Kioxia Reels From $229M Patent Loss as Broader Chip Rout Compounds Pressure
Published on 07/18/2026 at 18:44 | Redaktion boerse-global.de
A US patent verdict and a sector-wide selloff have crushed Kioxia’s share price, wiping out more than half its value from a June peak even as the Japanese memory-chip maker reported a record quarterly profit. The stock closed Friday in Frankfurt at €308.00, marking a 39.36% decline over 30 days and a 50.4% drop from its 52-week high of €621.00 set on June 22. The turbulence reflects a toxic mix of legal liability and mounting anxiety about the trajectory of semiconductor demand.
The patent setback came on July 16 when a federal jury in Waco, Texas, ordered Kioxia to pay Viasat Inc. $229 million for infringing a flash-memory patent covering error-correction technology (US 8,615,700). The damages, characterized as an ongoing royalty, apply only to past violations through March 30, 2026. Kioxia immediately vowed to appeal, calling Viasat’s claims “completely unacceptable.” Legal risk extends beyond this case: Viasat is pursuing similar claims against Western Digital in a separate, still-active proceeding.
That legal blow landed as the broader semiconductor sector was already plunging. Two catalysts converged last week: Taiwan’s TSMC raised its 2026 capital expenditure ceiling to $64 billion, fueling fears of an oversupply glut, while the unveiling of China’s Kimi K3 AI model — a 2.8-trillion-parameter open-source language model — sparked doubts about whether chip valuations had overshot reality. The selling hit Tokyo hard on July 17: Kioxia’s shares collapsed 16.1%, the Nikkei 225 shed 4.03%, Taiwan’s semiconductor index tumbled 6.47%, and SK Hynix’s US depositary receipts cratered 13.69%. The Philadelphia Semiconductor Index fell into bear-market territory, more than 20% below its June high.
Should investors sell immediately? Or is it worth buying Kioxia?
Market observers note that Kioxia’s selloff is largely sentiment-driven rather than company-specific. The current price of €308.00 sits well below the 50-day moving average of €405.69, while the relative strength index at 39.3 suggests oversold conditions are approaching but not yet extreme. Annualized 30-day volatility has spiked to nearly 170%, underscoring the ferocity of the moves. Adding to the pressure: Bain Capital is reported to have sold its entire stake in Kioxia, removing a key long-term shareholder.
Yet the company’s underlying business continues to surge. For the first quarter of fiscal 2026, Kioxia posted revenue of ¥1,002,852 million and net profit of ¥407.73 billion — a dramatic swing from the year-ago quarter, when revenue was only ¥347.09 billion and net profit ¥20.27 billion. The AI-driven boom in memory chips has supercharged orders, pushing Kioxia’s stock up roughly 600% in 2026 before the recent rout. At its peak, it was Japan’s largest company by market capitalization; it has now slipped to fourth place.
Nomura is standing by its Buy rating with a price target of ¥126,000, while the broader analyst consensus sits at a “Moderate Buy” with an average target of ¥106,857.14. The next major test comes on July 31, when Kioxia releases its full quarterly results after the Tokyo market close. Investors will be watching for any sign that the chip-demand cycle has peaked, as well as for updates on the Viasat appeal and on renewed merger talks with Western Digital, which are said to be at an early stage and could involve a stock-based transaction or a spin-off.
With the stock trading 50.4% below its peak and just above the 100-day moving average of €278.41, the earnings report could determine whether Kioxia stabilizes or slides further toward the January low of roughly €70.50. The legal overhang and sector-wide jitters mean the volatility is unlikely to dissipate soon.
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