Westinghouse Air Brake Technologies Corporation (Wabtec) builds freight locomotives, braking and signaling systems, rail components, and software used by freight railroads, transit agencies, and industrial operators. The Pittsburgh-based public company (NYSE: WAB) sells original equipment, digital solutions, and aftermarket services worldwide; it combined with GE Transportation in 2019 and traces its roots to George Westinghouse’s 19th‑century air brake business. Its portfolio spans rolling stock, parts, condition‑monitoring, and train control platforms.