Micron's revenue increased fourfold as the demand for AI memory drives gross margins over 81 percent.

      Micron's revenue for Q3 reached nearly $42 billion, marking a fourfold increase from just over $9 billion the previous year, largely driven by a surge in demand for AI memory. This figure significantly surpassed Wall Street expectations. The company's results indicate that it is capitalizing on the AI memory boom, reflected in its stock's rise of approximately 700 percent over the past year.

      Adjusted earnings were over $25 per share, surpassing analyst predictions of around $21. GAAP net income reached over $28 billion, or nearly $25 per share, a significant increase from under $2 billion the previous year. Gross margins exceeded 81 percent, up from 69 percent in the prior quarter and 27 percent a year prior.

      The primary highlight is revenue growth, as Micron generated nearly $42 billion, surpassing the consensus estimate of about $36 billion, largely due to soaring demand for high-bandwidth memory (HBM) chips that accompany GPUs in AI accelerators from Nvidia and Google. HBM is currently a crucial component for AI infrastructure's expansion, with Micron being one of only three manufacturers globally able to produce it.

      CEO Sanjay Mehrotra noted that Micron is only able to meet between 50 to 66 percent of the current HBM demand. The company's entire HBM supply for 2026 is already sold out through long-term contracts, and it has secured $22 billion in customer cash deposits from large clients eager to ensure their supply.

      Micron's upcoming HBM4 chips are reportedly ramping up production at twice the speed of the previous HBM3E generation, with HBM4 revenue having surpassed one billion dollars. This technology is vital for the newest accelerators from Nvidia and Google, where memory bandwidth is becoming crucial for determining inference throughput.

      The company's future outlook is likewise ambitious, forecasting Q4 revenue around $50 billion, give or take one billion, exceeding analyst estimates of about $44 billion and far surpassing last year's figure of just over $11 billion. Micron has also raised its full-year capital expenditure forecast to over $25 billion, up from $20 billion, to increase production capabilities for HBM and advanced DRAM.

      Micron’s market capitalization reached one trillion dollars on May 26, becoming the latest memory chip manufacturer to achieve this milestone amid the AI-driven memory supercycle that is transforming valuations in the semiconductor sector. The stock's approximately 700 percent increase over the past year reflects a shift in how the market views memory—not merely as a cyclical commodity but as a critical part of structural AI infrastructure.

      The company projects that the total addressable market for HBM will grow at a compound annual growth rate of around 40 percent through 2028, expanding from approximately $35 billion in 2025 to about $100 billion. Micron intends to return 100 percent of excess free cash flow to shareholders, a plan supported by the cash deposit strategy that mitigates capital risks during expansion.

      However, there are important caveats. Micron is currently the smallest of the three HBM suppliers, behind SK Hynix and Samsung, and has the least share of Nvidia's HBM4 allocations. Additionally, the overall memory market is evolving, with Chinese companies like CXMT making aggressive moves into consumer DRAM segments that the major players have deprioritized in favor of AI chips.

      Memory pricing inherently fluctuates, and the sustainability of the current supercycle hinges on continued capital expenditure from hyperscalers. Should AI infrastructure spending wane or HBM supply align with demand, Micron's reported margins could shrink quickly. The current gross margin of 81 percent is historically exceptional for a memory manufacturer and is influenced as much by supply constraints as by product excellence.

      For now, the metrics are striking, with revenue quadrupling in a year, margins tripling, and guidance surpassing estimates by over $6 billion—outcomes nearly unprecedented for any company, let alone one that faced losses two years ago. Micron's earnings underscore the deepening AI memory shortage and indicate that companies manufacturing the chips for AI accelerators are capitalizing on value at a pace the market is still adjusting to.