SK Inc., the holding company for South Korea's SK Group, has agreed to sell its stake in chip materials affiliate SK Siltron to Doosan Group for 2.3 trillion won ($1.6 billion).

The transaction, announced Friday, represents a significant restructuring of SK's industrial portfolio as the conglomerate seeks to streamline operations and focus capital on its high-growth semiconductor memory and battery segments.

The deal transfers ownership of SK Siltron, a key supplier of silicon wafers and other semiconductor materials, to Doosan, which aims to strengthen its position in the advanced manufacturing supply chain.

For SK Group, the sale provides liquidity and reduces exposure to the capital-intensive materials segment, allowing management to prioritize investments in SK hynix, the group's flagship memory chipmaker, and its expanding battery business.

This move aligns with broader trends among Korean chaebols to optimize asset structures amid fluctuating global demand for semiconductors.

While SK hynix has benefited from strong data center demand, the materials segment faces different cyclical pressures.