The company announced the deal in a regulatory filing on Wednesday but did not disclose the name of the customer or other details, citing a confidentiality agreement.
The contract value represents about 38.8 percent of POSCO Future M's total revenue for the previous year.
The deal comes at a time when the EV industry is experiencing a temporary slowdown in demand, often referred to as the "chasm" in the technology adoption lifecycle. POSCO Future M’s second-quarter sales fell below 1 trillion won for the first time in six quarters.