Banco Santander SA, Citigroup and JPMorgan are leading lenders for a $1 billion financing package for Transportadora de Gas del Sur SA, according to sources familiar with the matter. The deal represents significant backing for energy infrastructure development in Argentina's promising Vaca Muerta shale region.

Transportadora de Gas del Sur SA operates Argentina's main natural gas transportation network serving the Vaca Muerta formation, one of the world's largest shale reserves. The financing package will support critical infrastructure expansion as Argentina seeks to increase its natural gas production capabilities amid growing global energy demand.

The involvement of major international banks signals strong market appetite for energy financing in Latin America. Vaca Muerta has attracted significant foreign investment despite Argentina's economic challenges, with this latest deal underscoring the formation's strategic importance to global energy markets.