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KLA makes the machines and software that computer chip makers use to inspect and measure chips during production, so defects get caught before bad chips ship.
KLA is a chip-equipment company, and its specialty is quality control. Making a computer chip is a bit like printing billions of microscopic circuits onto a silicon wafer, and at that scale a speck of dust or a tiny misalignment ruins the product. KLA sells the inspection and measurement tools that chip factories run after nearly every manufacturing step, checking wafers for defects and confirming that the patterns came out the right size and shape. Its customers are the world's big chipmakers and the companies that supply them, and they pay up because catching problems early saves far more money than the tools cost.
The business has two main parts. The larger one is semiconductor process control: the machines and software that find defects and measure features on wafers. The smaller one serves printed circuit boards, displays, and advanced packaging, where KLA's tools check that components and connections are built correctly. In practice, KLA often wins because it offers a whole package — the tool, the software that analyzes what it sees, and the data that ties it together — and because chipmakers are slow to switch suppliers on something this critical to their yields. That combination has made it one of the most profitable companies in the equipment industry. Being this entrenched cuts both ways. KLA's fortune rises and falls with how much chipmakers spend on new factories and equipment, a market that swings hard from boom to bust. It also faces competition from bigger rivals like Applied Materials and from specialized inspection firms, plus political limits: export controls have restricted some sales of advanced chipmaking equipment to customers in China, which has been a meaningful part of its business. So the company depends on staying a step ahead technically while riding out cycles it cannot control.
KLA turns a lot of its profit into cash and gives much of it back to shareholders. It pays a dividend and has bought back a large chunk of its own shares over the years. That spending pays off when chip demand is strong; when the cycle turns, equipment orders cool and the stock tends to feel it.
Saved answer · last researched 21 Oct 2026