SK Group Chair's Wafer Stake Valued Near Divorce Settlement Amount

The Transaction

SK Inc. has divested its 70.6 percent controlling stake in SK Siltron to Doosan for approximately 2.3 trillion won ($1.6 billion), according to industry sources following a board approval Friday. The sale removes SK Group's majority control from Korea's only domestic producer of semiconductor wafers, a critical material in chipmaking.

The transaction leaves SK Group Chair Chey Tae-won holding the remaining 29.4 percent of the wafer manufacturer. Based on the deal's valuation metrics, Chey's retained stake is estimated at roughly 958 billion won ($670 million), a figure that sits within striking distance of the 944 billion won divorce settlement he was ordered to pay in a recent court ruling.

Timing and Context

The convergence of these two numbers has drawn attention in Seoul's financial circles, though SK Group has not publicly commented on any connection between the divestiture and Chey's personal financial obligations. The sale represents one of the larger asset reshuffles within South Korea's conglomerate landscape this year, as semiconductor supply chain dynamics continue to shift across Northeast Asia.

SK Siltron manufactures silicon wafers used as substrates for integrated circuits. The company has production facilities in South Korea and overseas operations that supply global chipmakers. Doosan's acquisition positions the industrial conglomerate deeper into the semiconductor materials segment, a sector that has seen sustained demand despite cyclical pressures in end-market chip sales.

Strategic Implications

For SK Group, the exit from wafer manufacturing marks a narrowing of its semiconductor footprint. The conglomerate retains significant exposure to the industry through SK hynix, the world's second-largest memory chipmaker, but the Siltron sale suggests a strategic pivot toward concentrating capital in higher-margin or more strategically aligned businesses.

Doosan's entry into wafer production comes as governments across Asia prioritize supply chain resilience for critical semiconductor materials. South Korea has designated wafer manufacturing as a strategic industry, offering tax incentives and policy support to firms that expand domestic capacity. The acquisition gives Doosan access to established production lines and customer relationships at a time when chipmakers are seeking to diversify their materials sourcing beyond a handful of dominant suppliers.

Chey's retained minority stake in SK Siltron is uncommon in South Korea's chaebol structure, where founding families typically hold equity through the group's central holding company rather than direct positions in operating subsidiaries. The arrangement leaves Chey with a personal investment in a business now controlled by an outside buyer, though the terms of any shareholder agreements or future liquidity options have not been disclosed.

Market Dynamics

The wafer sector has experienced uneven growth over the past two years. While long-term demand is supported by the expansion of AI infrastructure, electric vehicles, and data centers, near-term pricing has faced headwinds from overcapacity in legacy nodes and softness in consumer electronics. SK Siltron's valuation in this transaction will serve as a benchmark for other materials companies considering strategic options.

Doosan has been active in diversifying its revenue base beyond traditional heavy industry. The company has made incremental investments in hydrogen infrastructure, energy storage, and advanced manufacturing. Adding wafer production aligns with its stated goal of participating in high-value segments of the technology supply chain, though integrating a materials business will require operational expertise distinct from Doosan's existing portfolio.

The deal is subject to standard regulatory approvals, including review by South Korea's Fair Trade Commission. Completion is expected in the fourth quarter, at which point Chey's stake will transition to a minority position in a Doosan-controlled entity. Whether he retains the shares long-term or pursues a secondary sale will depend on liquidity needs and Doosan's plans for the business.