Rising Stars

Firms To Watch: Civil litigation/class actions: defense

Trial litigation boutique Wilkinson Stekloff, founded by Beth Wilkinson and Brian Stekloff, has experience in defending clients in high-profile and bet-the-company litigation and has recently strengthened its offering with the arrivals of Keri Arnold, who was previously at Arnold & Porter, in October 2022 and former federal prosecutor Grace Hill, who joined in March 2022.

Civil litigation/class actions: defense in United States

Cleary Gottlieb Steen & Hamilton

Cleary Gottlieb Steen & Hamilton is known for regularly representing many household names in the telecommunication, consumer products and healthcare sectors including Google, Coca Cola and Sony Music. The team consists of several former senior officials of the FTC and DOJ who ‘have deep experience in all areas of antitrust’. The ‘brilliant, incredibly hard working and tenacious’ Jeremy Calsyn and monopolization and conspiracy litigation expert Leah Brannon head up the team in Washington DC. Also in DC is ‘rising star’ and ‘all-round incredible lawyer’ Kenneth Reinker. San Francisco based George Cary is another key lawyer, a ‘great strategist and economic mind’, and manages a diverse range of litigation matters. Daniel Culley’s practice in DC includes counseling, merger control and antitrust litigation and investigations particularly concerning high-tech industries and two-sided markets. California based first-chair trial attorney, Heather Nyong’o offers significant experience in antitrust and cross-border litigation. David Gelfand in DC is active in merger challenges and class actions alleging price fixing, for clients across a wide range of industries including oil and gas, pharmaceuticals, retailing, transportation and media.

Practice head(s):

Leah Brannon; Jeremy Calsyn

Other key lawyers:

Kenneth Reinker; George Cary; Daniel Culley; Heather Nyong’o; David Gelfand; Brian Byrne; Bruce Hoffman


‘Jeremy Calsyn is exceptionally good.’

‘Jeremy Calsyn is brilliant, incredibly hard working and tenacious. He is creative and has great relationships and credibility at DOJ and FTC.  Would trust him with any deal (or any antitrust matter).’

‘Kenneth Reinker is a rising star, has outstanding depth on economics, and a great presence and style in presenting to clients, agencies, courts.  He is an all-around incredible lawyer.’

Key clients

T-Mobile USA

Varsity Brands

Fox Corporation

Bank of America

Change Healthcare Holdings, LLC

Juul Labs Inc.

Keurig Dr Pepper Inc.


Walgreens BootsAlliance, Inc.

Leroy Seafood

Work highlights

  • Successfully defended Walgreens Boots Alliance in a class action antitrust litigation in the generic pharmaceuticals antitrust litigation.

Cravath, Swaine & Moore LLP

Cravath, Swaine & Moore LLP has a full service global antitrust offering, with extensive experience acting as defense counsel in bet-the-company and multijurisdictional litigation concerning consumer class action and single plaintiff suits, as well as government enforcement actions. ‘World-class strategist’ Christine Varney chairs the antitrust practice. Gary Bornstein focuses on commercial disputes primarily antitrust, M&A and securities litigation with recent work involving allegations of anticompetitive behavior in the distribution of mobile apps and the modem chipsets business. Kevin Orsini has significant trial and lead counsel experience in class actions. Evan Chesler is recognized for his appearance in numerous cases in the federal and state courts across the country, representing clients in government and internal investigations related to the technology, pharmaceuticals, manufacturing and financial services sectors. Peter Barbur handles large and significant cases, including the successful dismissal for American Express of a civil lawsuit alleging provisions in its merchant agreements violated antitrust laws. All the above-mentioned counsel are based in New York. Former FTC Commissioner, Noah Joshua Phillips, joined the firm’s Washington DC office in October 2022. Katherine Forrest departed from the firm in January 2023.

Practice head(s):

Christine Varney; Gary Bornstein; Kevin Orsini

Other key lawyers:

Evan Chesler; Peter Barbur; Noah Joshua Phillips


‘The caliber of the practice is what you would expect from a top tier firm – highly skilled.’

‘They are responsive and transparent. They tell the full story, including the bad news.’

Key clients

Alcon Laboratories, Inc.

Blue Cross Blue Shield Association

Epic Games, Inc.

Illumina, Inc.

Light & Wonder, Inc.

Louis Dreyfus Company, LLC

Meta Platforms, Inc.

Morgan Stanley

Qualcomm Incorporated

Robinhood Markets, Inc.

Work highlights

  • Representing Meta in a putative class action and individual antitrust litigation filed throughout the country related to the multi-billion-dollar digital advertising industry.

Gibson, Dunn & Crutcher LLP

The team at Gibson, Dunn & Crutcher LLP offers a full-service antitrust practice and excels in bet-the-company defense civil litigation and class actions on behalf of market leading clients , particularly in the media, entertainment and high-tech sectors, such as McDonalds and Apple. The practice is jointly headed up by California based and highly respected Rachel Brass, who has extensive experience litigating in antitrust, labor and employment matters with recent work involving allegations of no poach agreements and monopolization; and Washington DC’s Stephen Weissman, former deputy director of the FTC’s bureau of competition, who counsels clients in antitrust investigations and acts as lead counsel in bench and jury trials concerning claims under the Sherman Act and Clayton Act. Also located in DC is the experienced trial and regulatory lawyer Rich Parker, who has a broad antitrust practice involving cartel matters, class actions and government investigations, Cynthia Richman who defends clients in cartel, tying and price-fixing litigation before state and federal courts, and Scott Hammond, an expert in price-fixing and cartel matters, as well as cross border investigations. In Los Angeles, Daniel Swanson handles antitrust and commercial litigation disputes while New York-based Eric Stock focuses on antitrust litigation and investigations particularly in the pharma, financial services, technology and healthcare space.

Practice head(s):

Rachel Brass; Stephen Weissman

Other key lawyers:

Rich Parker; Cynthia Richman; Scott Hammond; Daniel Swanson; Eric Stock

Key clients

LIV Golf



Merck & Co., Inc.

Jimmy John’s

Kraft and Mondelez

Smithfield Foods

Novartis AG


Panasonic Corporation and Panasonic Corporation of North America

Jones Day

The antitrust powerhouse at Jones Day has a longstanding reputation for defending domestic and international clients in complex antitrust investigations, class actions and civil litigation. The team offers experience across key industries including healthcare and technology, as well as manufacturing. Craig Waldman in Washington DC co-chairs the firm’s global antitrust and competition law practice, representing clients in several industries in areas such as competitor agreements, vertical distribution issues and price discrimination. DC based John Majoras is considered a go-to litigator, frequently advising clients in the defense of multi-district class action litigation following international cartel investigations. Julie McEvoy, also in DC, has extensive experience in high-profile civil antitrust matters and has recently defended in multiple class actions concerning clients such as Cargill Meat Solutions and Sanofi-Aventis. San Francisco’s David Kiernan, is highly adept with econometrics, antitrust and class action litigation in industries including high-tech, healthcare and energy. Michelle Fischer, situated in Cleveland, has a diverse antitrust practice, litigating in class actions and individual claims covering conspiracies, sham petitioning, bundling, distribution and monopolization.

Practice head(s):

Craig Waldman

Other key lawyers:

John Majoras; Julie McEvoy; David Kiernan; Michelle Fischer

Key clients

American Bankers Association

Axon Enterprise, Inc.

Cardinal Health, Inc.

Cargill Meat Solutions, Inc.

Cleveland-Cliffs Inc.

Google, Inc.

Indivior, Inc.

Magellan Midstream Partners

Marathon Petroleum

National Beef Packing Company, LLC.


Sanofi-Aventis U.S. LLC

Sutter Health

Union Pacific Railway Co.

Wells Fargo, National Association

Work highlights

  • Represented Sutter Health in securing a complete defense verdict in a landmark class action seeking over USD 1.2 billion in treble damages as well as injunctive relief.
  • Represented Marathon Petroleum in winning summary judgment in two consolidated antitrust class actions that sought a combined USD 72 billion in treble damages.
  • Represented Sanofi-Aventis U.S. LLC and Sanofi-Aventis Puerto Rico, Inc. against a putative class action brought on behalf of wholesalers that purchased of Lantus, the company’s blockbuster long-acting insulin glargine product.

Kirkland & Ellis LLP

Kirkland & Ellis LLP regularly defends pharmaceutical companies in antitrust and competition disputes involving a full spectrum of antitrust claims including pay-for-delay actions, pricing disputes, monopolization, and intellectual property. The team has experience in government-initiated investigations and private antitrust matters against the DOJ, the FTC, state attorney generals, competitors as well as purchaser and consumer classes. Chicago-based Daniel Laytin handles commercial, antitrust and class action litigation with recent matters raising questions of wage fixing and monopolization. Also situated in Chicago, James Mutchnik focuses on disputes surrounding domestic and international cartels and price discrimination claims while Christa Cottrell is involved in complex commercial litigation involving large companies including Blue Cross Blue Shield Association and AbbVie. Olivia Adendorff in Washington DC and Dallas is well-versed in complex commercial class actions. The firm has expanded the team with several hires from the DOJ including Scott Scheele and Elyse Dorsey in Washington DC and Molly Kelley in the firm’s Chicago office. Katherine Rocco departed from the firm in April 2022 and Sean Royall left in February 2022.

Other key lawyers:

Daniel Laytin; James Mutchnik; Christa Cottrell; Olivia Adendorff; Scott Scheele; Elyse Dorsey; Molly Kelley


Kirkland litigators are second-to-none in their legal analysis & strategy, attention to client needs, and ability to win.


Key clients



Blue Cross & Blue Shield Association

Impax Laboratories


Sanderson Farms

Sun Pharmaceuticals

Teva Pharmaceuticals

The Clemens Family Corporation

UnitedHealth Group

Latham & Watkins LLP

The ‘incredibly creative and hard-working’ team at Latham & Watkins LLP excels in securing early dismissals, settlement and wins at trial concerning claims alleging anticompetitive collusion, monopolization, distribution, and pricing policies in the US and globally. In Washington DC, global chair of the practice Amanda Reeves’ work spans litigation and merger control in a range of industries including high technology, life sciences and consumer products among others. San Francisco-based Belinda Lee, global vice-chair of the practice, has extensive experience in defending global companies across the technology, manufacturing and transportation sectors in consumer class actions, unfair competition, and licensing disputes. The ‘well-prepared, consistent, detailed, and energetic’ Christopher Yates offers significant trial experience involving high profile clients, evidenced in the significant trial victory for Oracle against Hewlett Packard Enterprises in a dispute alleging unfair competition. In DC, Jennifer Giordano has expertise in defending clients in cases at both the trial and appellate level including multidistrict litigation, class actions and business-to-business litigation. Trial lawyer Al Pfeiffer leads on many matters and is noted for his experience in representing Fortune 500 companies and handling antitrust claims concerning dominant firm conduct. Aaron Chiu, who is based in the firm’s San Francisco hub, was promoted to partner in January 2022. The team has grown its capacity with the recent hires in April 2022 of former assistant Attorney General Makan Delrahim in DC and Katherine Rocco, formerly at Kirkland & Ellis LLP, who joined the firm’s New York office. Daniel Wall is no longer at the firm.

Practice head(s):

Amanda Reeves; Belinda Lee

Other key lawyers:

Christopher Yates; Jennifer Giordano; Al Pfeiffer; Lawrence Buterman; Marguerite Sullivan; Aaron Chiu; Makan Delrahim; Katherine Rocco; Britton Davis


‘Jennifer Giordano instills confidence providing strategic insight, practicality and discernible care for the client. You know a good lawyer when you see one and she is the real deal.’

‘The team is incredibly creative and hard-working. They apply their intelligence to complex legal problems and come up with solutions which others cannot do.’

‘Aaron Chiu offers superb intellect, legal analysis, and people skills.’ 

‘The key differentiating component is simply experience. When choosing representation, particularly in complex antitrust matters, experience is critically important. The stakes are high and the issues are complicated. The team’s experience enabled expert testimony has substantially assisted our efforts as well as their ability to identify and utilize the most suitable and respected experts.’ 

‘A few individuals stand out. Christopher Yates has been front and center for depositions, oral arguments, and direct communication with the judge. He is well-prepared, consistent, detailed, and energetic. Aaron Chiu is the partner who has mostly provided direct counseling on strategy. He has an incredible recall of case materials, depositions, and legal briefs. His research work has been exceptional, providing us with case references that reflect a depth of understanding of our case, and consistently anticipating our best next moves.’

‘This team has a true winning spirit which involves them researching and finding every legal angle that can help its clients. They have a truly deep bench of former government attorneys and regularly bring to the table the attorney best suited to answer any question.’

‘If Latham is a fighter jet, Lawrence Buterman is the skilled pilot, with an ability to shoot down any opposing argument seemingly with ease. He is an expert in antitrust law and also has the ability to tell the client’s story in court in an easy-to-understand manner, regardless of how complex the case may be.’

‘Very good communication with clients, provide multi-national support and strategic and practical advice to provide solutions.’

Key clients


Fanatics, LLC

Dairy Farmers of America, Inc.

StarKist Co.

United States Soccer Federation, Inc.

Harbor Distributing, LLC

Radio Music License Committee Inc.


Surescripts, LLC

Cox Enterprises, Inc.

Ocean Spray Cranberries, Inc.

Olam International


CCC Intelligent Solutions Inc.


Work highlights

  • Representing Oracle in a long-running unfair competition suit against Hewlett Packard Enterprise Company in the US District Court for the Northern District of California.
  • Representing sportswear retailer Fanatics in a pair of purported class actions filed by distributors and consumers of NFL licensed products and, in a separate case, filed by an online retailer of Major League Baseball licensed products, regarding allegations of violating sections 1 and 2 of the Sherman Act.
  • Advised Dairy Farmers of America in a putative class action accusing the company and other co-operatives of fixing the prices paid to their respective member-owners in the Southwest United States.

Morgan, Lewis & Bockius LLP

Morgan, Lewis & Bockius LLP has strong expertise in handling antitrust matters particularly across the tech, financial services, and healthcare sectors, defending key clients such as Fanatics and Google LLC. Recent work has involved class actions resulting from monopolization claims and no-poach agreements. Philadelphia-based global practice leader Steven Reed acts in high-stake matters across trial and appellate levels, offering previous experience as in-house lawyer at a large pharmaceutical company. Co-deputy practice leader Ryan Kantor is based in Washington DC. ‘National leader in the antitrust and competition arena’ and co-deputy practice leader Brendan Fee in Philadelphia, specializes in high-stakes antitrust class litigation for clients in a variety of industries including life sciences and energy. Brian Rocca leads the firm’s California antitrust practice with expertise in defending against monopolization claims in the technology sector. DC based Jon Roellke leads in many matters, focusing particularly on antitrust and trade regulation matters including class action and enforcement matters concerning financial services and technology clients. Noah Kaufman, promoted to partner in Boston in October 2022, represents clients across the higher education, automotive and retail sectors. Clayton Everett Jr and Stacey Anne Mahoney in DC and New York respectively, are also noted by peers and offer extensive counseling and litigation experience. Willard Tom retired in October 2022.

Practice head(s):

Steven Reed; Ryan Kantor; Brendan Fee

Other key lawyers:

Jon Roellke; Brian Rocca; Noah Kaufman; Clayton Everett Jr; Stacey Anne Mahoney


‘Develops a truly deep understanding of your business as part of the engagement to understand motivations relevant to the matters being handled.’

‘Patient, knowledgeable and well-connected in the industry.’

‘Provides outstanding tactical advice across all sectors, excellent judgment, and an outstanding defense for its clients.’

‘Brendan Fee is a national leader in the antitrust/competition arena. He serves as a walking encyclopedia of antitrust legal knowledge, deploys supreme judgment and tactical advice to represent and defend his clients’ interests, and is our company’s go-to resource on all areas of competition law, in terms of litigation, M&A, and regulatory.’

Key clients

Blue Cross Blue Shield of Louisiana

BMW North America LLC

Breckenridge Pharmaceutical, Inc.

Comcast Cable Communications


Google LLC

Intercontinental Exchange, Inc.

Merck & Co. Inc.

Morgan Stanley

Perrigo Company Plc

Qualcomm Incorporated

Realogy Holdings Corp.

Securus Technologies Inc.

Shell Oil Company

Sumitomo Mitsui Banking Corporation

Sun Pharmaceutical Industries Ltd.

Takeda Pharmaceuticals


Teva Pharmaceuticals

The Clearing House Payments Company, LLC

Tradeweb Markets LLC

Uber Technologies, Inc.

Vyera Pharmaceuticals

Work highlights

  • Representing Google in all facets of Google Play Store Antitrust Litigation, a multi-district litigation pending in the Northern District of California related to the distribution of apps by developers to end users.
  • Represented Vyera Pharmaceuticals and its Swiss parent company, Phoenixus AG, and resolved a lawsuit filed by the FTC and the attorney generals of seven states in the US District Court for the Southern District of New York.

Paul, Weiss, Rifkind, Wharton & Garrison LLP

Paul, Weiss, Rifkind, Wharton & Garrison LLP has a comprehensive defense offering, allowing the team to advise in high-stakes and multi-district litigation concerning allegations of monopolization, price fixing and exclusive dealing, among other matters. The practice particularly excels in litigation concerning financial institutions, with its client roster also featuring industry leaders across a variety of industries including Amazon and Apple. Based in Washington DC, the highly skilled litigator, Karen Dunn has led in major disputes including competitor litigation and class actions concerning leading corporations. Co-chair of the antitrust practice group, Andrew Finch, is based in New York, has previous experience in the DOJ’s antitrust division and is particularly known for his role in private civil litigation, regulatory advocacy, and enforcement matters. DC-based Ken Gallo co-chairs the litigation department and acts as lead counsel in matters concerning technology companies and banks. Bill Isaacson is a highly renowned litigator in DC and commended for his representation of plaintiffs and defendants in antitrust litigation across a variety of industries. William Michael operates from the New York office and acts in investigations and litigation with particular expertise in the telecommunications and media sectors. The team has grown with the arrivals of former senior government enforcement lawyer Joshua Soven from Wilson Sonsini Goodrich & Rosati in the DC office in February 2022, Robert Sperling and Staci Yablon in the New York hub from Winston & Strawn LLP in August 2022, and Eyitayo St. Matthew-Daniel in October 2022, who also joined the New York office and was the former assistant chief of the DOJ’s antitrust division. Another arrival to note is that of Katherine Forrest in New York in January 2023, who was previously at Cravath, Swaine & Moore LLP.

Other key lawyers:

Karen Dunn; Andrew Finch; Ken Gallo; Bill Isaacson; William Michael; Aidan Synnott; Robert Atkins; Brad Karp; Joshua Soven; Robert Sperling; Staci Yablon; Eyitayo St. Matthew-Daniel; Katherine Forrest; Lewis Clayton; Allan Arffa


‘The best in the business. No hesitation to bring my most difficult problems here. Excellent judgment and trial skills. Brilliant, thoughtful, collaborative.’

‘Brilliance, thorough knowledge of their fields and have excellent training. Particularly notable are Robert Atkins, Brad Karp, Allan Arffa and Lewis Clayton.’

Key clients

Amazon.com, Inc.

Apple Inc.

White & Case LLP

White & Case LLP regularly represents clients in high-stakes litigation, particularly class actions concerning consumer protection claims and antitrust conspiracy allegations. The team is well versed in pharmaceutical antitrust matters with a client roster including Pfizer and Samsung Bioepis, whilst continuing to grow its fintech and technology antitrust capabilities. Mark Gidley chairs the practice from Washington DC, offering significant experience in trying criminal and civil antitrust cases, while Christopher Curran often handles precedent setting matters. New York-based Jack Pace often acts as lead counsel for pharmaceutical companies and manufacturers as well as leading fintech companies, recently acting as lead drafter in the briefing behind victories for Apex Clearing Corporation, obtaining the dismissal of class action antitrust complaints. Kathryn Jordan Mims’ practice in DC focuses on class actions, merger enforcement actions and government enforcement actions. Head of the global pharmaceuticals and healthcare group, Peter Carney regularly represents pharmaceutical clients in litigation involving patent settlement agreements, product hopping and switching strategies in federal court and before the FTC. Situated in New York, Martin Toto is recognized as a leading attorney with experience in defending clients in price fixing jury trials while Kristen O’Shaughnessy defends global companies in class action and commercial litigation, with a particular expertise in the pharmaceutical industry.

Practice head(s):

Mark Gidley

Other key lawyers:

Christopher Curran; Jack Pace; Kathryn Jordan Mims; Peter Carney; Martin Toto; Kristen O’Shaughnessy; Kelly Newman; Adam Acosta; Raj Gandesha; Jaclyn Phillips; Heather Burke


‘Adam Acosta and Mark Gidley created an excellent appellate brief on very short notice, immediately appreciating the potential risk for our members and the urgency of the project.’

‘The team I worked with was unique in several ways. First, there were a substantial number of women involved in key roles in the various aspects of this multi-faceted litigation. That is rare and important to clients. Second, the team communicated very well so that everyone understood how the portion of the case they were working on impacted other aspects of the case. The team was amazingly hard working and dedicated to excellence and meeting the client’s needs and the team was extremely personable. I never ran into anyone with an obnoxious attitude. All seemed to love their jobs and enjoy working with each other.

‘I worked with several individuals including Raj Gandesha, Jaclyn Phillips, and Heather Burke. I was very impressed with their intellectual curiosity, indefatigable work ethic and professionalism.’

‘Solid team and great expertise.’

‘We valued having a team that clearly wants to understand the details of our business and build relationships with our internal clients. They are highly responsive and communicative, without over-burdening us with information. They seem adept at navigating the dynamics of a complex joint defense group. Kelly Newman is a stand-out associate, she managed discovery in a complex case with a lot of data and our internal clients see her as a member of the team and value her knowledge.’

Key clients

Apex Clearing Corporation

Gilead Sciences

AbbVie (formerly Forest Laboratories ) and Merz Pharmaceuticals

Samsung Bioepis

Boston Scientific

Vanderbilt University


Gerber Products Company

Hikma Pharmaceuticals

Experian PLC


Nestlé Purina PetCare


Work highlights

  • Represented Apex in the antitrust class actions involving section 1 and section 2 claims which challenged the front-page suspension of all stock trading by Apex on the New York Stock Exchange of the three “meme stocks”.
  • Represented Gilead against the various plaintiff groups, winning dismissal of all claims of alleged overarching conspiracy to monopolize HIV therapies, dismissal of certain activist plaintiffs (including the lead plaintiff), and dismissal of plaintiff Blue Cross Blue Shield Association.
  • Acted for AbbVie (Forest Labs) in the Bystolic antitrust class action; one of the very first reverse payment wins at the motion to dismiss (pleadings) stage.


The ‘outstanding lawyers’ at WilmerHale have recently advised in wage fixing and monopolization litigation for clients such as Meta, Santander Bank and the University of Pennsylvania. Senior partner in Washington DC and head of team Thomas Mueller focuses on global cartel enforcement matters as well as investigation and litigation matters concerning price fixing allegations. Mark Ford is situated in Boston and is well-versed in matters concerning alleged monopolization, price fixing, bid rigging and antitrust IP matters across the pharmaceutical, technology and manufacturing sectors. The highly regarded Steven Cherry in the DC office specializes in investigations and litigation, defending companies and individuals in the US and around the world. Perry Lange has acted for clients in the telecommunications, automotive and energy industries in a diverse range of antitrust matters while Leon Greenfield stands out for his experience in monopolization matters. Trial lawyer David Gringer is based in New York and offers significant experience in defending large corporations including but not limited to technology companies, in litigation against the government and class plaintiffs. Jennifer Milici and Dominic Vote joined the DC office from the FTC in March 2022.

Practice head(s):

Thomas Mueller

Other key lawyers:

Mark Ford; Steven Cherry; Perry Lange; Leon Greenfield; David Gringer; Jennifer Milici; Dominic Vote


‘WilmerHale has outstanding lawyers. Their people make the difference.’ 

‘Steven Cherry is the antitrust expert that we contact, he is easy to reach, and his opinions are always on point.’ 

Key clients


Charles Schwab



Compañía SudAmericana de Vapores

Rohan Ramchandani

Santander Bank


Novelis Inc.

Heritage Guitars, Inc.

Cephalon, Inc.

Reckitt Benckiser Group plc and Reckitt Benckiser Healthcare (UK) Ltd.

Facebook (Meta)

University of Pennsylvania

Intuit (TurboTax)

Salt River Project

Arnold & Porter

Arnold & Porter is known for its representation in a comprehensive range of individual and class action litigation concerning claims of price fixing, monopolization, no-poach agreements, and group boycotts. It particularly excels in the representation of life sciences companies such as Astra Zeneca and also has experience in advising prominent names across a range of other sectors such as Visa and Bloomberg. Debbie Feinstein heads the firm’s global antitrust practice, and offers experience in merger enforcement and investigations, and civil litigation across the retail, food, and automotive parts industry as well as experience from her previous role as director of the Bureau of Competition at the FTC. Feinstein jointly heads the team alongside Jonathan Gleklen, who focuses on assisting clients in the high technology and network industry and experienced litigator James Cooper. Laura Shores has significant expertise in the life sciences industry, having assisted clients such as Novartis. Anne Davis specializes in representing clients in class actions and opt-out litigation. Scott Lent in New York has experience in high-profile litigation with recent work involving price-fixing and anticompetitive distribution allegations. Sonia Kuester Pfaffenroth, who has previously held several senior positions at the DOJ, is also noted. All attorneys are based in Washington DC unless otherwise noted.

Practice head(s):

Debbie Feinstein; Jonathan Gleklen; James Cooper

Other key lawyers:

Laura Shores; Anne Davis; Scott Lent; Sonia Kuester Pfaffenroth

Key clients

AstraZeneca Pharmaceuticals LP

Bausch Health Companies

Bayer/Bayer Crop Science


Bloomberg L.P.

Bristol-Myers Squibb

Elanco Animal Health



Koito Manufacturing



Norfolk Southern


Oakland Raiders/Las Vegas Raiders

Penguin Random House

Sandoz Inc. and Fougera Pharmaceuticals Inc.

Taiyo Yuden

University of Chicago


Work highlights

  • Assisted Oakland Raiders in securing dismissal of a federal antitrust lawsuit and a state court action filed by the City of Oakland against the NFL and its 32 teams, alleging that the league ignored its own relocation policies and violated Section 1 of the Sherman Act by approving the Raiders’ move to Las Vegas.
  • Represented HarperCollins and Penguin Random House in obtaining district court dismissal of putative class action antitrust litigations brought against Amazon.com and the five largest US publishers relating to the sale of electronic and print books. 
  • Advised and represented Mallinckrodt Pharmaceuticals, in federal and state class action and non-class action litigation alleging antitrust and marketing related claims regarding one of its leading products.

Axinn Veltrop & Harkrider

The team at Axinn Veltrop & Harkrider has extensive experience as lead counsel in private treble damage actions and in representing companies and individuals in follow on litigation arising from cartel investigations across the manufacturing and pharmaceuticals industries. Recent work includes defending Fortune 500 companies like Tyson Foods in strategically important disputes including multiple class action suits and private arbitrations. Heads of team include John Harkrider in New York, who acts as lead counsel in cross-border litigation involving claims under section 1 and 2 of the Sherman Act and Michael Keeley in Washington DC, who has experience in trying monopolization and patent jury cases with recent involvement in the Avogen generics price-fixing litigation. Also in DC is Rachel Adcox, who defends major corporations in multidistrict litigation especially in cartel disputes, John Briggs, who offers extensive experience in large antitrust class actions work and Tiffany Rider who is known for her work in international cartel cases and civil follow-on multi district and class action litigation. In New York, Craig Reiser’s litigation spans federal and state courts at both trial and appellate level while Denise Plunkett often defends clients in the payments, financial services and pharmaceutical sectors. New arrival James Attridge, who offers experience as previous deputy chief of staff of the antitrust division in the DOJ, joined the DC office in September 2022.

Practice head(s):

John Harkrider; Michael Keeley

Other key lawyers:

Rachel Adcox; John Briggs; Tiffany Rider; Craig Reiser; Denise Plunkett; Daniel Bitton; James Attridge

Key clients





Independence Health Group (f/k/a Independence Blue Cross)



Magnus Carlsen

Work highlights

  • Defending Tyson Foods as lead counsel in multiple major treble-damage class action litigations alleging industry-wide conspiracies to raise the prices of broiler chickens, pork, turkey, and beef, as well as a conspiracy to depress broiler grower pay.
  • Representing Alvogen in a patent infringement and antitrust litigation regarding Indivior’s opioid dependency treatment drug Suboxone® Film, and the Generic Drugs MDL, a suit alleging participation in an industry-wide conspiracy to raise prices of generic medications through the allocation of markets.

Mayer Brown

Mayer Brown regularly represents in antitrust class actions in the agricultural and food industry with recent representations involving Cargill and Foster Poultry Farms. The firm also excels in multidistrict litigation alleging anti-competitive behavior such as price fixing cartels across other industries including the automotive and education industry. Co-head of the global antitrust and competition practice, Britt Miller in Chicago, represents domestic and international corporations in price-fixing, market allocation, monopolization and conspiracy matters. Based in Washington DC, other heads of team include William Stallings who litigates in the aviation, chemicals and manufacturing sectors and Gail Levine. Also in DC is Carmine Zarlenga , who offers significant disputes experience in high profile antitrust cases, commercial litigation, and intellectual property matters and Adam Hudes, who handles complex private antitrust and commercial disputes and government antitrust enforcements and investigations. Chicago based Daniel Storino is ‘excellent’ and has experience representing multinational corporations and health insurers in cases alleging monopolization, price-fixing, tying, resale price maintenance and exclusive dealing. Stephen Medlock left the firm in October 2022.

Practice head(s):

Britt Miller; William Stallings; Gail Levine

Other key lawyers:

Carmine Zarlenga; Adam Hudes; Daniel Storino; Andrew Marovitz


‘For large and complex commercial litigation, Mayer Brown has not only the legal skills to provide for your needs, but they are quick studies of the people and personalities to ensure that your litigation strategy and approach stays on track.’

‘Excellence in every interaction. I can count on Mayer Brown resources to be excellent in every interaction with me and my CEO and our Board.’

‘Britt Miller and Dan Storino are excellent.’

Key clients

Cargill Incorporated

Foster Poultry Farms

Indiana Packers Corporation/Mitsubishi Corporation

Cermaq Group

Gerber Products Co. and Nestlé SA

Delta Dental Plans Association

The Big Ten Conference

BASF Corporation and BASF SE

Georgetown University

Pandora Media LLC

Work highlights

  • Represent Foster Farmsing Cargill, Indiana Packers and Cermaq in substantial pending antitrust class actions in the agricultural and food industry including the broilers, turkey, pork, beef and salmon antitrust cases.
  • Representing Pandora in antitrust litigation pending in the Central District of California involving licensing issues relating to the streaming of entertainment content.
  • Acting in the high-profile class action litigation involving a number of elite private universities, in which former undergraduates allege that the schools conspired to reduce the financial aid they award through a price-fixing cartel.

O'Melveny & Myers LLP

O'Melveny & Myers LLP litigates in landmark antitrust class actions and civil litigation across the tech, automotive and pharma industries. The team has been involved in the ongoing representation of American Airlines against Sabre Holdings Corporation in a monopolization and rule of reason two-sided market matter. Practice heads include Washington DC based Ian Simmons, a cartel, intellectual property and patent antitrust litigation expert and Ben Bradshaw, whose antitrust practice spans aviation, pharmaceuticals, and consumer electronic litigation. In New York, Andrew Frackman has acted before state and federal courts, acting for individual plaintiffs and defendants in class action matters concerning allegations of sections 1 and 2 of the Sherman Act. DC-based Katrina Robson is well known for trying merger, single-firm conduct and restraint of trade cases. In Los Angeles, Stephen McIntyre has acted as lead partner in industry defining matters for clients such as Google and Samsung Electronics, while antitrust attorney Sergei Zaslavsky in DC has diverse experience across litigation, regulation, and counselling matters.

Practice head(s):

Ian Simmons; Ben Bradshaw

Other key lawyers:

Andrew Frackman; Katrina Robson; Stephen McIntyre; Sergei Zaslavsky

Key clients

American Airlines (previously US Airways)

Anywhere Real Estate


Capital One Financial

Charles Schwab


C.R. Bard


Endo Pharmaceuticals, Inc.

Ford Motor Company

Global Music Rights


Novartis Pharmaceuticals Corporation

Royal Bank of Canada

Samsung Electronics Ltd.

Work highlights

  • Successfully represented US Airways in the long-running litigation against Sabre, the first jury trial of a two-sided market case, concerning a section 2 claim, which the Court of Appeals had reinstated.
  • Represented Novartis as a plaintiff in a patent action and as a defendant in related antitrust action in the Walker Process case where Regeneron alleged that Novartis and co-defendant Vetter Pharma International GmbH sought to block or delay the launch of Regeneron’s Eylea PFS.
  • Represented  C. R. Bard in a three-week jury trial in the Northern District of New York, defending a Sherman Act tying claim brought by AngioDynamics, Inc. AngioDynamics, a competing provider of medical devices, which claimed that C. R. Bard violated the federal antitrust laws.

Quinn Emanuel Urquhart & Sullivan, LLP

The team at Quinn Emanuel Urquhart & Sullivan, LLP frequently represents blue chip companies including Mercedes-Benz and Pilgrim’s Pride in significant civil suits particularly in matters at the intersection of antitrust and intellectual property as well as claims against the financial industry and concerning post-bankruptcy participation in antitrust conspiracies. The trio of lawyers that jointly head up the team include: Mike Bonanno in Washington DC, John Potter in San Francisco and class certification expert Sami Rashid in New York, who offers experience in defending major corporations in investigation and litigation. Los Angeles based Adam Wolfson offers experience in all types of commercial litigation particularly focusing on cases involving antitrust law, class actions, unfair competition, patent and copyright infringement. Also in LA is Kevin Teruya, who has litigated numerous cases on behalf of defendants and plaintiffs across state and federal courts, evidenced in co-leading the defense counsel for Daimler AG and Mercedes-Benz in a parallel class action. Trial lawyer Debra Bernstein heads the firm’s Atlanta office and offers representation in multidistrict and bet-the-company litigation, playing a key role in representing Pilgrim’s Pride in the broiler chicken antitrust case. Ethan Glass left the firm in March 2022.

Practice head(s):

Mike Bonanno; John Potter; Sami Rashid

Other key lawyers:

Adam Wolfson; Kevin Teruya; Debra Bernstein

Key clients

Daimler AG, Mercedes-Benz USA LLC


National Association of REALTORS

International Business Machines Corp. (“IBM)”; Red Hat, Inc.

Vitol, Inc.

SalMar ASA and Scottish Sea Farms Ltd.



Pilgrim’s Pride Corporation

Steward Healthcare


Express Scripts

Work highlights

  • Represented Daimler AG in the German Auto Parts Antitrust Litigation in the Northern District of California.
  • Representing Citadel against allegations of harm to competition.
  • Represented the National Association of REALTORS® in challenges to a policy and successfully opposed an application for a temporary restraining order and preliminary injunction and won motions to dismiss both complaints in the Clear Cooperation Policy litigations.

Shearman & Sterling LLP

Shearman & Sterling LLP is particularly known for its strength in handling antitrust litigation in the financial services sector, also regularly advising in civil matters relating to price-fixing, group boycott and monopolization claims in the aviation and technology sectors. Situated in Washington DC, global antitrust practice leader, David Higbee, has recently represented clients in civil lawsuits including class actions and government investigations. Also heading up the team is Adam Hakki in New York, who has had significant involvement in representing clients such as BNP Paribas in trading market class actions and Patrick Robbins who is located in San Francisco. Richard Schwed represents financial institutions in class actions and private litigation including jury trials and operates in NY.  Other attorneys to note include Stephen Fishbein in New York for his experience in civil litigation concerning monopolisation claims and DC-based litigator Todd Stenerson. Ryan Shores has left the firm.

Practice head(s):

David Higbee; Adam Hakki; Patrick Robbins

Other key lawyers:

Ryan Shores; Richard Schwed; Stephen Fishbein; Todd Stenerson

Key clients

JetBlue Airways Corporation

Paramount Global (formerly Viacom CBS)

Bank of America

Booz Allen Hamilton

BNP Paribas

Sony Interactive Entertainment

Morgan Stanley


1-800 Contacts

Work highlights

  • Achieved a significant victory for Booz Allen Hamilton in the U.S. Department of Justice’s attempt to block its $440 million acquisition of EverWatch.
  • Advising JetBlue Airways Corporation in connection with its strategic Northeast Alliance with American Airlines, including on a lawsuit by the DOJ and six states as well as the District of Columbia alleging that the alliance violates Section 1 of the Sherman Act.
  • Defending Paramount Global and Simon & Schuster in the litigation brought by the DOJ to block the pending sale of Simon & Schuster to German media giant Bertelsmann.

Williams & Connolly LLP

The team of ‘fantastic litigators’ at Williams & Connolly LLP regularly represents major corporations and individuals particularly in the life sciences and tech sectors. The team is headed up by the ‘excellent antitrust litigator’ John Schmidtlein, who has significant experience in civil antitrust suits, defending clients such as Google and AstraZeneca in cases alleging monopolization, price-fixing and coordinated bidding, and ‘excellent trial lawyer’ Jonathan Pitt, who has recently acted in highly publicized matters concerning no poach agreements, price fixing and class actions involving ‘pay for delay’ claims. Also noted by clients is Benjamin Greenblum, defense counsel for high-tech, pharmaceutical and food manufacturing clients. Carol Pruski is an expert in all aspects and stages of litigation from early stage litigation strategies, to discovery and trial. All lawyers mentioned are based in Washington DC.

Practice head(s):

John Schmidtlein; Jonathan Pitt

Other key lawyers:

Benjamin Greenblum; Carol Pruski; Adrienne Van Winkle; Ted Bennett


‘I’ve worked with Benjamin Greenblum and the team. They run a seamless operation and have a superb understanding of the law and facts of the case. They’re also collegial and practical.’

‘The firm is exceptional from top to bottom. Williams & Connolly is the most organized and delivers the most consistently excellent work product of any firm we work with. From the beginning of the case, there is an eye towards trial and, more importantly, winning at trial.’

‘Ted Bennett is an exceptional lawyer and even better person. He has a likability and sincerity that is a tremendous asset as a trial lawyer. Jonathan Pitt is also an excellent trial lawyer and is able to provide concise, actionable advice. Adrienne Van Winkle and Sean Douglass are both rising stars and excellent lawyers who deliver fantastic work product. Adrienne has successfully resolved some extremely difficult and sensitive discovery issues.’

Key clients



Endo Pharmaceuticals

United Therapeutics Corporation


University of Notre Dame

Jazz Pharmaceuticals

Par Pharmaceuticals and Endo Pharmaceuticals

Celgene/Bristol Myers-Squibb

Bank of America

CVS Pharmacy, Inc. and Caremark PCS Health, LLC.

CVS Health

Work highlights

  • Representing Google in the antitrust enforcement actions brought by the U.S. Department of Justice and various State Attorney Generals accusing the company of maintaining an illegal monopoly over internet search and search advertising.
  • Representing Amazon in a major antitrust suit brought by the California AG, alleging that the company caused higher prices across the state and stifled competition.
  • Representing CVS in a civil antitrust action filed by the New York Attorney General related to the Company’s offerings in connection with the 340B Drug Pricing Program.

Winston & Strawn LLP

The team at Winston & Strawn LLP is ‘incredibly effective in their litigation abilities’, providing ‘excellent legal advice and representation’ particularly across the sports and financial sectors. The firm is also well-versed in antitrust matters relating to the tech and food and beverage industries. The team is headed up by New York based attorneys Jeffrey Kessler, who frequently acts as lead counsel in high profile sports and intellectual property antitrust litigation and Eva Cole, whose practice focuses on international cartel investigations and class actions, representing clients in the electronics, sports, retail, and private equity industries. In the firm’s Chicago office is ‘skilled lawyer’ James Herbison who offers significant experience in antitrust litigation involving price fixing and monopolization claims. Heather Lamberg in Washington DC is noted by clients, representing both plaintiffs and defendants in matters concerning predatory pricing, bundling, tying, unfair competition, leveraging as well as monopolization and price fixing claims. New York-based David Greenspan is another name to note. Staci Yablon and Robert Sperling left the firm in August 2022.

Practice head(s):

Jeffrey Kessler; Eva Cole

Other key lawyers:

James Herbison; Heather Lamberg; Johanna Hudgens; Aldo Badini; Susannah Torpey; David Feher; David Greenspan


‘I have collaborated with Winston & Strawn in class actions for a big auto parts cartel case. The firm provided short and practical explanations and the correct calculations of damages. This was very useful for a client that was unfamiliar with the class action system and allowed for the smooth handling of litigations.’

‘I worked with Heather Lamberg in this firm. She is very smart and understands each aspect of relevant cases. She listened to her clients carefully to provide practical explanations and appropriate legal advice swiftly to our Japanese client.’

‘The Winston & Strawn antitrust team is incredibly effective in their litigation abilities. I am consistently impressed with their ability to provide excellent legal advice and representation, which in part stems from their ability to understand the company’s underlying business very well.’

‘Jeffrey Kessler, Aldo Badini, and Susannah Torpey form a tremendously effective antitrust litigation and counsel team. We are extremely pleased to be going on 4 years working with them.’

‘Winston & Strawn had particularly impressive team collaboration – we appreciated working closely with not only the partners, but also the associate team. By interacting with team members across levels, we developed full confidence that the entire team fully understood the nuances of the business and matter. The team was diverse in several aspects (e.g., race, gender, ethnicity) which was important to our leadership team. We had a great experience with the Winston & Strawn team – everyone was knowledgeable and easy to work with.’

‘We have experience with several law firms and Winston & Strawn has some of the most engaged and dedicated individuals we have worked with to date. The senior partners and associates were all very accessible and focused on comprehensively understanding our business. We appreciated that every interaction was efficient, productive, and professional. We enjoyed working with the entire team and specifically collaborated closely with Heather Lamberg, Jeffrey Kessler, and Johanna Hudgens from Winston & Strawn.’

‘James Herbison from the Winston Chicago office leads the team that services all of our legal business (from IP, to antitrust, to employee benefits etc.). Of all the firms that I have worked with, the group at Winston is at the top in terms of client service and responsiveness all while bringing great substantive expertise to the table.’

‘James Herbison is my key antitrust contact; his litigation background and counseling skills are among the best in North America. Rarely do you find a skilled lawyer who is able to provide top notch counseling skills with an actually strong trial background.’

Key clients

Avanci, LLC and Avanci Platform Int’l Ltd.

Camber Pharmaceuticals

Cangrejeros Baseball Club, LLC

Chicago Parking Meters, LLC

Class of professional swimmers (Shields)

Current and former NCAA athletes and an alleged (not certified) class of athletes Claxton Poultry

Delta Dental Insurance Company and affiliates

Discover Financial Services

Englewood Healthcare Foundation

Equifax, Inc.

Harmoni Spice Co. Ltd.

JTEKT Corporation

KAR Auction Services Inc. (Adesa, Inc.)

KSA Lighting & Controls, Inc.

Metaswitch Networks

Motorola Solutions

National Football League Players Association (NFLPA)

National Pork Producers Council

North American Soccer League (NASL)

NorthShore University HealthSystem

NTN Corporation

Nuveen, LLC

Panasonic Corporation and related entities


Relevent Sports Group

Former CEO of DaVita

TreeHouse Foods

WestRock Corporation

Zillow Group, Inc.

Work highlights

  • Represented Avanci in securing Fifth Circuit affirmation of a motion to dismiss  in a closely followed antitrust action brought by plaintiff Continental Automotive Systems, Inc., alleging that the licensing practices of SEP licensor Avanci and co-defendant SEP owners violated sections 1 and 2 of the Sherman Act, among other causes of action.
  • Represented Chicago Parking Meters LLC in successfully dismissing an antitrust action claiming that its 75-year-long, US$1.15b concession agreement to operate Chicago’s on-street parking meters constituted exclusive dealing and a monopoly in violation of the Sherman Act.
  • Secured partial dismissal for KSA Lighting & Controls of plaintiff, Force Partners’ claims which included an alleged exclusive-sales agreement conspiracy to drive competitors out of the Chicago-area lighting products market.

Baker Botts L.L.P.

The team at Baker Botts L.L.P. ‘provides outstanding tactical advice and defends in significant and material litigation’ such as class action lawsuits and competitor litigation in federal and state courts nationwide. Recently defending against price fixing claims and group boycotts in the life sciences and manufacturing sectors, the firm’s client portfolio features the likes of FedEx, Ericsson and Sun Pharmaceuticals. The highly regarded John Taladay co-chairs the practice offering his extensive experience in merger clearance work as well as defending national and international corporations in cartel matters and class actions. Maureen Ohlhausen also heads the team, advises across the retail, telecoms and tech space and is well known for her significant experience nationally and globally on antitrust and FTC-related matters. Senior associate Chris Wilson represents litigants from complaint filing to trial in industries such as industrial manufacturing, telecommunications and pharmaceuticals. All the mentioned attorneys are based in the Washington DC office. Joseph Ostoyich and William Lavery left the practice in April 2023.

Practice head(s):

John Taladay; Maureen Ohlhausen

Other key lawyers:

Chris Wilson; Eric Koons; Stacy Turner


‘Provides outstanding tactical advice and defends in significant and material litigation.’

‘John Taladay, Erik Koons, Chris Wilson, Stacey Turner are all smart, hard-working, responsive, great leaders, tactical and strategic in their defense of their clients.’

Key clients



QVC, Inc.

Caterpillar Inc.

Georgia-Pacific LLC (GP Wood Products LLC)

Koninklijke Philips N.V., Philips North America LLC, Philips Taiwan, Limited and Philips do Brasil Ltda.

ALDI, Inc.

Sandoz, Inc.

Conversant Wireless Licensing SARL

Sun Pharmaceuticals / Taro Pharmaceuticals

Zydus Pharmaceutical, Inc.

Irico Display Devices Co., Ltd.

JSW Steel (USA) Inc. / JSW Steel USA Ohio, Inc.

National Association of Boards of Pharmacy

Olin Corporation


CMC Materials, Inc.

Energy Tranfer LP

Waste Management, Inc.

Work highlights

  • Representing Sun Pharma and Taro Pharma in In re: Generic Pharmaceuticals Pricing Antitrust Litigation, which concerns price fixing.
  • Representing Olin Corporation in several antitrust class action lawsuits filed on behalf of purported direct and indirect purchasers of caustic soda, a by-product of chlorine, alleging that defendants conspired to restrict domestic supply and fix, raise, maintain and stabilize caustic soda prices via capacity reductions, planned maintenance shutdowns, conversations at industry events and price increase announcements.
  • Represents Caterpillar Inc. in an ongoing case brought by International Construction Products LLC (ICP) which alleges that Caterpillar Inc. violated section 1 of the Sherman Act by conspiring with its primary rival and several dealers to boycott an online auction company in order to block ICP from acting as a broker of new Chinese-made construction equipment.

Boies Schiller Flexner LLP

Boies Schiller Flexner LLP has experience in defending high-profile and market leading corporations such as Delta Airlines and General Electric in litigation concerning Sherman Act claims and other market conspiracies. Heads of team include complex litigation specialist Philip Korologos in New York and experienced trial lawyer James Denvir in Washington DC, who has acted in several bet-the-company lawsuits. Also in DC is Michael Mitchell, who represents both plaintiffs and defendants in class actions. Stuart Singer, based in Florida, is also noted.

Practice head(s):

Philip Korologos; James Denvir

Other key lawyers:

Michael Mitchell; Stuart Singer

Key clients

Delta Airlines

General Electric

Davis Polk & Wardwell LLP

The practice at Davis Polk & Wardwell LLP often acts as coordinating counsel in large defense groups in financial services and technology and media related antitrust litigation, with work for high-profile names including NatWest and NBCUniversal. Head of team Arthur Burke operates out of both the firm’s New York and California offices and his practice includes competition law advisory work, investigations and antitrust litigation. Also in New York is Paul Mishkin who advises clients across a range of industries including financial services, pharma, and retail, and Sheila Adams, who frequently acts in a variety of investigations and litigation. Jarrett Arp, based in Washington DC, is also noted for his work in monopolization, price-fixing and no poach agreement litigation.

Practice head(s):

Arthur Burke

Other key lawyers:

Paul Mishkin; Sheila Adams; Jarrett Arp

Key clients


NBC Universal

Dechert LLP

Dechert LLP offers global and nationwide antitrust capabilities to its growing client base which features names such as Endo Pharmaceuticals and Marriott International. The firm is well-versed with a range of litigation including conspiracies related to advertising, bid rigging and price fixing as well as antitrust patent litigation and rule of reason standards. Based in Philadelphia is co-head Steven Bizar, who focuses his practice on trial work, particularly antitrust and trade regulation and is well-regarded for his success in defending against section 1 and 2 Sherman Act cases and class action lawsuits. Also co-heading the team from Washington DC is Mike Cowie, a healthcare and life sciences law expert who focuses on government merger investigations and litigation. Also in Philadelphia are George G Gordon who has significant experience in representing companies in class actions and investigations concerning patent enforcement, pricing concerns and marketing, and Julia Chapman, who is well-versed in all stages of litigation particularly in the life sciences, specialty chemicals and tech fields. Experienced trial lawyer Shari Ross Lahlou, based in DC, acts for Fortune 500 clients including Johnson & Johnson. The group has expanded its team and strengthened its high-tech antitrust expertise with the hires from Orrick, Herrington & Sutcliffe LLP in January 2023 including Jay Jurata in DC, former head of Orrick’s antitrust and competition group, Russell Cohen and Howard Ullman in the San Francisco office.

Practice head(s):

Steven Bizar; Mike Cowie

Other key lawyers:

George G Gordon; Shari Ross Lahlou; Julia Chapman; Jay Jurata; Russell Cohen; Howard Ullman

Key clients

Aetna Inc.

Anadarko Petroleum Corporation; Anadarko E&P Onshore LLC

ACV Auctions, Inc.

Ascensus, LLC; Ascensus Broker Dealer Services, LLC; and Ascensus College Savings Recordkeeping Services, LLC

Citron Pharma, LLC

Clearon Corporation

CVS Health

Commercial Metals Company

Duke Energy

DTE Energy

Eli Lilly & Company

Endo Pharmaceuticals, Inc.

Humana Inc.

Interactive Brokers

Johnson & Johnson

Lannett Company, Inc.

Marriott International, Inc.

Occidental Petroleum Corporation/ Occidental Chemical Corporation

Par Pharmaceuticals

Vortex Commercial Flooring

Work highlights

  • Represented Endo Pharmaceuticals Inc. and Endo Health Solutions Inc. after a three-week jury trial in Chicago in In re Opana ER Antitrust Litigation which raised issues relating to the application of the antitrust rule of reason standards, amongst other matters.
  • Represented Marriott International in TravelPass Group LLC et al v. Caesars Entertainment Corporation et al. against complaints alleging conspiracies related to keyword advertising bidding.
  • Represented Norvatis in patent litigations, patent discovery suits, European Patent Office proceedings, and related competition law investigations in the acquisition and enforcement of a Genentech patent portfolio globally against Lilly.

Orrick, Herrington & Sutcliffe LLP

Orrick, Herrington & Sutcliffe LLP excels in representing clients including Microsoft and LinkedIn on issues at the intersection of antitrust and tech. The team is headed up by Amy Ray in Washington DC, who has recently defended litigation clients in the technology and financial services industries. Also in DC is Eileen Cole, who is a specialist in global cartel investigations and pharmaceutical antitrust cases. Anna Aryankalayil, formerly at the FTC, joined the firm in DC in November 2022. Jay JurataRussell Cohen and Howard Ullman departed from the firm in February 2023.

Practice head(s):

Amy Ray

Other key lawyers:

Eileen Cole; Anna Aryankalayil

Key clients

Microsoft Corporation

ANI Pharmaceuticals Inc.

Delta Dental Plan of California


Work highlights

  • Represent LinkedIn in a high-profile federal case contending that it improperly sought to stop plaintiff hiQ from scraping LinkedIn profiles.
  • Representing Microsoft as a third party in the DOJ and state AG investigations into potentially anticompetitive monopolization by Google of online search, digital advertising or related products and services.
  • Defending ANI Pharmaceutials in direct purchaser and indirect purchaser class actions and direct retailer actions alleging that patent litigation settlements between Forest, the then manufacturer of the drug Bystolic, and certain generic manufacturers violated federal and state antitrust laws and state consumer protection laws by allegedly delaying market entry of generic versions of Bystolic.

Paul Hastings LLP

The practice at Paul Hastings LLP has recently been involved in litigation in the financial services industry concerning manipulation of the price of bonds and interest rates, and also defends against claims of trade secret misappropriation, unlawful tax imposition and vertical distribution agreements in the fashion, engineering and tech sectors. Gary Zanfagna leads the team, offering extensive experience in reviewing transactions and investigations and is based in Washington DC. New York based Barry Sher, chairs the global litigation department and defends large investment banks against price fixing conspiracy claims. Also based in DC are Michael Spafford who represents clients in high-profile government investigations and litigation, and Michael Murray who offers experience in litigation at the appellate and trial level and from his previous position of the principal deputy assistant attorney general in the antitrust division of the DOJ. Anthony Antonelli departed from the firm in March 2022 to take on an in-house position.

Practice head(s):

Gary Zanfagna

Other key lawyers:

Barry Sher; Michael Spafford; Michael Murray

Key clients


RBC Capital Markets, LLC

Nu Dotco, LLC

Align Technology

Etsy, Inc.

Mitsubishi Tanabe Pharma Corporation

Robert Bosch

Sumitomo Mitsui Banking Corporation


Work highlights

  • Representing Barclays Bank PLC and certain of its affiliates in In Re SSA Bonds antitrust litigation.
  • Representing Barclays Capital Inc. in Litovich v. Bank of America, et. al.
  • Representing RBC in In the European Government Bonds Antitrust Litigation, filed in the Southern District of New York.

Simpson Thacher & Bartlett LLP

Simpson Thacher & Bartlett LLP is known for advising and representing both plaintiffs and defendants in antitrust litigation concerning monopolization, price fixing and tying claims across major industries such as chemicals, insurance, pharma, agricultural products, finance, and telecoms. The team is led by antitrust co-chair Sara Razi who has extensive private-sector and government antitrust experience, fellow co-chair John Terzaken, a leading antitrust litigator with a broad antitrust practice including investigations and follow-on litigation and litigation co-chair Jonathan Youngwood in New York, who co-chairs the litigation department. Other heads of team include New York-based antitrust co-chair Peter Guryan and litigation co-chair Lynn Neuner. Abram Ellis is highly regarded in the market and is especially experienced in antitrust litigation involving financial instruments, the healthcare industry and employment matters. All attorneys are based in Washington DC unless otherwise specified.

Practice head(s):

Peter Guryan; Sara Razi; John Terzaken; Lynn Neuner; Jonathan Youngwood

Other key lawyers:

Abram Ellis

Key clients

Apiture, Inc.

Booking Holdings Inc.

Change Healthcare

Covestro LLC

Cross Country Healthcare

Deutsche Bank

HCA Healthcare, Inc.

McKesson Corporation

Micron Technology, Inc.

Tyson Foods

Work highlights

  • Represented HCA Healthcare, Inc. in a class action lawsuit alleging HCA engaged in anticompetitive tactics.
  • Defending Covestro LLC and Covestro AG in multiple class actions alleging a conspiracy to fix prices for MDI (methylene diphenyl diisocyanate) and TDI (toluene diisocyanate).

Skadden, Arps, Slate, Meagher & Flom LLP

Skadden, Arps, Slate, Meagher & Flom LLP routinely handles high-stakes litigation in several regulated sectors including financial services and technology. The team is headed up by global antitrust and competition group leader, Steven Sunshine, who has a broad antitrust practice including litigation and grand jury trials pertaining to claims of price-fixing and cartel conduct. Washington DC antitrust and competition group head Tara Reinhart is a civil litigation and government investigations specialist, who handles class actions and private actions alleging conspiracies to monopolize and claims of reverse payment agreements for pharmaceutical companies. Karen Lent, head of the New York antitrust and competition group, is a sports law specialist and offers experience in counseling and litigation involving price fixing and group boycotts. Also based in New York is Boris Bershteyn, who offers significant experience in financial services antitrust litigation. Julia York is another name to note. All lawyers are based in Washington DC unless otherwise stated.

Practice head(s):

Steven Sunshine; Karen Lent; Tara Reinhart

Other key lawyers:

Boris Bershteyn; Julia York; Clifford Aronson

Weil, Gotshal & Manges LLP

The ‘diverse team of experts’ at Weil, Gotshal & Manges LLP produces ‘high quality work’. The firm represents multinational clients such as Visa and Hilton Hotels in several industry sectors including but not limited to pharma, food and agriculture. Recent work has included a variety of litigation including class actions, no poach labor matters, competitor cases and government enforcement actions. Based in Washington DC is practice head Steven Newborn. In New York is Eric Hochstadt, an expert in antitrust class action litigation and lawsuits between rivals and distributors, while Adam Hemlock often acts in cartel litigation and private antitrust litigation concerning bundling, group boycotts and exclusivity allegations. Brianne Kucerik in DC is noted, recently defending clients against allegations of monopolization and restraint of trade. Carrie Mahan at the DC office departed in June 2023.

Practice head(s):

Steven Newborn

Other key lawyers:

Eric Hochstadt; Adam Hemlock; Brianne Kucerik; Jeff Perry; Daniel Baquet


‘Excellent team. High-octane litigation with real advocates who care about their clients’ businesses.’

‘Very responsive, solid and competent team. We have worked mostly with Adam Hemlock.’

‘The Weil team stood out in its willingness to tackle a matter in an esoteric area of antitrust law that was new to them. They ask the right questions and produce high quality work. They are a team I hope to work with again.’

‘Brianne Kucerik offers top notch client service and is an excellent writer.’

‘Associate Daniel Baquet stands out. Dan practices law at a level well beyond his years as an associate. I was continuously impressed by his organization, client service, and ability to understand complex topics. Dan kept the matter organized and had a high attention to detail beyond that of associates of similar experience I have worked with in the past.’

‘Jeff Perry is an extremely smart lawyer, who is also very practical and excellent at client service. Adam Hemlock always provides sound advice that is tailored to his client’s specific needs and goals.’

Key clients

BASF Corporation

Meta Platforms


Regeneron Pharmaceuticals

Serta Simmons Bedding


Saks Fifth Avenue

Paramount Global (f/k/a ViacomCBS) / Simon & Schuster

Torrent Pharmaceuticals

Michael Foods

Hilton Hotels

Pilgrim’s Pride

Work highlights

  • Serves as lead counsel for Michael Foods, Inc. in an ongoing federal multidistrict antitrust class action and successfully argued and defeated several class certification summary.
  • Representing BASF Corporation in its over 20 class actions alleging that various manufacturers, wholesalers, and retails of crop inputs conspired to boycott the entry of electronic platforms.

Allen & Overy LLP

The antitrust group at Allen & Overy LLP frequently advises clients in the pharma and financial services spaces such as BNP Paribas in price fixing and monopolization civil litigation and class actions. The team is jointly headed by Washington DC based life sciences and technology antitrust expert Noah Brumfield and New York based Elaine Johnston, who recently represented Merz Pharmaceuticals in an antitrust class action and offers experience in a wide range of industries including but not limited to engineering and agricultural products. Todd Fishman is another key attorney located in New York and his practice focuses on the defense of antitrust, commodities markets and securities investigations, class actions and litigation in federal and state courts. John Roberti left the firm in March 2022.

Practice head(s):

Noah Brumfield; Elaine Johnston

Other key lawyers:

Todd Fishman


‘Noah Brumfield, the partner at Allen & Overy’s antitrust practice group, is an antitrust generalist with experience in litigation, regulatory compliance and government investigations. Noah is also a master strategist whose plan takes into account as many variables as possible which increases the likelihood of success.’

‘Todd Fishman is a seasoned antitrust litigator with successful track records in multiple US antitrust litigations. Todd shows a clear and concise roadmap for client in the early stage of the litigation, which helps client to anticipate the upcoming milestones and take proactive planning measures.’ 

Key clients

Hytera Communications

Merz Pharmaceuticals

Barclays Bank Plc

BNP Paribas (BNPP)

Samsung SDI

Samsung SDI, Samsung SDI America, other members of the Samsung SDI group

Work highlights

  • Co-counsel to Merz Pharmaceuticals in the In re Namenda Antitrust Purchaser Litigation, an antitrust class action suit brought against Merz Pharmaceuticals and Forest Laboratories.
  • Representing Barclays in multidistrict class action proceedings in In re Commodity Exchange Gold Futures and Options Trading Litigation and In re London Silver Fixing, Ltd. Antitrust Litigation.


The team at BakerHostetler specializes in litigation brought by competitors and concerning section 2 of the Sherman Act for an array of clients including multinational corporations and local businesses. In Philadelphia, head of the firm’s national antitrust and competition practice, Carl W. Hittinger advises on a full spectrum of antitrust matters concerning both defendants and plaintiffs. In Washington DC, Marc Schildkraut offers his previous experience at the FTC’s Bureau of Competition and focuses on multibillion dollar mergers, civil investigations and litigation while Jack Fornaciari is an international cartel investigations expert and often acts in follow-on defense class action antitrust litigation. DC-based Danyll W. Foix defends companies in individual and class actions and counsels on day-to-day antitrust questions and compliance. Ann O’Brien left the firm in February 2023.

Practice head(s):

Carl W. Hittinger

Other key lawyers:

Marc Schildkraut; Jack Fornaciari; Danyll W. Foix

Key clients

Alon USA Energy Inc

Bobrick Washroom Equipment Inc

Data Device Corp

Brandywine Village Associates


American Bar Association – Antitrust section

Findaway World LLC



Soshin Electric Company Ltd.


Cahill Gordon & Reindel LLP

The antitrust department at Cahill Gordon & Reindel LLP, operating in New York, routinely represents large financial institutions such as Credit Suisse in bank-related antitrust litigation, which includes achieving the recent victory for Credit Suisse in the long running FX antitrust class action litigation involving allegations that the defendants manipulated the foreign exchange currency market. Co-head Herbert Washer chairs the firm’s litigation department, acting as defense counsel in securities, derivative-related and commodities matters and in several class action cases based on market manipulation and price-fixing claims. Experienced trial lawyer Edward Moss has acted in commercial, securities and antitrust litigation for an array of clients such as airlines, healthcare and pharma companies, tech providers and financial institutions. Co-head David Januszewski, Joel Kurtzberg and Jason Hall are also noted for their extensive experience in financial services litigation. Elai Katz  departed the firm in August 2023.

Practice head(s):

Herbert Washer; David Januszewski

Other key lawyers:

Herbert Washer; Edward Moss; David Januszewski; Joel Kurtzberg; Jason Hall


‘This team is profoundly professional and knowledgeable in this field.’

Elai Katz is very experienced and knowledgeable. He’s always available for a consultation in the most efficient manner.’

Key clients

Credit Suisse

American Express


Arch Capital Group


ICON plc


Deutsche Bank

JP Morgan

S&P Global

Work highlights

  • Representing Credit Suisse in a multi-district litigation where plaintiffs filed over 70 complaints alleging that banks colluded and manipulated USD LIBOR in violation of antitrust laws, RICO, and state laws resulting in billions of dollars in damages.
  • Defending Credit Suisse in class action filed in federal court in New York alleging antitrust law violations involving trading in the multi-trillion dollar market for U.S. dollar-denominated supranational, sovereign, and agency (SSA) bonds.
  • Secured a victory for Credit Suisse after an eight-day jury trial in a class action alleging that 16 of the largest Wall Street banks had conspired to violate the federal antitrust laws by fixing prices in the foreign exchange currency market. Fifteen of the banks settled for more than $2.3 billion combined, leaving Credit Suisse to try the case alone. The jury found Credit Suisse did not participate in the alleged price fixing conspiracy.

DLA Piper LLP (US)

DLA Piper LLP (US) stands out for its prominence in high profile and bet-the-company class action and civil litigation work spanning the pharmaceutical, insurance, and sports industries. Practice head Lisa Tenorio-Kutzkey is situated in San Francisco and routinely assists large corporations in price fixing and market allocation conspiracy matters. Washington DC-based David Bamberger’s practice consists of litigating complex antitrust and trade regulation matters across federal and state courts. First-chair trial lawyers include John Gibson in Los Angeles, who specializes in healthcare and high-tech class action and multi-district litigation, and John Hamill in Chicago, who defends clients in a full spectrum of commercial litigation including antitrust and commercial litigation particularly in the telecoms, sports and healthcare areas.

Practice head(s):

Lisa Tenorio-Kutzkey

Other key lawyers:

David Bamberger; John Hamill; John Gibson; Matthew Jacobs; Jessica Heim; Brian Boyle

Key clients

Aquis, Inc.

AMN Healthcare

McCormick & Company, Inc.

Komatsu America Corp.

Maxell Corp.

International Franchise Association

Gemological Institute of America

World Resources Institute

Eimer Stahl LLP

The ‘highly practical and knowledgeable’ team at the litigation boutique Eimer Stahl LLP regularly assists leading national and international clients including prominent household names such as Pilgrim’s Pride and LG Electronics, with antitrust audit and compliance and litigation matters. Nathan Eimer, the ‘go-to attorney for bet-the-house litigations’, is an antitrust litigation expert and coheads the team with Vanessa Jacobsen, who specializes in antitrust litigation and class action defense across a wide variety of industries. Michael McCluggage has substantial experience in antitrust litigation, counseling of clients and investigations across various industries, with recent work concerning the agricultural, food manufacturing and insurance sectors. Daniel Birk is well-versed in defending clients in price fixing class actions and multidistrict litigation. All the above-mentioned attorneys are based in Chicago.

Practice head(s):

Nathan Eimer; Vanessa Jacobsen

Other key lawyers:

Michael McCluggage; Daniel Birk; Brian Chang


‘Eimer Stahl has a stable of highly practical and knowledge attorneys that utilize their experience and know-how to achieve results. Even though it is relatively smaller, compared to other law firms, we have continually been impressed by the work produced and their ability to provide strategic, yet constructive legal guidance that we can implement with a high degree of success.’

‘Nate Eimer is an exceptional attorney. Nate’s greatest asset is his ability to seamlessly understand the client’s business needs and positions, without sacrificing any strategic position legally, resulting in consistent success in litigations. He is the go-to attorney for bet-the-house litigations.’

‘Eimer Stahl offers top-tier, strategic and efficient services.’

Key clients

LG Electronics Inc.; LG Electronics U.S.A., Inc.; LG Display Co., Ltd.; LG Display America Inc.; LG Electronics Taiwan Taipei Co.; LG Corporation; and LG Chem, Ltd., LG Chem America, Inc., and LG Energy Solution, Ltd.

Masonite Corporation

Land O’Lakes, Inc.

Humana, Inc.

Pilgrim’s Pride Corporation

The Dow Chemical Company

Gerdau Ameristeel Corporation

CNA Financial Corporation

SK hynix, Inc.

Fox Corporation

International Paper

Cooper Farms

Work highlights

  • Represented Korean semiconductor supplier SK hynix Inc. and its American subsidiary against state and federal antitrust claims alleged by putative classes of direct and indirect purchasers of DRAM, a type of semiconductor memory.
  • Representing two unrelated defendants, Winfield Solutions, LLC, a subsidiary of Land O’Lakes, and Federated Cooperatives Limited (in Canada), in a multidistrict antitrust litigation alleging an industry-wide conspiracy to boycott online competitors in the market for certain agricultural crop inputs.
  • Representing G Electronics entities named as defendants in an antitrust case filed by the government of Puerto Rico alleging a conspiracy to fix prices of cathode ray tubes.

Freshfields Bruckhaus Deringer LLP

Freshfields Bruckhaus Deringer LLP offers clients ‘significant geographic reach and a diverse team of highly competent attorneys’ with recent work involving claims in the tech and consumers products sectors, for a growing client base consisting of global industry leaders such as Google and MIT. Practice head Eric Mahr has considerable experience in defending clients in civil and criminal investigations, enforcement actions and regulatory proceedings in the US and in Europe, and is currently acting as lead counsel defending Google in a multidistrict litigation. Julie Elmer is an active trial lawyer, representing the likes of United Airlines while Andy Ewalt has previously litigated as counsel to the Director of Litigation at the antitrust division of the DOJ and recently led the team which won the dismissal of antitrust claims concerning an open bidding agreement between Google and Apple. All the attorneys listed are based in Washington DC. Jamillia Ferris joined the firm in September 2022 from Wilson Sonsini Goodrich & Rosati. Richard Snyder  left the firm in January 2023.

Practice head(s):

Eric Mahr

Other key lawyers:

Julie Elmer; Andy Ewalt; Jamillia Ferris


‘We experienced the Freshfields team as knowledgeable, service-minded and solution-oriented. They always deliver high-quality advice that takes into account not only the legal aspects but also the commercial elements. They are efficient and are available when the client requires it.’

‘Eric Mahr is not only a very skilled lawyer that combines legal expertise, extensive practical experience and commercial understanding, but also a very pleasant person. He exudes self-assurance and security that rubs off on the client. He has the ability to explain complex legal issues in an easy and understandable way and provide sound and clear advice.’

‘The firm has a significant geographic reach and a diverse team of highly competent attorneys.’

Key clients


Grieg Seafood

Cargill, Inc.

Massachusetts Institute of Technology (MIT)

Hachette Book Group, Inc.

Change Healthcare

Hogan Lovells US LLP

The antitrust practice at Hogan Lovells US LLP routinely represents clients in the life sciences, agricultural products, financial services and engineering sectors in class actions, treble-damages actions and investigations. The practice is headed up by Justin Bernick, who litigates a range of antitrust issues including price fixing, market allocation and vertical and horizontal agreements, Charles Loughlin, former FTC chief trial counsel with significant experience in the financial, pharmaceutical and technology industries, Katie Hellings, and Benjamin Holt who has litigated antitrust cases and competition law matters. William Monts is another name to note for his extensive experience in a range of antitrust disputes for major international companies and domestic clients. The lawyers mentioned above are located in the firm’s Washington DC office.

Practice head(s):

Justin Bernick; Benjamin Holt; Charles Loughlin; Katie Hellings

Other key lawyers:

William Monts

Key clients

UnitedHealth Group

Viatris (formerly Mylan)



Multiple Blue Cross Blue Shield plans

Agri Stats, Inc.

Edwards Vacuum



Credit Agricole

Yale University

Elevance (formerly Anthem)

Health First


King & Spalding LLP

King & Spalding LLP handles antitrust litigation for major clients in several industries including education, financial services and healthcare. Its client roster features names such as Deutsche Bank, which it represented against allegations of manipulation of the foreign exchange benchmark prices. The team is led from Washington DC by Jeff Spigel who counsels clients undergoing investigation and advises on strategies, and Norm Armstrong, who offers public and private sector experience and has a broad antitrust practice including civil and criminal investigations and litigation. In Atlanta, Jeff Cashdan focuses on criminal and civil cartel matters and other civil antitrust actions with a recent matters concerning price-fixing claims in the hospitality industry. Other key attorney’s include Atlanta-based partner Emily Newton and DC-based Chris Yook who advises clients on antitrust implications and represents clients in government enforcement and civil litigation.

Practice head(s):

Norm Armstrong; Jeff Spigel

Other key lawyers:

Jeff Cashdan; Emily Newton; Chris Yook

Key clients


ACON Investments


BASF Corporation

Cornell University


Deutsche Bank



Evangelical Community Hospital


Genuine Parts Company


H.I.G. Capital

Hunter Douglas

J.R. Simplot Company

ManTech International Corporation

Ochsner Health System

Peloton Interactive, Inc.

Piedmont Healthcare

Queen’s Health System

Quikrete Holdings, Inc.

Rice University

The Home Depot

Trafigura Trading LLC

United Parcel Service

Viserion Grain, LLC

Westrock Company

Work highlights

  • Represented BASF in its antitrust trial against Ingevity Corp.
  • Representing both Cornell University and Rice University in a class action complaint against 16 universities alleging a conspiracy on financial aid.
  • Represented Trafigura in responding to California Attorney General investigation into gasoline prices in California in the related class action lawsuit alleging violations of federal and state antitrust laws.

McDermott Will & Emery LLP

McDermott Will & Emery LLP offers a full spectrum of antitrust services including work on major class actions, cartel defense and private antitrust litigation and particularly stands out for its representations in the healthcare industry as well as consumer goods and tech. Global head of the antitrust practice Raymond Jacobsen advises on mergers and acquisitions and antitrust litigation in Washington DC and has significant experience in matters in the defense, life sciences and energy space. Michelle Lowery in Los Angeles is well-versed in counseling and litigating high-profile cases in the healthcare, manufacturing, and technology area. Nicole Castle provides legal counsel in criminal and civil multidistrict class action litigation concerning Sherman Act violations in New York. In Chicago, Katharine O’Connor and Stephen Wu focus their practices on complex litigation and investigations brought by regulators in an array of sectors, from healthcare to consumer goods. Former federal regulator and plaintiff’s class action lawyer Lesli Esposito in DC is also a key team member.

Practice head(s):

Raymond Jacobsen

Key clients

Kent Thiry

Amneal Pharmaceuticals

Outpatient Medical Center Employee Litigation Apple Inc.

Motorola Mobility LLC

Permanente Medical Group

Envision Healthcare Corporation and Envision Physician Services, LLC

Apple Inc.

Impax Laboratories/Amneal Pharmaceuticals


Work highlights

  • Representing two defendants, Impax Laboratories and Amneal Pharmaceuticals, in an antitrust multidistrict litigation in the United States.
  • Representing Apple Inc. in connection with the App Store antitrust cases filed by Epic and two purported classes of consumers and app developers, all of which are pending in the N.D. California.

McGuireWoods LLP

McGuireWoods LLP regularly defends corporations, trade associations and individuals in follow-on treble damage civil litigation and multi-district class actions which concerns allegations of price fixing to exclusive dealing and no-poach agreements. Mark Kinghorn chairs the firm’s practice and is based in North Carolina. Chicago-based Amy Manning is a key attorney who handles criminal and civil antitrust matters particularly in the life sciences, healthcare, and transportation sectors. In Richmond, Howard Feller focuses on antitrust litigation and investigations and Brent Justus has a broad antitrust practice, focusing particularly on cartel defense and litigation covering vertical conspiracies and boycotts among other claims. In Chicago, Angelo Russo handles both criminal and civil litigation across federal and state courts especially for healthcare and life sciences clients, while Sarah Zielinski assists clients with antitrust compliance and representation in complex litigation, investigations, and competitor lawsuits.

Practice head(s):

Mark Kinghorn

Other key lawyers:

Amy Manning; Howard Feller; Brent Justus; Angelo Russo; Sarah Zielinski; Holden Brooks

Key clients

Argos USA Corp.

CSX Transportation Inc.

Elite Staffing, Inc.


Work highlights

  • Representing Argos, a US cement and ready-mix concrete manufacturer, in connection with several antitrust matters, including two civil antitrust lawsuits involving allegations of price-fixing in the ready-mix concrete and cement markets in coastal Georgia and South Carolina, one of which is a class action.
  • Represented Elite in an antitrust lawsuit brought by the Illinois Attorney General that raises novel questions regarding the scope of the Illinois Antitrust Act.

Morrison Foerster

The team at Morrison Foerster is principally known for its experience in defending clients in litigation concerning Sherman Act price-fixing and monopolisation claims particularly in the tech and life sciences space, and is increasingly advising digital platforms on antitrust matters such as algorithmic pricing systems. The team is jointly headed up by Washington DC-based Alexander Okuliar who represents clients in competition advocacy and litigation and Lisa Phelan, a criminal investigations, litigation and enforcement specialist. Also in DC is trial lawyer David Cross and Mary Kaiser, who represents domestic and multinational companies in a range of antitrust and competition matters including IP-related claims, class actions and other complex litigation. Situated in the firm’s San Francisco hub are Eliot Adelson and expert in antitrust litigation Bonnie Lau, who has extensive experience defending class actions, multidistrict litigation in a range of industries including tech, financial services and manufacturing.

Practice head(s):

Alexander Okuliar; Lisa Phelan

Other key lawyers:

David Cross; Mary Kaiser; Eliot Adelson; Bonnie Lau; Megan Gerking; Michael Miller; Natalie Fleming Nolen

Key clients




Tencent Holdings Limited



Unity Software

Axalta Coating Systems

Matsuo Electric Co, Ltd.

McGrath RentCorp


ON Semiconductor

DSP Group, Inc.



SoftBank Group Corp. & Arm Limited

Former CEO of G4S

Nexstar Media Group, Inc


Tiz Inc. d/b/a Provi


Restoration Hardware


Work highlights

  • Representing Provi in an antitrust case filed in the federal district court in Illinois that alleges Southern Glazer’s Wine & Spirits and Republic National Distributing Company have conspired in a group boycott and monopolization to eliminate competition.
  • Representing Nexstar Media Group, Inc in an antitrust investigation by the DOJ and follow-on class action litigation related to the broadcast television spot advertisement market.
  • Representing Matsuo Electric Co., Ltd in its defense of a price-fixing cartel class action.

Norton Rose Fulbright

Norton Rose Fulbright US LLP regularly acts as trial counsel in no poach and class action litigation particularly in the technology, pharmaceutical and entertainment industries, with recent work including representing Bausch Health and Phillips 66 in class actions pertaining to price fixing claims. Global head of antitrust and competition, Robin Adelstein splits her time between New York and Washington DC and litigates complex and multi-jurisdictional cases in the pharmaceutical, consumer products and other industries. In DC Amanda Wait, a former FTC lawyer, co-heads the antitrust team with Adelstein and advises deal makers and litigants. Operating from both the firm’s Houston and DC offices are litigators Layne Kruse, who has represented clients in the petroleum production, transportation and healthcare sectors, and Eliot Turner who defends and prosecutes claims under sections 1 and 2 of the Sherman Act. Michael Swartzendruber is another key lawyer. New arrival Carsten Reichel joined from the criminal division of the DOJ in July 2022.

Practice head(s):

Robin Adelstein; Amanda Wait

Other key lawyers:

Layne Kruse; Eliot Turner; Michael Swartzendruber; Carsten Reichel; Vic Domen

Key clients

Phillips 66

Qualcomm Incorporated

Valeant Pharmaceuticals North America LLC (now known as Bausch Health US, LLC), Valeant Pharmaceuticals International (now known as Bausch Health Americas, Inc.), and Oceanside Pharmaceuticals, Inc. (all subsidiaries of Bausch Health Companies, Inc.)

Office of the Attorney General of Texas

AMC Theatres

Cinemark USA, Inc.

Southwest Airlines Co.

Flotek Industries

Farmers Insurance

Landry’s Inc.

Texas A&M University 12th Man Foundation

Royal Dutch Shell plc, Shell Oil Company, Pennzoil-Quaker State Company, and Jiffy Lube International, Inc.

Takeda Pharmaceutical Company, Ltd. (and affiliates/subsidiaries) and Eli Lilly and Company

Waste Management of Texas, Inc.

Texas Children’s Health Plan, Inc.

Republic National Distributing Company, Central Liquor Company, L.P. and Best Brands of Delaware, LLC

Availity L.L.C.

TotalEnergies Marketing USA, Inc.

Work highlights

  • Represented Phillips 66 in a putative antitrust class action case brought by direct purchasers and consumer purchasers of gasoline in California that alleged Phillips 66 conspired with other major US oil refineries to raise gas prices in the state.
  • Advised and represented Qualcomm Incorporated on global IP and competition matters including litigation against regulators and Apple that spanned the globe.
  • Representing an international pharmaceutical company in a large antitrust conspiracy claim in which the plaintiffs allege horizontal price fixing, market allocation and bid rigging among and between manufacturers and sellers of generic pharmaceuticals in putative antitrust class actions that have been consolidated into multidistrict litigation.

Proskauer Rose LLP

Proskauer Rose LLP has a strong record in defending companies in litigation across major industries including agriculture, consumer products, pharma, and sports. The team has also grown its offering and expertise in matters at the intersection of antitrust and technology law with the Antitrust Tech Task Force. Advising in cases involving allegations of price-fixing, bid rigging and monopolization, its client roster features names such as the National Football League. In Washington DC, the practice is jointly headed by Colin Kass, an antitrust and commercial litigation expert who handles the full range of antitrust and unfair competition litigation, and Christopher Ondeck, founder of the firm’s price gouging team and first-chair antitrust trial lawyer and litigator, who leads on numerous high-profile matters. Recently promoted partner John Ingrassia, based in DC, is also a key attorney and offers extensive experience in counselling businesses on antitrust issues.

Practice head(s):

Colin Kass; Christopher Ondeck

Other key lawyers:

John Ingrassia; David Munkittrick; Stephen Chuk

Key clients

Wayne-Sanderson Farms

National Football League (NFL)


Major League Soccer (MLS)

Lupin Pharmaceuticals

Sanofi Pasteur

Church & Dwight

Henry Schein

RWJ Barnabas Health


Butterball LLC

Daybreak Foods

United Egg Producers

Foresight Technology Corp.

Medley Capital

Space X

Dollar Tree

Agriculture Companies

Work highlights

  • Representation of Wayne-Sanderson Farms in defending numerous class actions filed both by classes of direct purchasers and indirect purchasers, who assert a damages claim against the defendants of $48 billion.
  • Representing National Football League in actions filed by apparel distributors and NFL merchandise purchasers in federal court in New York alleging that the NFL’s agreements with Fanatics, Inc., a manufacturer, supplier and distributor of licensed sportswear and merchandise, violate state and federal antitrust laws.
  • Representating of Butterball, LLC in a case involving an alleged information exchange conspiracy, in violation of the Sherman Act and various state laws.

Reed Smith LLP

Reed Smith LLP has experience in a full spectrum of antitrust matters, including acting in DOJ and FTC investigations and representing clients in antitrust class action lawsuits across several industries including life sciences, healthcare, financial services and manufacturing. Recent work has involved advising clients on claims pertaining to section 5 of the FTC Act as well as price-fixing, monopolization and market allocation. Operating in Pittsburgh, practice head Michelle Mantine offers counselling and wide-ranging litigation experience for clients in the primary manufacturing, financial and healthcare sectors. Christopher Brennan is a specialist in economic theory, competition, and antitrust law, acting in financial services, healthcare and cartel litigation. Regulatory enforcement specialist Will Sheridan has litigated numerous antitrust healthcare matters, while trial lawyer Daniel Booker is another key contact. Edward Duffy left the firm in June 2022 to join the DOJ. Debra Dermody is no longer at the firm.

Practice head(s):

Michelle Mantine

Other key lawyers:

Christopher Brennan; Will Sheridan; Daniel Booker; Edward Schwartz; Justin Kontul; Scot Hasselman


‘The team is really knowledgeable about TCPA cases and incredibly flexible in terms of innovative settlement advice.  They used inhouse technology including their GravityStack subsidiary. They also have an excellent FCA team.  I am quite impressed by the professionalism, experience and expertise of the teams.’     

‘On the TCPA cases, we use Justin Kontul, who really knows this area and class actions. For FCA we use Scot Hasselman, who is excellent in health care matters.’ 

Sheppard, Mullin, Richter & Hampton LLP

The antitrust practice at Sheppard, Mullin, Richter & Hampton LLP has an expertise in the multifamily, technology and food and beverages sectors, and offers experience acting for key clients such as Samsung Electronics in multidistrict litigation alleging monopolization and exclusionary conduct, and Cyient in an antitrust class action concerning no poach agreements. In Washington DC, head of the antitrust team Leo Caseria has successfully litigated many cases involving allegations of antitrust violations under the Sherman and Clayton Acts and advises clients on many competition issues relating to compliance and intellectual property. Of counsel Michael Cohen has recently been involved in private civil antitrust lawsuits for the firm’s longstanding client The Reynolds and Reynolds Company. Ann O’Brien, formerly at BakerHostetler, joined the firm’s DC office in February 2023. Michael Scarborough and Dylan Ballard left the firm in January 2023.

Practice head(s):

Leo Caseria

Other key lawyers:

Michael Cohen; Helen Eckert; Joy Siu

Key clients

Continental Automotive Systems Inc.

Samsung Electronics Co., Ltd.

Mastercard International


Jain Irrigation Inc.

Samsung Electronics America, Inc.

Fuyao Glass America Inc.

ACT, Inc.

San Francisco Association of Realtors

Reynolds & Reynolds Company

Cal Portland Company

Cyient Inc.

Odem International

Markstein Beverage

Work highlights

  • Representing and defending Cyient Inc. in a putative antitrust class action, in which defense contractor employees accuse defense contractor Raytheon Technologies (through its Pratt & Whitney division) of orchestrating an illegal conspiracy with its subcontractors to restrict the hiring and recruiting of engineers and skilled laborers working on aerospace projects.
  • Representing Hartford HealthCare Corporation and its subsidiaries, including Hartford Hospital, in litigation filed by Saint Francis Hospital and Medical Center in January 2022.
  • Representing CalPortland Company in its antitrust claim against the four major US railroads.

Vinson & Elkins LLP

Vinson & Elkins LLP regularly represents both plaintiffs and defendants in high-stake civil antitrust lawsuits, specializing in the airline, electronics and energy and chemicals sectors. The team is co-headed by antitrust investigations expert Darren Tucker and Hill Wellford, who counsels and assists clients in the energy, pharma, and tech industries. Trial lawyer Alden Atkins  focuses on antitrust class actions and arbitrations across a spectrum of industries, and Craig Seebald’s core practice consists of defending international and domestic clients in cartel and price-fixing investigations. In Houston, commercial and business litigator Jason Powers  also leads on many matters.  The practice has recently expanded its team with the hires of Stephen Medlock from Mayer Brown in October 2022 and the January 2023 arrival of Mike Scarborough and Dylan Ballard in San Francisco from Sheppard, Mullin, Richter & Hampton LLP. All attorneys are based in Washington DC unless specified otherwise.

Practice head(s):

Darren Tucker; Hill Wellford

Other key lawyers:

Craig Seebald; Alden Atkins; Jason Powers; Stephen Medlock; Mike Scarborough; Dylan Ballard

Key clients

Google LLC


Wanhua Chemical (America) Co., Ltd.

AirTran Airways

Targa Resources Corp.


Southwest Airlines, Inc.

Calumet Specialty Products

Maxell, Ltd. And Maxell Corporation of America


Switchback II Corporation

Enable Midstream Partners, LP

Group 1 Automotive, Inc.

ioneer Lrd.

The Sinclair Companies

Liberty Oilfield Services Inc.


Direct Energy

Noble Energy, Inc.

Plains All American

Chevron Phillips Chemical Co.

Vida Capital, Inc.

National Association of Chain Drug Stores

Oregon Dental Service d/b/a Delta Dental of Oregon

Delta Dental Plan of Wyoming d/b/a Delta Dental of Wyoming

United States Steel Corporation

Lukoil Pan Americas LLC

Foster Poultry Farms

HeartBrand Holdings, Inc.


Huntsman International

Phadia US Inc.

Magellan Crude Oil Pipeline Company, L.P.

AK Steel Corporation, et. Al – railroad MDL


Akin frequently advises clients in a variety of industries including food and beverages, financial services and chemical manufacturing in civil litigation and class actions pertaining to claims of anticompetitive behavior such as price-fixing and no poach agreements. Head of team Corey Roush has significant experience in antitrust class action litigation and often counsels clients in several industries to assist with regulatory compliance, while Gorav Jindal also leads on many matters offering his expertise in transactional antitrust matters as well as antitrust litigation. All mentioned attorneys are based in Washington DC.

Practice head(s):

Corey Roush

Other key lawyers:

Gorav Jindal; Brian Rafkin; Matthew Schmitten

Key clients

Antech Diagnostics, Inc.

Bausch & Lomb

Norwegian Seafood Council (NSC)

Oversea-Chinese Banking Corporation Limited

Olin Corporation

Work highlights

  • Represented Antech, which operates a network of veterinary diagnostic laboratories that provide services to veterinarians and veterinary practices across the country, in a putative antitrust class action.
  • Represented a former EVP and COO of one of the largest providers of outpatient surgery in the U.S. in an antitrust investigation by DOJ’s Antitrust Division’s Criminal Division that led to the first federal criminal indictment of a company for a no-poach agreement.
  • Represented the NSC, a Norwegian quasi-governmental entity that gathers and disseminates data from Norwegian salmon producers and promotes Norwegian salmon around the world, in an antitrust class action alleging price fixing.

Alston & Bird LLP

Alston & Bird LLP stands out for its experience in defending national and international companies, start-up firms and trade associations in pharmaceutical, financial and tech-related antitrust litigation. Recent work has involved competitor litigation, wage fixing lawsuits and class actions alleging violations of sections 1 and 2 of the Sherman Act for a client roster that features household names such as Nokia and Dell. The team is jointly headed by antitrust and financial services litigation specialist Teresa Bonder in San Francisco, Adam Biegel, who offers extensive counseling and litigation experience from the firm's Washington DC hub, and trial lawyer Matthew Kent who is based in Atlanta, and leads in bet-the-company matters such as litigation involving price fixing cartels and more recently, matters involving claims of reverse payment settlements in the pharma industry. Also based in San Francisco is cartel litigation expert Valarie Williams who often defends Fortune 100 companies in multidistrict matters.


Practice head(s):

Adam Biegel; Matthew Kent; Teresa Bonder

Other key lawyers:

Valarie Williams; Andrew Hatchett

Key clients

Nokia Corporation

Truist Financial Corporation

Fieldale Farms Corporation

Glenmark Pharmaceuticals

Dell Technologies

Novartis Pharmaceuticals

Auto Auction Services Corp.

Sandoz Inc.

Work highlights

  • Represented Nokia Corporation against antitrust claims brought by car parts supplier Continental Automotive Systems Inc., alleging Nokia conspired to inflate licensing rates for cellular connectivity technology in violation of sections 1 and 2 of the Sherman Act and California’s Unfair Competition Law.
  • Representing Fieldale Farms Corporation in a multi-defendant antitrust lawsuit against the major chicken producers which involves allegations of price and supply manipulation of chickens sold to consumers in violation of federal antitrust laws.
  • Representing Glenmark Pharmaceuticals in multiple putative class and individual actions filed by purchasers of branded Bystolic (nebivolol) in which the plaintiffs allege that Glenmark and Forest Laboratories, Inc. violated federal and state antitrust laws.

Baker McKenzie LLP

Baker McKenzie LLP has significant experience in handling multijurisdictional antitrust matters, and is particularly noted for its role as counsel for defendants in follow-on class actions, cases involving section 2 monopolization claims, and cartel litigation. The practice is co-headed by Mark Hamer, who often acts as lead counsel in antitrust litigation matters and DOJ antitrust investigations, and Creighton Macy, who assists clients with all aspects of the antitrust regulatory and litigation process in a variety of sectors including media, tech, financial services, pharma, and consumer goods. Brian Burke has significant experience in representing clients in civil and criminal investigations and related litigation. Other key attorneys include antitrust experts John Fedele and Jeffrey Martino in New York. Unless otherwise specified, the lawyers mentioned above are based in Washington DC.

Practice head(s):

Mark Hamer; Creighton Macy

Other key lawyers:

Brian Burke; John Fedele; Jeffrey Martino


‘Very commercially minded when providing advice, rather than simply an academic consideration of the law.’

‘Creighton Macy is very responsive, provides practical guidance, and is very efficient with the work produced.’

‘Mark Hamer and John Fedele stand out.’ 

Key clients


Quest Diagnostics

EDR LightBox

NHK Spring

Bayer AG




Benefytt Technologies

Sika AG


Helen of Troy


Work highlights

  • Acted as lead counsel for PRADA in no-poach antitrust litigation in the Eastern District of New York (Brooklyn).
  • Representing the lead defendant, NHK Spring, in a series of private damages antitrust class actions filed on behalf of all end users and resellers of products containing hard disk drives, alleging collusion in the sale of components for hard disk drives.

Ballard Spahr LLP

Ballard Spahr LLP frequently acts in high-stake matters in the pharma, agricultural, retail and financial sectors. The firm is well versed in monopolization and conspiracy claims, and also has experience handling allegations of tying and no poach agreements. Practice head Leslie John specializes in pharmaceutical and healthcare antitrust litigation and counsels on antitrust compliance particularly in relation to mergers and acquisitions. Jason Leckerman chairs the firm’s litigation department and acts on both sides of antitrust and competition matters. Stephen Kastenberg has extensive experience in representing private and Fortune 100 multinational companies in litigation involving collusive dealing, price discrimination and more. Other key attorneys include monopolization and conspiracy case expert Edward Rogers and New York based James Mitchell, who focuses on both criminal and civil litigation. Jay Fastow is no longer at the firm. All lawyers are in Pennsylvania unless otherwise stated.

Practice head(s):

Leslie John

Other key lawyers:

Jason Leckerman; Stephen Kastenberg; Edward Rogers; James Mitchell; Elizabeth Weissert


‘Obviously very knowledgeable. Excellent communicators which can summarize key issues and decision points excellently. Proactive in terms of staying on top of developing issues and requests for critical information. Trusted business partners.’

‘Everyone on the civil litigation team is incredibly responsive. They are always willing to take a call to discuss a matter in detail.’

‘They love the work they do and truly seem to enjoy working through legal issues from a variety of perspectives. They are knowledgeable (or work to become knowledgeable) no matter what the issue.’

‘Jason Leckerman and Leslie John are outstanding partners in the civil litigation/class action defense practice. They are responsive, diligent, personable, and professional in every way. Both are very well-versed in the subject matter and highly efficient.’ 

‘I work with outside counsel across the country, and the Ballard Spahr team is among the best in the civil litigation and class action defense practice. They are responsive, diligent, and attentive to detail in ways that few firms are. In addition, they are highly knowledgeable in subject matter areas. The law firm places an emphasis on diversity and collaborates very well with in-house lawyers. The firm also has arranged to coordinate continuing legal education seminars for in-house lawyers that are among the very best that I have attended.’

Key clients

GlaxoSmithKline LLC

American Board of Internal Medicine

Princeton University

QuEST Global-NA, Inc.

MarketPlace PHL

Electric Utility Industry Sustainable Supply Chain Alliance

Johnson & Johnson and Janssen Biotech


CSL Behring, LLC

Partnership for Safe Medicines

Wawa, Inc.

Corteva Agriscience, Pioneer Hi-Bred International, Inc.

Mountaire Farms

Mayor and City Council of Baltimore

City of Richmond

Washington Suburban Sanitary Commission

Fairfax County Water Authority

Commissioners of Public Works of the City of Charleston

South Carolina Public Service Authority

Mastercard International Incorporated

Eisai Inc.

Peter Ghavami

Kemp & Assoc., Inc.

Teva Pharmaceuticals

Cohen & Gresser LLP

Cohen & Gresser LLP excels in representing clients in both single litigant and class action antitrust lawsuits. The firm is particularly known for its work in defending against allegations of cartel behavior, monopolization, exclusionary conduct and defending clients in civil enforcement actions. The team also operates in a niche market representing disruptors in the internet and high-tech industry. Head of team Melissa Maxman has litigation experience at both trial and appellate level, acting for domestic and foreign corporations on global antitrust matters. The practice was strengthened in March 2022 with the hire of John Roberti, a leading cartel class action lawyer with significant experience in high-profile litigation, from Allen & Overy LLPRonald Wick is a key player, and his practice involves advising clients on antitrust compliance and defending against unfair competition claims. All the above-mentioned attorneys are based in Washington DC.

Practice head(s):

Melissa Maxman

Other key lawyers:

John Roberti; Ronald Wick


‘John Roberti provides extremely practical, hands-on competition law advice. Rare in the industry!’

Key clients

Goldman Sachs & Co.

Merz Pharmaceuticals GmbH

Samsung SDI

Tri-Union Seafoods, LLC

Robert Bosch GmbH, Bosch Electrical Drives Co., Ltd., and Robert Bosch LLC

Sierra Space Corporation

Work highlights

  • Representing Merz Pharmaceuticals in antitrust litigation involving an alleged reverse payment in the settlement of patent litigation, a topical issue in the life sciences space.
  • Representing Samsung SDI, Samsung SDI America, and other members of the Samsung SDI group in their defence of various civil antitrust actions alleging participation in international price-fixing conspiracies in relation to Cathode Ray Tubes.
  • Representing the Bosch Companies in the multidistrict Automotive Parts Antitrust Litigation.

Cooley LLP

Cooley LLP frequently litigates in matters involving claims of anticompetitive conduct such as price-fixing, monopolization and cartels, representing clients across a range of industries including education, financial services, technology, and sports. The team is headed up by Washington DC-based Dee Bansal, who offers experience in antitrust litigation involving major corporations in the technology, data and media space. Also co-heading the team is first-chair antitrust lawyer Ethan Glass in DC, who joined the firm from Quinn Emanuel Urquhart & Sullivan, LLP in March 2022 and Beatriz Mejia in San Francisco, who specializes in international cartel investigations and multidistrict litigation concerning monopolization claims. Another notable arrival is that of Kathy O’Neill from the DOJ in September 2022.

Practice head(s):

Dee Bansal; Ethan Glass; Beatriz Mejia

Other key lawyers:

Kathy O’Neill


‘Ethan Glass is a creative and tenacious litigator with a talent for distilling complex concepts into effective trial themes.’

Key clients


California Institute of Technology


Gray Television


National Association of Realtors

Liberty Coin

Work highlights

  • Representing Google LLC, against claims that Google’s removal of Unlockd’s application from Google’s app store was anticompetitive conduct in violation of Section 2 of the Sherman Act.
  • Representing California Institute of Technology (Caltech) in a putative class action alleging that 17 universities, including Caltech, violated section 1 of the Sherman Act, by participating in a trade group that discussed financial aid formulas and used those formulas to set financial aid packages for students.
  • Representing college sports conference, PAC-12, in a putative class action in which the plaintiffs allege that the National Collegiate Athletic Association, Pac-12 Conference, Big Ten Conference, Big Twelve Conference, Southeastern Conference, and Atlantic Coast Conference, have conspired to limit student athletes’ ability to be compensated for the use of their name, image, and likeness, in violation of Section 1 of the Sherman Act.

Debevoise & Plimpton LLP

Debevoise & Plimpton LLP works across several jurisdictions and industries on a wide range of antitrust matters, including notable recent involvements in cases where plaintiffs allege bid rigging and price-fixing conspiracies. The team is co-chaired by a quartet of attorneys including: Ted Hassi in Washington DC who focuses on antitrust litigation and obtaining merger clearances; intellectual property law expert Michael Schaper  in New York who also offers antitrust litigation and counseling; and litigation partner Erica Weisgerber, also in New York and a member of the special solutions team, who focuses on bankruptcy litigation and antitrust matters.

Practice head(s):

Ted Hassi; Michael Schaper; Erica Weisgerber


‘Good team work, coordinated by the partners themselves, and show a keen interest in their clients’ concerns.’

‘Diligent teams and try to address clients’ concerns as much as possible.’

Key clients

Albertsons Companies, Inc.

American Express

Armando Kellum

Artera Services, LLC

AVEVA Group plc

BTD Recovery Holdings 4, LLC

Carestream Dental

Clayton Dubilier & Rice and Portfolio Companies

Cornerstone Building Brands


DBS Bank Ltd.

Domtar Corporation

Dover Corporation

Elliott Management Corporation

Global Atlantic

Great American Outdoors Sports Group

Kindred Healthcare

Peabody Energy Corporation

Prudential Financial, Inc.


S&S Activewear

Sandoz, Inc.’s former CEO, Armando Kellum

Sun Life Financial

The Bank of Yokohama Ltd

Toyota Motor Sales, U.S.A. and Toyota Canada, Inc.

TPG Capital

Tractor Supply

Verizon Communications Inc.

Welsh, Carson Anderson & Stowe

Wilsonart International Holdings

Kasowitz Benson Torres LLP

Kasowitz Benson Torres LLP are known for their involvement in large multidistrict and class action litigation, particularly in the pharmaceutical, food and beverage, and entertainment industries. Acting for defendants, as well as corporate plaintiffs, the firm’s client roster features names such as MLW Media and Teva Pharmaceuticals. The practice is jointly headed up by Hector Torres, who has significant experience in federal and state courts prosecuting antitrust and other commercial cases, and first-chair litigator and trial lawyer Sheron Korpus, who handles commercial, securities and antitrust disputes. All the mentioned attorneys are situated in New York.

Practice head(s):

Hector Torres; Sheron Korpus

Key clients

Teva Pharmaceuticals

Ford Motor Company

Pilgrim’s Pride

CEO of Prospero Pharmaceuticals and StoneCorner Group, and Co-Founder of Vyera Pharmaceuticals




MLW Media

Work highlights

  • Representing Teva Pharmaceuticals and its US subsidiary Actavis in defending many antitrust class actions brought by private plaintiffs, as well as an antitrust action brought by 48 States, the District of Columbia, and Puerto Rico, which are consolidated in an MDL in the Eastern District of Pennsylvania that allege price-fixing of over 100 generic drugs.
  • Representing Pilgrim’s Pride in a criminal price fixing investigation by the Department of Justice relating to the sales of broiler chicken products in the United States.

Ropes & Gray LLP

The team at Ropes & Gray LLP offers multijurisdictional disputes experience and support on claims alleging monopolization, group boycotts and intellectual property antitrust, among other anticompetitive behaviour. In Washington DC is complex business litigation specialist Mark Popofsky  who co-heads the team, represents clients such as Google and whose practice includes jury trials, class actions, cartel litigation and arbitrations. Also co-heading the team and splitting her time between Boston and New York is healthcare law expert Jane Willis who handles antitrust matters for clients in a range of industries including consumer products, sports and transportation. Other noteworthy attorneys include DC-based Samer Musallam who represents clients in private litigation, price-fixing class actions and monopolization lawsuits and Chong Park who handles litigation and government enforcement investigations.

Practice head(s):

Mark Popofsky; Jane Willis

Other key lawyers:

Samer Musallam; Chong Park

Key clients

Google Inc.

John Hopkins University

Advocate Aurora Health

State Street Bank and Trust Company

Work highlights

  • Representing Google as litigation counsel in the DOJ’s monopolization case against Google, filed in the U.S. District Court for the District of Columbia in October 2020, alleging monopolization of various markets involving Internet search.
  • Representing State Street and its subsidiary, Currenex, Inc. in a class action on behalf of users of Currenex, an electronic trading platform for foreign exchange transactions.
  • Representing Advocate Aurora Health in a class action lawsuit brought by a self-funded insurance plan on behalf of similarly situated plaintiffs concerning managed care contracting practices.

Troutman Pepper

Troutman Pepper  has a strong record representing clients in monopolization claims, antitrust cartel class actions as well as reverse payment and other pharma industry competition litigation. Advising a variety of clients including Fortune 500 companies as well as new entrants to the market, the team is particularly strong in the life sciences and healthcare industries, as well as the agri-food space. Heads of team include Daniel Anziska in New York and Barbara Sicalides in Philadelphia, who routinely handles a broad spectrum of antitrust matters including class actions and litigation challenging agreements among competitors. Also based in Philadelphia is Robin Sumner, who offers significant experience in litigating matters concerning the biopharma and healthcare sectors. Jeremy Heep in Philadelphia is also noted and offers his previous experience as trial attorney with the DOJ. Melissa O’Donnell, who previously worked in an in-house position and has significant antitrust and health care law experience, returned to the firm’s Philadelphia office as a partner in January 2023. Jan Levine is no longer at the firm.

Practice head(s):

Barbara Sicalides; Daniel Anziska

Other key lawyers:

Robin Sumner; Jeremy Heep; Melissa O’Donnell

Key clients


J.M. Smucker

United Egg Producers

Hikma Pharmaceuticals

Centrum Valley Farms, L.P. and Trillium Farm Holdings, LLC

Moran Foods

Phillips Mushroom Farm and Creekside Mushroom

Provco Group

Thompson Tractor

Work highlights

  • Represented industry groups, United Egg Producers and United States Egg Marketers and United Egg Association, against claims of an unlawful conspiracy to reduce the supply and thereby raise the price of eggs in a six week trial.
  • Representing Centrum Valley Farms L.P. and Trillium Farm Holdings LLC in a putative class action pending in Texas federal court alleging that producers, distributors, and sellers raised prices for eggs after the start of the COVID-19 pandemic in violation of the price gouging provisions of Texas’s Deceptive Trade Practices Act.
  • Represents Del Monte in multidistrict litigation, pending in federal court in California.