Lam Research Sinks 9% as Supply Constraints Cap Outlook; Applied Materials Drops 6%, ASML Holding Falls 4%

A supply warning inside an otherwise record quarter is pulling chip equipment stocks lower, and the company that issued it is taking the worst of the damage. Lam Research (NASDAQ:LRCX | LRCX Price Prediction) stock is down 9% to $236.83 in early trading, a drop that shows how heavily a limited outlook can outweigh a strong earnings report.

Chip stocks are falling broadly after the Lam Research warning, and semiconductors are taking a harder hit than the rest of large-cap tech. The iShares Semiconductor ETF (NASDAQ:SOXX) is down 4%, while the Invesco QQQ Trust (NASDAQ:QQQ) is down 2%, a softer decline than the chip fund’s.

Meanwhile, Applied Materials (NASDAQ:AMAT) stock is down 6% to $385.41, a smaller slide than the one hitting Lam Research shares. ASML Holding (NASDAQ:ASML) stock is down 4% to $1613.97, a far lighter loss than the one in Lam Research stock.

Supply Constraints Cap a Record Quarter

Lam Research reported record fiscal Q1 2027 revenue and adjusted earnings per share (EPS) above analyst estimates on October 21. Sales at Lam Research reached $8.22 billion, and non-GAAP EPS of $2.20 also beat estimates. Chief executive Tim Archer stated, “With AI driving higher semiconductor demand and greater device complexity, our focus on operational execution helped Lam deliver record revenue, profit, and earnings per share in the September quarter.”

CFO Doug Bettinger stated on the conference call that Lam Research’s December-quarter revenue guidance of $8.6 billion, plus or minus $400 million, “would have been a bit higher if not for some near-term supply chain constraints,” which the company is actively managing. Bettinger declined to put a number on the lost revenue, saying only that the guide would have been “a little bit higher.” That outlook also called for non-GAAP EPS of $2.33, plus or minus $0.15, and it outweighed the record quarter for Lam Research stock.

Lam Research Takes the Heaviest Hit in Chip Equipment

Lam Research makes etch and deposition tools, and management has called advanced packaging “a major driver of growth” for the business. Rival Applied Materials sells the widest range of wafer fabrication equipment, while ASML Holding dominates lithography and earns more of its revenue internationally.

Applied Materials and ASML Holding didn’t report results alongside Lam Research, so the gap in declines suggests much of the selling is tied to Lam Research’s own outlook, and for Applied Materials, the bull case is strong AI demand while the bear case is exposure to the same supply limits. ASML Holding faces a similar tension, with strong customer demand but planned supply it has said won’t fully meet it.

A preliminary outlook from Lam Research calls for more than $200 billion of calendar 2027 wafer fab equipment spending, and Bettinger said unconstrained demand “would be higher.” That’s encouraging for the company’s order book, though Bettinger also warned that “things are going to continue to be constrained” next year. China made up 35% of Lam Research’s revenue in the September period, and Bettinger expects a “significantly lower percentage” in the December quarter.

Near-term execution is the swing factor for Lam Research, since demand already exceeds what the industry can ship. Archer compared the current tightness with the COVID-era shortages, stating “this is nothing like that,” and added “we’ll be caught up very shortly.” Any quick catch-up would support Lam Research stock, while a longer squeeze could cap its upside into calendar 2027.

Lam Research’s Supply Bottleneck Faces a December Test

Lam Research must now see whether the supply constraints ease during the December quarter. Bettinger expects any orders that slip out of December to land in the following quarter, stating “we will ship that in the March quarter.” Clean room timing adds a second challenge, since Bettinger sees 10 new Tier 1 fabs coming online over the course of next year.

Archer said the company has “visibility through 2028,” though he wants more time to refine the outlook around clean room schedules and supply constraints. Bettinger said management would invest in vendors if needed. Many are “well capitalized and can manage this on their own from a financial standpoint.” Investors weighing their Lam Research stock exposure should size their positions carefully until the next earnings report shows whether that timing shift holds.

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