If Micron Cuts Purchasing, Which Quantified Supplier Is Most Exposed?
September 14, 2026
Altsets
Research by Altsets Research
ASML has the largest displayed dependence on Micron by supplier revenue share at 7.64%, followed by Lam at 5.61%, KLA at 4.59%, Applied Materials at 2.96%, and Shin-Etsu at 1.83%.
Data used:Altsets Supply Chain Intelligence: 90k+ entities, 400k+ relationships, 20+ years of history.
Key findings
- Micron represents 7.64% of ASML revenue, 5.61% of Lam revenue, 4.59% of KLA revenue, 2.96% of Applied Materials revenue, and 1.83% of Shin-Etsu revenue in the supplied data.
- The dependence ranking differs from absolute relationship-size ranking because KLA has a smaller relationship than Applied Materials but a larger Micron share of its own revenue base.
Among the five quantified Micron supplier relationships in the supplied Altsets data, ASML has the largest dependence on Micron by supplier revenue share. Micron represents 7.64% of ASML revenue, followed by 5.61% of Lam Research revenue, 4.59% of KLA revenue, 2.96% of Applied Materials revenue, and 1.83% of Shin-Etsu Chemical revenue. If the question is which supplier's own business is most exposed to a Micron purchasing slowdown, that ranking is more relevant than Micron's customer-side cost percentages.
The supplier-side ranking is ASML, Lam, KLA, Applied Materials, then Shin-Etsu
The five percentages use each supplier's own revenue as the denominator, so they can be used to compare how important Micron is to each supplier. ASML ranks first at 7.64%. Lam follows at 5.61%, then KLA at 4.59%, Applied Materials at 2.96%, and Shin-Etsu at 1.83%.
These percentages should not be added together because each one is measured against a different company's revenue base. Their value is comparative. They answer which supplier appears more dependent on Micron as a customer, not how much of a hypothetical Micron spending cut would automatically disappear from each supplier's revenue.
The ranking is not identical to relationship size
The supplied relationship sizes are 3B USD for ASML-Micron, 1.2B USD for Lam-Micron, 990M USD for Applied Materials-Micron, 693M USD for KLA-Micron, and 366M USD for Shin-Etsu-Micron. The first two positions remain ASML and Lam, but KLA and Applied Materials switch places when the ranking changes from absolute relationship size to supplier revenue dependence.
That reversal matters. Applied Materials has the larger dollar relationship with Micron, yet Micron occupies a larger share of KLA's own revenue base. An investor asking "who sells more to Micron?" and an investor asking "who is more dependent on Micron?" can therefore reach different answers.
A purchasing cut still needs product and capex context
Micron reducing purchasing would not necessarily affect all five suppliers in proportion to these percentages. A spending cut can target one equipment category while leaving another untouched. A technology transition can increase spending with one supplier while total capex falls. Long lead times, backlogs, deposits, service revenue, and order timing can also delay the financial effect.
That is why the supplier revenue percentage is a screening metric rather than a forecast. It tells the investor which supplier has more customer concentration to Micron and therefore deserves more attention if Micron's purchasing behavior changes materially.
The ranking can help separate company-specific supplier risk from a sector-wide capex call
An investor bearish on Micron purchasing does not automatically need to be bearish on every semiconductor-equipment company. ASML, Lam, KLA, and Applied Materials have large businesses serving many customers. The Altsets percentages reveal how large Micron is inside each supplier's own revenue base, allowing the investor to distinguish a Micron-specific customer hypothesis from a general semiconductor-capex thesis.
If Micron alone weakens while other manufacturers remain strong, suppliers with higher Micron revenue dependence deserve more focused research. If the whole semiconductor industry cuts spending, the customer ranking becomes only one part of a broader cycle analysis.
The conclusion is that ASML has the largest displayed Micron customer dependence in the five-supplier set
For a Micron-specific purchasing slowdown, the supplied Altsets data ranks ASML first at 7.64% of supplier revenue, Lam second at 5.61%, KLA third at 4.59%, Applied Materials fourth at 2.96%, and Shin-Etsu fifth at 1.83%. That is a direct proprietary ranking of customer dependence. It does not predict the size of the eventual revenue hit, which still depends on what Micron actually stops buying and when.
The Micron five-supplier cost study looks at the same supplier set from Micron's side rather than the suppliers' side. The KLA versus Applied Materials comparison shows why the ranking changes depending on which denominator matches the investment question.
For relationship definitions and evidence limits, read the Altsets methodology.