class plaintiffs and numerous opt-out plaintiffs. In re Capacitors Antitrust Litig. (N.D. Cal.)
  • Secured a favorable outcome for Walgreens in a consolidated class action litigation regarding 1-800 CONTACTS’s allegedly unlawful search advertising bidding agreements. The plaintiffs alleged that some of those agreements between Walgreens (and its former subsidiary Vision Direct) and 1-800 CONTACTS, entered into in order to settle trademark litigation, unlawfully caused the prices of contact lenses sold online to increase. Wilson Sonsini negotiated a favorable settlement, resolving all actions against Walgreens. Thompson et al v. 1-800 Contacts, Inc. et al (D. Utah)
  • Secured a favorable outcome for Transitions in a long-running litigation in which class action plaintiffs and a competitor-plaintiff alleged that Transitions engaged in unlawful exclusive dealing and a refusal to deal. Wilson Sonsini successfully represented Transitions in defeating class certification in the multidistrict litigation. The competitor-plaintiff Vision-Ease’s refusal to deal claims were dismissed on summary judgment, and the parties settled the remaining claims on the eve of trial. In re Photochromic Lens Antitrust Litigation (D. Del.)
  • Secured the dismissal of claims against Netflix in a major victory in the U.S. Court of Appeals for the Ninth Circuit, which affirmed the dismissal of all claims by a class of subscribers that accused Netflix of conspiring with Walmart to illegally allocate and monopolize the online DVD rental market. Wilson Sonsini also successfully obtained a dismissal of claims by Blockbuster subscribers that they were allegedly harmed by indirect effects of the same conduct. In re Online DVD Rental Antitrust Litigation (N.D. Cal.)
  • Secured the dismissal of antitrust claims brought against Live Nation by a rival concert promoter and venue operator It’s My Party. The plaintiff claimed that Live Nation had engaged in anticompetitive tying of promotion and venue services in order to monopolize the market for concert promotion. After the lower court granted Live Nation’s motion for summary judgment, Wilson Sonsini also fended off the plaintiff’s appeal to the U.S. Court of Appeals for the Fourth Circuit. It's My Party, Inc. et al v. Live Nation, Inc. (D. Md.)
  • Secured the dismissal of claims against Live Nation in a case brought by classes of concertgoers alleging that the company had monopolized a market for live rock concerts. Wilson Sonsini defeated class certification, and the district court’s ruling was affirmed by the U.S. Court of Appeals for the Second Circuit. Wilson Sonsini then secured dismissal of claims brought by concertgoers from two cities, resulting in all plaintiffs dismissing their claims. Live Concert Antitrust Litigation (C.D. Cal.)
Related Practices
  • Antitrust and Competition
  • Class Action Litigation
  • Patent Litigation
Recent Insights
Newsletters
European Antitrust Bimonthly Bulletin - March/April 2026
The firm is pleased to distribute the European Antitrust Bimonthly Bulletin, which breaks down the major antitrust developments in Europe in the past two months into concise and actionable takeaways.
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Alerts
Agri Stats Settlement Clarifies DOJ Views on Information Sharing
On May 7, 2026, the U.S. Department of Justice (DOJ) Antitrust Division and six state attorneys general filed a proposed Final Judgment to resolve antitrust claims against benchmarking and consulting firm Agri Stats, Inc. (Agri Stats). Agri Stats collects, processes, and distributes benchmarking data to broiler chicken, pork, and turkey processing operations. The reports are based on non-public pricing, profitability, and cost data submitted by meat processors. While Agri Stats purported to aggregate and anonymize the data, the DOJ alleged that those receiving the reports could identify who submitted the non-public data, allowing participants to raise prices.
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Recent Events
Affiliated Programs
Restrictive Covenants and the FTC’s Non-Compete Rule: The Current State of Play and Preparing for the Future for In-House Counsel
Given the prevalence of restrictive covenants in business today and the evolving regulatory framework, understanding the state of the law is pivotal to safeguarding your company’s competitive edge, its most sensitive information, and its investment in innovation.
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Speaking Engagements
ABA Webinar - "The Price is Right (or Wrong?): Litigating Pricing Practices in the US and Europe"
On June 18th, the American Bar Association's (ABA) Antitrust Law Section hosts a webinar discussion focused on the antitrust debate around price parity restrictions and algorithmic pricing being played out in litigations and investigations. The panel will discuss recent cases and analyze breaking news in this area. Wilson Sonsini's antitrust and competition associate Allison B. Smith joins the panel of practitioners from Europe and the U.S., to compare theories and trends on these issues. Learn more and register here.
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Newsletters

2023 Antitrust Year in Review

Wilson Sonsini Goodrich & Rosati is pleased to present its 2023 Antitrust Year in Review, which provides an overview of the significant developments in antitrust law, policy, and enforcement over the past year. This report highlights the most critical global developments in antitrust law, policy, enforcement, and litigation over the past year, with an emphasis on those that will have a lasting impact in the years ahead.

Over the past several years, antitrust issues have come to the fore in public discourse, and that focus has been reflected in significant changes in antitrust law and policy and in more wide-ranging and aggressive enforcement activity. This year’s report provides updates in mergers and acquisitions, civil non-merger enforcement, private litigation, and cartels and criminal enforcement.

Read the 2023 Antitrust Year in Review
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