Since then, the Mitre and San Martín line are operated by State-owned company Operadora Ferroviaria Sociedad del Estado (SOFSE).

[5] On May 24, 2012, the contract with TBA to operate the Mitre and Sarmiento lines was revoked by the Government of Argentina after the Once station rail disaster.

[2][3] Emepa Group also owned Ferrocentral, a railway company formed with Nuevo Central Argentino to run passenger services to Rosario, Tucumán and Córdoba cities of Argentina.

[7][8] When UGOFE and UGOMS were dissolved, Corredores Ferroviarios (a company part of Grupo Roggio, which also owns Metrovías, a company that operates the Buenos Aires Subte and Urquiza line since 1994) and Argentren took over the Mitre / San Martín and Belgrano Sur / Roca lines, respectively.

[4] The contract with the company had been signed in February 2014, committing Argentren to operate the Roca and Belgrano Sur lines.