KLA Corporation (KLAC): Q4 2026 results, my verdict

2026-07-29 · By Lubin Danilo, founder of Lubin Investment

KLAC: see the full analysis on Lubin Investment

KLA Corporation reported on July 28, 2026 record quarterly revenue of $3.66 billion and raised its 2026 chip-manufacturing-equipment outlook. My quality screen validates 9 out of 10 criteria, a near-perfect score. Yet the stock fell after the announcement. Here is what I can confidently say, and what I'd rather not quantify this quarter.

What just happened: a record driven by AI infrastructure demand

KLA Corporation reported after market close on July 28, 2026 its fiscal fourth-quarter 2026 results (period ended June 30, 2026): record revenue of $3.66 billion, up 7% sequentially and 15% year over year, GAAP earnings per share of $1.04, and a gross margin of 62.4%, both at the high end of management's guidance. For the full fiscal year 2026, revenue reached $13.58 billion. CEO Rick Wallace summed up the quarter: 'KLA's June quarter results reinforce that the trends driving our growth are strengthening, and we see momentum across our business accelerating in the second half of calendar 2026 and continuing through 2027.'

KLA makes the machines that inspect the quality of computer chips before mass production: a critical niche business, since a single undetected error in the manufacturing process can ruin an entire batch of expensive-to-produce semiconductors. This quarter, Wallace highlighted one segment in particular: quality-control systems for advanced packaging (the technique of stacking and connecting multiple chips together, essential for the most powerful AI processors). KLA now expects roughly $1.1 billion in revenue from this segment alone in 2026, growth of more than 70% year over year, up from a prior guide of just 50% growth and nearly double the expected rate for the overall advanced-packaging market. Management also raised its 2026 total wafer fab equipment (WFE) market outlook to a bit above $150 billion.

Why my quality screen validates 9 out of 10 criteria

I already dedicated a full fundamental analysis to KLA on July 7, 2026, where the company already validated 9 out of 10 criteria. Three weeks later, that score has not moved, and the results just released confirm each of the strengths I detailed there: a 35.7% net margin (more than a third of revenue ends up as net profit), 11.2%/year sales growth on average over five years that is accelerating with the AI supercycle, 15.0%/year free cash flow per share growth, a share count declining 2.6%/year, and a Cash ROCE of 37.9%, a very high level for an industrial equipment maker.

The one criterion that clearly fails illustrates a mechanic specific to the semiconductor-equipment business: the net cash collection cycle reaches 275 days, with inventory turnover alone at 248 days. In practice, KLA builds complex, custom-made machines, often designed and assembled over several months before being shipped and billed: inventory ties up an enormous amount of cash throughout this production cycle, far more than in most industries. This is a structural constraint of the business, not an isolated warning sign, and it has always coexisted with KLA's high margins and profitability.

The price: why I'd rather not put a number on it this quarter

This is where I choose honesty over false precision. My automated valuation model produced, for KLA this quarter, a free cash flow per share figure that does not reconcile properly with the free cash flow margin and revenue I just cited above: the two internal data sources tell different stories, a gap I did not encounter to this degree in the other results analyzed today (Microsoft, Meta, Qualcomm, Procter & Gamble). Rather than publishing a P/FCF or buy price I cannot confidently verify, I would rather flag it as a data anomaly to be fixed before making a numbers-backed call, exactly as I have done in the past for other tickers where a currency or market-cap bug distorted my ratios.

What I can say without relying on suspect data, however, is the market's reaction: the stock fell after the release, despite a quarter that beat targets across the board and a raised advanced-packaging outlook. That is a signal in itself: when a company beats its own targets and its stock still falls, it often means the market was expecting even more, or doubts the durability of the AI supercycle beyond the horizon already covered by guidance. In my July 7 analysis, I already noted that KLA traded noticeably cheaper than peers like Applied Materials or Lam Research for better financial discipline: this quarter changes nothing about that qualitative diagnosis, even if I cannot update the precise figure today.

What could derail the thesis

The most structural risk remains the cyclicality of the semiconductor-equipment sector: spending by foundries and memory makers follows pronounced cycles, and a supercycle driven by AI today can turn into overcapacity tomorrow if AI chip demand slows. The market, by pushing the stock down despite a record quarter, may already be signaling this caution. Demand concentration among a small number of very large customers (the world's leading foundries) is an additional risk to watch.

KLA Corporation reported on July 28, 2026 record quarterly revenue of $3.66B (+15% year over year), a 62.4% gross margin, and raised its advanced-packaging revenue outlook (+70% in 2026, up from a prior +50% guide).
My quality screen validates 9 out of 10 criteria (unchanged from my July 7 analysis), driven by a 35.7% net margin, a 37.9% Cash ROCE, and 15.0%/year FCF-per-share growth. Only weak point: a very long inventory cycle (248 days), specific to custom equipment manufacturing.
Data anomaly detected this quarter in my automated P/FCF calculation for KLA: I would rather not publish an unverified figure than invent a precision I do not have. The stock fell despite results that beat targets, a market caution signal worth noting.
The real risk to watch: cyclicality in the semiconductor-equipment sector, where an AI supercycle can turn into overcapacity. This is not investment advice, do your own research.

FAQ

Why did KLA's stock fall despite record results?

Because beating your own targets is not always enough to satisfy a market that expected even more, or that questions the durability of the AI-driven supercycle beyond the horizon already covered by management's guidance. This is a caution signal worth noting, regardless of the quarter's actual quality.

Why is KLA's inventory turnover so long (248 days)?

Because KLA builds complex, custom-made quality-control machines, designed and assembled over several months before being shipped and billed. Inventory ties up a lot of cash during this production cycle, a structural constraint of the equipment business rather than a warning sign.

Why don't you give a precise P/FCF for KLA this quarter?

Because my automated valuation model produced a free cash flow per share figure that does not reconcile properly with other available data (FCF margin, revenue). I would rather flag this anomaly and wait for reliable data than publish a figure I cannot confidently verify.

Should you buy KLA stock after these results?

The quality score stays near-perfect (9 out of 10), confirming my July 7 analysis. However, I do not have a reliable valuation figure to give you this quarter: the market's caution despite record results deserves further digging before making a call. This is not personalized investment advice, do your own research.

About the author

Written by Lubin Danilo, founder of Lubin Investment. A self-taught individual investor, I find fundamental analysis fascinating, and it has delivered excellent results. For three years now, my performance has beaten the S&P 500. But analyzing every stock took too much time: sites with incomplete data, calculation methods and criteria never aligned with mine. And spotting the best stocks was just as time-consuming, even with my own well-defined checklist. So I put my software development background to work to build this software, base my investment strategy on its results, and share it with people who share the same passion as me. It judges a company's quality and its price separately, using criteria drawn from the financial literature (Warren Buffett, Michael Mauboussin, Aswath Damodaran).