More than 50 years of landmark results

Since 1967, Lowey Dannenberg has represented investors and major corporations in complex litigation, recovering billions of dollars on their behalf.

Solutions for Complex Cases

Professional Recommendations

“[Lowey Dannenberg] has considerable experience in litigating ‘some of the largest class actions throughout the country.’ . . . . The quality of their representation is also evidenced by the fact that Class Members, including sophisticated institutional investors, have not objected to the Settlement. The Court has no reason to doubt the quality of their representation.”

Hon. Gregory H. Woods, July 7, 2022 Fairness HearingTranscript, at p. 24 in In re JPMorgan Precious Metals Spoofing Litigation 18 Civ. 10356 (S.D.N.Y.)

“The court appreciates class counsel’s taking on these challenges and class counsel’s able navigation of these hard problems, in developing the case on behalf of the putative class, and in bringing contentious settlement negotiations to a successful outcome.

I might add too that the settlement was not only successful. Compared with many analogous cases, it was also prompt, a fact that brings obvious advantages to the class.”

Hon. Paul Engelmayer, May 31, 2022 Fairness Hearing Transcript, at p. 30 in In re JPMorgan Treasury Spoofing Litigation, 20 Civ. 3515 (S.D.N.Y.)

Recent Cases

Roche v. Aetna, Inc.

Healthcare, Notable

By Gerald Lawrence

Lowey Dannenberg is defending Aetna in a class action related to state anti-subrogation laws. Minerley v. Aetna Inc., et al., 13-cv-1337 (D.N.J.). Lowey Dannenberg has defended and won dismissal of several similar class action lawsuits against health insurance clients: Wurtz v. Rawlings Co., LLC, 2016 WL 7174674 (E.D.N.Y. Nov. 17, 2016); Meek-Horton v. Trover, et al., 910 F.Supp. 2d 690 (S.D.N.Y. 2013); Potts v. Rawlings Co. LLC, 897 F.Supp. 2d 185 (S.D.N.Y. 2012).

Federated Investment Management Company, et al., v. Republic of Argentina

Antitrust

By Vincent Briganti

Lowey obtained emergency injunctive relief on behalf of Federated Investors, one of the largest investment firms in the country with over $363 billion in assets under management, preventing the Government of Argentina from canceling outstanding bonds with a face value of more than $500 million, which had been erroneously tendered by those bondholders. Federated Investment Management Company, et al., v. Republic of Argentina, et al., 10 Civ. 4324 (S.D.N.Y. 2010) (Griesa, J.).

Juniper Networks

Notable

By Vincent Briganti

Lowey Dannenberg served as lead counsel, representing the New York City Pension Funds and related class members, alleging that Juniper Networks, Inc. fraudulently concealed the backdating of millions of stock options, resulting in a $900 million financial restatement.

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News

Massachusetts Judge Certifies Class for Thirds-Party Payers over Pay-For-Delay, Generics Medication case

Sep 22, 2025

Lowey Dannenberg, on behalf of named plaintiff Premera Blue Cross, is leading a class on behalf of Third-Party Payers of Amitiza (Lubiprostone) against Takeda Pharmaceutical Company Ltd. and related entities. Plaintiff allege that drug manufacturers Takeda and…