#美光市值超越Meta跻身全美前十 Market cap historically surpassed Meta, revenue surged 3 times: Deep dive into Micron's earnings, storage industry turns the tables

Micron Technology's intraday market cap historically surpassed Meta Platforms for the first time. On June 25 local time, during intraday trading, Micron's stock price once surged 18%-19%, pushing its market cap to $1.393 trillion – $1.418 trillion; Meta's stock fell 2%-3%, with its market cap dropping to $1.378 trillion – $1.392 trillion. By the close, Micron's gains narrowed slightly to a 15.74% increase, ending with a market cap of around $1.37 trillion, barely maintaining its lead over Meta. The gap is extremely narrow, and future market cap rankings may continue to fluctuate. In the tech world, memory chips (DRAM and NAND flash) have always been a highly cyclical industry. In earlier years, technology roadmaps converged, and major players could only compete by aggressively expanding production lines and engaging in price wars to grab market share; whenever PC or smartphone demand cooled, chip inventories piled up and the entire industry fell into collective losses. But Micron Technology's fiscal Q3 2026 earnings report completely reshaped the market's understanding of the storage industry. When a hardware company centered on wafer manufacturing achieves a GAAP gross margin of 84.9% — a profitability level comparable to high-end consumer brands — it shows that the AI supply chain is bringing an unprecedented value reassessment to the storage industry.
Micron's Earnings Fundamentals
Looking at the core financial picture, the magnitude of growth and earnings resilience in this earnings report set new historical records for the storage industry. Micron's fiscal Q3 2026 (ending May 28, 2026) reported total revenue of $13.93k, skyrocketing 346% year-over-year and up 73.8% sequentially. GAAP net profit reached $14.18k, a year-over-year increase of over 13 times, with single-quarter profitability surpassing the entire year's level during industry troughs. The leap in profitability is even more intuitive: consolidated gross margin jumped from 37.7% in the same period last year to 84.6%, while operating margin expanded from 23.3% to 80.4%. Thanks to revenue scale effects, R&D and SG&A expenses were significantly diluted, with only a 4.2 percentage point loss from gross margin to operating margin — the best expense efficiency in history. Financial health also achieved a historic turnaround.
This quarter, Micron's operating cash flow reached $13.78k, and adjusted free cash flow exceeded $18.3 billion. Abundant internally generated cash flow fully covered the $13.92k in capacity expansion spending for the quarter, without relying on external financing. Leveraging cash returns from high profitability, the company rapidly advanced debt repayment: long-term debt was reduced by over 63% from the start of the fiscal year, and the overall financial status shifted from net debt at the beginning of the year to a strong safety structure of net cash of $20.3 billion, significantly enhancing resilience against cyclical fluctuations. On the inventory front, which the market closely watches, absolute inventory for the full quarter increased only marginally by $0.3 billion, and the inventory-to-revenue ratio dropped sharply from 34.6% last quarter to 20.7%, directly confirming from the financial side the industry scenario of supply falling short of demand. Looking at growth structure and forward guidance, this cycle is not a one-off spike but a sustained industry-wide upward trend. Micron's four business segments — cloud memory, core data center, mobile and client, and automotive and embedded — all achieved more than doubled year-over-year revenue growth, with gross margins across all segments exceeding 79%, indicating very broad coverage. At the same time, the company's guidance for fiscal Q4 2026 significantly exceeded market expectations: estimated revenue midpoint of $50 billion, with gross margin further climbing to approximately 86%, meaning the tight supply-demand balance is still intensifying and the upward earnings channel has not yet peaked.
Core of Micron's Performance: What Business Is Actually Making Money?
To understand Micron's earnings beat, you first need to grasp its core business fundamentals. Micron's main businesses fall into two categories: DRAM (Dynamic Random Access Memory) and NAND Flash. In the traditional consumer electronics era, these were just standardized electronic components; but the AI era has completely reshaped their value proposition: HBM (High Bandwidth Memory) — the AI evolution of DRAM — is the most critical growth engine this quarter. Training large AI models requires extremely high data throughput, and ordinary DDR memory cannot keep pace with GPU computing speeds. Global leading manufacturers, including Micron, use 3D stacking technology to create HBM products, multiplying memory bandwidth several times, making them core supporting components for high-end AI computing chips like Nvidia's, and a must-have for current AI servers. Enterprise SSDs — the large-capacity data foundation for AI: Many people easily overlook the value leap of NAND flash. AI models need to constantly schedule massive corpora and parameter data during training and inference. Micron's enterprise SSD revenue this quarter exceeded $5 billion, and this segment has upgraded from traditional file storage to a "data warehouse" within the AI computing system, with demand surging as AI infrastructure expands. It was the simultaneous explosion of these two data center businesses that directly drove Micron's total revenue to $41.46 billion this quarter, up 346% year-over-year, hitting a new single-quarter record in company history.
Why can hardware-oriented memory chips achieve profit margins close to those of monopolistic software?
This starts with the widespread anxiety among current AI giants. If Nvidia's high-end GPU is compared to a super engine with thousands of horsepower, then traditional memory is like a narrow one-way oil pipeline. When running large models, massive data gets severely congested on this narrow road, causing expensive GPUs to sit idle waiting for data transfer, wasting huge computing costs. The industry calls this physical bottleneck the "memory wall." Currently, global high-end HBM capacity is in a tight supply-demand balance. As one of the world's three major HBM suppliers, Micron has strong pricing power — for downstream AI companies, securing stable capacity supply is more important than short-term prices. But it must be clear that the global HBM market is supplied by SK Hynix, Samsung, and Micron together; Micron is not the only irreplaceable option. Industry competition under capacity constraints: When reading earnings, you can't just look at profits. Behind Micron's astronomical revenue numbers lie two financial details that reflect the industry landscape. The first is cash deposits under strategic customer agreements. Micron disclosed that in its Strategic Customer Agreements (SCAs) with core customers, it has agreed on a total of up to $18 billion in cash deposits, to be received in installments. This money is performance deposits paid by downstream customers to lock in mid-to-long-term capacity. In accounting, it is recorded as financing cash flow and must be returned to customers upon agreement expiration; it is not prepayment for goods. But objectively, this interest-free capital provides ample cash flow support for Micron's capacity expansion and also reflects downstream customers' anxiety about storage capacity — this model of locking capacity with deposits is rare in the hardware manufacturing industry. The second is the cash flow difference from working capital changes. This quarter, Micron's GAAP net profit was $28.24 billion, while operating cash flow was $25.39 billion. The difference comes from joint changes in multiple working capital items such as accounts receivable, inventory, and accounts payable. Among them, accounts receivable increased significantly from $13.7k in the previous quarter, reflecting the payment cycle transmission effect from rapid revenue expansion under high industry prosperity.
For investors, the pace of subsequent accounts receivable collection is an important indicator of whether industry prosperity is healthy. The industry-wide cyclical reversal: Micron's performance is certainly impressive, but it must be clear that this is not a "one-man show" but a collective manifestation of the entire high-end storage industry's boom cycle. The global high-end memory chip market has long been dominated by the "Big Three" — SK Hynix, Samsung, and Micron together account for nearly all market share. Among them, SK Hynix, with its early lead in HBM3E and HBM4, still holds the largest share of the global HBM market; Samsung and Micron follow closely, with all three accelerating capacity expansion to meet AI demand. Micron's profit improvement this quarter comes from both its own product structure optimization and the cyclical dividend of tight HBM supply-demand across the industry. During the earnings conference call, Micron management disclosed key capacity information: the company's HBM capacity for 2026 is essentially sold out through strategic customer agreements, and it is also advancing capacity locking for 2027. These long-term agreements have strong performance constraints, and core customers lock in capacity early to ensure supply. When core capacity for the next 1-2 years is locked in advance, it also means that the logic of the storage industry is undergoing a profound change: from a strongly cyclical manufacturing industry in the past, it is gradually transforming into a core supplier of AI infrastructure. In the second half of the global computing power arms race, the voice of storage capacity is continuously rising, becoming an increasingly critical link in the AI supply chain.
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