Lam Research (LRCX) falls 12% after supply warning as chip stocks suffer worst day since June

Lam Research logo with the text: Falls 12% after a supply warning

Key points

  • Lam falls nearly 12% despite record sales
  • Supply shortages push some shipments into March
  • Lam expects Chinese chipmakers to buy less
  • Chip index has its worst day since June

Lam Research (LRCX) shares fell 11.8% on October 22 after the chip-equipment maker reported record quarterly sales but said supply shortages would push some planned December shipments into the March quarter. The PHLX Semiconductor Index fell 6.7%, its worst day since June 23.

Lam's revenue rose 22% from the previous quarter to a record $8.22 billion in the quarter ended September 27. The company forecast $8.60 billion, plus or minus $400 million, for the December quarter. Chief financial officer Doug Bettinger said on the earnings call that the forecast "would have been a bit higher if not for some near-term supply chain constraints that we are actively managing."

Lam says delayed shipments will move into March

An analyst asked Bettinger on the call whether the constraints were costing Lam $300 million to $400 million in December revenue. Bettinger said he wouldn't put a number on it. Equipment Lam would have shipped in December will ship in the March quarter instead, he said.

Asked about the bottlenecks, Bettinger said, "given how strong things have been, we're seeing a little bit of tightness." He didn't say which parts were in short supply.

China's share of Lam's sales is expected to fall

China made up 35% of Lam's revenue in the September quarter, up from 26% in the June quarter. Bettinger said that share will be "meaningfully down" in the December quarter, mostly because Chinese chipmakers are expected to buy less. He expects spending by the global chipmakers operating in China to remain "reasonably strong."

Equipment makers led the chip selloff

Other chip-equipment makers fell with Lam. KLA (KLAC) dropped 9.5%, and Applied Materials (AMAT) lost 8.2%. The losses spread to chipmakers.

Stock or indexOctober 22 closeChange
Lam Research (LRCX)$230.15-11.8%
KLA (KLAC)$147.83-9.5%
Marvell (MRVL)$223.47-8.7%
Applied Materials (AMAT)$375.58-8.2%
Intel (INTC)$85.49-8.0%
ASML (ASML)$1,560.54-6.9%
Micron (MU)$856.49-6.3%
Nvidia (NVDA)$212.21-4.4%
PHLX Semiconductor Index10,731.98-6.7%
Nasdaq Composite26,008.86-2.6%

The Nasdaq fell 2.6%, and the S&P 500 lost 1.2%. Meta Platforms (META) fell 7.0% the day after its third-quarter report, which raised its expense forecast. Chip stocks had already fallen for eight straight sessions through October 16, the index's longest losing streak since 2008.

Lam still expects equipment spending to grow in 2027

Lam expects global spending on wafer fabrication equipment, the machines that make chips, in the mid-$150 billion range this year. Its preliminary outlook for 2027 is more than $200 billion. Chief executive Tim Archer said on the call that "clean room space availability and supply chain constraints for certain components" will keep limiting how fast chipmakers and equipment companies can meet demand next year.

Our guide to semiconductor equipment stocks compares Lam with Applied Materials, KLA, and ASML.

Frequently asked questions

Why did Lam Research stock fall on October 22, 2026?

Lam Research (LRCX) fell 11.8% to $230.15 a day after reporting record revenue of $8.22 billion. Chief financial officer Doug Bettinger said the company's December-quarter forecast of $8.60 billion, plus or minus $400 million, would have been a bit higher without near-term supply chain constraints.

How much did chip stocks fall on October 22, 2026?

The PHLX Semiconductor Index fell 6.7% to 10,731.98 on October 22, 2026, its worst day since June 23. KLA fell 9.5%, Applied Materials 8.2%, Intel 8.0%, and Nvidia 4.4%, while the Nasdaq Composite lost 2.6%.

What did Lam Research say about China?

China made up 35% of Lam Research's revenue in the September 2026 quarter, up from 26% in the June quarter. Chief financial officer Doug Bettinger said China's share will be meaningfully lower in the December quarter, mainly because Chinese chipmakers are expected to buy less.

What does Lam Research expect for chip equipment spending in 2027?

Lam Research expects global wafer fabrication equipment spending in the mid-$150 billion range in 2026. Its preliminary outlook for 2027 is more than $200 billion. CEO Tim Archer said clean room space and supply constraints for certain components will keep limiting how fast the industry can meet demand.

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Dennis Singleton
Dennis Singleton

Dennis Singleton was born in Australia and later moved to the United States. He has spent years following the markets, but what keeps his attention is how AI is built. He writes about the companies behind the technology, from semiconductor designers and advanced packaging to photonics, memory, networking, and the hardware powering modern AI. His approach starts with filings, earnings, and industry research, then translates the important details into clear, straightforward analysis without unnecessary hype.