Nathaniel Regenold is an associate in Cohen Milstein’s Antitrust practice. He represents a broad range of individuals and businesses in civil litigation, with a focus on multi-district class actions and antitrust litigation.
Prior to joining Cohen Milstein, Nathaniel clerked for the Honorable Paul L. Friedman of the United States District Court for the District of Columbia and for the Honorable Jane Kelly of the United States Court of Appeals for the Eighth Circuit. Before that, he was a litigation associate at a highly regarded global law firm where he focused on antitrust and other civil litigation matters.
During law school, Nathaniel was the vice president of the Asian Pacific American Law Students Association, an executive editor of the Georgetown Law Journal, and a member of the Order of the Coif.
Prior to law school, Nathaniel served as a Peace Corps Volunteer in Liberia, where he taught high school math and science, and worked as a legal assistant with the Florence Immigrant and Refugee Rights Project in his home state of Arizona, providing legal assistance to detained adults facing threat of deportation.
Nathaniel is proficient in Spanish.
- Co-Vice Chair of the Amicus Committee of the Committee to Support Antitrust Laws (COSAL) for 2024
- New York
- District of Columbia
- Georgetown University Law Center, J.D., magna cum laude, 2018
- Washington University in St. Louis, B.A., with College Honors, 2011
- Law Clerk, the Hon. Paul L. Friedman, U.S. District Court, District of Columbia (2021 – 2022)
- Law Clerk, the Hon. Jane Kelly, U.S. Court of Appeals for the Eighth Circuit (2020 – 2021)
Current Cases
Pacific Steel Group v. Commercial Metals Company, et al.
Pacific Steel Group v. Commercial Metals Company (N.D. Cal.): Cohen Milstein represents Pacific Steel Group, a steel rebar fabricator, in challenging the lawfulness of an agreement extracted by one of the world’s largest steel companies (CMC) from the world's only manufacturer of steel rebar micro mills to refuse to build a micro mill for Pacific Steel in any location that could threaten CMC's rebar monopoly in Southern California or otherwise allow Pacific Steel to become a more formidable competitor in the downstream rebar fabrication market.
In re Seroquel XR Antitrust Litigation
In re Seroquel XR Antitrust Litigation (D. Del.): Plaintiffs allege that Defendant AstraZeneca Pharmaceuticals LP struck deals with generic drug manufacturers Handa Pharmaceuticals LLC, Par Pharmaceutical Inc. and Accord Pharmaceuticals Inc., inducing the generics to delay launching generic versions of Seroquel XR, AstraZeneca's prescription drug treatment for schizophrenia, bipolar disorder and depression, for five years in exchange for AstraZeneca committing to delay the launch of its own authorized generic.
In re Lipitor Antitrust Litigation
In re Lipitor Antitrust Litigation (D.N.J.): Plaintiffs allege that Pfizer, the manufacturer of the cholesterol drug Lipitor, the best-selling drug in pharmaceutical history, conspired with Ranbaxy, the generic manufacturer, to delay its introduction of a generic Lipitor product. On August 21, 2017, the Third Circuit handed a sweeping victory to Plaintiffs, reviving their antitrust claims.
Past Cases
Treasuries Antitrust Litigation
In re: Treasuries Securities Antitrust Litigation (S.D.N.Y.): Cohen Milstein is Co-Lead Counsel in this ground-breaking antitrust and Commodity Exchange Act class action alleging many of the nation’s biggest banks manipulated the multi-trillion-dollar market for U.S. Treasuries and related instruments.