Micron, Intel, and AMD added a combined $2 trillion in market capitalization during the second quarter of 2026, as investors rotated from AI hyperscalers into semiconductor suppliers seen as direct beneficiaries of data center buildouts.
Chipmakers outside of Nvidia posted historic gains in the second quarter of 2026, with Micron Technology, Intel, and Advanced Micro Devices together adding roughly $2 trillion in combined market capitalization as investors broadened their artificial intelligence bets beyond the dominant GPU maker.
Micron led the three companies with a gain of more than 240% during the quarter, adding approximately $920 billion in market cap. Intel surged 216%, adding $480 billion, while AMD climbed 186%, contributing $615 billion. The three are now ranked the 10th, 11th, and 12th most valuable U.S. technology companies.
"The rotation out of AI hyperscalers into AI enablers has shifted investors' euphoria into semis, driving spectacular rallies," Barclays analyst Anshul Gupta wrote in a note published Tuesday.
Nvidia, which remains the largest U.S. company by market cap and continues to generate substantial revenue growth, gained only 15% in the same period — a comparatively modest figure that underscores how the quarter's momentum shifted toward companies that supply components complementary to Nvidia's graphics processors.
Nvidia's major cloud customers posted mixed results. Alphabet gained 24% for the best performance in the hyperscaler group, while Meta fell nearly 2% for the worst. Amazon and Microsoft showed results in between those two extremes.
Micron's quarter was anchored by strong underlying fundamentals. The company reported last week that revenue in its most recent quarter more than quadrupled, driven by skyrocketing memory prices from AI chipmakers. Its gross margin jumped to 84.9% in the third quarter from 39% a year earlier.
Intel, meanwhile, is constructing U.S. chip manufacturing facilities while simultaneously benefiting from renewed demand for central processing units as more AI workloads move to consumer and enterprise devices. AMD, which competes with Intel in CPUs and trails Nvidia in graphics processing units, rode similar tailwinds.
The broader AI infrastructure supply chain also posted sharp gains. Marvell, which manufactures networking equipment, climbed roughly 200% during the quarter. Arm, which licenses chip architecture to other semiconductor designers, rose 134%. The VanEck Semiconductor ETF gained 71% in the period — its best quarterly performance since the fund began trading in 2000.
Analysts had previously described the emerging market dynamics as a potential "changing of the guard in AI," reflecting a thesis that a large-scale expansion in data center capital expenditures would benefit a wider range of semiconductor suppliers, not solely the companies directly producing AI accelerators.
Whether the rally reflects durable earnings power or an overextension of investor enthusiasm is now a point of open debate. Michael Burry, the investor who predicted the 2008 subprime mortgage crisis, said Tuesday he had taken new short positions in Nvidia, Applied Materials, Tesla, and the iShares Semiconductor ETF, citing the Philadelphia Semiconductor Index trading approximately 65% above its 200-day moving average — a level he said was last reached during the dot-com bubble in 2000.
With the second half of 2026 now underway, earnings reports from Micron, Intel, and AMD in the coming months will offer the clearest test of whether the sector's valuation expansion is supported by the revenue growth investors have priced in.
Jay Goldberg is a staff writer at TechEchelon covering technology, markets, and policy. He files the breaking news and deal coverage that move the publication's core desks.
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