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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Revenue growth is a starting point, not an investment verdict. To evaluate a semiconductor stock, first identify how the company makes money and which markets drive orders; then examine margins, inventory and cycle conditions, customer dependence, reinvestment, cash conversion, and valuation. Compare companies with similar business models and use reported figures as evidence—not as forecasts or industry benchmarks.
Start with the company’s place in the semiconductor supply chain
“Semiconductor company” covers businesses with very different economics. A foundry’s results depend heavily on factory utilization and the cost of building capacity; a fabless designer’s margins respond more to product mix and pricing; an equipment supplier’s orders can reflect customers’ investment plans rather than current chip shipments. Choose metrics only after identifying the model.
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| Business model | What to investigate |
|---|---|
| Fabless designer | Product and end-market mix, pricing, customer and program concentration, and how much production depends on outside manufacturing partners. |
| Foundry | Utilization, technology and customer mix, yields, manufacturing costs, capacity investment, and the time required for new capacity to contribute. |
| Integrated device manufacturer (IDM) | The balance between design and in-house manufacturing, factory utilization, product mix, and the capital required to maintain or expand production. |
| Memory supplier | Supply and demand, pricing, inventory, capacity additions, and profitability across different points in the cycle. |
| Equipment or materials supplier | Customer spending plans, order timing, backlog quality, end-market exposure, and dependence on a small number of buyers or projects. |
Then map products to end markets and ask what causes customers to buy: replacement demand, new designs, data-center investment, vehicle production, or another driver. TSMC describes a pure-play foundry model serving high-performance computing, smartphones, IoT, automotive, and consumer electronics. That mix helps explain its growth; the growth rate alone does not.
Peer comparisons should reflect supply-chain position, products, end markets, and cycle timing. A margin or growth ranking across unlike business models can conceal differences in capital requirements and revenue economics.
Explain what is changing in margins
Track gross and operating margins over several years, including more than one part of the cycle. A single-year margin can reflect utilization, product mix, temporary ramp costs, or pricing conditions that may not persist. For each change, look for a bridge that separates the drivers.
- Volume and utilization: Are higher sales filling existing capacity and spreading fixed costs, or requiring expensive new capacity?
- Product, technology, and customer mix: Are sales shifting toward products or manufacturing processes with different economics?
- Pricing, yields, and efficiency: Are selling prices holding up? Are production yields or manufacturing efficiency improving?
- Costs and ramps: What are input costs, depreciation, start-up expenses, and the cost of newer or overseas facilities doing to margins?
In its 2025 reporting, TSMC reported a gross margin of 59.9%, up from 56.1% in 2024, and an operating margin of 50.8%. The company attributed the gross-margin improvement in part to higher utilization and cost improvements; foreign exchange and margin dilution from overseas fabs were among the offsets it described. These are company-reported results and explanations, not a forecast or a benchmark for other chipmakers.
Pricing dynamics also differ by product. Skyworks says established-product average selling price erosion is typical in its industry and identifies volume, efficiency, cost, and higher-value products as drivers of gross profit. For any company, compare the explanation management gives with subsequent reported results: a favorable margin bridge matters more when its drivers persist than when it depends on a short-lived mix shift.
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Separate end demand from inventory and cycle effects
Sales growth can follow stronger end-market demand, a product launch, customer restocking, or an easier comparison with a weak prior period. Where company filings allow, distinguish what customers are selling or building from what they are ordering and accumulating in inventory.
- Check the company’s own inventory and inventory days, and note the reporting period.
- Read customer inventory and end-market commentary alongside shipments, orders, and any changes in guidance.
- Ask whether a recovery reflects new demand or customers replenishing stock they previously reduced.
- Consider whether a temporary inventory correction or ramp is distorting the year-over-year comparison.
GlobalFoundries’ 2025 Form 10-K says customers reduced excess inventory during 2025, while some consumer-centric markets continued to have elevated inventory. That is a useful reminder that conditions can differ by end market even within one supplier’s business.
TSMC’s fourth-quarter 2025 earnings-call transcript reported inventory days of 74 for that quarter. This is a company-specific, quarterly figure; it is not a universal target for foundries, designers, or other semiconductor businesses.
Measure dependence on customers, products, and programs
Read revenue notes and risk factors for the share of sales from major customers, end markets, products, or programs. Concentration can make broad-looking growth depend on a few buyers. Also consider whether a design win has reached production, whether customers can switch suppliers or alter sourcing, and how export controls or customer consolidation could affect orders.
| Company example | Reported concentration | How to interpret it |
|---|---|---|
| TSMC | Its largest customer accounted for 19% of net revenue in 2025, according to its Form 20-F. | A material share of foundry revenue depended on one customer that year. |
| ASML | Its 2025 reporting says its two largest customers accounted for 38.0% of net sales. | Customer concentration also matters in semiconductor equipment, not only in chip design or manufacturing. |
These figures describe different companies, supply-chain positions, and reporting measures; they illustrate what to look for rather than provide a directly comparable risk ranking.
Judge cash generation after the investment needed to produce it
Review operating cash flow, capital expenditure, working capital, debt, and share issuance across multiple years. Ask what capacity or technology the spending funds, when it could contribute revenue, and whether the expected returns justify the outlay. Check whether incentives, asset sales, or other items affect the company’s free-cash-flow definition.
TSMC reported 2025 operating cash flow of TWD 2.3 trillion, capital expenditure of TWD 1.3 trillion, and free cash flow of TWD 1 trillion. The company reported that free cash flow rose 15.2% from 2024. Those figures show why cash generation must be read alongside capacity spending; they are reported company results, not a forecast or a general semiconductor benchmark.
Definitions can also differ. Texas Instruments’ 2025 filing defines free cash flow as operating cash flow less capital expenditure plus proceeds from CHIPS Act incentives. Before comparing cash-flow figures across companies, check whether their definitions include the same items.
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A useful peer set is built around similar economics, not a broad industry label. For each candidate and its peers, line up the same fiscal periods and note whether figures are reported or adjusted. Compare these dimensions together:
- Business model and end markets: What does the company sell, who buys it, and what drives demand?
- Margins and their drivers: Are margins supported by utilization, mix, pricing, efficiency, or other factors—and are those factors durable?
- Cycle and inventory: Are the companies at comparable points in customer restocking, order changes, and end-market demand?
- Concentration: How dependent is each business on major customers, products, or programs?
- Reinvestment and cash: How much investment is required to sustain growth, and how does it affect cash conversion and balance-sheet risk?
- Valuation: Are you using the same date and comparable assumptions for each company?
Relate the share price to normalized business economics
Only after assessing the business should you choose valuation measures. For a profitable company, compare price with normalized earnings or cash generation. For a business at a cyclical trough or undertaking heavy investment, model plausible cycle conditions and include the capital spending needed to support the business. State whether inputs are trailing, forward, or normalized, and account for debt, other balance-sheet obligations, and dilution.
Valuation comparisons require a named security, share class, market-price date, and stated assumptions. Without those inputs, a growth rate or operating result cannot establish whether a stock is cheap or expensive.
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