I'll research this company before writing the profile.
Company overview. Ground Transportation Systems USA Inc., now Hitachi Rail GTS USA Inc., is the U.S. rail-systems subsidiary of Hitachi Rail Ltd., itself part of Hitachi, Ltd. (TSE: 6501). The entity was formerly Thales Transport & Security, Inc.; it became Ground Transportation Systems USA Inc. on April 11, 2022, and Hitachi Rail GTS USA Inc. on June 3, 2024. Its listed U.S. address is 99 Park Avenue, Suite 1120, New York, NY. Ownership changed when Hitachi Rail closed its €1.66 billion purchase of Thales' Ground Transportation Systems business on May 31, 2024; Hitachi Rail reported €7.3 billion FY2023 pro-forma combined revenue and 24,000 employees worldwide. No separate headcount or revenue is disclosed for this U.S. subsidiary.
Products / services. It supplies rail signaling, train control and fare-collection systems to North American transit agencies — automatic train control (ATC), communications-based train control (CBTC), interlocking, telecom/SCADA supervision — plus OEM maintenance and support. Public procurement records identify it as original equipment manufacturer for systems including the Jacksonville Skyway ATC and the SFMTA Central Subway ATC. The acquired Thales GTS business comprised four segments: mainline signaling, urban rail signaling, integrated communications and revenue collection.
Litigation posture. An operating company, not an NPE: across one tracked case it appears only as a defendant (0 as plaintiff). Metrom Rail, LLC v. Ground Transportation Systems USA Inc. (subsequently Hitachi Rail GTS USA Inc.) et al. was docketed March 22, 2023 in the District of Delaware — a venue that, unlike the Eastern District of Texas, is not a plaintiff haven. Plaintiff Metrom Rail is a small Illinois rail-safety supplier asserting UWB-based collision-avoidance patents over a New York MTA pilot project.
Notable context. The Delaware docket is a severed branch of Metrom's earlier D. Del. action (C.A. 22-49-RGA, Judge Andrews) against Siemens Mobility, the GTS entity, Humatics and Piper Networks; claims against Humatics and Piper were dismissed, while direct, indirect and willful infringement claims proceeded against Siemens and the GTS entity. The GTS entity joined Siemens, Humatics and Piper in IPR petitions (IPR2023-00468/-470) against Metrom's U.S. Patents 9,043,131 and 8,812,227; the PTAB found the claims obvious and the Federal Circuit affirmed in part on May 11, 2026. The Delaware case was later stipulated for transfer to the Southern District of New York, where Metrom has pursued related claims.