Lam Research Q3 2026 Guidance Outlook and Market Drivers

Summary: how Lam’s Q3 2026 guidance is expected to change—and why

Based on the provided earnings transcript excerpts, Lam did not explicitly state numerical “Q3 2026 guidance” changes. The company instead (1) set June 2026 quarter guidance, (2) guided on full-year / second-half performance framing, and (3) discussed an outlook for 2026 WFE (which is a key driver of tool demand). Therefore, the clearest “expected change” for the Q3 window is an implied continuation of upward momentum into the second half of 2026, rather than a specific revised Q3 figure being disclosed in these excerpts.

What Lam said about the path into the back half of 2026 (i.e., including Q3)

Management emphasized strong June-quarter guidance and an expectation that second-half 2026 revenues exceed first-half 2026. Specifically, they said their progress is evidenced by “our strong March quarter results, our higher June quarter outlook, and our expectation that second half calendar year revenues will exceed the first half” ¹.

They also told analysts/model-builders to keep the gross margin roughly at the levels guided in June for the rest of the year, implying margin durability through (and including) Q3 2026 ².

So, while no standalone “Q3 2026 guidance” numbers were provided here, the direction is that Lam expects:

• Higher revenue trajectory into Q3 relative to the first half, because second-half revenue is expected to be higher than first-half ¹.
• Gross margin to stay roughly flat (level) at June-guided levels for the remainder of the year, which would include Q3 ².

Key quantitative guidance reference points provided (June 2026 quarter) that shape the Q3 outlook

Lam gave detailed non-GAAP guidance for the June 2026 quarter:

• Revenue: $6.6B ± $400M ³
• Gross margin: 50.5% ± 1 ppt ³
• Operating margin: 36.5% ± 1 ppt ³
• EPS: $1.65 ± $0.15 (using ~1.255B shares) ³

Then management reiterated for the rest of the year that gross margin should be kept “roughly in the levels that we just guided you to in June” ². This is the closest actionable “guidance change” signal relevant to Q3 2026 in the excerpts.

Factors influencing the outlook (why Lam expects the back half to remain strong)

1) Upward shift in customer spending expectations for WFE (capital equipment)

Lam said it now expects 2026 WFE of $140B with a “bias to the upside,” after previously sharing an outlook for $135B in January ⁴.

Because WFE is directly tied to the demand environment for deposition/etch tools, this upward WFE framing supports the expectation of stronger results into Q3 and the second half ⁴¹.

Lam also linked rising customer projections “across all device segments” and noted the industry is “continu[ing] to work through various constraints” ⁴, which tends to support a steadier ramp rather than an abrupt step-down.

2) AI-driven semiconductor demand is increasing deposition and etch intensity

Management characterized the environment as an “accelerating AI-driven semiconductor demand environment” and attributed it to technology inflections requiring higher deposition/etch intensity ⁴.

They explicitly said that in such an accelerating environment, Lam sees “rising deposition and etch intensity,” creating a “multiyear outperformance setup” ¹. That’s an outlook driver for revenue (tools/services) that would carry into Q3.

3) Served available market (SAM) expansion for Lam

Lam stated its served available market “(SAM), percent of WFE” is expected to expand to “slightly more than the mid-30s percent level” in 2026, and is “well on track” toward its “high 30s percent” goal over the next few years ⁴.

This indicates not just a bigger pie (WFE), but also a higher share-of-spend for Lam—supporting a stronger back-half demand profile ⁴¹.

4) Memory technology transitions are pulling activity forward (conversion/greenfield dynamics)

Lam discussed NAND supply chain dynamics and AI-related bit demand:

• The industry is moving to higher layer-count NAND for AI data centers and Lam expects AI workloads to accelerate upgrades ⁵.
• It described conversion spending that was previously expected to occur over several years as being “pulled forward,” with “the majority of spending occurring before the end of calendar year 2027” ⁵.
• It also stated that overall industry installed wafer capacity is expected to decline more than 20% from prior highs by end of the year, which can encourage greenfield investment as bit demand grows ⁵.

These factors underpin why management expects opportunity to remain strong over the next quarters, including Q3, rather than fading quickly ⁵¹.

5) Tool performance and reliability improvements supporting share and margin

Lam noted that “performance of our tools” and maturity/reliability of new tools entering the field is important in fast ramp periods; they said higher R&D helps ensure new tools reach maturity beyond prior deliveries and that this yields benefits in “installation and warranty spending,” flowing through to gross margin ⁶.

This directly supports the company’s message that gross margin should stay around June levels through the year ².

6) Installed base momentum lifting Customer Support Business Group (CSBG) revenue

Lam reported:

• CSBG generated a record $2.1B in March quarter revenue, up 6% sequentially and 25% year-over-year ⁷.
• It also said the March quarter marked the first “$2 billion plus revenue quarter” for CSBG ⁸.
• CSBG growth is tied to an expanding installed base and spares/upgrades/services, benefiting from strong factory utilization, partly offset by Reliant ⁷.

Because installed-base services tend to be more “carry-forward” and less purely cyclical than new tool builds, this supports continued strength into Q3 (again consistent with the second-half outperformance framing) ⁷¹.

Direct answer to the question (Q3 2026 guidance expectation)

How is guidance expected to change in Q3 2026?

From the excerpts provided, Lam’s Q3 2026 “guidance change” is best characterized as:

• Revenue outlook: expected to remain strong / improve in the second half, since management expects “second half calendar year revenues will exceed the first half” ¹. This implies the Q3 environment should be better than the H1 baseline.
• Gross margin outlook: expected to level out around June-guided levels for the rest of the year, which includes Q3 ².
• Operating margin / EPS: the excerpt does not provide a revised standalone Q3 number; however, the June-quarter guidance provides the margin framework (gross margin 50.5% ±1 ppt; operating margin 36.5% ±1 ppt) that management indicated should be broadly maintained through the year on gross margin ³².

What factors are influencing this outlook?

The factors are:

1. Upward bias in 2026 WFE to $140B (from $135B in January) and broader customer spending moving higher ⁴.
2. AI-driven intensity increases (deposition/etch) and multiyear outperformance setup ⁴¹.
3. Lam SAM expansion to slightly above mid-30s % of WFE in 2026, tracking toward high-30s % ⁴.
4. Memory transitions (AI-related higher layer-count NAND; conversion timing pulled forward; greenfield investment prompted by declining installed wafer capacity) ⁵.
5. Tool maturity/performance and reliability improving margins via lower warranty/installation drag ⁶, supporting margin stability ².
6. Installed-base services momentum (CSBG record $2.1B quarter; spares/upgrades/services growth) supporting broader revenue strength into the back half ⁷¹.

In short: Lam did not publish an explicit standalone “Q3 2026 guidance revision” in the provided excerpts, but the company’s guidance trajectory indicates stronger second-half revenues and stable gross margins into Q3, driven by upward WFE expectations, AI-driven intensity, SAM/share gains, memory transition timing, and margin support from tool maturity and installed-base services ⁴⁵²¹⁷.