In Seagate Technology LLC v. NHK Spring Co., (9th Cir. Jan. 8, 2026), Seagate Technology LLC, a California-based manufacturer of hard disk drives, and two of its foreign subsidiaries (in Thailand and Singapore) brought antitrust claims against NHK Spring Co., Ltd., a Japanese supplier of suspension assemblies—critical hard drive components. NHK pleaded guilty in a separate federal criminal proceeding to conspiring with competitors to fix the prices of these suspension assemblies, which were sold both in the United States and abroad. The majority of the price-fixed assemblies purchased by Seagate’s foreign entities occurred outside the United States, with only finished hard drives being imported into the country.
The United States District Court for the Northern District of California initially found that the Sherman Act did not apply to Seagate’s claims related to suspension assemblies purchased abroad, ruling that these were “wholly foreign transactions” outside the reach of U.S. antitrust law. The court also determined that the Foreign Trade Antitrust Improvements Act (FTAIA) import commerce exclusion did not apply since the assemblies themselves were not directly imported into the United States, and that Seagate could not show the necessary domestic effect giving rise to its foreign injury. The district court granted NHK’s motion for partial summary judgment in full and denied Seagate leave to amend its complaint for indirect purchaser claims.
The United States Court of Appeals for the Ninth Circuit vacated the district court’s summary judgment order. The appellate court held that while the import commerce exclusion did not apply, Seagate alleged a viable theory under the FTAIA’s domestic effects exception: NHK’s price-fixing in the United States led to higher prices domestically, which then directly caused Seagate’s foreign entities to pay inflated prices abroad. The Ninth Circuit remanded the case for the district court to determine whether Seagate had presented sufficient evidence of proximate cause to survive summary judgment.