Direct Answer
Lam Research reports revenue across 2 product and service lines in its fiscal 2025 Form 10-K. System is the largest, with $11.5 billion of revenue (62% of the total), followed by Customer Support and Other at $6.9 billion (38%). 7% of revenue came from the United States.
How Does Lam Research Make Money?
System supplies 62% of revenue, so Lam Research's results move mostly with that one business; the others matter more for diversification than for the headline number. Between fiscal 2024 and 2025, System grew fastest (+28.8%) and Customer Support and Other slowest (+16.1%), so the revenue mix tilts toward System while that gap lasts.
| Product or service | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| System | $11.5 billion | $8.9 billion | 62.3% | 28.8% |
| Customer Support and Other | $6.9 billion | $6.0 billion | 37.7% | 16.1% |
Where Does Lam Research's Revenue Come From?
Regions follow the definitions in the filing; most companies assign revenue by customer location.
| Region | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| China | $6.2 billion | $6.3 billion | 33.7% | -1.4% |
| South Korea | $4.1 billion | $2.9 billion | 22.4% | 43.6% |
| Taiwan | $3.4 billion | $1.7 billion | 18.7% | 106.1% |
| Japan | $1.9 billion | $1.5 billion | 10.2% | 28.8% |
| United States | $1.4 billion | $1.1 billion | 7.5% | 24.7% |
| South East Asia | $837 million | $794 million | 4.5% | 5.4% |
| Europe | $563 million | $707 million | 3.1% | -20.4% |
What the Segment Figures Do Not Show
The rows above add up to 100% of Lam Research's reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.
Where These Numbers Come From
Every figure on this page is a value Lam Research reported in the segment note and revenue disclosures of its Form 10-K filed August 11, 2025 (accession 0000707549-25-000075), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.
Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.
Frequently Asked Questions
What are Lam Research's main products and services?
In its fiscal 2025 Form 10-K, Lam Research reports revenue for System and Customer Support and Other.
Which part of Lam Research brings in the most revenue?
System, with $11.5 billion of revenue in fiscal 2025, or 62% of the total.
How much of Lam Research's revenue comes from outside the United States?
93% in fiscal 2025, by the geographic breakdown Lam Research reports in its Form 10-K. Companies assign revenue to regions differently (customer location, shipping address or selling entity), so check the filing's definition before comparing companies.