A European semiconductor company experienced a dramatic stock surge Wednesday, with shares of X-FAB climbing as much as 76% in what analysts describe as a retail investor-driven rally sparked by social media activity.
The remarkable price jump appears linked to a viral post on platform X from an account called Serenity, which promoted X-FAB as an “interesting long idea” connected to photonics and power semiconductors, according to market traders.
“It’s being pushed on X,” explained Stephane Ekolo, an equity strategist with TFS Derivatives in London.
Company representatives from X-FAB were not immediately available to provide commentary on the stock movement.
The Serenity account, which also operates under the handle @aleabitoreddit, has previously influenced major stock movements, including sharp increases in UK computer hardware company Raspberry Pi during February. The account’s following has expanded dramatically from approximately 58,000 to more than 411,000 followers since that time.
Trading data suggests retail investors dominated the activity, with X-FAB becoming one of the most actively traded securities on Germany’s Tradegate platform, ranking second only to U.S. chipmaker Micron Technology and surpassing Germany’s Infineon in volume.
The Paris-listed company’s market capitalization briefly reached approximately 2.06 billion euros ($2.4 billion), representing roughly three times its valuation from early 2026. By 1127 GMT, the stock had settled to a 35% gain after giving back some of its earlier advances.
This surge occurs within a broader semiconductor sector rally driven by expectations that artificial intelligence technology will sustain strong demand for chips.
On the same day, SK Hynix achieved a market value exceeding $1 trillion for the first time, joining fellow memory chip manufacturers Samsung Electronics and Micron in reaching that milestone.
