Lam Research (LRCX) Falls 6% After Q1 Beat, $8.6B Guide

Lam Research shares fell about 6% after hours despite a fiscal Q1 beat and $8.6B Q2 revenue guidance, as investors sold the chip-equipment name over a wide range.

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What Did Lam Research Report for the September Quarter?

Lam reported revenue of $8.22 billion, up 22% from $6.72 billion in the June quarter and up 54% from $5.32 billion a year earlier. GAAP diluted earnings were $2.19 per share, and non-GAAP earnings were $2.20.

Profitability improved. GAAP gross margin was 52.3% and non-GAAP gross margin was 52.4%, compared with 50.6% a year earlier. GAAP operating margin was 40.0%, or 40.2% on a non-GAAP basis.

Operating cash flow was $3.50 billion. The company returned capital through $1.02 billion of share repurchases and $325.4 million of dividends. Deferred revenue stood at $2.66 billion.

Chief Executive Tim Archer attributed the record results to artificial intelligence driving higher semiconductor demand and greater device complexity. Those two forces are lifting spending on the etch and deposition tools Lam supplies to memory and logic chipmakers.

Why Did Lam Research Shares Fall Despite the Beat?

Shares fell because the guidance range was wide and the bar was high, not because the numbers missed. Lam guided December-quarter revenue to $8.60 billion plus or minus $400 million, a span of $8.2 billion to $9.0 billion. The midpoint is above the consensus of about $8.54 billion, but the low end implies a sequential gain of only about 0%.

Earnings guidance followed the same pattern. Diluted EPS is projected at $2.33 plus or minus $0.15, or $2.18 to $2.48. Gross margin is guided to 52.5% plus or minus 1 percentage point, and operating margin to 40.5% plus or minus 1 point. The margin midpoints imply little expansion from the September quarter.

The stock entered the report after a strong run tied to AI infrastructure spending. When expectations are that elevated, a modest beat paired with a broad range can prompt profit-taking. The reaction is consistent with a crowded trade in AI stocks tied to semiconductor capital spending.

What Is the Wafer Fabrication Equipment Outlook?

Lam expects wafer fabrication equipment (WFE) spending in the mid-$150 billion range for calendar 2026 and more than $200 billion in 2027. WFE is the total amount chipmakers spend on the machines that build chips, and it determines the order book for suppliers such as Lam.

The company expects percentage growth in 2027 to be led by DRAM, followed by leading-edge foundry logic and NAND flash. DRAM demand has been boosted by the memory requirements of AI accelerators, which has pushed memory makers to add capacity. A forecast above $200 billion would mark a step-change from 2026 levels and supports the view that the current cycle has room to run.

That multi-year view contrasts with the near-term focus of the after-hours trade. The 2027 projection suggests demand visibility is intact, while the December-quarter range shows how much timing of customer shipments and fab readiness can swing results from one quarter to the next.

Strategic Context

Lam's business is concentrated in etch and deposition, the steps that carve and layer circuits onto silicon. Rising device complexity, including taller NAND stacks, advanced DRAM and gate-all-around transistors, increases the number of such steps per wafer. That raises Lam's content per unit of capacity even when overall wafer volumes grow slowly.

The company also carries balance-sheet flexibility. With $3.50 billion of quarterly operating cash flow, it funded both buybacks and dividends without strain, and it continues to invest in capacity and technology to meet demand.

What Comes Next for Lam Research?

The next test is whether December-quarter revenue lands in the upper half of the $8.2 billion to $9.0 billion range. Results above the $8.60 billion midpoint would reinforce the 2027 spending narrative, while a result near the low end would feed concerns that the AI build-out is lumpy.

Investors will also watch customer capital expenditure plans from memory and foundry producers, along with any change in export-control rules that affect sales to China. Any shift in those inputs would move WFE forecasts and, by extension, equipment suppliers.

Outlook

Lam Research delivered record revenue of $8.22 billion, higher margins and above-consensus guidance, yet shares fell about 6% after hours as the wide Q2 range tempered enthusiasm. The company's forecast of WFE spending above $200 billion in 2027 anchors the longer-term case, while near-term trading is likely to track customer spending signals and the first read on December-quarter shipments.