SK Hynix’s Executive Wealth Shift Signals Changing of the Guard in Korean Chip Sector

SK Hynix president Kwak Noh-jung tops non-owner managers in stock value, as the firm's forward P/E edges past Samsung's, reflecting a historic shift in South Korea's semiconductor hierarchy.

The semiconductor hierarchy in South Korea is being rewritten not only in valuation multiples but in the personal fortunes of the executives who run the companies. SK Hynix’s president Kwak Noh-jung has amassed the most valuable stock holding among all non-owner managers across both SK Hynix and Samsung Electronics, a development that would have been unthinkable a decade ago.

According to the Korea CXO Institute, Kwak now holds 14,312 shares of SK Hynix, valued at roughly 28.3 billion won based on Thursday’s closing price of 1,976,000 won. That represents a staggering 861% increase in just six months. He leapfrogged Samsung president Roh Tae-moon to claim the top spot. Three other executives also crossed the 10 billion won threshold: Samsung’s Park Hak-kyu at 17.1 billion won, SK Hynix’s Ahn Hyun at 16.4 billion won, and SK Hynix’s Cha Sun-yong at 13.5 billion won. Cha’s relative gain was the most dramatic — his holdings swelled by 1,525% in half a year.

Oh Il-sun, director of the Korea CXO Institute, put the shift into historical perspective: “In surveys from 2015 and 2019, the gap with Samsung was so wide that not a single SK Hynix manager crossed the billion won mark. A decade later, this is a symbolic turning point.”

The wealth reshuffling mirrors a broader reassessment taking place in the market. For the first time, SK Hynix’s forward price-to-earnings ratio for 2026, at 6.79, has edged past Samsung’s 6.77, according to FnGuide. Just three months ago, Samsung enjoyed a comfortable lead of more than 2.8 points — 8.08 versus 5.28. That valuation gap has now evaporated.

Investors who once bought SK Hynix as the cheaper alternative to Samsung are confronting a new reality: the discount has disappeared. The stock has surged roughly 191% since the start of the year, touching a 52-week high of 1,976,000 won before pulling back slightly on Thursday, while Samsung shares gained. The pullback was modest — the stock closed at 1,970,000 won, down 0.30% — but the pause is hardly surprising after such an explosive rally. Over the past seven days SK Hynix is still up 19.11%, and over 30 days the gain stands at 78.60%.

The ramp has also reshaped the Korean benchmark. Together, Samsung Electronics and SK Hynix now account for 51.5% of the KOSPI200 index, up from 38.7% at the start of the year — a 12.8 percentage point gain that underscores how heavily two semiconductor stocks now dominate the market.

Supply tightness is the engine driving the re-rating. SK Hynix has stated that its DRAM, NAND, and HBM products are completely sold out, leaving the company unable to fulfill all customer orders. Goldman Sachs has raised its estimate for the DRAM supply gap from 3.3% to 4.9%, which would be the tightest market in 15 years. Analysts are increasingly separating standard DRAM from high-margin HBM, a split that benefits SK Hynix given its strong position in AI memory.

Rok-ho Kim at Hana Securities expects supply-demand dynamics in the memory market to tighten further in the second half of 2026, driven by AI servers and rising demand for high-performance memory. UBS raised its price target in May from 1.55 million won to 1.7 million won, citing a memory super-cycle that in both duration and profitability has already surpassed previous cycles. SK Securities notes that even after the rally, the forward P/E on a 12-month basis is only around 5.2.

The largest risk to this narrative remains Samsung. Its HBM4 yield is currently below 60%, while SK Hynix has already achieved 80% on its 1c DRAM. If Samsung manages to mass-produce HBM4 in the second half of 2026, SK Hynix’s market share could drop to between 50% and 60%, putting pressure on the valuation premium the market currently awards it. New capacity at Cheongju and Yongin is not expected until mid-2027, leaving the near-term outlook squarely dependent on HBM4.

Labor unrest adds another layer to Samsung’s challenges. Failed mediation talks have raised fears of an 18-day strike that could disrupt customer relationships and supply chains. JPMorgan estimates that higher wages would hit operating profit by 7% to 12%.

The convergence of fortune — both for executives and for the companies they manage — signals that the old pecking order in Korea’s chip sector has shifted decisively. Whether it holds depends on how quickly the challenger responds.