Lam Research Revenue Jumped 54%. The Stock Fell 12%. Here Is Why
Record results and a sharp sell-off at Lam Research show a paradox of growth investing. The key question is not how fast a company grows, but how much investors paid for that growth.
The numbers were close to perfect
Lam Research, the US semiconductor equipment maker, reported results on Oct. 21 that looked strong by almost any measure.
Revenue for the quarter ended Sept. 27, 2026, was $821.942 million...
Correction, stated plainly: revenue was $8,219.42 million, or about $8.22 billion. That was up 54.4% from a year earlier and 22.3% from the prior quarter.
GAAP gross margin was 52.3% and GAAP operating margin was 40.0%. Of every $100 in revenue, the company kept $40 as operating profit. That is a very high level of profitability for a chip equipment company.
Yet on Oct. 22 the stock fell from $260.81 to $230.15. The one-day decline was 11.76%.
Lam Research: results vs. stock reaction
| Item | Figure |
|---|---|
| Quarterly revenue growth, YoY | +54.4% ($8.22 billion) |
| Stock move on Oct. 22 | -11.76% (close at $230.15) |
| GAAP gross margin | 52.3% |
| GAAP operating margin | 40.0% |
| GAAP diluted EPS | $2.19 |
| Non-GAAP diluted EPS | $2.20 |
| Next-quarter revenue guidance | $8.6 billion, plus or minus $400 million |
Fiscal 2027 first-quarter results. Source: Lam Research.
The market was disappointed by the future, not the past
The key is the gap between expectations and results.
Consensus called for revenue of about $8.14 billion and non-GAAP EPS of $2.18. Actual results beat both, but the EPS beat was only about 0.9%.
Next-quarter revenue guidance of $8.6 billion was almost identical to the consensus of $8.57 billion. Management also said that guidance would have been higher without supply chain constraints. It expects China's share of revenue to fall considerably next quarter.
China accounted for 35% of September-quarter revenue, above Korea at 20% and Taiwan at 18%. These figures are by customer location, not by where chips are ultimately consumed.
A broader worry about the scale and returns of AI spending added to the pressure. The Philadelphia Semiconductor Index fell about 6.7% the same day. The problem was not Lam's alone.
Strong chip sales do not guarantee strong equipment sales
Lam sells the tools that make chips, such as etch and deposition equipment, not the chips themselves.
That distinction matters.
When demand for AI chips rises, manufacturers such as Samsung, SK hynix and TSMC may buy equipment to expand capacity. But if they already have enough capacity, chip sales can grow while new equipment orders shrink.
An equipment maker's revenue therefore depends less on current chip sales than on customers' future capital spending plans.
Lam gave a preliminary forecast that global wafer fab equipment (WFE) spending will exceed $200 billion in 2027, up sharply from the mid-$150 billion range in 2026. This is the company's outlook, not confirmed customer orders.
What happens when you buy a good company at a high price?
A stock price reflects more than current earnings. It also reflects how much investors are willing to pay for future profit.
Suppose a company earns $10 per share and you buy at 40 times earnings, or $400.
A year later, EPS grows 50% to $15. But if the market's multiple falls to 25 times, the stock is worth $375.
| Start | One year later | |
|---|---|---|
| Price | $400 (EPS $10 x 40) | $375 (EPS $15 x 25) |
EPS growth is +50%. The stock return is -6.25%.
Hypothetical case, excluding dividends and trading costs. It does not describe Lam Research's actual P/E change.
Earnings growth and changes in the valuation multiple can move in opposite directions.
Four things to watch
- Whether Lam meets its quarterly guidance. If supply chain bottlenecks ease, revenue could come in above the current outlook.
- China's share of revenue and absolute revenue. It matters whether a falling share reflects growth elsewhere or a shrinking China business.
- Global WFE spending. Watch whether the company's forecast of more than $200 billion in 2027 turns into actual customer investment.
- Operating margin and valuation. Check whether the 40% operating margin holds, and what P/E the stock carries relative to future EPS growth.
Owning a good company is one thing. Investing at a good price is another. Lam Research's latest results put numbers on that difference.
Insight Times Editorial Desk
