Customers or Suppliers: Which Side Should Investors Research First?

Key findings

• Micron’s Nvidia customer share and ASML procurement share measure different exposures and should not be ranked against each other as one risk score.
• A supplier-revenue forecast uses the supplier’s dependence on the affected buyer; a procurement-cost study uses the buyer’s cost share.
• Micron capex news should be filtered to the equipment category before being propagated to ASML, rather than read through from Micron sales growth alone.

Start with customers when the question is where a company's sales could change. Start with suppliers when the question is what could change its inputs, costs or ability to deliver. For a supplier's earnings forecast, the same buyer can become the customer to inspect. The correct research direction follows the financial statement being modeled, rather than a rule that one side of every network is more important.

Micron makes the choice concrete. Altsets estimates Nvidia at 17.62% of Micron revenue. It also estimates ASML at 11.91% of Micron costs, with Micron representing 7.64% of ASML revenue. These are three useful measurements across two commercial edges. A Micron revenue forecast, a Micron procurement-cost study and an ASML sales forecast need different ones.

Comparing 17.62% directly with 11.91% cannot decide which counterparty is "riskier." Revenue and cost percentages have different denominators, and a low-cost input can still constrain production if no qualified alternative exists. The useful first step is to state the outcome, identify the affected purchasing decision and select the corresponding relationship metric. That turns supplier and customer data into a focused research query instead of an undirected tour of every connected company.

Three financial questions select three measures

The table is a query specification, not a ranking of operating danger. Supplier revenue percentage always uses the seller's revenue base; customer cost percentage always uses the buyer's cost base. The meaning does not change when the investor switches which company's stock is being researched.

A revenue question needs purchasing evidence from the customer

For Micron, the Nvidia edge identifies a named downstream demand route. The next evidence should concern purchases of relevant Micron products, rather than Nvidia's total revenue alone. A customer can grow by changing prices, services or a product mix that does not produce a proportional increase in purchases from that supplier.

The Micron-Nvidia sensitivity analysis develops the detailed revenue bridge. Select the customer edge and supplier-revenue denominator before building that calculation. If the investment assumption concerns sales, an exhaustive upstream supplier review will not by itself test it.

A production question needs more than the supplier's cost share

For Micron delivery continuity, the ASML edge points upstream. Its cost share can prioritize the financial review, but it does not measure tool availability, replacement time, inventory coverage or the portion of output affected by one delayed input.

Inspect the relevant product and manufacturing process before treating the supplier as a bottleneck. A low-cost specialized input may govern production, while a larger procurement relationship may concern investment with a longer timing horizon.

This is why a delivery thesis may begin with a smaller cost share than a cost-inflation thesis. The modeled outcome determines the admission rule; the percentage helps scale or prioritize only after the event belongs on the edge.

A customer capex headline becomes a supplier question by category

Micron is ASML's customer on the equipment relationship. To forecast ASML sales, the relevant input is Micron purchasing from ASML, not Micron revenue growth. Stronger memory sales can reflect price, mix or better use of installed capacity without creating a matching equipment order.

Conversely, a technology transition can require investment while near-term sales are weak. Filter Micron investment evidence to the equipment category and delivery period before propagating it to ASML. The revenue-beat and capex-cut analysis examines the narrower case of conflicting signals from one company report.

Prioritize the edge that can reject the assumption

An efficient research process names the financial line first, then asks what counterparty evidence would force it to change. For customer-led growth, inspect relevant purchases and recognition. For delivery continuity, inspect input availability and qualified alternatives. For equipment demand, inspect the customer's applicable investment plan and orders.

Systematic models should preserve those channels separately too. Customer dependence can be tested against supplier sales revisions; procurement dependence can be tested against input-cost or delivery outcomes. Combining them into one importance score makes a failed prediction harder to explain.

Altsets methodology defines the metrics. The graph's advantage is that the same named relationship can support several clearly specified questions, provided the researcher retains whose revenue or costs each number describes.

Sources

• Altsets supply chain dataset
• LG Energy Solution on its Tesla ESS partnership

Related research

• Why Supplier Diversification Does Not Fix Customer Concentration

• Rank Commercial Relationships by Dollars, Revenue or Cost Share

• LG Energy Solution’s Tesla Exposure: A Revenue Stress Test

• Use Supply Chain Data Before Buying a Stock: Test Your Assumptions

Methodology

Read the methodology for this research.

Cite this research

Altsets Research. "Customers or Suppliers: Which Side Should Investors Research First?." Published September 17, 2026. https://www.altsets.com/research/customers-vs-suppliers-investor-priority

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