Mexican billionaire Carlos Slim has expanded his investments in the country’s energy sector after Grupo Carso agreed to acquire a 30 per cent working interest in Mexico’s offshore Block 30 from French energy company TotalEnergies.

Grupo Carso disclosed the deal in a stock exchange filing, stating that the acquisition will be carried out through its oil and gas subsidiary, Zamajal. The value of the transaction was not made public.

Following the agreement, Harbour Energy will remain the operator of Block 30 with a 70 per cent working interest.

The offshore block is home to the Kan-1EXP oil and gas discovery, one of Mexico’s largest recent hydrocarbon finds. The discovery was made in 2023 by Wintershall Dea, whose upstream business was later acquired by Harbour Energy in an $11 billion deal.

Harbour Energy estimates that the Kan-1EXP discovery contains up to 500 million barrels of oil equivalent in place, highlighting its significance to Mexico’s offshore oil and gas industry.

The acquisition marks the latest in a series of energy investments by Slim. Since 2023, Grupo Carso has acquired interests in several major Mexican energy assets, including the Zama field and the Pokoch, Ichalkil and Lakach developments, further strengthening its position in the Gulf of Mexico.