What Is Driving Micron (MU) Shares Higher? Surprise HBM Update

Micron Technology (NASDAQ: MU) shares are pushing higher again in Thursday’s session, building on Wednesday’s explosive 10% rally that sent the stock to $410.34. Pre-market trading on February 12, 2026 saw shares climb an additional 3.23% to $423.61, as investors continued to digest the surprise announcement from CFO Mark Murphy that the company had already begun shipping its next-generation HBM4 high-bandwidth memory chips – a full quarter ahead of schedule.

The momentum reflects growing confidence in Micron’s position within the AI chip supply chain, with Wall Street analysts and institutional investors alike reassessing the stock’s near-term earnings potential in light of the accelerated product timeline.

CFO Confirms Early HBM4 Production

At the heart of Wednesday’s rally was a pointed clarification from Micron CFO Mark Murphy, who addressed what he described as “inaccurate reporting” surrounding the company’s progress on its HBM4 technology.

Murphy confirmed that Micron has entered high-volume production of HBM4 chips and has already commenced customer shipments, developments the company had not previously signaled for this quarter. The announcement represented a one-quarter acceleration from guidance provided in December, a meaningful beat given how closely investors track product timelines in the competitive memory chip space.

Murphy emphasized that Micron’s HBM4 product delivers performance exceeding 11 gigabits per second, and expressed strong confidence in the product’s quality and reliability. He added that shipment volumes are expected to ramp up further through the current calendar quarter, reinforcing expectations that Micron is now firmly embedded in the AI server supply chain.

The clarification drew immediate praise from analysts, with Lynx Equity Strategies’ KC Rajkumar saying the update should put to rest the doubts that had been circulating about Micron’s HBM4 capabilities.

The broader significance of the announcement lies in how it repositions Micron against its rivals. Prior to Wednesday, analysts had raised concerns that the company was trailing Samsung and SK Hynix in bringing the latest memory technology to market, a gap that threatened to cost Micron critical orders from AI chipmakers like Nvidia.

With HBM4 shipments already underway, those fears have been meaningfully reduced, and investors are now pricing in a stronger revenue trajectory as AI infrastructure buildout continues at pace.

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MU Stock Climbs as AI Demand Outlook Improves

Following Wednesday’s close at $410.34, up $37.09, or +9.94%, Micron shares continued climbing in premarket trading, reaching $423.61 (+3.23%) as of 6:08 AM EST on February 12, 2026. The session’s trading volume hit approximately 48.3 million shares, well above the stock’s average daily volume of around 32.4 million, reflecting the degree to which the HBM4 update moved institutional and retail investors alike.

The day’s range ran from $386.57 to $414.16, with the stock opening at $395.38 against a prior close of $373.25.

From a performance standpoint, Micron has been one of the semiconductor sector’s standout stories. The stock is up more than 43% year-to-date and has delivered a staggering one-year return of approximately 337%, compared to roughly 14% for the S&P 500 over the same period.

The company’s market capitalization now stands at approximately $461.8 billion, with a trailing P/E of 39 and a notably more attractive forward P/E of around 13, suggesting the market sees substantial earnings growth ahead. In Q1 FY26, Micron reported EPS of $4.78 against an estimate of $3.96, and revenue of $13.64 billion.

Analyst sentiment remains firmly bullish. Morgan Stanley raised its price target from $350 to $450 on February 11, maintaining an Overweight rating, while the broader analyst community has issued a Strong Buy consensus supported by 27 Buy ratings, two Holds, and zero Sells.

The average price target across analysts stands at $382.23, though the current price has already surpassed that figure and with Barclays setting a high target of $500, there is room for further upgrades as Micron’s AI memory narrative solidifies.

The CFO’s own characterization of the business being on an “extraordinary trajectory,” combined with demand that remains significantly higher than Micron’s ability to supply, suggests tight and favorable market conditions are likely to persist well beyond 2026.

Disclaimer: The author does not hold or have a position in any securities discussed in the article. All stock prices were quoted at the time of writing.