Lam Research (LRCX) has put up another solid quarter, with Q3 2026 revenue at US$5.8b, basic EPS at US$1.46, and trailing twelve month EPS at US$5.32 as earnings over the last year grew 44.1%. The company has seen revenue move from US$4.7b in Q3 2025 to US$5.8b in Q3 2026, while quarterly basic EPS moved from US$1.04 to US$1.46 over the same period. This has set the stage for the 30.9% net margin reported over the last twelve months versus 27.2% in the prior year. Overall, these results point to a business that is currently converting sales into profit at higher margin levels, which is central to the reward investors are focused on this season.

See our full analysis for Lam Research.

With the latest numbers on the table, the next step is to set this earnings profile against the key market narratives around Lam Research and see which stories still hold up and which start to look stretched.

44.1% earnings growth meets bullish margin story

• Over the last 12 months, Lam Research generated US$21.7b in revenue and US$6.7b in net income, with earnings up 44.1% year over year and a 30.9% net margin versus 27.2% a year earlier.
• Bulls argue that rising complexity in chips and tools like ALD Moly and dry resist could support multiyear margin expansion above current 30.9% levels. However, the latest trailing margin is still below the 37.1% margin that the bullish narrative looks for in three years, so current numbers partly support but do not yet fully match that upside story.
  • The bullish view ties future margin gains to a structurally larger market and higher value services. The trailing figures show margins already ahead of the prior 27.2% but still some distance from the 37.1% target.
  • With trailing EPS at US$5.32 and bullish expectations for earnings to reach US$12.47 per share by about 2029, the present earnings base leaves a sizeable gap that would need to be closed through further profit growth.

Some investors see this 44.1% earnings growth and widening margin as the early stage of the bullish case playing out. Others are watching to see if the story can truly stretch to those higher margin and earnings targets before committing to that view in full. 🐂 Lam Research Bull Case

P/E near peers while DCF flags valuation gap

• The trailing P/E of 48.2x sits roughly in line with the US Semiconductor industry at 48.3x and below the peer average of 62.2x. However, the supplied DCF fair value of US$126.60 is well below the current share price of US$258.56.
• Critics highlight that the bearish narrative, which assumes revenue growth of 5.1% a year and margins easing from 29.1% to 26.7%, fits more comfortably with a lower valuation. The DCF fair value of US$126.60 compared with the analyst price target of US$302.42 illustrates how far apart cautious and optimistic views are on what these cash flows should be worth.
  • Bears argue that export controls, rising competition and higher R&D and compliance costs could pressure margins. This would be more consistent with the lower margin path set out in their 26.7% assumption than with the current 30.9% level.
  • The fact that the share price of US$258.56 sits above the US$126.60 DCF fair value but below the US$302.42 price target captures how the market is currently pricing Lam Research between the bearish cash flow view and more optimistic analyst expectations.

For cautious investors, this mix of a peer level P/E, a DCF fair value well below the share price, and bearish margin assumptions helps frame why valuation remains a key point of debate. 🐻 Lam Research Bear Case

Revenue run rate and growth forecasts test consensus

• On a last twelve month basis, revenue sits at US$21.7b with Q3 2026 revenue at US$5.8b, while forecasts point to earnings growth of about 18.2% a year and revenue growth of about 17% a year compared with recent 44.1% earnings growth.
• Consensus narrative suggests that rising AI workloads, new fabs supported by government incentives and process technology leadership can support revenue growth of 17.9% a year and margin expansion from 30.2% to 31.5%. However, the current 30.9% margin and US$21.7b revenue base imply that future growth would be starting from already strong levels rather than from a weak point.
  • The 30.9% trailing margin is already above the 30.2% margin used as the starting point in the consensus assumptions. This means the incremental margin gain to 31.5% would be smaller than if margins were currently lower.
  • With analysts aiming for earnings of US$10.6b by about 2029 versus US$6.7b today, the step up that consensus expects is smaller than the bullish US$15.4b path but still asks for meaningful profit expansion on top of the recent 44.1% growth.

Next Steps

To see how these results tie into long-term growth, risks, and valuation, check out the full range of community narratives for Lam Research on Simply Wall St. Add the company to your watchlist or portfolio so you'll be alerted when the story evolves.

These earnings and valuation stories point in different directions, so it helps to move fast, test the numbers yourself, and weigh both sides. To round out that picture and see where risk and reward currently stand, check the 2 key rewards and 1 important warning sign.

See What Else Is Out There

Lam Research is producing strong earnings, but the gap between its US$126.60 DCF fair value and US$258.56 share price keeps valuation questions front and center.

If paying up for a stock that screens as expensive gives you pause, it makes sense to weigh alternatives using the 54 high quality undervalued stocks so you can quickly focus on ideas where price and fundamentals are more closely aligned.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.