Antitrust

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Fighting corporate monopolies and defending market competition

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Antitrust Litigation

Lowey Dannenberg:
leaders in high-stakes
Antitrust Litigation

Fighting corporate monopolies and cartels and defending market competition

Lowey Dannenberg has 50 years of experience representing sophisticated clients in complex securities, antitrust and RICO-based litigation, successfully achieving billions of dollars in recovery on behalf of consumers and investors. As one of the premier antitrust law practices in the United States, Lowey serves clients impacted by anticompetitive conduct and forced to pay higher prices in a wide range of markets, from consumer products to financial derivatives, as a result of conspiracies, boycotts, exclusive dealing arrangements, and other misconduct. Our experienced antitrust class action lawyers can help you chart the best course through antitrust litigation to fight activities that restrain price competition.

Led by

Dedicated antitrust attorneys who are passionate about promoting fair competition 

Vincent Briganti

Antitrust, Commodities

Vincent Briganti is Chairman of Lowey Dannenberg, P.C. He is the head of the Firm’s Antitrust and Commodities and Derivatives Practice Groups.

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Peter D. St. Phillip

Antitrust, Healthcare

Peter St. Phillip is the firm’s head of litigation and represents institutional clients in large-scale cost recovery litigation.

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Cases

Artuso Pastry Foods Corp. v. Packaging Corporation of America, et al. 1:25-cv-08856 (N.D. Ill.)

On October 28, 2025, Lowey was appointed Interim Co-Lead Class Counsel for purchasers of Containerboard Products in Artuso Pastry Foods Corp. v. Packaging Corporation of America, et al. 1:25-cv-08856 (N.D. Ill.)

Plaintiff alleges that the largest producers of containerboard, linerboard and containerboard products (including cardboard boxes), colluded to raise prices more than 30% through multiple parallel price increases between 2020 and the present.

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Euribor

Lowey Dannenberg is leading the prosecution against the global financial institutions responsible for the setting of the Euro Interbank Offered Rate (“Euribor”), a global reference rate used to benchmark, price and settle over $200 trillion of financial products, including Euribor futures contracts traded on the NYSE LIFFE exchange.

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Swiss Franc LIBOR

Lowey Dannenberg is the court-appointed sole lead counsel in a class action against numerous global financial institutions responsible for setting the London Interbank Offered Rate for the Swiss Franc (Swiss Franc LIBOR).

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SIBOR/SOR

Lowey Dannenberg is the court-appointed sole lead counsel in a class action against numerous global financial institutions responsible for setting the London Interbank Offered Rate for the Swiss Franc (Swiss Franc LIBOR).

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London Silver Fixing

Lowey Dannenberg was appointed co-lead counsel in a class action, alleging that a group of 8 major financial institutions colluded to fix the outcome of the London Silver Fix, a global benchmark that impacts the value of more than $30 billion in silver and silver financial instruments.

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In re Passenger Tires Antitrust Litig., 5:24-md-03107

Lowey Dannenberg, P.C. serves as co-lead counsel on behalf of farmers in a large antitrust class action against Syngenta and Corteva, alleging that their loyalty programs on certain pesticide active ingredients unlawfully raised prices on pesticides sold to American farmers in violation of the Sherman Act.  

Real Results

Fighting corporate monopolies and defending market competition

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DOJ Announces New Antitrust Whistleblower Rewards Program

by | September 10, 2025 | Antitrust, Blog, Whistleblower | 0 Comments

On July 8, 2025, the U.S. Department of Justice Antitrust Division announced the creation of a new Whistleblower Rewards program. This program will allow the Antitrust Division to offer rewards to individuals who report antitrust crimes. Individuals may qualify for…

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California Scheming: Gas Price Manipulation Hits the West Coast

by | May 18, 2020 | Antitrust, Blog, Commodities | 0 Comments

The gas market, with its pricing benchmarks based on self-reported transactions, has long been a fertile field for price manipulation. For example, in In re Natural Gas Commodity Litigation, No. 03 CV 6186 (S.D.N.Y. Oct. 14, 2004), plaintiffs alleged that energy…

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“The Lowey[] complaint reveals a particularly outstanding effort due to the thorough and contemporaneous nature of the allegations…[and] feature[s] attorneys with laudable expertise in handling class actions in general and CEA and antitrust law in particular.”

~ Hon. Valerie E. Caproni, United States District Judge, S.D. New York

Landmark Outcomes

Lowey Dannenberg is the court-appointed co-lead counsel in a class action alleging that several major financial institutions colluded to fix the outcome of the London Silver Fix, a global benchmark that impacts the value of more than $30 billion in silver and silver financial instruments. To date, Lowey has secured $38 million in settlement. The case is pending before the Hon. Judge Valerie E. Caproni.

In re London Silver Fixing Ltd. Antitrust Litigation, Case No. 14-md-2573 (VEC) (S.D.N.Y.)

Additional Notable Achievements

Our longstanding experience has led to billions of dollars recovered for investors and set a precedent in antitrust policies.

 

 

Cardizem

In 1998, Lowey Dannenberg filed the first-ever pay-for-delay class action on behalf of consumers and third party payers against Aventis S.A. and Andrx Corp., alleging the brand pharmaceutical company engaged in anti-competitive agreements regarding the blood pressure drug Cardizem CD to prevent more affordable generic equivalents from entering the market.

Lowey served as lead counsel and argued before the United States Court of Appeals for the Sixth Circuit in a landmark decision that unanimously affirmed a summary judgment of per se liability against defendants. Lowey successfully negotiated an $80 million class settlement.

In re Cardizem CD Antitrust Litigation, MDL No. 1278 (E.D. Mich.)

Wellbutrin

Lowey Dannenberg served as class counsel in a generic pay-for-delay case against GlaxoSmithKline and Valeant (f/k/a Biovail), alleging they formed an anti-competitive agreement to prevent the market entry of a cheaper, generic version of the blockbuster antidepressant drug, Wellbutrin XL.

Lowey achieved a $11.75 settlement with Valeant.

In re Wellbutrin XL Antitrust Litig., Case No. 08 Civ. 2433 (E.D. Pa.)

Litton Loan Servicing

Lowey Dannenberg served as class counsel and recovered $4.1 million on behalf of a class of homeowners who alleged that several mortgage servicers colluded to force them to buy unnecessary lender-placed insurance on their property.

Lyons v. Litton Loan Servicing LP, et al., No. 13-cv-00513 (S.D.N.Y.)

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