Lam Research grew FY2026 revenue 26.0% to $23.23B and diluted EPS 38.8% to $5.76 on a sharp shift toward foundry customers, but operating cash flow fell 5.1% as receivables rose 58% and customer down payments shrank.
Revenue
$23.2B
+26.0% YoY
Net income
$7.3B
+35.6% YoY
Diluted EPS
$5.76
+38.8% YoY
Operating margin
35.3%
Foundry spending, not memory, drove a 26% revenue year — and margins widened on customer mix
Lam Research builds the machines that chipmakers use to carve and coat the layers of a silicon wafer — its three core processes are deposition (adding ultra-thin material layers), etch (selectively removing material to form the circuit pattern), and clean. It sells to a handful of very large customers, so its results track those customers' factory-building budgets rather than consumer demand directly.
Fiscal 2026 (the 52 weeks ended June 28, 2026) was a step-change year. Revenue rose 26.0% to $23.23 billion, and because costs grew more slowly, operating income rose 39.0% and diluted earnings per share rose 38.8% to $5.76. Management attributes the revenue increase to "strong customer demand for semiconductor equipment systems, particularly from customers within the foundry market segment, as well as customer support-related revenues."
The important nuance is which customers grew. Foundries — contract manufacturers such as TSMC that build chips designed by other companies — went from 45% of equipment and upgrade revenue to 54%, a 900 basis point (9 percentage point) shift in one year. Memory fell from 42% to 39%, and logic/IDM (companies that design and manufacture their own chips) fell from 13% to 7%. Lam says the foundry gain came from "mature node spending as well as investments in leading-edge equipment," and that the memory decline was "primarily due to timing of customer investments" rather than lost share.
Metric
FY2026 (ended 6/28/26)
FY2025 (ended 6/29/25)
YoY Change
Revenue
$23,232.7M
$18,435.6M
+26.0%
Gross margin (dollars)
$11,725.3M
$8,979.1M
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All figures from the FY2026 Form 10-K. Basis points ("bps") are hundredths of a percentage point: 180 bps = 1.8 percentage points.
Where the margin expansion actually came from
Operating margin — the share of revenue left after both production costs and running the business, before interest and tax — improved by roughly 330 basis points. That came from two roughly comparable sources, and only one of them is a pricing or product story.
About 180 basis points came from gross margin, which Lam says rose "largely due to favorable customer mix, partially offset by aluminum and steel tariff-related spend." Customer mix means the revenue skewed toward higher-margin customers and configurations, not that Lam raised prices or cut unit costs. Mix is real profit, but it can reverse when the customer roster shifts back — this is the line item most likely to give ground if memory customers return in force at their usual pricing.
The remaining roughly 150 basis points came from operating expenses growing (+14.5%) far slower than revenue (+26.0%), the classic effect of fixed-cost leverage in an up-cycle. R&D rose 13.3% to $2.38 billion but fell from 11.4% to 10.2% of revenue, driven by $131.4 million of employee costs from higher headcount and $69.8 million more in engineering supplies. SG&A rose 17.1% to $1.15 billion on $180.0 million of additional employee-related costs. Neither line was cut — Lam ended the year with roughly 23,300 full-time employees, over 26% of them in R&D. The ratios improved because revenue outran spending, which is exactly what reverses if revenue flattens.
One item pushed the other way: the effective tax rate rose from 10.1% to 12.1%. That is mostly a prior-year comparison artifact — FY2025 benefited from the one-time recognition of previously unrecognized tax benefits when statutes of limitation lapsed, which is not repeatable. The OECD global minimum tax became fully effective for Lam this year, and the U.S. One Big Beautiful Bill Act was enacted in the period; Lam assessed both as not material. Net income still grew 35.6% despite absorbing $397 million more tax expense.
EPS grew faster than net income (38.8% vs 35.6%) because the diluted share count fell 2.3%, on $3.85 billion of stock repurchases. Roughly three of the 38.8 percentage points of EPS growth are buyback arithmetic rather than business performance.
Takeaway: The income statement had an excellent year, but the cash statement did not follow it — operating cash flow fell 5.1% to $5.86 billion even as net income rose 35.6%, because accounts receivable ballooned $1.96 billion and customer down payments drained the deferred revenue balance. Profit that is sitting in receivables rather than in the bank is the single thing to watch in FY2027.
The cash-flow divergence, and why it matters
Net income rose $1.91 billion; cash generated by operations fell $315.6 million, to $5.86 billion. The gap is working capital. Changes in operating assets and liabilities consumed $1.91 billion of cash in FY2026 after providing $441.8 million in FY2025 — a $2.36 billion swing in one year.
The dominant driver is accounts receivable (money billed to customers but not yet collected), which rose 58.1% to $5.34 billion against revenue growth of only 26.0%. Translated into days, that is roughly 84 days of sales outstanding versus about 67 a year earlier — Lam is waiting about 17 days longer to get paid. Nothing in the filing suggests a credit problem: the allowance for doubtful accounts is $8.1 million on $5.34 billion of receivables and is described as not material. The more likely explanations are shipment timing weighted to the back of the year and a shift toward customers on longer payment terms. But receivable concentration did increase alongside it: at year-end, five customers accounted for 20%, 16%, 15%, 11% and 10% of receivables (72% combined), versus three customers at 19%, 15% and 12% a year earlier.
Second, deferred gross profit fell $286.4 million, after rising $1.15 billion in FY2025. The related balance-sheet deferred revenue account — cash and billings collected before Lam has recognized the revenue — fell to $2.43 billion from $2.68 billion, "primarily due a decrease in customer down payments, partially offset by an increase in earned system credits." Down payments are a soft leading indicator for equipment makers: customers put money down ahead of tool shipments, so a falling balance means the prepaid pipeline entering FY2027 is thinner than the one that entered FY2026. It is not a backlog figure and should not be read as one, but the direction is the opposite of the revenue line.
One genuinely clean signal on the other side: inventories were essentially flat at $4.28 billion, down 0.7%, while revenue grew 26%. Lam turned its stock materially faster rather than building it ahead of demand — and did not stuff the channel to make the year.
Capital returns exceeded free cash flow. Operating cash of $5.86 billion less $966.4 million of capital expenditure leaves roughly $4.89 billion of free cash flow, against $3.85 billion of buybacks and $1.27 billion of dividends — $5.12 billion returned. Adding $755.4 million of debt repayment (the $750 million 2026 Senior Notes matured in March 2026 and were settled from cash), gross cash fell to $5.60 billion from $6.41 billion. Lam also raised its commercial paper capacity from $1.50 billion to $2.00 billion in March 2026, with nothing drawn at year-end. This is a deliberate, well-covered drawdown, not stress — but at this pace of repurchase, buybacks are being funded partly from the balance sheet, not solely from the year's cash generation.
Geography: Taiwan is the swing factor, China is the concentration risk
Non-U.S. sales were about 93% of total revenue, unchanged for three straight years. Revenue is reported by where the customer's facility sits, not where the chips are sold.
Region
FY2026
FY2025
YoY Change
FY2026 share
China
$7,859.8M
$6,205.1M
+26.7%
34%
Taiwan
$5,222.9M
$3,445.2M
+51.6%
22%
Korea
$4,505.3M
$4,127.8M
+9.1%
19%
Japan
$2,171.1M
$1,880.9M
+15.4%
9%
United States
$1,528.9M
$1,376.9M
+11.0%
7%
Southeast Asia
$1,245.9M
$837.2M
+48.8%
6%
Europe
$698.7M
$562.6M
+24.2%
3%
Taiwan grew fastest in absolute dollars (+$1.78 billion, +51.6%) and is the clearest read-through of the foundry mix shift. Korea, the memory-heavy region, grew only 9.1% and slipped from 22% to 19% of revenue — the geographic mirror of memory falling from 42% to 39% of the end-market mix. China grew 26.7%, exactly in line with the company, holding a flat 34% share; that concentration remains the single largest policy-exposed line in the business, and Lam explicitly names trade restrictions and tariffs among the factors that "have had, and in the future may have, a negative impact on our revenue and operating margin."
Customer concentration broadened in a useful way: in FY2026 four customers each exceeded 10% of revenue, at approximately 16%, 15%, 12% and 12% (about 55% combined), versus only two customers above 10% in FY2025 (17% and 15%). More large customers at similar weights is less fragile than the same revenue resting on two.
Forward read
The 10-K does not contain quarterly guidance — Lam issues that in its earnings release, not in the annual report — so the forward-looking content here is directional. Management's own statement: wafer fabrication equipment investments "were strong in the 2025 calendar year, and have continued to grow in 2026 with the AI market driving higher semiconductor industry spending across both the memory and non-memory market segments." The qualifier immediately follows it: short-term volatility from trade restrictions and tariffs may hurt revenue and operating margin.
Our read: the FY2026 revenue and margin performance is real and cleanly earned — there were no restructuring charges in FY2026 or FY2025 to distort the comparison, inventories did not build, and the margin gain is split roughly evenly between mix and genuine operating leverage. Three things temper it.
First, the composition of growth is narrow. Foundry supplied essentially all of the mix shift, and roughly $1.78 billion of the $4.80 billion revenue increase came from a single region, Taiwan. A year this concentrated is harder to repeat than a broad-based one.
Second, the forward indicators inside the filing point mildly the other way from the income statement: deferred revenue down 9.3% on lower customer down payments, and an extra 17 days of receivables. Neither is alarming on its own, but both mean FY2027 starts with a less pre-funded order book and more cash tied up in customers.
Third, memory is the call. It fell to 39% of mix on "timing of customer investments," and Lam expects AI to drive spending across both memory and non-memory segments. If memory investment returns in FY2027, revenue growth can stay strong — but memory is historically the more price-competitive end of Lam's business, so a memory-led year would likely come with less of the "favorable customer mix" that delivered 180 of this year's 330 basis points of margin gain. The most probable FY2027 shape is continued revenue growth with flatter margins, and the deferred revenue balance is the cheapest early tell on whether the top line holds.