KLA Corporation (KLAC): Who It Depends On
KLA makes the defect-inspection and metrology systems chipmakers use to keep advanced manufacturing lines in spec, but unlike some equipment peers it doesn't have a publicly documented network of named subsystem suppliers - its own 10-K discloses only generic sole-source component risk across a manufacturing footprint spanning the US, Singapore, Israel, Germany, the UK, Italy, and China. On the customer side, the concentration is real, specific, and disclosed by name: KLA's 10-K names TSMC and Samsung Electronics as customers each representing more than 10% of revenue in every one of its last three fiscal years, alongside a large and volatile China revenue base tied to export-control policy.
Supply-chain dependency
Unlike some equipment peers - for example Lam Research, whose gas- delivery and subsystem suppliers publicly disclose Lam as a top customer in their own SEC filings - KLA does not have a comparable, publicly documented network of named critical suppliers. KLA's own 10-K discloses only generic sole/limited-source component risk without naming vendor companies. Rather than present unconfirmed vendor names as real dependencies, this chart reflects the outsourced-manufacturing footprint KLA does disclose, by category and location.
Not a single company - KLA's inspection and metrology systems depend on precision optical, laser, and photonics components that KLA's own 10-K describes as sourced from a limited group of suppliers without naming them, a category central to KLA's core defect-detection technology.
Not a single company - KLA lists Israel among its named manufacturing and component-sourcing locations, reflecting optics and inspection engineering capability the company built up substantially through acquisitions over the years.
Not a single company - the ultra-precise wafer and sample stages and mechanical subassemblies inside KLA's systems are manufactured by a limited group of specialized suppliers that KLA's 10-K references only in generic sole-source risk language.
Not a single company - KLA names Singapore among its manufacturing locations for component sourcing and system assembly, part of its outsourcing strategy for building major subassemblies before final in-house design, assembly, and testing.
Not a single company - KLA names China among its manufacturing and sourcing locations, an exposure that sits alongside its large China customer revenue base as a geopolitical and export-control risk factor in its own filings.
Not a single company - KLA names Germany, the United Kingdom, and Italy among its manufacturing and component-sourcing locations for precision hardware used across its systems.
Customer concentration
Companies that make up an outsized share of KLAC's revenue - who KLAC relies on to buy from it.
Named directly in KLA's 10-K as a customer representing more than 10% of total revenue in fiscal 2025, 2024, and 2023, and widely understood by analysts to be KLA's single largest customer given TSMC's dominant leading-edge fab capital spending.
Named directly in KLA's 10-K as a customer representing more than 10% of total revenue in fiscal 2025, 2024, and 2023. Trades primarily on the Korea Exchange, with no proper US-listed ticker.
Not a single company - customers in China made up 33% of KLA's fiscal 2025 revenue, down from 43% in fiscal 2024, a large and volatile share tied to China's fab-buildout cycle and successive rounds of US export controls.
A historically large KLA customer for both its own leading-edge fabs and its newer Intel Foundry business, though not currently named at KLA's 10%-of-revenue disclosure threshold in the most recent 10-K.
A significant buyer of KLA's process-control tools for memory-fab yield management, per analyst coverage, though not currently named at KLA's 10%-of-revenue disclosure threshold. Trades primarily on the Korea Exchange, with no proper US-listed ticker.
A known industry customer for KLA's memory-fab process control tools, though not currently named at KLA's 10%-of-revenue disclosure threshold in the most recent 10-K.
The percentages shown are editorial estimates based on public research (company disclosures, earnings commentary, and industry reporting) meant to illustrate relative reliance, not precise or audited figures. Companies without a proper, reliably tradable ticker on this site are shown without stock/earnings links. This is not financial advice.