Wikipedia
Argentren
Argentren S.A. was an Argentine private company that operated the Belgrano Sur and Roca railway services in Buenos Aires Province for about one year until the Government of Argentina rescinded the agreement with the company in March 2015. Since then, the Mitre and San Martín line are operated by State-owned company Operadora Ferroviaria Sociedad del Estado (SOFSE).
The company was part of the Emepa Group, a consortium that has also been operating the Belgrano Norte Line through Ferrovías since 1994.